General Rhizobia references

Here is a html version endnote bibliography database that I used for my PhD thesis in about 2006 . It is incomplete and will remain so. I wont be updating this again but hopefully will be of some use to someone. I did not use all of these in my thesis !
There is PDF version, too. Also a nicer version can be found on my CiteULike page.

There are 824 papers, sorted by author.

Abascal, F., R. Zardoya, and D. Posada. 2005. ProtTest: selection of best-fit models of protein evolution. Bioinformatics 21:2104-2105.

Abdallah, M. M. F., R. A. Jones, and A. S. El-Beltagy. 1989. An efficient method to overcome seed dormancy in Scotch broom (Cytisus scoparius). Environmental \& Experimental Botany 29:499-505.

Adekambi, T., and M. Drancourt. 2004. Dissection of phylogenetic relationships among 19 rapidly growing Mycobacterium species by 16S rRNA, hsp65, sodA, recA and rpoB gene sequencing. International Journal of Systematic and Evolutionary Microbiology 54:2095-2105.

Aguilar, O. M., M. V. Lopez, P. M. Riccillo, R. A. Gonzalez, M. Pagano, D. H. Grasso, A. Puhler, and G. Favelukes. 1998. Prevalence of the Rhizobium etli-Like Allele in Genes Coding for 16S rRNA among the Indigenous Rhizobial Populations Found Associated with Wild Beans from the Southern Andes in Argentina. Applied and Environmental Microbiology 64:3520-1427.

Aguilar, O. M., O. Riva, and E. Peltzer. 2004. Analysis of Rhizobium etli and of its symbiosis with wild Phaseolus vulgaris supports coevolution in centers of host diversification. Proceedings of the National Academy of Sciences of the United States of America 101:13548-13553.

Ahmad, M. H., and W. McLaughlin. 1985. Ecology and genetics of tropical rhizobia species. Biotechnol Adv 3:155-170.

Allen, E. K., and O. N. Allen. 1950. Biochemical and symbiotic properties of the rhizobia. Bacteriol Rev 14:273-330.

Allen, E. K., O. N. Allen, and A. S. Newman. 1953. Pseudonodulation of leguminous plants induced by 2-bromo-3,5-dichlorobenzoic acid. American Journal of Botany 40:725-731.

Allen, O. N., and E. K. Allen. 1936. Root nodule bacteria of some tropical leguminous plants. I. Cross nodulation studies with Vigna sinensis. Soil Science 42:61-77.

Allen, O. N., and E. K. Allen. 1939. Root nodule bacteria of some tropical leguminous plants. II. Cross nodulation studies with cowpea group. Soil Science 47:63-76.

Allen, O. N., and E. K. Allen. 1940. False nodulation on certain leguminous species. Proceedings of the National Academy of Sciences of the United States of America 35:15-16.

Allen, O. N., and E. K. Allen. 1981. The Leguminosae, a source book of characteristics, uses, and nodulation. University of Wisconsin Press, Madison, Wisc.

Amarger, N. 2001. Rhizobia in the field. Pages 109-168 in Advances in Agronomy.

Amarger, N., V. Macheret, G. Laguerre, and N. Amarger. 1997. \emph{Rhizobium gallicum} sp. nov. and \emph{Rhizobium giardinii} sp. nov., from \emph{Phaseolus vulgaris} nodules. International Journal of Systematic Bacteriology 47:996-1006.

Andre, S., M. Neyra, and R. Duponnois. 2003. Arbuscular mycorrhizal symbiosis changes the colonization pattern of Acacia tortilis spp. Raddiana rhizosphere by two strains of rhizobia. Microbial Ecology 45:137-144.

Andrews, J. H., and R. F. Harris. 2000. THE ECOLOGY AND BIOGEOGRAPHY OF MICROORGANISMS ON PLANT SURFACES. Annual Review of Phytopathology 38:145-180.

Antipchuk, A. F., and L. V. Kosenko. 2004. The influence of lipopolysaccharides and glucans from two Rhizobium leguminosarum bv. viciae strains on the formation and efficiency of their symbioses with pea plants. Mikrobiologiia 73:62-67.

Anzai, Y., H. Kim, J.-Y. Park, H. Wakabayashi, H. Oyaizu, and Y. Anzai. 2000. Phylogenetic affiliation of the pseudomonads based on 16S rRNA sequence. International Journal of Systematic and Evolutionary Microbiology 50:1563-1589.

Arnold, D. L., A. Pitman, and R. W. Jackson. 2003. Pathogenicity and other genomic islands in plant pathogenic bacteria. Molecular Plant Pathology 4:407-420.

Asai, V. T. 1944. \"Uber die mykorrrhizenbildung der Leguminosen = pflaznzen. Japanese Journal of Botany 13:463-485.

Ausubel, F. M., R. Brent, R. E. Kingston, D. D. Moore, J. G. Seidman, J. A. Smith, and K. Struhl. 1987. Current Protocols in Molecular Biology.

Ba, S., A. Willems, P. de Lajudie, P. Roche, H. Jeder, P. Quatrini, M. Neyra, M. Ferro, J. C. Prome, M. Gillis, C. Boivin-Masson, and J. Lorquin. 2002. Symbiotic and taxonomic diversity of rhizobia isolated from Acacia tortilis subsp. raddiana in Africa. Systematic and applied microbiology 25.

Bala, A., and K. E. Giller. 2001. Symbiotic specificity of tropical tree rhizobia for host legumes. New Phytologist 149:495-507.

Bala, A., P. Murphy, and K. E. Giller. 2001. Genetic diversity of rhizobia from natural populations varies with the soil dilution sampled. Soil Biology \& Biochemistry 33.

Bala, A., P. Murphy, and K. E. Giller. 2002. Occurrence and genetic diversity of rhizobia nodulating Sesbania sesban in African soils. Soil Biology \& Biochemistry 34.

Bala, A., P. Murphy, and K. E. Giller. 2003. Distribution and diversity of rhizobia nodulating agroforestry legumes in soils from three continents in the tropics. Molecular Ecology 12:917-929.

Bala, A., P. J. Murphy, A. O. Osunde, and K. E. Giller. 2003. Nodulation of tree legumes and the ecology of their native rhizobial populations in tropical soils. Applied Soil Ecology 22.

Bala, M., and Y. D. Gaur. 1993. Effect of mixed inoculation with isogenic strains of Bradyrhizobium on total nodules of pigeonpea. Current Science 65.

Barnett, M. J., R. F. Fisher, T. Jones, C. Komp, A. P. Abola, F. Barloy-Hubler, L. Bowser, D. Capela, F. Galibert, J. Gouzy, M. Gurjal, A. Hong, L. Huizar, R. W. Hyman, D. Kahn, M. L. Kahn, S. Kalman, D. H. Keating, C. Palm, M. C. Peck, R. Surzycki, D. H. Wells, K.-C. Yeh, R. W. Davis, N. A. Federspiel, and S. R. Long. 2001. Nucleotide sequence and predicted functions of the entire Sinorhizobium meliloti pSymA megaplasmid. Proceedings of the National Academy of Sciences of the United States of America 98:9883-9888.

Bassett, B., R. N. Goodman, and A. Novacky. 1977. Ultrastructure of soybean nodules. I: release of rhizobia from the infection thread. Canadian Journal of Microbiology 23:573-582.

Batut, J., and P. Boistard. 1994. Oxygen control in Rhizobium. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 66:129-150.

Batzli, J. M., W. R. Graves, and P. van Berkum. 1991. Isolation and characterization of rhizobia effective with \emph{Maackia amurensis}. Journal of the American Society for Horticultural Science 117:612-616.

Baxevanis, A. D., and B. F. F. Ouellette. 1998. Bioinformatics: A Practical Guide to the Analysis of Genes and Proteins.

Beauregard, M.-S., P. Seguin, C. C. Sheaffer, and P. H. Graham. 2003. Characterization and evaluation of North American Trifolium ambiguum -nodulating rhizobia. Biology and Fertility of Soils 38:311-318.

Bell, P. J. L., A. Sunna, M. D. Gibbs, N. C. Curach, H. Nevalainen, and P. L. Bergquist. 2002. Prospecting for novel lipase genes using PCR. Microbiology 148:2283-2291.

Bellingham, P. J., R. P. Buxton, R. P. Duncan, and W. G. Lee. 2004. Seedling growth rate and survival do not predict invasiveness in naturalized woody plants in New Zealand. Oikos 106:308-316.

Bellingham, P. J., L. R. Walker, and D. A. Wardle. 2001. Differential facilitation by a nitrogen-fixing shrub during primary succession influences relative performance of canopy tree species. Journal of Ecology 89:861-875.

Benhizia, Y., H. Benhizia, A. Benguedouar, R. Muresu, A. Giacomini, and A. Squartini. 2004. Gamma proteobacteria can nodulate legumes of the genus Hedysarum. Systematic and applied microbiology 27:462-468.

Benson, D. R. 1988. The genus Frankia: actinomycete symbionts of plants. Microbiol Sci 5:9-12.

Bergersen, F. J., and G. L. Turner. 1978. Activity of nitrogenase and glutamine synthetase in relation to availability of oxygen in continuous cultures of a strain of cowpea Rhizobium sp. supplied with excess ammonium. Biochimica et Biophysica Acta 538:406-416.

Bergsten, J. 2005. A review of long-branch attraction. Cladistics 21:163-193.

Beringer, J. E., N. Brewin, A. W. Johnston, H. M. Schulman, and D. A. Hopwood. 1979. The Rhizobium--legume symbiosis. Philosophical Transactions of the Royal Society of London Series B-Biological Sciences 204:219-233.

Beyene, D., S. Kassa, F. Ampy, A. Asseffa, T. Gebremedhin, and P. van Berkum. 2004. Ethiopian soils harbor natural populations of rhizobia that form symbioses with common bean ( Phaseolus vulgaris L.). Archives of Microbiology 181:129-136.

Bloem, J. F., and I. J. Law. 2001. Determination of competitive abilities of Bradyrhizobium japonicum strains in soils from soybean production regions in South Africa. Biology and Fertility of Soils 33:181-189.

Boivin, C., I. Ndoye, F. Molouba, P. deLajudie, N. Dupuy, and B. Dreyfus. 1997. Stem nodulation in legumes: Diversity, mechanisms, and unusual characteristics. Critical reviews in plant sciences 16:1-30.

Bonish, P. M., and K. W. Steele. 1985. Rhizobium populations in maize fields of the North Island, New Zealand. New Zealand Journal of Agricultural Research:299-303.

Bonish, P. M., K. W. Steele, and F. J. Neville. 1991. Denitrifying and symbiotic characteristics of lotus rhizobia from two New Zealand soils. New Zealand Journal of Agricultural Research:221-226.

Boogerd, F. C., and D. vanRossum. 1997. Nodulation of groundnut by Bradyrhizobium: a simple infection process by crack entry. Fems Microbiology Reviews 21:5-27.

Bossard, C. C., and M. Rejmanek. 1992. Why Have Green Stems. Functional Ecology 6:197-205.

Bras, C. P., M. A. Jordá, A. H. M. Wijfjes, M. Harteveld, N. Stuurman, H. P. Spaink, and J. E. Thomas-Oates. 2000. A Lotus japonicus nodulation system based on heterologous expression of the fucosyl transferase NodZ and the acetyl transferase NolL in Rhizobium leguminosarum. Molecular Plant-Microbe Interactions 13:475-479.

Bravo, A., and J. Mora. 1988. Ammonium assimilation in Rhizobium phaseoli by the glutamine synthetase-glutamate synthase pathway. Journal of Bacteriology 170:980-984.

Brewin, N. J. 1993. The Rhizobium-legume symbiosis: plant morphogenesis in a nodule. Semin Cell Biol 4:149-156.

Brewin, N. J. 2002. Pods and nods: A new look at symbiotic nitrogen fixing bacteria. Biologist 49:113-117.

Brewin, N. J. 2004. Plant cell wall remodelling in the rhizobium-legume symbiosis. Critical reviews in plant sciences 23:293-316.

Brockwell, J. 1963. Accuracy of a plant-infection technique for counting populations of Rhizobium trifolii. Applied Microbiology 11:377-383.

Broos, K., H. Beyens, and E. Smolders. 2005. Survival of rhizobia in soil is sensitive to elevated zinc in the absence of the host plant. Soil Biology \& Biochemistry 37:573-579.

Broughton, W. J. 2003. Roses by other names: Taxonomy of the Rhizobiaceae. Journal of Bacteriology 185:2975-2979.

Broughton, W. J., S. Jabbouri, and X. Perret. 2000. Keys to symbiotic harmony. Journal of Bacteriology 182:5641-5652.

Broughton, W. J., and X. Perret. 1999. Genealogy of legume-Rhizobium symbioses. Current Opinion in Plant Biology 2:305-311.

Brown, J. R. 2003. Ancient horizontal gene transfer. Nat Rev Genet 4:121-132.

Brownsey, P. J. 2001. New Zealand's pteridophyte flora - Plants of ancient lineage but recent arrival? Brittonia 53:284-303.

Bruneau, A., F. Forest, P. S. Herendeen, B. B. Klitgaard, and G. P. Lewis. 2001. Phylogenetic relationships in the Caesalpinioideae (Leguminosae) as inferred from chloroplast trnL intron sequences. Systematic Botany 26:487-514.

Bryan, J. A., G. P. Berlyn, and J. C. Gordon. 1996. Toward a new concept of the evolution of symbiotic nitrogen fixation in the leguminosae. Plant and Soil 186:151-159.

Burris, R. H., and P. W. Wilson. 1952. Effect of haemoglobin and other nitrogenous compounds on the respiration of the rhizobia. Biochemical Journal 51:90-96.

Byzezinski, K., B. Rogozinski, T. St{\c e}pkowski , G. Bujacz, and M. Jaskolski. 2004. Cloning purification crystallization and preliminary crystallographic studies of Bradyrhizobium fucosyltransferase NodZ. Acta Crystallographica 60:344-346.

Camacho, M., C. Santamaria, E. Temprano, D. N. Rodriguez-Navarro, A. Daza, R. Espuny, R. Bellog\'in, F. J. Ollero, M. Lyrade, A. Buendia-Claveria, J. Zhou, F. D. Li, C. Mateos, E. Vel\'azquez, J. M. Vinardell, and J. E. Ru\'iz-Sainz. 2002. Soils of the Chinese Hubei province show a very high diversity of Sinorhizobium fredii strains. Systematic and applied microbiology 25:592-602.

Cantera, J. J. L., H. Kawasaki, and T. Seki. 2002. Farnesyl diphosphate synthase gene of three phototrophic bacteria and its use as a phylogenetic marker. International Journal of Systematic and Evolutionary Microbiology 52:1953-1960.

Cantera, J. J. L., H. Kawasaki, and T. Seki. 2002. Evolutionary relationship of phototrophic bacteria in the ?-proteobacteria based on farnesyl diphosphate synthase. Microbiology 148:1923-1929.

Cantera, J. J. L., H. Kawasaki, and T. Seki. 2004. The nitrogen-fixing gene (\emph{nifH}) of \emph{Rhodopseudomonas palustris}: a case of lateral gene transfer? Microbiology 150:2237-2246.

Capela, D., F. Barloy-Hubler, J. Gouzy, G. Bothe, F. Ampe, J. Batut, P. Boistard, A. Becker, M. Boutry, E. Cadieu, S. Dreano, S. Gloux, T. Godrie, A. Goffeau, D. Kahn, E. Kiss, V. Lelaure, D. Masuy, T. Pohl, D. Portetelle, A. Puhler, B. Purnelle, U. Ramsperger, C. Renard, P. Thebault, M. Vandenbol, S. Weidner, and F. Galibert. 2001. Analysis of the chromosome sequence of the legume symbiont Sinorhizobium meliloti strain 1021. Proceedings of the National Academy of Sciences of the United States of America 98:9877-9882.

Carlson, R. W., B. Reuhs, T.-B. Chen, U. R. Bhat, and K. D. Noel. 1995. Lipopolysaccharide core structures in Rhizobium etli and mutants deficient in O-antigen. Journal of Biological Chemistry 270:11783-11788.

Cavalier-Smith, T. 2002. The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. International Journal of Systematic and Evolutionary Microbiology 52:7-76.

Cavalier-Smith, T. 2004. Only six kingdoms of life. Proceedings of the Royal Society of London Series B-Biological Sciences 271:1251-1262.

Cére?monie, H., B. Cournoyer, P. Normand, M. P. Fernandez, and F. Maillet. 1998. Genetic complementation of rhizobial nod mutants with Frankia DNA: Artifact or reality? Molecular and General Genetics 260:115-119.

Chaintreuil, C., E. Giraud, Y. Prin, J. Lorquin, A. Ba, M. Gillis, P. de Lajudie, and B. Dreyfus. 2000. Photosynthetic Bradyrhizobia Are Natural Endophytes of the African Wild Rice Oryza breviligulata. Applied and Environmental Microbiology 66:5437-1427.

Chen, H., B.-G. Long, and H.-Y. Song. 1996. Exopolysaccharide-deficient mutants of Astragali rhizobia are symbiotically effective on Astragalus sinicus, an indeterminate nodulating host. Plant and Soil 179:217-221.

Chen, H., A. E. Richardson, and B. G. Rolfe. 1993. Studies of the physiological and genetic basis of acid tolerance in Rhizobium leguminosarum biovar trifolii. Applied and Environmental Microbiology 59:1798-1804.

Chen, L., Y. Cui, M. Qin, Y. Wang, X. Bai, and Q. Ma. 1992. Identification of a nodD-like gene in Frankia by direct complementation of a Rhizobium nodD-mutant. Molecular and General Genetics 233:311-314.

Chen, L. S., A. Figueredo, F. O. Pedrosa, and M. Hungria. 2000. Genetic characterization of soybean rhizobia in Paraguay. Applied and Environmental Microbiology 66:5099-5103.

Chen, L. S., M. Hungria, A. Figueredo, H. Villani, and J. Michajluk. 2002. Diversity and symbiotic effectiveness of rhizobia isolated from field-grown soybean nodules in Paraguay. Biology and Fertility of Soils 35:448-457.

Chen, M., F. Xie, and J. Zhou. 2001. Diversity of \emph{Sinorhizobium fredii} strains. Ying Yong Sheng Tai Xue Bao 12:597-600.

Chen, M. Z., B. Xie, C. H. Huang, F. L. Xie, J. G. Yang, Q. Zhou, and J. C. Zhou. 2005. Study on genetic diversity and phylogeny of soybean rhizobia in China. Symbiosis 38:123-144.

Chen, R., R. Yaklich, D. L. Keister, A. A. Bhagwat, and R. Chen. 2002. Characterization of ndvD, the third gene involved in the synthesis of cyclic ?-(1?3),(1?6)-D-glucans in Bradyrhizobium japonicum. Canadian Journal of Microbiology 48:1008-1016.

Chen, W., E. Wang, S. Wang, Y. Li, and X. Chen. 1995. Characteristics of \emph{Rhizobium tianshanense} sp. nov., a moderately and slowly growing root nodule bacterium isolated from an arid saline environment in Xinjiang, People's Republic of China. International Journal of Systematic Bacteriology 45:153-159.

Chen, W. M., E. K. James, A. R. Prescott, M. Kierans, and J. I. Sprent. 2003. Nodulation of Mimosa spp. by the beta-proteobacterium Ralstonia taiwanensis. Molecular Plant-Microbe Interactions 16:1051-1061.

Chen, W. M., L. Moulin, C. Bontemps, P. Vandamme, G. Bena, and C. Boivin-Masson. 2003. Legume symbiotic nitrogen fixation by beta-proteobacteria is widespread in nature. Journal of Bacteriology 185:7266-7272.

Chen, W.-M., T.-M. Lee, C.-C. Lan, and C.-P. Cheng. 2000. Characterization of halotolerant rhizobia isolated from root nodules of Canavalia rosea from seaside areas. Fems Microbiology Ecology 34:9-16.

Chen, W. X., G. S. Li, Y. L. Qi, E. T. Wang, H. L. Yuan, and J. L. Li. 1991. \emph{Rhizobium huakuii} sp. nov. isolated from the root nodules of \emph{Astragalus sinicus}. International Journal of Systematic Bacteriology 41:275-280.

Chen, W. X., Z. Y. Tan, J. L. Gao, Y. Li, and E. T. Wang. 1997. \emph{Rhizobium hainanense} sp. nov, isolated from tropical legumes. International Journal of Systematic Bacteriology 47:870-873.

Chen, W. X., E. T. Wang, and L. D. Kuykendall. 2005. \emph{Mesorhizobium}. in D. J. Brenner, R. K. Krieg, J. T. Staley, and G. M. Garrity, editors. The Proteobacteria, Part C. Springer-Verlag, New York.

Chen, W. X., G. H. Yan, and J. L. Li. 1988. Numerical taxonomic study of fast-growing soybean rhizobia and a proposal that \emph{Rhizobium fredii} be assigned to \emph{Sinorhizobium} gen. nov. International Journal of Systematic Bacteriology 38:392-397.

Chhonkar, P. K., and N. S. Subba-Rao. 1966. Fungi associated with legume root nodules and their effect on rhizobia. Canadian Journal of Microbiology 12:1253-1261.

Chimote, V., and L. R. Kashyap. 2003. Organization pattern of common nod genes in Mesorhizobium ciceri strain MC 18-7. Journal of Plant Biochemistry and Biotechnology 12:57-59.

Choi, B.-H., and H. Ohashi. 1996. Pollen Morphology and Taxonomy of Hedysarum and Its Related Genera of the Tribe Hedysareae (Leguminosae-Papilionoideae). Journal of Japanese Botany 71:191-213.

Choma, A., T. Urbanik-Sypniewska, R. Russa, J. Kutkowska, and H. Mayer. 2000. Occurrence and taxonomic significance of oxo-fatty acids in lipopolysaccharides from members of Mesorhizobium. Systematic and applied microbiology 23:185-190.

Clemens, J. 2001. The wild origins of Clianthus cultivars and their value for ex situ conservation. International Plant Propagators' Society. Combined Proceedings of Annual Meetings 51:92-93.

Clos, D. 1896. Caract\`eres ext\'erieurs et modes de r\'epartition des petits tubercules ou tuberculo\"ides des l\'egumineuses. C. R. Acad. Sci. 123:407-410.

Cohan, F. M. 2001. Bacterial species and speciation. Systematic Biology 50:513-524.

Cohan, F. M. 2002. Sexual isolation and speciation in bacteria. Genetica 116:359-370.

Cohan, F. M. 2002. What are bacterial species? Annual Review of Microbiology 56:457-487.

Cohn, J., R. B. Day, and G. Stacey. 1998. Legume nodule organogenesis. Trends in plant science 3:105-110.

Colebatch, G., B. Trevaskis, and M. Udvardi. 2002. Symbiotic nitrogen fixation research in the postgenomics era. New Phytologist 153.

Collins, M. T., J. E. Thies, and L. K. Abbott. 2002. Diversity and symbiotic effectiveness of Rhizobium leguminosarum bv. trifolii isolates from pasture soils in south-western Australia. Australian Journal of Soil Research 40:1319-1329.

Cook, D. R. 2004. Unraveling the mystery of Nod factor signaling by a genomic approach in Medicago trunactula. Proceedings of the National Academy of Sciences of the United States of America 101:4339-4340.

Correa, O. S., E. A. Rivas, and A. J. Barneix. 1999. Cellular envelopes and tolerance to acid pH in Mesorhizobium loti. Current Microbiology 38:329-334.

Coutinho, H. L. C., V. M. de Olivera, and F. M. Moreira. 2000. Recent developments in systematics and their implications for plant pathogenic bacteria. Pages 107-134 in F. G. Preist and M. Goodfellow, editors. Applied Microbial Systematics. Kluwer Academic Publishers, Dordrecht.

Crisp, M., L. Cook, and D. Steane. 2004. Radiation of the Australian flora: What can comparisons of molecular phylogenies across multiple taxa tell us about the evolution of diversity in present-day communities? Philosophical Transactions of the Royal Society of London Series B Biological Sciences 359:1551-1571.

Crow, V. L., B. D. W. Jarvis, and R. M. Greenwood. 1981. Deoxyribonucleic acid homologies among acid-producing strains of \emph{Rhizobium}. International Journal of Systematic Bacteriology 31:152-172.

Cubas, P., C. Pardo, and H. Tahiri. 2002. Molecular approach to the phylogeny and systematics of Cytisus (Leguminosae) and related genera based on nucleotide sequences of nrDNA (ITS region) and cpDNA (trnL-trnF intergenic spacer). Plant Systematics and Evolution 233:223-242.

Cullimore, J. V., R. Ranjeva, and J. J. Bono. 2001. Perception of lipo-chitooligosaccharidic Nod factors in legumes. Trends in plant science 6:24-30.

Dangeard, P. A. 1926. Recherches sur les tubercules radicaux des l\'egumineuses. Le Botaniste, Paris.

Danso, S. K., S. O. Keya, and M. Alexander. 1975. Protozoa and the decline of Rhizobium populations added to soil. Canadian Journal of Microbiology 21:884-895.

D'Antuono, A. L., R. A. Ugalde, V. C. Lepek, A. Casabuono, and A. Couto. 2005. Nodule development induced by Mesorhizobium loti mutant strains affected in polysaccharide synthesis. Molecular Plant-Microbe Interactions 18:446-457.

Dauga, C. 2002. Evolution of the gyrB gene and the molecular phylogeny of Enterobacteriaceae: A model molecule for molecular systematic studies. International Journal of Systematic and Evolutionary Microbiology 52:531-547.

Davison, J. 1999. Genetic exchange between bacteria in the environment. Plasmid 42:73-91.

Dawson, M. 1900. Further observations on the nature and functions of the nodules of leguminous plants. Philosophical Transactions of the Royal Society of London ser. B. 193:51-67.

de Faria, S. M., G. P. Lewis, J. I. Sprent, and J. M. Sutherland. 1989. Occurrence of nodulation in the Leguminosae. New Phytologist 111:607-619.

de Lajudie, P., E. Laurent-Fulele, A. Willems, U. Torck, R. Coopman, M. D. Collins, K. Kersters, B. Dreyfus, and M. Gillis. 1998. \emph{Allorhizobium undicola} gen. nov., sp. nov., nitrogen-fixing bacteria that efficiently nodulate \emph{Neptunia natans} in Senegal. International Journal of Systematic Bacteriology 48:1277-1290.

de Lajudie, P., A. Willems, G. Nick, S. H. Mohamed, U. Torck, R. Coopman, A. Filali-Maltouf, K. Kersters, B. Dreyfus, K. Lindstr\"om, and M. Gillis. 1999. \emph{Agrobacterium} bv. 1 strains isolated from nodules of tropical legumes. Systematic and applied microbiology 22:119-132.

de Lajudie, P., A. Willems, G. Nick, F. Moreira, F. Molouba, B. Hoste, U. Torck, M. Neyra, M. D. Collins, K. Lindstr\"om, B. Dreyfus, and M. Gillis. 1998. Characterization of tropical tree rhizobia and description of \emph{Mesorhizobium plurifarium} sp. nov. International Journal of Systematic Bacteriology 48:369-382.

de Lajudie, P., A. Willems, B. Pot, D. Dewettinck, G. Maestrojuan, M. Neyra, M. D. Collins, B. Dreyfus, K. Kersters, and M. Gillis. 1994. Polyphasic taxonomy of rhizobia: Emendation of the genus \emph{Sinorhizobium} and description of \emph{Sinorhizobium meliloti} comb. nov., \emph{Sinorhizobium saheli} sp. nov., and \emph{Sinorhizobium teranga} sp. nov. International Journal of Systematic Bacteriology:715-733.

de Lange, P. J., P. B. Heenan, D. R. Given, D. A. Norton, C. C. Ogle, P. N. Johnson, and E. K. Cameron. 1999. Threatened and uncommon plants of New Zealand. New Zealand Journal of Botany 37:603-628.

de Lange, P. J., D. A. Norton, P. B. Heenan, S. P. Courtney, B. P. J. Molloy, C. C. Ogle, B. D. Rance, P. N. Johnson, and R. Hitchmough. 2004. Erratum: Threatened and uncommon plants of New Zealand (New Zealand Journal of Botany (2004) 42 (45-76)). New Zealand Journal of Botany 42:715.

de Queiroz, K., and J. Gauthier. 1992. Phylogenetic taxonomy. Annual Review of Ecology and Systematics 23:449-480.

Deans, J. D., O. M. Ali, D. K. Lindley, and H. O. A. Nour. 1993. Rhizobial nodulation of Acacia tree species in Sudan: soil inoculum potential and effects of peat. Journal of Tropical Forest Science 6:56-64.

Debell\'e, F., L. Moulin, B. Mangin, J. D\'enarie, and C. Boivin. 2001. Nod genes and Nod signals and the evolution of the rhizobium legume symbiosis. Acta Biochimica Polonica 48:359-365.

Debell\'e, F., C. Plazanet, P. Roche, C. Pujol, C. Rosenberg, J. D\'enarie, A. Savagnac, and J.-C. Prom\'e. 1996. The NodA proteins of Rhizobium meliloti and Rhizobium tropici specify the N-acylation of Nod factors by different fatty acids. Molecular Microbiology 22:303-314.

Debell\'e, F., C. Rosenberg, and J. D\'enarie. 1992. The Rhizobium, Bradyrhizobium, and Azorhizobium NodC proteins are homologous to yeast chitin synthases. Molecular Plant-Microbe Interactions 5:443-446.

del Papa, M. F., L. J. Balague, S. C. Sowinski, C. Wegener, E. Segundo, F. M. Abarca, N. Toro, K. Niehaus, A. Puhler, O. M. Aguilar, G. Martinez-Drets, and A. Lagares. 1999. Isolation and Characterization of Alfalfa-Nodulating Rhizobia Present in Acidic Soils of Central Argentina and Uruguay. Applied and Environmental Microbiology 65:1420-1427.

Demina, N. S. 1978. Ability of free-living nodule bacteria to fix atmospheric nitrogen. Biol Bull Acad Sci USSR 5:281-288.

Denison, R. F., C. Bledsoe, M. Kahn, F. O'Gara, E. L. Simms, and L. S. Thomashow. 2003. Cooperation in the rhizosphere and the ``free rider'' problem. Ecology 84:838-845.

Denison, R. F., and E. T. Kiers. 2004. Lifestyle alternatives for rhizobia: mutualism, parasitism, and forgoing symbiosis. FEMS Microbiology Letters 237:187-193.

Denison, R. F., and E. T. Kiers. 2004. Why are most rhizobia beneficial to their plant hosts, rather than parasitic? Microbes and Infection 6:1235-1239.

Diabate, M., A. Munive, S. M. de Faria, A. Ba, B. Dreyfus, and A. Galiana. 2005. Occurrence of nodulation in unexplored leguminous trees native to the West African tropical rainforest and inoculation response of native species useful in reforestation. New Phytologist 166:231-239.

Dincturk, H. B. 2001. Glutamate synthase: an archaeal horizontal gene transfer? J Biosci 26:13-14.

Dixon, R. O. 1969. Rhizobia (with particular reference to relationships with host plants). Annual Review of Microbiology 23:137-158.

Djordjevic, S. P., H. Chen, and M. Batley. 1987. Nitrogen fixation ability of exopolysaccharide synthesis mutants of Rhizobium sp. strain NGR234 and Rhizobium trifolii is restored by the addition of homologous exopolysaccharides. Journal of Bacteriology 169:53-60.

Djordjevic, S. P., R. W. Ridge, H. C. Chen, J. W. Redmond, M. Batley, and B. G. Rolfe. 1988. Induction of pathogenic-like responses in the legume Macroptilium atropurpureum by a transposon-induced mutant of the fast-growing, broad-host-range Rhizobium strain NGR234. Journal of Bacteriology 170:1848-1857.

Dobrindt, U., B. Hochhut, U. Hentschel, and J. Hacker. 2004. Genomic islands in pathogenic and environmental microorganisms. Nature Reviews Microbiology 2:414-424.

Doignon-Bourcier, F., A. Sy, A. Willems, U. Torck, B. Dreyfus, M. Gillis, and P. de Lajudie. 1999. Diversity of bradyrhizobia from 27 tropical Leguminosae species native of Senegal. Systematic and applied microbiology 22:647-661.

Doignon-Bourcier, F., A. Willems, R. Coopman, G. Laguerre, M. Gillis, and P. de Lajudie. 2000. Genotypic characterization of Bradyrhizobium strains nodulating small Senegalese legumes by 16S-23S rRNA intergenic gene spacers and amplified fragment length polymorphism fingerprint analyses. Applied and Environmental Microbiology 66:3987-3997.

Donnelly, D., and J. H. Hoffmann. 2004. Utilization of an unpredictable food source by Melanterius ventralis, a seed-feeding biological control agent of Acacia longifolia in South Africa. BioControl 49:225-235.

Doolittle, R. F., D. F. Feng, K. L. Anderson, and M. R. Alberro. 1990. A naturally occurring horizontal gene transfer from a eukaryote to a prokaryote. J Mol Evol 31:383-388.

Downie, J. A. 1994. Signalling strategies for nodulation of legumes by rhizobia. Trends in Microbiology 2:318-324.

Downie, J. A., and M. Parniske. 2002. Plant biology - Fixation with regulation. Nature 420:369-370.

Downie, J. A., and S. A. Walker. 1999. Plant responses to nodulation factors. Current Opinion in Plant Biology 2:483-489.

Doyle, J. J. 1994. Phylogeny of the Legume Family - an Approach to Understanding the Origins of Nodulation. Annual Review of Ecology and Systematics 25:325-349.

Doyle, J. J. 1998. Phylogenetic perspectives on nodulation: evolving views of plants and symbiotic bacteria. Trends in plant science 3:473-478.

Doyle, J. J., J. A. Chappill, D. C. Bailey, and T. Kajita. 2000. Towards a comprehensive phylogeny of legumes: evidence from \emph{rbcL} sequences and non-molecular data. Pages 1-20 in P. S. Herendeen and A. Bruneau, editors. Advances in Legume Systematics. Royal Botanic Gardens, Kew.

Doyle, J. J., J. L. Doyle, J. A. Ballenger, E. E. Dickson, T. Kajita, and H. Ohashi. 1997. A phylogeny of the chloroplast gene rbcL in the leguminosae: Taxonomic correlations and insights into the evolution of nodulation. American Journal of Botany 84:541-554.

Doyle, J. J., and M. A. Luckow. 2003. The rest of the iceberg. Legume diversity and evolution in a phylogenetic context. Plant Physiology 131:900-910.

Dreyfus, B., J. L. Garcia, and M. Gillis. 1988. Characterization of \emph{Azorhizobium caulinodans} gen. nov., sp. nov., a stem-nodulating nitrogen-fixing bacterium isolated from \emph{Sesbania rostrata}. International Journal of Systematic Bacteriology 38:89-98.

Droge, M., A. Puhler, and W. Selbitschka. 1998. Horizontal gene transfer as a biosafety issue: a natural phenomenon of public concern. J Biotechnol 64:75-90.

Dröge, M., A. Pühler, and W. Selbitschka. 1999. Horizontal gene transfer among bacteria in terrestrial and aquatic habitats as assessed by microcosm and field studies. Biology and Fertility of Soils 29:221-245.

Durner, J., and D. F. Klessig. 1999. Nitric oxide as a signal in plants. Current Opinion in Plant Biology 2:369-374.

Dutta, C., and A. Pan. 2002. Horizontal gene transfer and bacterial diversity. J Biosci 27:27-33.

Duzan, H. M., X. Zhou, A. Souleimanov, and D. L. Smith. 2004. Perception of Bradyrhizobium japonicum Nod factor by soybean [Glycine max (L.) Merr.] root hairs under abiotic stress conditions. J Exp Bot 55:2641-2646.

Eardly, B., and P. Van Berkum. 2005. Use of population genetic structure to define species limits in the Rhizobiaceae. Symbiosis 38:109-122.

Eardly, B. D., L. A. Materon, N. H. Smith, D. A. Johnson, M. D. Rumbaugh, and R. K. Selander. 1990. Genetic structure of natural populations of the nitrogen-fixing bacterium Rhizobium meliloti. Applied and Environmental Microbiology:187-194.

Eardly, B. D., S. M. Nour, P. van Berkum, and R. K. Selander. 2005. Rhizobial 16S rRNA and dnaK Genes: Mosaicism and the Uncertain Phylogenetic Placement of Rhizobium galegae. Applied and Environmental Microbiology 71:1328-1335.

Egelhoff, T. T., and S. R. Long. 1985. Rhizobium meliloti nodulation genes: Identification of nodDABC gene products, purification of nodA protein, and expression of nodA in Rhizobium meliloti. Journal of Bacteriology 164:591-599.

Elkan, G. H. 1992. Taxonomy of the Rhizobia. Canadian Journal of Microbiology 38:446-450.

Esseling, J. J., and A. M. Emons. 2004. Dissection of Nod factor signalling in legumes: cell biology, mutants and pharmacological approaches. J Microsc 214:104-113.

Esseling, J. J., F. G. Lhuissier, and A. M. Emons. 2003. Nod factor-induced root hair curling: continuous polar growth towards the point of nod factor application. Plant Physiol 132:1982-1988.

Estrada-De los Santos, P., R. Bustillos-Cristales, and J. Caballero-Mellado. 2001. Burkholderia, a genus rich in plant-associated nitrogen fixers with wide environmental and geographic distribution. Applied and Environmental Microbiology 67:2790-2798.

Euz\'eby, J. P. 1997. List of bacterial names with standing in nomenclature: A folder available on the internet. International Journal of Systematic Bacteriology 47:590-592.

Evans, W. R., and D. L. Keister. 1976. Reduction of acetylene by stationary cultures of free-living Rhizobium sp. under atmospheric oxygen levels. Canadian Journal of Microbiology 22:949-952.

Falla, T. J., and I. Chopra. 1999. Stabilization of Rhizobium symbiosis plasmids. Microbiology 145:515-516.

Farrand, S. K., P. B. van Berkum, and P. Oger. 2003. Agrobacterium is a definable genus of the family Rhizobiaceae. International Journal of Systematic and Evolutionary Microbiology 53:1681-1687.

Felsenstein, J. 1985. Confidence limits on phylogenies: An approach using the bootstrap. Evolution 39:783-791.

Felsenstein, J. 1988. Phylogenies from molecular sequences: inference and reliability. Annual Review of Genetics 22:521-565.

Felsenstein, J. 2001. Taking variation of evolutionary rates between sites into account in inferring phylogenies. Journal of Molecular Evolution 53:447-455.

Felsenstein, J. 2001. The troubled growth of statistical phylogenetics. Systematic Biology 50:465-467.

Felsenstein, J., and H. Kishino. 1993. Is There Something Wrong with the Bootstrap on Phylogenies - a Reply. Systematic Biology 42:193-200.

Feng, J., Q. Li, H.-L. Hu, X.-C. Chen, and G.-F. Hong. 2003. Inactivation of the nod box distal half-site allows tetrameric NodD to activate nodA transcription in an inducer-independent manner. Nucleic Acids Research 31:3143-3156.

Feng, L., R. J. Roughley, and L. Copeland. 2002. Morphological Changes of Rhizobia in Peat Cultures. Applied and Environmental Microbiology 68:1064-1070.

Fenton, M., and B. D. W. Jarvis. 1994. Expression of the symbiotic plasmid from Rhizobium leguntinosarum biovar trifolii in Sphingobacterium multivorum. Canadian Journal of Microbiology:873-879.

Ferguson, B. J., and U. Mathesius. 2003. Signaling Interactions during Nodule Development. Journal of Plant Growth Regulation 22:47-72.

Ferreira, M. C., L. M. De O. Chueire, S. M. Takemura, M. Hungria, and D. De S. Andrade. 2000. Tillage method and crop rotation effects on the population sizes and diversity of bradyrhizobia nodulating soybean. Soil Biology and Biochemistry 32:627-637.

Ferreira, M. C., and M. Hungria. 2002. Recovery of soybean inoculant strains from uncropped soils in Brazil. Field Crops Research 79:139-152.

Finan, T. M. 2002. Evolving insights: symbiosis islands and horizontal gene transfer. Journal of Bacteriology 184:2855-2856.

Finan, T. M., S. Weidner, K. Wong, J. Buhrmester, P. Chain, F. J. Vorholter, I. Hern\'andez-Lucas, A. Becker, A. Cowie, J. Gouzy, B. Golding, and A. Puhler. 2001. The complete sequence of the 1,683-kb pSymB megaplasmid from the N2-fixing endosymbiont \emph{Sinorhizobium meliloti}. Proceedings of the National Academy of Sciences of the United States of America 98:9889-9894.

Fitter, A. H., and B. Moyersoen. 1996. Evolutionary trends in root-microbe symbioses. Philosophical Transactions of the Royal Society of London Series B Biological Sciences 351:1367-1375.

Fogarty, G., and J. M. Facelli. 1999. Growth and competition of Cytisus scoparius, an invasive shrub, and Australian native shrubs. Plant Ecology 144:27-35.

Foster, C. M., H. T. Horner, and W. R. Graves. 1998. Nodulation response of woody Papilionoid species after inoculation with rhizobia and soil from Hawaii, Asia and North America. Plant and Soil 205:103-111.

Foster, C. M., H. T. Horner, and W. R. Graves. 2000. Accumulation of \emph{ENOD2}-Like Transcripts in Non-Nodulating Woody Papilionoid Legumes. Plant Physiol. 124:741-750.

Foucher, F., and E. Kondorosi. 2000. Cell cycle regulation in the course of nodule organogenesis in Medicago. Plant Molecular Biology 43:773-786.

Fountain, D. W., and H. A. Outred. 1991. Germination requirements of New Zealand native plants: a review. New Zealand Journal of Botany 29:311-316.

Frank, B. 1879. Ueber die Parasiten in den Wurzelanschwillungen der Papilionaceen. Botanische Zeitung 37:376-387, 394-399.

Frank, B. 1889. Ueber die Pilzsymbiose der Leguminosen. Berichte der Deutschen Botanischen Gesellschaft 7:332-346.

Fraysse, N., F. Couderc, and V. Poinsot. 2003. Surface polysaccharide involvement in establishing the rhizobium-legume symbiosis. European Journal of Biochemistry 270:1365-1380.

Freiberg, C., A. Rosenthal, R. Fellay, W. J. Broughton, X. Perret, and A. Bairoch. 1997. Molecular basis of symbiosis between Rhizobium and legumes. Nature 387:394-401.

Frioni, F., D. Malates, I. Irigoyen, and R. Dodera. 1998. Promiscuity for nodulation and effectivity in the N2-fixing legume tree Acacia caven in Uruguay. Applied Soil Ecology 7.

Frioni, L., A. Rodriguez, and M. Meerhoff. 2001. Differentiation of rhizobia isolated from native legume trees in Uruguay. Applied Soil Ecology 16:275-282.

Fuchs, R. L., and D. L. Keister. 1980. Identification of two glutamine synthetases in Agrobacterium. Journal of Bacteriology 141:996-998.

Fukuda, T., T. Nakamura, I.-J. Song, T. Ito, A. Kanno, T. Kameya, J. Yokoyama, M. Maki, and T. Ochiai. 2005. Molecular phylogeny and evolution of alcohol dehydrogenase (Adh) genes in legumes. BMC Plant Biology 5.

Gadgil, R. L., G. B. Douglas, F. J. Ede, H. F. Beeser, and A. G. Foote. 2001. Establishment of nitrogen-fixing plants from seed on partially stabilised coastal sand. New Zealand Journal of Forestry Science 31:339-346.

Gadgil, R. L., A. T. Lowe, and A. M. Sandberg. 1999. Two seedling rooting media and subsequent growth of nitrogen-fixing plants in a New Zealand coastal sand-dune environment. New Zealand Journal of Forestry Science 29:195-202.

Gage, D. J. 2004. Infection and invasion of roots by symbiotic, nitrogen-fixing rhizobia during nodulation of temperate legumes. Microbiology and Molecular Biology Reviews 68:280-300.

Gage, D. J., and W. Margolin. 2000. Hanging by a thread: invasion of legume plants by rhizobia. Current Opinion in Microbiology 3:613-617.

Galli-Terasawa, L. V., C. Glienke-Blanco, and M. Hungria. 2003. Diversity of a soybean rhizobial population adapted to a Cerrados soil. World Journal of Microbiology and Biotechnology 19:933-939.

Gao, J., Z. Terefework, W. Chen, and K. Lindstr\"om. 2001. Genetic diversity of rhizobia isolated from \emph{Astragalus adsurgens} growing in different geographical regions of China. Journal of Biotechnology 91:155-168.

Gao, J. L., J. G. Sun, Y. Li, E. T. Wang, and W. X. Chen. 1994. Numerical taxonomy and DNA relatedness of tropical rhizobia isolated from Hainan Province, China. International Journal of Systematic Bacteriology 44:151-158.

Gao, J.-L., S. L. Turner, F. L. Kan, E. T. Wang, Z. Y. Tan, Y. H. Qiu, J. Gu, Z. Terefework, J. P. W. Young, K. Lindstr\"om, and W. X. Chen. 2004. \emph{Mesorhizobium septentrionale} sp. nov. and \emph{Mesorhizobium temperatum} sp. nov., isolated from \emph{Astragalus adsurgens} growing in the northern regions of China. International Journal of Systematic and Evolutionary Microbiology 54:2003-2012.

Gao, L., X. Deng, H. Wang, and Z. Hu. 2004. Diversity and resistance of rhizobia isolated from \emph{Caragana intermedia} in Maowusu sandland. Ying Yong Sheng Tai Xue Bao 15:44-48.

Garnock-Jones, P. J., and I. Breitwieser. 1998. New Zealand floras and systematic botany: Progress and prospects. Australian Systematic Botany 11:175-184.

Gaude, N., H. Tippmann, M. Udvardi, P. Dörmann, E. Flemetakis, and P. Katinakis. 2004. The galactolipid digalactosyldiacylglycerol accumulates in the peribacteroid membrane of nitrogen-fixing nodules of soybean and Lotus. Journal of Biological Chemistry 279:34624-34630.

Gaunt, M. W., S. L. Turner, L. Rigottier-Gois, S. A. Lloyd-Macgilp, and J. P. Young. 2001. Phylogenies of atpD and recA support the small subunit rRNA-based classification of rhizobia. International Journal of Systematic and Evolutionary Microbiology 51:2037-2048.

Geiger, O., and I. M. Lopez-Lara. 2002. Rhizobial acyl carrier proteins and their roles in the formation of bacterial cell-surface components that are required for the development of nitrogen-fixing root nodules on legume hosts. FEMS Microbiology Letters 208:153-162.

Genkai-Kato, M., and N. Yamamura. 1999. Evolution of mutualistic symbiosis without vertical transmission. Theor Popul Biol 55:309-323.

Gest, H. 2003. Names of bacteria and their evolutionary relationships. Microbiology 149:1956-1958.

Gibson, A. H. 1980. Methods for legumes in glasshouses and controlled environment cabinets. Methods for Evaluating Biological Nitrogen Fixation:139-184.

Godley, E. J. 1975. Kowhais. New Zealand Nature Heritage 65:1804-1806.

Godley, E. J. 1989. The supposed Easter Island Sophora in Christchurch, New Zealand. Botanic Gardens Conservation News 1:37-38.

Goldblatt, P. 1981. Cytology and the phylogeny of Leguminosae. Advances in Legume Systematics:427-463.

Golebiowska, J., and U. Sypniewska. 1962. The effect of the plant and of ecological conditions on development of symbiosis between Lupine and Rhizobium lupini. Acta Microbiol. Polonica 11:319-328.

Gonzalez, J. E., and M. M. Marketon. 2003. Quorum sensing in nitrogen-fixing rhizobia. Microbiol Mol Biol Rev 67:574-592.

Goormachtig, S., W. Capoen, E. K. James, and M. Holsters. 2004. Switch from intracellular to intercellular invasion during water stress-tolerant legume nodulation. Proceedings of the National Academy of Sciences of the United States of America 101:6303-6308.

Gottfert, M., S. Rothlisberger, C. Kundig, C. Beck, R. Marty, and H. Hennecke. 2001. Potential symbiosis-specific genes uncovered by sequencing a 410-kilobase DNA region of the Bradyrhizobium japonicum chromosome. Journal of Bacteriology 183:1405-1412.

Graff, A., and S. Stubner. 2003. Isolation and molecular characterization of thiosulfate-oxidizing bacteria from an Italian rice field soil. Systematic and applied microbiology 26:445-452.

Graham, P. H., M. J. Sadowsky, H. H. Keyser, Y. M. Barnet, R. S. Bradley, J. E. Cooper, D. J. Deley, B. D. W. Jarvis, E. B. Roslycky, B. W. Strijdom, and J. P. W. Young. 1991. Proposed Minimal Standards for the Description of New Genera and Species of Root-Nodulating and Stem-Nodulating Bacteria. International Journal of Systematic Bacteriology 41:582-587.

Green, P. S. 1994. Norfolk Island and Lord Howe Island. Flora of Australia 49:1-26.

Greenwood, R. M. 1969. \emph{Rhizobium} studies in New Zealand soils. New Zealand Soil News:45-48.

Greenwood, R. M. 1977. The \emph{Rhizobium} component of the nitrogen-fixing symbiosis. Pages 167-174 in Proceedings of the New Zealand Grassland Association, Nelson.

Greenwood, R. M. 1978. Rhizobia associated with indigenous legumes of New Zealand and Lord Howe Island. Pages 402-403 in M. W. Loutit and J. A. R. Miles, editors. Microbial Ecology. Springer-Verlag, Dunedin.

Greenwood, R. M. 1992. Some Differences between Plants of the Chatham Islands and the New-Zealand Mainland. New Zealand Journal of Ecology 16:51-52.

Greenwood, R. M., and N. O. Bathurst. 1978. Effect of rhizobial strain and host on the amino acid patterns in legume root nodules. New Zealand Journal of Science 21:107-120.

Grobbelaar, N., and B. Clarke. 1974. A qualitative study of the nodulating ability of legume species: List 4. Agroplantae 6.

Gruner, I., and P. B. Heenan. 2001. Viability and germination of seeds of Carmichaelia (Fabaceae) after prolonged storage. New Zealand Journal of Botany 39.

Guindon, S., and O. Gascuel. 2003. A Simple, Fast, and Accurate Algorithm to Estimate Large Phylogenies by Maximum Likelihood. Systematic Biology 52:696-704.

Gulash, M., P. Ames, R. C. Larosiliere, and K. Bergman. 1984. Rhizobia are attracted to localized sites on legume roots. Applied and Environmental Microbiology 48:149-152.

Hafeez, F. Y., M. E. Safdar, K. A. Malik, and A. U. Chaudhry. 2004. Rhizobial inoculation improves seedling emergence, nutrient uptake and growth of cotton. Australian Journal of Experimental Agriculture 44:617-622.

Hahn, N. J. 1966. The Congo red reaction in bacteria and its usefulness in the identification of rhizobia. Canadian Journal of Microbiology 12:725-733.

Hamdi, Y. A. 1974. Vertical movement of rhizobia in soil. Zentralbl Bakteriol Parasitenkd Infektionskr Hyg 129:373-377.

Hamdi, Y. A. 1977. Certain environmental factors affecting rhizobia and symbiotic systems. Zentralbl Bakteriol Parasitenkd Infektionskr Hyg 132:350-360.

Han, S.-Z., E.-T. Wang, W.-X. Chen, and S.-Z. Han. 2005. Diverse bacteria isolated from root nodules of Phaseolus vulgaris and species within the genera Campylotropis and Cassia grown in China. Systematic and applied microbiology 28:265-276.

Hanin, M., S. Jabbouri, D. QuesadaVincens, C. Freiberg, X. Perret, J. C. Prome, W. J. Broughton, and R. Fellay. 1997. Sulphation of Rhizobium sp. NGR234 Nod factors is dependent on noeE, a new host-specificity gene. Molecular Microbiology 24:1119-1129.

Hao, W., and G. B. Golding. 2004. Patterns of bacterial gene movement. Mol Biol Evol 21:1294-1307.

Harris, J. 2002. Shedding light on an underground problem. Proceedings of the National Academy of Sciences of the United States of America 99:14616-14618.

Harris, J. M., R. Wais, and S. R. Long. 2003. Rhizobium-induced calcium spiking in Lotus japonicus. Molecular Plant-Microbe Interactions 16:335-341.

Hastings, A., R. M. Greenwood, and M. H. Proctor. 1966. Legume inoculation in New Zealand. Department of Scientific and Industrial Research, Wellington.

Haukka, K., K. Lindstr\"om, and J. P. W. Young. 1998. Three phylogenetic groups of nodA and nifH genes in \emph{Sinorhizobium} and \emph{Mesorhizobium} isolates from leguminous trees growing in Africa and Latin America. Applied and Environmental Microbiology 64:419-426.

Haukka, K., J. P. W. Young, and K. Lindstr\"om. 1996. Diversity of partial 16S rRNA sequences among and within strains of African rhizobia isolated from \emph{Acacia} and \emph{Prosopis}. Systematic and applied microbiology 19:352-359.

Heenan, P. B. 1995. Typification of names in \emph{Carmichaelia}, \emph{Chordospartium}, \emph{Corallospartium}, and \emph{Notospartium} (Fabaceae-Galegeae) from New Zealand. New Zealand Journal of Botany 33:439-454.

Heenan, P. B. 1995. A taxonomic revision of \emph{Carmichaelia} (Fabaceae -- Galegeae) in New Zealand. (part I). New Zealand Journal of Botany 33:455-475.

Heenan, P. B. 1995. The typification of \emph{Clianthus puniceus} (Fabaceae-Galegeae). New Zealand Journal of Botany 33:561-562.

Heenan, P. B. 1996. Identification and distribution of the Marlborough pink brooms, \emph{Notospartium carmichaeliae} and \emph{N. glabrescens} (Fabaceae - Galegeae), in New Zealand. New Zealand Journal of Botany 34.

Heenan, P. B. 1996. A taxonomic revision of \emph{Carmichaelia} (Fabaceae-Galegeae) in New Zealand. (Part II). New Zealand Journal of Botany 34:157-177.

Heenan, P. B. 1997. Wood anatomy of the \emph{Carmichaelia} (Fabaceae) complex in New Zealand. New Zealand Journal of Botany 35:395-415.

Heenan, P. B. 1997. Heteroblasty in \emph{Carmichaelia}, \emph{Chordospartium}, \emph{Corallospartium}, and \emph{Notospartium} (Fabaceae Galegeae) from New Zealand. New Zealand Journal of Botany 35:243-249.

Heenan, P. B. 1997. Fruit anatomy of \emph{Clianthus puniceus} and \emph{Swainsona novae-zelandiae} (Fabaceae - Galegeae). New Zealand Journal of Botany 35:119-123.

Heenan, P. B. 1997. Heteroblasty in \emph{Carmichaelia}, \emph{Chordospartium}, \emph{Corallospartium}, and \emph{Notospartium} (Fabaceae - Galegeae) from New Zealand. New Zealand Journal of Botany 35:243-249.

Heenan, P. B. 1998. Phylogenetic anaylsis of the \emph{Carmichaelia} complex, \emph{Clianthus}, and \emph{Swainsona} (Fabaceae), from Australia and New Zealand. New Zealand Journal of Botany 36:21-40.

Heenan, P. B. 1998. Reinstatement of \emph{Sophora longicarinata} (Fabaceae--Sophoreae) from northern South Island, New Zealand, and typification of \emph{S. microphylla}. New Zealand Journal of Botany 36:369-379.

Heenan, P. B. 1998. An emended circumscription of \emph{Carmichaelia}, with new combinations, a key, and notes on hybrids. New Zealand Journal of Botany 36.

Heenan, P. B. 1998. \emph{Montigena} (Fabaceae), a new genus endemic to New Zealand. New Zealand Journal of Botany 36:41-51.

Heenan, P. B. 1998. The pollination system and stigmatic cuticle of \emph{Clianthus puniceus} (Fabaceae). New Zealand Journal of Botany 36:311-314.

Heenan, P. B. 2000. \emph{Clianthus} (Fabaceae) in New Zealand: a reappraisal of Colenso's taxonomy. New Zealand Journal of Botany 38.

Heenan, P. B. 2001. The correct name for Chilean pelu (Fabaceae): the identity of \emph{Edwardsia macnabiana} and the reinstatement of \emph{Sophora cassioides}. New Zealand Journal of Botany 39.

Heenan, P. B. 2001. Relationships of Streblorrhiza (Fabaceae), an extinct monotypic genus from Phillip Island, South Pacific Ocean. New Zealand Journal of Botany 39:9-15.

Heenan, P. B., M. I. Dawson, and S. J. Wagstaff. 2004. The relationship of Sophora sect. Edwardsia (Fabaceae) to Sophora tomentosa, the type species of the genus Sophora, observed from DNA sequence data and morphological characters. Botanical Journal of the Linnean Society 146:439-446.

Heenan, P. B., and P. J. de Lange. 1999. Reproductive biology, ecology and conservation of Carmichaelia williamsii (Fabaceae), a vulnerable legume from New Zealand. Pacific Conservation Biology 5:179-190.

Heenan, P. B., P. J. de Lange, and A. D. Wilton. 2001. \emph{Sophora} (Fabaceae) in New Zealand: taxonomy, distribution, and biogeography. New Zealand Journal of Botany 39:17-53.

Hennecke, H., K. Kaluza, B. Th\"ony, M. Fuhrmann, W. Ludwig, and E. Stackebrandt. 1985. Concurrent evolution of nitrogenase genes and 16S rRNA in Rhizobium species and other nitrogen fixing bacteria. Archives of Microbiology 142:342-348.

Herbarium, A. 2000. New Zealand Plant Names Database. in. Landcare Research, New Zealand.

Hern\'andez-Lucas, I., M. A. Pardo, L. Segovia, J. Miranda, and E. Mart\'inez-Romero. 1995. Rhizobium tropici chromosomal citrate synthase gene. Applied and Environmental Microbiology 61:3992-3997.

Hern\'andez-Lucas, I., M. A. Rogel-Hern\'andez, E. Mart\'inez-Romero, L. Segovia, and K. Rojas-Jim\'enez. 2004. Phylogenetic relationships of rhizobia based on citrate synthase gene sequences. Systematic and applied microbiology 27:703-706.

Hern\'andez-Lucas, I., L. Segovia, E. Mart\'inez-Romero, and S. G. Pueppke. 1995. Phylogenetic relationships and host range of Rhizobium spp. that nodulate Phaseolus vulgaris L. Applied and Environmental Microbiology 61:2775-2779.

Herrera-Cervera, J. A., J. Caballero-Mellado, G. Laguerre, H. V. Tichy, N. Requena, N. Amarger, E. Mart\'inez-Romero, J. Olivares, and J. Sanjuan. 1999. At least five rhizobial species nodulate Phaseolus vulgaris in a Spanish soil. Fems Microbiology Ecology 30:87-97.

Herrera-Cervera, J. A., J. M. Sanjuan-Pinilla, J. Olivares, and J. Sanjuan. 1998. Cloning and identification of conjugative transfer origins in the Rhizobium meliloti genome. Journal of Bacteriology 180:4583-4590.

Herrick, J. B., K. G. Stuart-Keil, W. C. Ghiorse, and E. L. Madsen. 1997. Natural horizontal transfer of a naphthalene dioxygenase gene between bacteria native to a coal tar-contaminated field site. Applied and Environmental Microbiology 63:2330-2337.

Hicks, D. L., D. J. Campbell, and I. A. E. Atkinson. 2001. Options for managing the Kaimaumau Wetland, Northland, New Zealand. Science for Conservation:5-75.

Hilario, E., T. R. Buckley, and J. M. Young. 2004. Improved resolution on the phylogenetic relationships among \emph{Pseudomonas} by the combined analysis of \emph{atpD}, \emph{carA}, \emph{recA} and 16S rDNA. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 86:51-64.

Hilario, E., and J. P. Gogarten. 1993. Horizontal transfer of ATPase genes--the tree of life becomes a net of life. Biosystems 31:111-119.

Hill, R. L., and A. H. Gourlay. 2002. Host-range testing, introduction, and establishment of Cydia succedana (Lepidoptera: Tortricidae) for biological control of gorse, Ulex europaeus L., in New Zealand. Biological Control 25:173-186.

Hill, R. L., A. H. Gourlay, and R. J. Barker. 2001. Survival

of Ulex europaeus seeds in the soil at three sites

in New Zealand. New Zealand Journal of Botany 39:235-244.

Hirsch, A. M. 1999. Role of lectins (and rhizobial exopolysaccharides) in legume nodulation. Current Opinion in Plant Biology 2:320-326.

Hirsch, A. M. 2004. Plant-microbe symbioses: A continuum from commensalism to parasitism. Symbiosis 37:345-363.

Hirsch, A. M., and T. A. LaRue. 1997. Is the legume nodule a modified root or stem or an Organ sui generis? Critical reviews in plant sciences 16:361-392.

Hirsch, A. M., M. R. Lum, and J. A. Downie. 2001. What makes the rhizobia-legume symbiosis so special? Plant Physiology 127:1484-1492.

Hirsch, A. M., and M. J. McFall-Ngai. 2000. Fundamental concepts in symbiotic interactions: Light and dark, day and night, squid and legume. Journal of Plant Growth Regulation 19:113-130.

Hirsch, A. M., K. J. Wilson, and J. D. G. Jones. 1984. Rhizobium meliloti nodulation genes allow Agrobacterium tumefaciens and Escherichia coli to form pseudonodules on alfalfa. Journal of Bacteriology 158:1133-1143.

Hirsch, P. R. 1996. Population dynamics of indigenous and genetically modified rhizobia in the field. New Phytologist 133:159-171.

Hirsch, P. R. 2005. Release of transgenic bacterial inoculants - Rhizobia as a case study. Plant and Soil 266:1-10.

Hodisan, V., and M. Tamas. 1977. Sarothamnus scoparius (L) Wimm. in the Padurea Neagra spa (Bihor district). Farmacia 25:143-148.

Hong, G. F., J. E. Burn, and A. W. Johnston. 1987. Evidence that DNA involved in the expression of nodulation (nod) genes in Rhizobium binds to the product of the regulatory gene nodD. Nucleic Acids Research 15:9677-9690.

Hooker, J. D. 1853. Flora Novae-Zelandiae. Reeve, London.

Horiuchi, J.-i., B. Prithiviraj, H. P. Bais, B. A. Kimball, and J. M. Vivanco. 2005. Soil nematodes mediate positive interactions between legume plants and rhizobium bacteria. Planta:1-10.

Horner, D., W. Martin, R. Blankenship, T. Cavalier-Smith, and E. Nisbet. 2003. On the origins of cells: a hypothesis for the evolutionary transitions from abiotic geochemistry to chemoautotrophic prokaryotes, and from prokaryotes to nucleated cells - Discussion. Philosophical Transactions of the Royal Society of London Series B-Biological Sciences 358:83-85.

Howieson, J., and R. Ballard. 2004. Optimising the legume symbiosis in stressful and competitive environments within southern Australia - Some contemporary thoughts. Soil Biology and Biochemistry 36:1261-1273.

Howieson, J. G., G. W. O'Hara, and S. J. Carr. 2000. Changing roles for legumes in Mediterranean agriculture: Developments from an Australian perspective. Field Crops Research 65:107-122.

Hu, J.-M., M. Lavin, M. F. Wojciechowski, and M. J. Sanderson. 2000. Phylogenetic systematics of the tribe Millettieae (Leguminosae) based on chloroplast trnK/matK sequences and its implications for evolutionary patterns in Papilionoideae. American Journal of Botany 87:418-430.

Hu, J.-M., M. Lavin, M. F. Wojciechowski, M. J. Sanderson, and J. I. Davis. 2002. Phylogenetic analysis of nuclear ribosomal ITS/5.8S sequences in the tribe Millettieae (Fabaceae): Poecilanthe-Cyclolobium, the core Millettieae, and the Callerya group. Systematic Botany 27:722-733.

Hubber, A., J. T. Sullivan, C. W. Ronson, A. C. Vergunst, and P. J. J. Hooykaas. 2004. Symbiotic phenotypes and translocated effector proteins of the Mesorhizobium loti strain R7A VirB/D4 type IV secretion system. Molecular Microbiology 54:561-574.

Huber, T., G. Faulkner, and P. Hugenholtz. 2004. Bellerophon: A program to detect chimeric sequences in multiple sequence alignments. Bioinformatics 20:2317-2319.

Hugenholtz, P., and T. Huber. 2003. Chimeric 16S rDNA sequences of diverse origin are accumulating in the public databases. International Journal of Systematic and Evolutionary Microbiology 53:289-293.

Hughes, D. 2002. Sophora - The Kowhais of New Zealand. International Plant Propagators' Society. Combined Proceedings of Annual Meetings 52:201-205.

Hungria, M., C. M. Joseph, and D. A. Phillips. 1991. Rhizobium nod gene inducers exuded naturally from roots of common bean (Phaseolus vulgaris L.). Plant Physiology 97:759-764.

Hungria, M., C. M. Joseph, and D. A. Phillips. 1991. Anthocyanidins and flavonols, major nod gene inducers from seeds of a black-seeded common bean (Phaseolus vulgaris L.). Plant Physiology 97:751-758.

Hurr, K. A., P. J. Lockhart, P. B. Heenan, and D. Penny. 1999. Evidence for the recent dispersal of Sophora (Leguminosae) around the Southern Oceans: molecular data. Journal of Biogeography 26:565-577.

Ibewiro, B., M. Onuh, N. Sanginga, V. Bernard, and R. Merckx. 2001. Symbiotic performance of herbaceous legumes in tropical cover cropping systems. ScientificWorldJournal 1 Suppl 2:17-21.

Intrieri, M. C., and M. Buiatti. 2001. The horizontal transfer of Agrobacterium rhizogenes genes and the evolution of the genus Nicotiana. Molecular Phylogenetics and Evolution 20:100-110.

Irwin, G., and C. Walrond. 2005. When was New Zealand first settled? Ministry for Culture and Heritage, Wellington.

Iyer, L. M., E. V. Koonin, and L. Aravind. 2004. Evolution of bacterial RNA polymerase: implications for large-scale bacterial phylogeny, domain accretion, and horizontal gene transfer. Gene 335:73-88.

Jaftha, J. B., B. W. Strijdom, and P. L. Steyn. 2002. Characterization of pigmented methylotrophic bacteria which nodulate Lotononis bainesii. Systematic and applied microbiology 25:440-449.

Jain, M. K., and R. B. Rewari. 1976. Studies on seed coat toxicity to rhizobia of urid (Phaseolus mungo), mung (Phaseolus aureus), and soybean (Glycine max). Zentralbl Bakteriol Parasitenkd Infektionskr Hyg 131:163-169.

Jain, R., M. C. Rivera, J. E. Moore, and J. A. Lake. 2003. Horizontal gene transfer accelerates genome innovation and evolution. Mol Biol Evol 20:1598-1602.

Jarabo-Lorenzo, A., R. P\'erez-Galdona, J. Donate-Correa, R. Rivas, E. Vel\'azquez, M. Hernandez, F. Temprano, E. Mart\'inez-Molina, T. Ruiz-Argueso, and M. Le\'on-Barrios. 2003. Genetic diversity of bradyrhizobial populations from diverse geographic origins that nodulate Lupinus spp. and Ornithopus spp. Systematic and applied microbiology 26:611-623.

Jarabo-Lorenzo, A., E. Vel\'azquez, R. P\'erez-Galdona, M. C. Vega-Hernandez, E. Mart\'inez-Molina, P. F. Mateos, P. Vinuesa, E. Mart\'inez-Romero, and M. Le\'on-Barrios. 2000. Restriction fragment length polymorphism analysis of 16S rDNA and low molecular weight RNA profiling of rhizobial isolates from shrubby legumes endemic to the Canary islands. Systematic and applied microbiology 23:418-425.

Jarvis, B. D. W. 1983. Genetic diversity of Rhizobium strains which nodulate Leucaena leucocephala. Current Microbiology:153-158.

Jarvis, B. D. W., A. G. Dick, and R. M. Greenwood. 1980. Deoxyribonucleic acid homology among strains of Rhizobium trifolii and related species. International Journal of Systematic Bacteriology:42-52.

Jarvis, B. D. W., H. L. Downer, and J. P. W. Young. 1992. Phylogeny of Fast-Growing Soybean-Nodulating Rhizobia Supports Synonymy of Sinorhizobium and Rhizobium and Assignment to Rhizobium-Fredii. International Journal of Systematic Bacteriology 42:93-96.

Jarvis, B. D. W., M. Gillis, and J. De Ley. 1986. Intra- and intergeneric similarities between the ribosomal ribonucleic acid cistrons of Rhizobium and Bradyrhizobium species and some related bacteria. International Journal of Systematic Bacteriology:129-138.

Jarvis, B. D. W., T. S. MacLean, I. G. C. Robertson, and G. R. Fanning. 1977. Phenetic similarity and DNA base sequence homology of root nodule bacteria from New Zealand native legumes and \emph{Rhizobium} strains from agricultural plants. New Zealand Journal of Agricultural Research 20:235-248.

Jarvis, B. D. W., C. E. Pankhurst, and J. J. Patel. 1982. \emph{Rhizobium loti}, a New Species of Legume Root Nodule Bacteria. International Journal of Systematic Bacteriology 32:378-380.

Jarvis, B. D. W., K. F. Scott, and J. E. Hughes. 1983. Conservation of genetic information between different Rhizobium species. Canadian Journal of Microbiology:200-209.

Jarvis, B. D. W., S. Sivakumaran, S. W. Tighe, and M. Gillis. 1996. Identification of Agrobacterium and Rizobium species based on cellular fatty acid composition. Plant and Soil 184:143-158.

Jarvis, B. D. W., P. Van Berkum, W. X. Chen, S. M. Nour, M. P. Fernandez, J. C. Cleyet-Marel, and M. Gillis. 1997. Transfer of \emph{Rhizobium loti}, \emph{Rhizobium huakuii}, \emph{Rhizobium ciceri}, \emph{Rhizobium mediterraneum}, and \emph{Rhizobium tianshanense} to \emph{Mesorhizobium} gen. nov. International Journal of Systematic Bacteriology:895-898.

Jaspers, E., and J. Overmann. 2004. Ecological Significance of Microdiversity: Identical 16S rRNA Gene Sequences Can Be Found in Bacteria with Highly Divergent Genomes and Ecophysiologies. Applied and Environmental Microbiology 70:4831-4839.

Jing, Y., B. T. Zhang, and X. Q. Shan. 1990. Pseudonodules formation on barley roots induced by Rhizobium astragali. FEMS Microbiology Letters 69:123-128.

Johnson, D., L. E. Roth, and G. Stacey. 1989. Immunogold localization of the NodC and NodA proteins of Rhizobium meliloti. Journal of Bacteriology 171:4583-4588.

Johnson, M. D., and O. N. Allen. 1952. Cultural reactions of rhizobia with special reference to strains isolated from Sesbania species. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 18:1-12.

Jordan, D. C. 1982. Transfer of \emph{Rhizobium japonicum} Buchanan 1980 to \emph{Bradyrhizobium} gen. nov., a genus of slow-growing, root nodule bacteria from leguminous plants. International Journal of Systematic Bacteriology 32:136-139.

Jordan, D. C. 1984. Family III. Rhizobiaceae. Pages 234-256 in R. K. Krieg and J. G. Holt, editors. Bergey's Manual of Systematic Bacteriology. Williams and Wilkins, Baltimore.

Jordan, M., M. Larrain, A. Tapia, and C. Roveraro. 2001. In vitro regeneration of Sophora toromiro from seedling explants. Plant Cell Tissue and Organ Culture 66:89-95.

Jourand, P., E. Giraud, G. B\'ena, A. Sy, B. Dreyfus, P. de Lajudie, A. Willems, and M. Gillis. 2004. \emph{Methylobacterium nodulans} sp. nov., for a group of aerobic, facultatively methylotrophic, legume root-nodule-forming and nitrogen-fixing bacteria. International Journal of Systematic and Evolutionary Microbiology 54:2269-2273.

K\"ass, E., and M. Wink. 1996. Molecular evolution of the leguminosae: Phylogeny of the three subfamilies based on rbcL-sequences. Biochemical Systematics and Ecology 24:365-378.

K\"ass, E., and M. Wink. 1997. Phylogenetic relationships in the Papilionoideae (family Leguminosae) based on nucleotide sequences of cpDNA (\emph{rbcL}) and ncDNA (ITS 1 and 2). Molecular Phylogenetics and Evolution 8:65-88.

Kadrmas, J. L., C. R. H. Raetz, R. E. Studholme, J. T. Sullivan, C. W. Ronson, D. Allaway, and P. S. Poole. 1998. Cloning and overexpression of glycosyltransferases that generate the lipopolysaccharide core of Rhizobium leguminosarum. Journal of Biological Chemistry 273:26432-26440.

Kajita, T., H. Ohashi, Y. Tateishi, C. D. Bailey, and J. J. Doyle. 2001. rbcL and legume phylogeny, with particular reference to Phaseoleae, Millettieae, and allies. Systematic Botany 26:515-536.

Kalia, A., and R. P. Gupta. 2002. Nodule induction in non-legumes by rhizobia. Indian Journal of Microbiology 42:183-193.

Kalita, M., W. Ma{\l}ek, and A. Kaznowski. 2004. Analysis of genetic relationship of Sarothamnus scoparius microsymbionts and Bradyrhizobium sp. by hybridization in microdilution wells. Journal of Bioscience and Bioengineering 97.

Kamst, E., J. Bakkers, N. E. Quaedvlieg, J. Pilling, J. W. Kijne, B. J. Lugtenberg, and H. P. Spaink. 1999. Chitin oligosaccharide synthesis by rhizobia and zebrafish embryos starts by glycosyl transfer to O4 of the reducing-terminal residue. Biochemistry 38:4045-4052.

Kaneko, T., Y. Nakamura, S. Sato, E. Asamizu, T. Kato, S. Sasamoto, A. Watanabe, K. Idesawa, A. Ishikawa, K. Kawashima, T. Kimura, Y. Kishida, C. Kiyokawa, M. Kohara, M. Matsumoto, A. Matsuno, Y. Mochizuki, S. Nakayama, N. Nakazaki, S. Shimpo, M. Sugimoto, C. Takeuchi, M. Yamada, and S. Tabata. 2000. Complete genome structure of the nitrogen-fixing symbiotic bacterium Mesorhizobium loti. DNA Research 7:331-338.

Kaneko, T., Y. Nakamura, S. Sato, K. Minamisawa, T. Uchiumi, S. Sasamoto, A. Watanabe, K. Idesawa, M. Iriguchi, K. Kawashima, M. Kohara, M. Matsumoto, S. Shimpo, H. Tsuruoka, T. Wada, M. Yamada, and S. Tabata. 2002. Complete genomic sequence of nitrogen-fixing symbiotic bacterium Bradyrhizobium japonicum USDA110. DNA Research 9:189-197.

Kannenberg, E. L., and N. J. Brewin. 1994. Host-plant invasion by Rhizobium: the role of cell-surface components. Trends in Microbiology 2:277-283.

Kannenberg, E. L., and R. W. Carlson. 2001. Lipid A and O-chain modifications cause Rhizobium lipopolysaccharides to become hydrophobic during bacteroid development. Molecular Microbiology 39:379-391.

Kato, T., T. Kaneko, S. Sato, Y. Nakamura, and S. Tabata. 2000. Complete structure of the chloroplast genome of a legume, Lotus japonicus. DNA Research 7:323-330.

Katznelson, H., and A. C. Zagallo. 1957. Metabolism of rhizobia in relation to effectiveness. Canadian Journal of Microbiology 3:879-884.

Keister, D. L. 1975. Acetylene reduction by pure cultures of Rhizobia. Journal of Bacteriology 123:1265-1268.

Keister, D. L., and W. R. Evans. 1976. Oxygen requirement for acetylene reduction by pure cultures of rhizobia. Journal of Bacteriology 127:149-153.

Khbaya, B., M. Neyra, P. Normand, K. Zerhari, and A. Filali-Maltouf. 1998. Genetic Diversity and Phylogeny of Rhizobia That Nodulate Acacia spp. in Morocco Assessed by Analysis of rRNA Genes. Applied and Environmental Microbiology 64:4912-4917.

Kiers, E. T., S. A. West, and R. F. Denison. 2002. Mediating mutualisms: Farm management practices and evolutionary changes in symbiont co-operation. Journal of Applied Ecology 39:745-754.

Kijne, J. W., M. A. Bauchrowitz, and C. L. Diaz. 1997. Root Lectins and Rhizobia. Plant Physiol 115:869-873.

Kim, J., and B. A. Salisbury. 2001. A tree obscured by vines: horizontal gene transfer and the median tree method of estimating species phylogeny. Pac Symp Biocomput:571-582.

Kirchner, O. 1896. Die Wurzelkn\"ollchen der Sojabohne. Beitr. Biol. Pflanz 7:213-224.

Kiss, E., and A. Kondorosi. 1997. Complete sequence of a Rhizobium plasmid carrying genes necessary for symbiotic association with the plant host. BioEssays 19:843-846.

Knapp05, s. 2005. Dispersal or Drift? More to Plant Biodiversity Than Meets the Eye. PLoS Biology 3:e43.

Knapp, M., K. St\"ockler, D. Havell, F. e. e. Delsuc, F. Sebastiani, and P. J. Lockhart. 2005. Relaxed Molecular Clock Provides Evidence for Long-Distance Dispersal of Nothofagus (Southern Beech). PLoS Biology 3:e14.

Knox, O. G. G., K. Killham, R. R. E. Artz, C. Mullins, and M. Wilson. 2004. Effect of Nematodes on Rhizosphere Colonization by Seed-Applied Bacteria. Applied and Environmental Microbiology 70:4666-4671.

Kobayashi, H., Y. Naciri-Graven, W. J. Broughton, and X. Perret. 2004. Flavonoids induce temporal shifts in gene-expression of nod-box controlled loci in Rhizobium sp. NGR234. Mol Microbiol 51:335-347.

Koonin, E. V., K. S. Makarova, and L. Aravind. 2001. Horizontal gene transfer in prokaryotes: quantification and classification. Annual Review of Microbiology 55:709-742.

Kurland, C. G., B. Canback, and O. G. Berg. 2003. Horizontal gene transfer: a critical view. Proceedings of the National Academy of Sciences of the United States of America 100:9658-9662.

Kuykendall, L. D., and G. H. Elkan. 1977. Some features of mannitol metabolism in Rhizobium japonicum. Journal of General Microbiology 98:291-295.

Kuykendall, L. D., Y. D. Gaur, and S. K. Dutta. 1993. Genetic diversity among \emph{Rhizobium} strains from \emph{Cicer arietinum} L. Letters in Applied Microbiology 17:259-263.

Kuykendall, L. D., and W. J. Hunter. 1997. The sequence of a symbiotically essential Bradyrhizobium japonicum operon consisting of trpD, trpC and moaC-like gene. Biochimica et Biophysica Acta 1350:277-281.

Kuykendall, L. D., B. Saxena, T. E. Devine, and S. E. Udell. 1992. Genetic diversity in Bradyrhizobium japonicum Jordan 1982 and a proposal for Bradyrhizobium elkanii sp. nov. Canadian Journal of Microbiology 38:501-505.

Kuykendall, L. D., J. M. Young, E. Mart\'inez-Romero, A. Kerr, and H. Sawada. 2005. Genus I. \emph{Rhizobium} Frank 1889, 338$^AL$. in Brenner, R. K. Krieg, Staley, and G. M. Garrity, editors. The Proteobacteria, Bergey's Manual of Systematic Bacteriology. Springer-Verlag, New York.

Kwon, S.-W., J.-Y. Park, Y.-H. Cho, G.-B. Lee, J.-S. Kim, J.-W. Kang, C.-K. Lim, and M. A. Parker. 2005. Phylogenetic analysis of the genera Bradyrhizobium, Mesorhizobium, Rhizobium and Sinorhizobium on the basis of 16S rRNA gene and internally transcribed spacer region sequences. International Journal of Systematic and Evolutionary Microbiology 55:263-270.

Lachman, J. 1891. \"Uber Knollen an den Wurzeln der Leguminosen. Biedermann's Zentralbl. Agric. 20:837-845.

Laeremans, T., C. Snoeck, J. Marien, C. Verreth, E. Mart\'inez-Romero, J. C. Prome, and J. Vanderleyden. 1999. Phaseolus vulgaris recognizes Azorhizobium caulinodans nod factors with a variety of chemical substituents. Molecular Plant-Microbe Interactions 12:820-824.

Laeremans, T., and J. Vanderleyden. 1998. Infection and nodulation signalling in Rhizobium-Phaseolus vulgaris symbiosis. World Journal of Microbiology \& Biotechnology 14:787-808.

Lafay, B., and J. J. Burdon. 1998. Molecular Diversity of Rhizobia Occurring on Native Shrubby Legumes in Southeastern Australia. Applied and Environmental Microbiology 64:3989-3997.

Lafay, B., and J. J. Burdon. 2001. Small-Subunit rRNA Genotyping of Rhizobia Nodulating Australian \emph{Acacia} spp. Applied and Environmental Microbiology 67:396-1427.

Lagares, A., D. F. Hozbor, K. Niehaus, A. J. L. P. Otero, J. Lorenzen, W. Arnold, and A. Puhler. 2001. Genetic Characterization of a Sinorhizobium meliloti Chromosomal Region Involved in Lipopolysaccharide Biosynthesis. Journal of Bacteriology 183:1248-1258.

Laguerre, G., P. Louvrier, M. R. Allard, and N. Amarger. 2003. Compatibility of rhizobial genotypes within natural populations of Rhizobium leguminosarum biovar viciae for nodulation of host legumes. Applied and Environmental Microbiology 69:2276-2283.

Laguerre, G., S. M. Nour, V. Macheret, J. Sanjuan, P. Drouin, and N. Amarger. 2001. Classification of rhizobia based on nodC and nifH gene analysis reveals a close phylogenetic relationship among Phaseolus vulgaris symbionts. Microbiology 147:981-993.

Laguerre, G., P. vanBerkum, N. Amarger, and D. Prevost. 1997. Genetic diversity of rhizobial symbionts isolated from legume species within the genera Astragalus, Oxytropis, and Onobrychis. Applied and Environmental Microbiology 63:4748-4758.

Laird, M. G. 1994. Geological aspects of the opening of the Tasman Sea. Evolution of the Tasman Sea Basin:1-17.

Laird, M. G., and J. D. Bradshaw. 2004. The break-up of a long-term relationship: The Cretaceous separation of New Zealand from Gondwana. Gondwana Research 7:273-286.

Laranjo, M., C. Branco, R. Soares, L. Alho, M. D. E. Carvalho, and S. Oliveira. 2002. Comparison of chickpea rhizobia isolates from diverse Portuguese natural populations based on symbiotic effectiveness and DNA fingerprint. Journal of Applied Microbiology 92:1043-1050.

Laranjo, M., J. Machado, J. P. W. Young, and S. Oliveira. 2004. High diversity of chickpea Mesorhizobium species isolated in a Portuguese agricultural region. Fems Microbiology Ecology 48:101-107.

Laranjo, M., R. Rodrigues, L. Alho, and S. Oliveira. 2001. Rhizobia of chickpea from southern Portugal: Symbiotic efficiency and genetic diversity. Journal of Applied Microbiology 90:662-667.

Larimer, F. W., P. Chain, L. Hauser, J. Lamerdin, S. Malfatti, L. Do, M. L. Land, D. A. Pelletier, J. T. Beatty, A. S. Lang, F. R. Tabita, J. L. Gibson, T. E. Hanson, C. Bobst, J. L. T. y. Torres, C. Peres, F. H. Harrison, J. Gibson, and C. S. Harwood. 2004. Complete genome sequence of the metabolically versatile photosynthetic bacterium \emph{Rhodopseudomonas palustris}. Nature Biotechnology 22:55-61.

Lavin, M., J. J. Doyle, and J. D. Palmer. 1990. Evolutionary significance of the loss of the chloroplast-DNA inverted repeat in the Leguminosae subfamily Papilionoideae. Evolution 44:390-402.

Lavin, M., B. P. Schrire, G. Lewis, R. T. Pennington, A. Delgado-Salinas, M. Thulin, C. E. Hughes, A. B. Matos, and M. F. Wojciechowski. 2004. Metacommunity process rather than continental tectonic history better explains geographically structured phylogenies in legumes. Philosophical Transactions of the Royal Society of London Series B Biological Sciences 359:1509-1522.

Lavin, M., M. F. Wojciechowski, P. Gasson, C. Hughes, and E. Wheeler. 2003. Phylogeny of robinioid legumes (Fabaceae) revisited: Coursetia and Gliricidia recircumscribed, and a biogeographical appraisal of the Caribbean endemics. Systematic Botany 28:387-409.

Lavin, M., M. F. Wojciechowski, A. Richman, J. Rotella, M. J. Sanderson, and A. B. Matos. 2001. Identifying tertiary radiations of fabaceae in the greater antilles: Alternatives to cladistic vicariance analysis. International Journal of Plant Sciences 162.

Lawrence, J. G., and H. Ochman. 2002. Reconciling the many faces of lateral gene transfer. Trends in Microbiology 10:1-4.

Leary, J. J. K., P. W. Singleton, and D. Borthakur. 2004. Canopy nodulation of the endemic tree legume \emph{Acacia koa} in the mesic forests of Hawaii. Ecology 85:3151-3157.

Leary, J. K., N. V. Hue, P. W. Singleton, and D. Borthakur. 2005. The major features of an infestation by the invasive weed legume gorse (\emph{Ulex europaeus}) on volcanic soils in Hawaii. Biology and Fertility of Soils in press.

Lechtova-Trnka, M. 1931. \'Etude sur les bact\'eries des l\'egumineuses et observations sur quelques champignons parasites des nodosit\'es. Botaniste 23.

Lee, A. T. 1948. The genus Swainsona. Contributions from the New South Wales National Herbarium 1:131-271.

Lee, D. E., W. G. Lee, and N. Mortimer. 2001. Where and why have all the flowers gone? Depletion and turnover in the New Zealand Cenozoic angiosperm flora in relation to palaeogeography and climate. Australian Journal of Botany 49:341-356.

Lee, W. K., T. Tokuoka, and K. Heo. 2004. Molecular evidence for the inclusion of the Korean endemic genus "Echinosophora" in Sophora (Fabaceae), and embryological features of the genus. Journal of Plant Research 117:209-219.

Legocki, R. P., and D. P. Verma. 1980. Identification of "nodule-specific" host proteins (nodoulins) involved in the development of rhizobium-legume symbiosis. Cell 20:153-163.

Levin, B. R., and C. T. Bergstrom. 2000. Bacteria are different: Observations, interpretations, speculations, and opinions about the mechanisms of adaptive evolution in prokaryotes. Proceedings of the National Academy of Sciences of the United States of America 97:6981-6985.

Lewis, K. 2000. Programmed Death in Bacteria. Microbiology and Molecular Biology Reviews 64:503-514.

Li, Y., Y. Bai, and W. Chen. 1999. Studies on DNA-DNA hybridization and 16S rDNA sequence of rhizobia isolated from Shapotou desert soil in Ningxia autonomous region of China. Wei sheng wu xue bao = Acta microbiologica Sinica 39:95-99.

Lieven-Antoniou, C. A., and T. S. Whittam. 1997. Specificity in the symbiotic association of Lotus corniculatus and Rhizobium loti from natural populations. Molecular Ecology 6:629-639.

Limpens, E., and T. Bisseling. 2003. Signaling in symbiosis. Current Opinion in Plant Biology 6:343-350.

Lindley, J. 1825. Botanical Register 11. t. 912 (publication page).

Lindstr\"om, K. 1989. \emph{Rhizobium galegae}, a new species of legume root nodule bacteria. International Journal of Systematic Bacteriology 39:365-367.

Lindstr\"om, K., M. Sarsa, J. Polkunen, and P. Kansanen. 1985. Symbiotic nitrogen fixation of Rhizobium (Galega) in acid soils, and its survival in soil under acid and cold stress. Plant \& Soil 87:293-302.

Lindstr\"om, K., Z. Terefework, L. Suominen, and G. Lortet. 2002. Signalling and development of Rhizobium-legume symbioses. Biology and Environment: Proceedings of the Royal Irish Academy, Section B 102.

Lira, M. D., A. S. T. Lima, J. R. F. Arruda, and D. L. Smith. 2005. Effect of root temperature on nodule development of bean, lentil and pea. Soil Biology \& Biochemistry 37:235-239.

Liston, A., and J. A. Wheeler. 1994. The phylogenetic position of the genus Astragalus (Fabaceae): Evidence from the chloroplast genes rpoC1 and rpoC2. Biochemical Systematics and Ecology 22:377-388.

Liu, J., T. W. En, and X. C. Wen. 2005. Diverse rhizobia associated with woody legumes Wisteria sinensis, Cercis racemosa and Amorpha fruticosa grown in the temperate zone of China. Systematic and applied microbiology 28:465-477.

Lobin, W., and W. Barthlott. 1988. Sophora toromiro (Leguminosae); the lost tree of Easter Island. Bot. Gard. Conserv. News 1:32-34.

Loh, J. T., and G. Stacey. 2001. Feedback regulation of the \emph{Bradyrhizobium japonicum} nodulation genes. Molecular Microbiology 41:1357-1364.

Loh, J. T., J. P. Y. Yuen-Tsai, M. G. Stacey, D. Lohar, A. Welborn, and G. Stacey. 2001. Population density-dependent regulation of the Bradyrhizobium japonicum nodulation genes. Molecular Microbiology 42:37-46.

Lohar, D. P., and K. A. VandenBosch. 2005. Grafting between model legumes demonstrates roles for roots and shoots in determining nodule type and host/rhizobia specificity. Journal of Experimental Botany 56:1643-1650.

Lopez-Garcia, S. L., T. E. Vazquez, G. Favelukes, and A. R. Lodeiro. 2002. Rhizobial position as a main determinant in the problem of competition for nodulation in soybean. Environ Microbiol 4:216-224.

Lopez-Lara, I. M., L. Blok-Tip, C. Quinto, M. L. Garcia, G. Stacey, G. V. Bloemberg, G. E. Lamers, B. J. Lugtenberg, J. E. Thomas-Oates, and H. P. Spaink. 1996. \emph{NodZ} of \emph{Bradyrhizobium} extends the nodulation host range of \emph{Rhizobium} by adding a fucosyl residue to nodulation signals. Molecular Microbiology 21:397-408.

Lopez-Lara, I. M., and O. Geiger. 2000. Expression and purification of four different rhizobial acyl carrier proteins. Microbiology 146 ( Pt 4):839-849.

Lorkiewicz, Z. 1997. Nodulation genes in the Rhizobium--plant signal exchange. Acta Biochimica Polonica 44:1-12.

Luckow, M., J. J. Doyle, R. Jobson, B. Pfeil, C. Hughes, S. Harris, B. Schrire, L. Rico, M. Lock, B. MacKinder, P. Winter, G. F. Smith, C. K. Willis, C. Fagg, R. Fortunato, J. Hurter, F. J. Breteler, J. G. Van Der Maesen, J. J. Wieringa, A. Bruneau, M. Caccavari, L. Craven, M. Crisp, S. Alfonso Delgado, H. M. Hern\'andez, M. Sousa S., S. Demissew, R. Grether, P. S. Herendeen, A. M. Hirsch, B. B. Klitgaard, J.-N. Labat, B. B. Simpson, J. Timberlake, A. E. Van Wyk, P. Vorster, and M. F. Wojciechowski. 2005. Acacia: The case against moving the type to Australia. Taxon 54:513-519.

Ludwig, R. A., and E. R. Signer. 1977. Glutamine synthetase control of nitrogen fixation in Rhizobia. Basic Life Sci 9:419-420.

Ludwig, W., R. Amann, E. Mart\'inez-Romero, W. Schonhuber, S. Bauer, A. Neef, and K. H. Schleifer. 1998. rRNA based identification and detection systems for rhizobia and other bacteria. Plant and Soil 204:1-19.

Ma, S.-W., and V. N. Iyer. 1990. New field isolates of Rhizobium leguminosarum biovar viciae that nodulate the primitive pea cultivar Afghanistan in addition to modern cultivars. Applied and Environmental Microbiology 56:2206-2212.

Ma, W., D. M. Penrose, and B. R. Glick. 2002. Strategies used by rhizobia to lower plant ethylene levels and increase nodulation. Canadian Journal of Botany 48:947-954.

Ma{\l}ek, W., and E. Sajnaga. 1999. Current taxonomy of the rhizobia. Acta Microbiologica Polonica 48:109-122.

MacKenzie, S. L., M. S. Lapp, and J. J. Child. 1979. Fatty acid composition of Rhizobium spp. Canadian Journal of Microbiology 25:68-74.

Macphail, M. K. 1997. Comment on M. Pole (1994): The New Zealand flora - Entirely long-distance dispersal? Journal of Biogeography 24:113-117.

Mao, C., J. A. Downie, and G. Hong. 1994. Two inverted repeats in the nodD promoter region are involved in nodD regulation in Rhizobium leguminosarum. Gene 145:87-90.

Marie, C., W. J. Broughton, and W. J. Deakin. 2001. Rhizobium type III secretion systems: legume charmers or alarmers? Current Opinion in Plant Biology 4:336-342.

Marin, V. A., K. R. S. Teixeira, and J. I. Baldani. 2003. Characterization of amplified polymerase chain reaction glnB and nifH gene fragments of nitrogen-fixing Burkholderia species. Letters in Applied Microbiology 36:77-82.

Markham, K. R., and E. J. Godley. 1972. Chemotaxonomic studies in \emph{Sophora} 1. An evaluation of \emph{Sophora microphylla} Aiton. New Zealand Journal of Botany 10:627-640.

Mart\'inez, E., R. Palacios, and F. S\'anchez. 1987. Nitrogen-fixing nodules induced by \emph{Agrobacterium tumefaciens} harboring \emph{Rhizobium phaseoli} plasmids. Journal of Bacteriology 169:2828-2834.

Mart\'inez-Romero, E. 1994. Recent Developments in Rhizobium Taxonomy. Plant and Soil 161:11-20.

Mart\'inez-Romero, E. 2003. Diversity of Rhizobium-Phaseolus vulgaris symbiosis: overview and perspectives. Plant and Soil 252:11-23.

Mart\'inez-Romero, E., and J. Caballero-Mellado. 1996. \emph{Rhizobium phylogenies} and bacterial genetic diversity. Critical reviews in plant sciences 15:113-140.

Mart\'inez-Romero, E., and B. D. W. Jarvis. 1993. International committee on systematic bacteriology subcommittee on the taxonomy of Agrobacterium and Rhizobium. International Journal of Systematic Bacteriology:622.

Mart\'inez-Romero, E., L. Segovia, F. M. Mercante, A. A. Franco, P. Graham, and M. A. Pardo. 1991. \emph{Rhizobium tropici}, a novel species nodulating \emph{Phaseolus vulgaris} L. beans and \emph{Leucaena} sp. trees. International Journal of Systematic Bacteriology 41:417-426.

Martyniuk, S., A. Wo\'zniakowska, M. Martyniuk, and J. Oro\'n. 2000. A new sand pouch-plant infection technique for enumeration of rhizobia in soil. Acta Societatis Botanicorum Poloniae 69:257-261.

Marvel, D. J., J. G. Torrey, and F. M. Ausubel. 1987. Rhizobium symbiotic genes required for nodulation of legume and nonlegume hosts. Proceedings of the National Academy of Sciences of the United States of America 84:1319-1323.

Mathesius, U. 2003. Conservation and divergence of signalling pathways between roots and soil microbes - The Rhizobium-legume symbiosis compared to the development of lateral roots, mycorrhizal interactions and nematode-induced galls. Plant and Soil 255:105-119.

Mathis, R., R. de Rycke, W. D'Haeze, E. Van Maelsaeke, E. Anthonio, M. Van Montagu, M. Holsters, D. Vereecke, and F. Van Gijsegem. 2005. Lipopolysaccharides as a communication signal for progression of legume endosymbiosis. Proceedings of the National Academy of Sciences of the United States of America 102:2655-2660.

Maunder, M., A. Culham, M. Maunder, A. Bordeu, J. Allainguillaume, and M. Wilkinson. 1999. Genetic diversity and pedigree for Sophora toromiro (Leguminosae): A tree extinct in the wild. Molecular Ecology 8:725-738.

McCallum, N. G. 1996. Genetic Diversity and Phylogeny of Native New Zealand Rhizobia. Honours Dissertation. University of Otago, Dunedin.

McDougall, I., B. J. J. Embleton, and D. B. Stone. 1981. Origin and evolution of Lord Howe Island, southwest Pacific Ocean. Journal of the Geological Society of Australia 28:155-176.

McGlone, M. S., R. P. Duncan, and P. B. Heenan. 2001. Endemism, species selection and the origin and distribution of the vascular plant flora of New Zealand. Journal of Biogeography 28:199-216.

McInroy, S. G., C. D. Campbell, K. E. Haukka, D. W. Odee, J. I. Sprent, W. J. Wang, J. P. W. Young, and J. M. Sutherland. 1999. Characterisation of rhizobia from African acacias and other tropical woody legumes using Biolog (TM) and partial 16S rRNA sequencing. FEMS Microbiology Letters 170:111-117.

McIver, J., M. A. Djordjevic, J. J. Weinman, G. L. Bender, and B. G. Rolfe. 1989. Extension of host range of \emph{Rhizobium leguminosarum} bv. \emph{trifolii} caused by point mutations in \emph{nodD} that result in alterations in regulatory function and recognition of inducer molecules. Molecular Plant Microbe Interactions 2:97-106.

Mears, A. D. 1959. Cotyledon colour: A useful measure for nodulation effectiveness. Rhizobium Newsletter 4:43-45.

Medrano-Soto, A., G. Moreno-Hagelsieb, P. Vinuesa, J. A. Christen, and J. Collado-Vides. 2004. Successful Lateral Transfer Requires Codon Usage Compatibility Between Foreign Genes and Recipient Genomes. Mol Biol Evol 21:1884-1894.

Mendel, G. 1865. Experiments in Plant Hybridization. in Natural History Society of Brunn in Bohemia.

Mercante, F. M., C. D. Cunha, R. Straliotto, J. Ribeiro, W. Q., J. Vanderleyden, and A. A. Franco. 1998. \emph{Leucaena leucocephala} as a trap-host for \emph{Rhizobium tropici} strains from the Brazilian ``Cerrado'' region. Revista De Microbiologia 29:49-58.

Mergaert, P., M. Van Montagu, and M. Holsters. 1997. Molecular mechanisms of Nod factor diversity. Mol Microbiol 25:811-817.

Michiels, J., B. Dombrecht, N. Vermeiren, C. W. Xi, E. Luyten, and J. Vanderleyden. 1998. Phaseolus vulgaris is a non-selective host for nodulation. Fems Microbiology Ecology 26:193-205.

Mildenhall, D. C. 1972. Fossil pollen of Acacai type from New Zealand. New Zealand Journal of Botany 10:485-494.

Mildenhall, D. C. 1989. Pleistocene spores and pollen from Central Otago, South Island, New Zealand. N. Z. Geol. Surv. Paleon. Bull. No, 59 59.

Mildenhall, D. C., and D. T. Pocknall. 1984. Palaeobotanical evidence for changes in Miocene and Pliocene climates in New Zealand.

Mildenhall, D. C., and D. T. Pocknall. 1989. Miocene-Pleistocene spores and pollen from Central Otago, South Island, New Zealand. New Zealand Geological Survey Paleontological Bulletin 59:1-128.

Miller, J. T., and R. J. Bayer. 2001. Molecular phylogenetics of Acacia (Fabaceae: Mimosoideae) based on the chloroplast MATK coding sequence and flanking TRNK intron spacer regions. American Journal of Botany 88:697-705.

Miller, K. J., and J. M. Wood. 1996. Osmoadaptation by Rhizosphere Bacteria. Annual Review of Microbiology 50:101-136.

Miller, M. B., and B. L. Bassler. 2001. Quorum Sensing in Bacteria. Annual Review of Microbiology 55:165-199.

Mills, K. K., and W. D. Bauer. 1985. Rhizobium attachment to clover roots. J Cell Sci Suppl 2:333-345.

Milovidov, P. F. 1928. Ein neuer Leguminosen-kn\"ollchenmikrob (\emph{Bacterium radicicola}

forma \emph{carmichaeliana}). Centralbl. Bakt. 2:333-345.

Mitchell, A. D., and P. B. Heenan. 2002. \emph{Sophora} sect. Edwardsia (Fabaceae): further evidence from nrDNA sequence data of a recent and rapid radiation around the Southern Oceans. Botan J Linn Soc 140:435-441.

Mithofer, A. 2002. Suppression of plant defence in rhizobia--legume symbiosis. Trends in plant science 7:440-444.

Mitra, R. M., S. L. Shaw, and S. R. Long. 2004. Six nonnodulating plant mutants defective for Nod factor-induced transcriptional changes associated with the legume-rhizobia symbiosis. Proceedings of the National Academy of Sciences of the United States of America 101:10217-10222.

Molouba, F., J. Lorquin, A. Willems, B. Hoste, E. Giraud, B. Dreyfus, M. Gillis, P. de Lajudie, and C. Masson-Boivin. 1999. Photosynthetic Bradyrhizobia from Aeschynomene spp. Are Specific to Stem-Nodulated Species and Form a Separate 16S Ribosomal DNA Restriction Fragment Length Polymorphism Group. Applied and Environmental Microbiology 65:3084-1427.

Moreira, F. M. S., K. Haukka, and J. P. W. Young. 1998. Biodiversity of rhizobia isolated from a wide range of forest legumes in Brazil. Molecular Ecology 7:889-895.

Morris, C. E., M. Bardin, H. Girardin, M.-H. Guinebreti\`ere, O. Berge, P. Frey-Klett, P. Lebaron, J. M. Thi\'ery, M. Troussellier, and N. Fromin. 2002. Microbial biodiversity: Approaches to experimental design and hypothesis testing in primary scientific literature from 1975 to 1999. Microbiology and Molecular Biology Reviews 66:592-616.

Moulin, L., G. Bena, C. Boivin-Masson, and T. St{\c e}pkowski 2004. Phylogenetic analyses of symbiotic nodulation genes support vertical and lateral gene co-transfer within the Bradyrhizobium genus. Molecular Phylogenetics and Evolution 30:720-732.

Moulin, L., A. Munive, B. Dreyfus, and C. Boivin-Masson. 2001. Nodulation of legumes by members of the beta-subclass of Proteobacteria. Nature 411:948-950.

Mullin, D., S. Minnich, L. S. Chen, and A. Newton. 1987. A set of positively regulated flagellar gene promoters in Caulobacter crescentus with sequence homology to the nif gene promoters of Klebsiella pneumoniae. Journal of molecular biology 195:939-943.

Murray, D. R. 1986. Seed dispersal by water. Seed Dispersal:49-85.

Musiyiwa, K., S. Mpepereki, K. E. Giller, and K. Musiyiwa. 2005. Symbiotic effectiveness and host ranges of indigenous rhizobia nodulating promiscuous soyabean varieties in Zimbabwean soils. Soil Biology and Biochemistry 37:1169-1176.

Mutch, L. A., and J. P. W. Young. 2004. Diversity and specificity of Rhizobium leguminosarum biovar viciae on wild and cultivated legumes. Molecular Ecology 13:2435-2444.

Mutch, L. A., J. P. W. Young, and S. M. Tamimi. 2003. Genotypic characterisation of rhizobia nodulating Vicia faba from the soils of Jordan: A comparison with UK isolates. Soil Biology and Biochemistry 35:709-714.

Neves, M. C. P., and N. G. Rumjanek. 1997. Diversity and adaptability of soybean and cowpea rhizobia in tropical soils. Soil Biology \& Biochemistry 29:889-895.

Ngom, A., Y. Nakagawa, H. Sawada, J. Tsukahara, S. Wakabayashi, T. Uchiumi, A. Nuntagij, S. Kotepong, A. Suzuki, S. Higashi, and M. Abe. 2004. A novel symbiotic nitrogen-fixing member of the Ochrobactrum clade isolated from root nodules of Acacia mangium. Journal of General and Applied Microbiology 50:17-28.

Nicholas, K. B., J. Nicholas, H. B., and I. Deerfield, D. W. 1997. GeneDoc: Analysis and visualization of genetic variation. EMBNEW News 4:14.

Nick, G., P. de Lajudie, B. D. Eardly, S. Suomalainen, L. Paulin, X. P. Zhang, M. Gillis, and K. Lindstr\"om. 1999. \emph{Sinorhizobium arboris} sp nov and \emph{Sinorhizobium kostiense} sp nov., isolated from leguminous trees in Sudan and Kenya. International Journal of Systematic Bacteriology 49:1359-1368.

Nienaber, A., H. Hennecke, and H. M. Fischer. 2001. Discovery of a haem uptake system in the soil bacterium Bradyrhizobium japonicum. Molecular Microbiology 41:787-800.

Nishimura, R., M. Ohmori, H. Fujita, and M. Kawaguchi. 2002. A Lotus basic leucine zipper protein with a RING-finger motif negatively regulates the developmental program of nodulation. Proceedings of the National Academy of Sciences of the United States of America 99:15206-15210.

Noreen, S., H. R. M. Schlaman, R. A. Bellog\'in, A. M. Buendia-Claveria, M. R. Espuny, M. Harteveld, C. Medina, F. J. Ollero, M. M. A. Olsthoorn, M. E. Soria-Diaz, H. P. Spaink, F. Temprano, J. Thomas-Oates, J. M. Vinardell, S. S. Yang, H. Y. Zhang, and J. E. Ru\'iz-Sainz. 2003. Alfalfa nodulation by Sinorhizobium fredii does not require sulfated Nod-factors. Functional Plant Biology 30:1219-1232.

Norris, D. O. 1965. \emph{Rhizobium} relationships in legumes. Pages 1087-1092 in Proceedings of the 9th International Grasslands Congress, S\~ao Paulo.

Norton, D. A., E. J. Godley, P. B. Heenan, and J. J. Ladley. 2002. Germination of Sophora seeds after prolonged storage. New Zealand Journal of Botany 40.

Nour, S. M., J.-C. Cleyet-Marel, D. Beck, A. Effosse, and M. P. Fernandez. 1994. Genotypic and phenotypic diversity of \emph{Rhizobium} isolated from chickpea (\emph{Cicer arietinum} L.). Canadian Journal of Microbiology 40:345-354.

Nour, S. M., J.-C. Cleyet-Marel, P. Normand, and M. P. Fernandez. 1995. Genomic heterogeneity of strains nodulating chickpeas (\emph{Cicer arietinum} L.) and description of \emph{Rhizobium mediterraneum} sp. nov. International Journal of Systematic Bacteriology 45:640-648.

Nour, S. M., M. P. Fernandez, P. Normand, and J.-C. Cleyet-Marel. 1994. \emph{Rhizobium ciceri} sp. nov., consisting of strains that nodulate chickpeas (\emph{Cicer arietinum} L.). International Journal of Systematic Bacteriology 44:511-522.

Novikova, N. I. 1996. Modern concepts of the phylogeny and taxonomy of nodule bacteria. Microbiology 65:383-394.

Nutman, P. S., and R. Hearne. 1979. Persistence of nodule bacteria in soil under long-term cereal cultivation. Rothamsted Raport for 1979:77-90.

Obaton, M., A. Bouniols, G. Piva, and V. Vadez. 2002. Are Bradyrhizobium japonicum stable during a long stay in soil? Plant and Soil 245:315-326.

O'Callahan, K. J., M. R. Davey, and E. C. Cocking. 1997. Xylem colonization of the legume Sesbania rostrata by Azorhizobium caulinodans. Proc R Soc Lond B 264:1821-1826.

O'Gara, F., and K. T. Shanmugam. 1976. Regulation of nitrogen fixation by Rhizobia. Export of fixed N2 as NH+4. Biochimica et Biophysica Acta 437:313-321.

Ogasawara, M., T. Suzuki, I. Mutoh, K. Annapurna, N. K. Arora, Y. Nishimura, and D. K. Maheshwari. 2003. \emph{Sinorhizobium indiaense} sp nov and \emph{Sinorhizobium abri} sp nov isolated from tropical legumes, \emph{Sesbania rostrata} and \emph{Abrus precatorius}, respectively. Symbiosis 34:53-68.

O'Hara, G. W. 1998. The Role of Nitrogen Fixation in Crop Production. Journal of Crop Production 1:115-138.

Oke, V., and S. R. Long. 1999. Bacteroid formation in the Rhizobium-legume symbiosis. Current Opinion in Microbiology 2:641-646.

Oldroyd, G. E. D., and J. A. Downie. 2004. Calcium, kinases and nodulation signalling in legumes. Nature Reviews Molecular Cell Biology 5:566-576.

Oliver, W. R. B. 1928. The flora of the Waipaoa Series (Late Pliocene) of New Zealand. Transactions and Proceedings of the New Zealand Institute 59:287-303.

Olsthoorn, M. M., I. M. Lopez-Lara, B. O. Petersen, K. Bock, J. Haverkamp, H. P. Spaink, and J. E. Thomas-Oates. 1998. Novel branched nod factor structure results from alpha-(1-->3) fucosyl transferase activity: the major lipo-chitin oligosaccharides from Mesorhizobium loti strain NZP2213 bear an alpha-(1-->3) fucosyl substituent on a nonterminal backbone residue. Biochemistry 37:9024-9032.

Orgambide, G. G., S. Philip-Hollingsworth, R. I. Hollingsworth, and F. B. Dazzo. 1994. Flavone-enhanced accumulation and symbiosis-related biological activity of a diglycosyl diacylglycerol membrane glycolipid from Rhizobium leguminosarum biovar trifolii. Journal of Bacteriology 176:4338-4347.

Ott, T., J. T. van Dongen, C. Gu Nther, L. Krusell, G. Desbrosses, H. Vigeolas, V. Bock, T. Czechowski, P. Geigenberger, and M. K. Udvardi. 2005. Symbiotic leghemoglobins are crucial for nitrogen fixation in legume root nodules but not for general plant growth and development. Current Biology 15:531-535.

P\'erez-Fern\'andez, M. A., and B. B. Lamont. 2003. Nodulation and performance of exotic and native legumes in Australian soils. Australian Journal of Botany 51:543-553.

Pacios-Bras, C., Y. E. M. Van der Burgt, A. M. Deelder, P. Vinuesa, D. Werner, and H. P. Spaink. 2002. Novel lipochitin oligosaccharide structures produced by Rhizobium etli KIM5s. Carbohydrate Research 337:1191-1200.

Pai, J. G. B., and W. R. Graves. 1995. Seed source affects seedling development and nitrogen fixation of Maackia amurensis. J Environ Hortic 13:142-146.

Pandey, P., M. Sahgal, D. K. Maheswari, and B. N. Johri. 2004. Genetic diversity of rhizobia isolated from medicinal legumes growing in the sub-Himalayan region of Uttaranchal. Current Science 86:202-207.

Pankhurst, C. E., D. H. Hopcroft, and W. T. Jones. 1987. Comparative morphology and flavolan content of \emph{Rhizobium loti} induced effective and ineffective root nodules on \emph{Lotus} species, \emph{Leuceana leucocephala}, \emph{Carmichaelia flagelliformis}, \emph{Ornithopus sativus}, and \emph{Clianthus puniceus}. Canadian Journal of Microbiology 65:2676-2685.

Parker, M. A. 1999. Mutualism in metapopulations of legumes and rhizobia. American Naturalist 153.

Parker, M. A. 2001. Mutualism as a constraint on invasion success for legumes and rhizobia. Diversity and Distributions 7.

Parker, M. A. 2002. Bradyrhizobia from wild Phaseolus, Desmodium, and Macroptilium species in northern Mexico. Applied and Environmental Microbiology 68:2044-2048.

Parker, M. A., J. L. Doyle, and J. J. Doyle. 2004. Comparative phylogeography of Amphicarpaea legumes and their root-nodule symbionts in Japan and North America. Journal of Biogeography 31:425-434.

Parker, M. A., B. Lafay, J. J. Burdon, and P. van Berkum. 2002. Conflicting phylogeographic patterns in rRNA and nifD indicate regionally restricted gene transfer in Bradyrhizobium. Microbiology-Sgm 148:2557-2565.

Parker, M. A., and N. K. Peters. 2001. Rhizobitoxine production and symbiotic compatibility of Bradyrhizobium from Asian and North American lineages of Amphicarpaea. Canadian Journal of Microbiology 47:889-894.

Parker, M. A., and J. M. Spoerke. 1998. Geographic structure of lineage associations in a plant-bacterial mutualism. Journal of Evolutionary Biology 11:549-562.

Parniske, M. 2000. Intracellular accommodation of microbes by plants: a common developmental program for symbiosis and disease? Current Opinion in Plant Biology 3:320-328.

Parsons, M. J., P. Douglas, and J. McMillain. 1998. Current names for wild plants in New Zealand. Manaaki Whenua Press, Lincoln.

Patriarca, E. J., R. Tat\`e, S. Ferraioli, and M. Iaccarino. 2004. Organogenesis of Legume Root Nodules. International Review of Cytology 234:201-262.

Patrick, H. N., and W. L. Lowther. 1992. Response of Lotus corniculatus to inoculation and pelleting on a range of Otago tussock grassland environments. Proceedings of the New Zealand Grassland Association 54:105-109.

Pavlova, Z. B., and L. A. Lutova. 2000. Nodulation as a model for studying differentiation in higher plants. Russian Journal of Genetics 36:975-988.

Pe\~na, R. C., and B. K. Cassels. 1996. Phylogenetic relationships among Chilean \emph{Sophora species}. Biochemical Systematics and Ecology 24:725-733.

Pe\~na, R. C., L. Iturriaga, G. Montenegro, and B. K. Cassels. 2000. Phylogenetic and biogeographic aspects of Sophora sect. Edwardsia (Papilionaceae). Pacific Science 54:159-167.

Peixoto, L., A. Zavala, H. Romero, and H. Musto. 2003. The strength of translational selection for codon usage varies in the three replicons of Sinorhizobium meliloti. Gene 320:109-116.

Peng, G. X., Z. Y. Tan, E. T. Wang, B. Reinhold-Hurek, W. F. Chen, and W. X. Chen. 2002. Identification of isolates from soybean nodules in Xinjiang Region as Sinorhizobium xinjiangense and genetic differentiation of S. xinjiangense from Sinorhizobium fredii. International Journal of Systematic and Evolutionary Microbiology 52:457-462.

Peng, S., J. C. Biswas, J. K. Ladha, P. Gyaneshwar, and Y. Chen. 2002. Influence of rhizobial inoculation on photosynthesis and grain yield of rice. Agronomy Journal 94:925-929.

Perez-Ramirez, N. O., M. A. Rogel, E. Wang, J. Z. Castellanos, and E. Mart\'inez-Romero. 1998. Seeds of Phaseolus vulgaris bean carry Rhizobium etli. Fems Microbiology Ecology 26:289-296.

Perret, X., J. Parsons, V. Viprey, K. Reichwald, and W. J. Broughton. 2001. Repeated sequences of the genomes of Rhizobium sp. NGR234 and Sinorhizobium meliloti: A comparative analysis by shotgun sequencing

[Séquences re?pe?te?es des ge?nomes de Rhizobium sp. NGR234 et Sinorhizobium meliloti: Une analyse comparative par se?quenc?age ale?atoire]. Canadian Journal of Microbiology 47:548-558.

Perret, X., C. Staehelin, and W. J. Broughton. 2000. Molecular Basis of Symbiotic Promiscuity. Microbiology and Molecular Biology Reviews 64:180-201.

Pinero, D., E. Martinez, and R. K. Selander. 1988. Genetic diversity and relationships among isolates of Rhizobium leguminosarum biovar phaseoli. Applied and Environmental Microbiology 54:2825-2832.

Planet, P. J. 2002. Reexamining microbial evolution through the lens of horizontal transfer. Exs 92:247-303.

Pocknall, D. T. 1989. Late Ecocene to Early Miocene vegetation and climate history of New Zealand. Journal - Royal Society of New Zealand 19:1-18.

Pocknall, D. T., and D. C. Mildenhall. 1984. Late Oligocene - early Miocene spores and pollen from Southland, New Zealand. New Zealand Geological Survey Paleontological Bulletin 51.

Pole, M. 1989. Early Miocene floras from central Otago, New Zealand. Journal - Royal Society of New Zealand 19:121-125.

Pole, M. 1994. The New Zealand flora - Entirely long-distance dispersal? Journal of Biogeography 21:625-635.

Pole, M., and B. Douglas. 1999. Plant macrofossils of the Upper Cretaceous Kaitangata Coalfield, New Zealand. Australian Systematic Botany 12:331-364.

Pole, M. S. 1992. Fossils of Leguminosae from the Miocene Manuherikia Group of New Zealand. Advances in Legume Systematics: Part 4. The Fossil Record:251-258.

Pole, M. S. 2001. Can long-distance dispersal be inferred from the New Zealand plant fossil record? Australian Journal of Botany 49:357-366.

Pole, M. S., A. M. Holden, and J. D. Campbell. 1989. Fossil legumes from the Manuherikia Group (Miocene), Central Otago, New Zealand. Journal - Royal Society of New Zealand 19:225-228.

Polhill, R. M. 1981. Tribe 17. Carmichaeliae Hutch. (1964). Advances in Legume Systematics, Part I. Kew, Royal Botanic Gardens:364-366.

Polhill, R. M., P. H. Raven, and C. H. Stirton. 1981. Evolution and systematics of the Leguminosae. Royal Botanic Garden, Kew, England.

Pongsilp, N., N. Teaumroong, A. Nuntagij, N. Boonkerd, and M. J. Sadowsky. 2002. Genetic structure of indigenous non-nodulating and nodulating populations of Bradyrhizobium in soils from Thailand. Symbiosis 33:39-58.

Poole, A. M., D. T. Logan, and B.-M. Sjöberg. 2002. The evolution of the ribonucleotide reductases: Much ado about oxygen. Journal of Molecular Evolution 55:180-196.

Posada, D., and K. A. Crandall. 2001. Evaluation of methods for detecting recombination from DNA sequences: Computer simulations. Proceedings of the National Academy of Sciences of the United States of America 98:13757-13762.

Posada, D., and K. A. Crondall. 1998. Modeltest: testing the model of DNA substitution. Bioinformatics 14:817-818.

Potter, L. F. 1955. Isolation of rhizobia from preserved nodules. Applied Microbiology 3:160-161.

Prakash, R. K., R. A. Schilperoort, and M. P. Nuti. 1981. Large plasmids of fast-growing rhizobia: homology studies and location of structural nitrogen fixation (nif) genes. Journal of Bacteriology 145:1129-1136.

Prebble, M., and J. Shulmeister. 2002. An analysis of phytolith assemblages for the quantitative reconstruction of late Quaternary environments of the Lower Taieri Plain, Otago, South Island, New Zealand II. Paleoenvironmental reconstruction. Journal of Paleolimnology 27:415-427.

Prevost, D., P. Drouin, S. Laberge, A. Bertrand, J. Cloutier, and G. Levesque. 2003. Cold-adapted rhizobia for nitrogen fixation in temperate regions. Canadian Journal of Botany 81:1153-1161.

Prithiviraj, B., X. Zhou, A. Souleimanov, W. M. Khan, and D. L. Smith. 2003. A host-specific bacteria-to-plant signal molecule (Nod factor) enhances germination and early growth of diverse crop plants. Planta 216:437-445.

Provorov, N. A. 1996. Evolution of symbiotic genetic systems in rhizobia. Genetika 32:1029-1040.

Provorov, N. A. 1996. Coevolution of legumes and root nodule bacteria: Taxonomical and genetical aspects. Zhurnal Obshchei Biologii 57:52-78.

Provorov, N. A. 1998. Coevolution of rhizobia with legumes: Facts and hypotheses. Symbiosis 24:337-367.

Provorov, N. A. 1998. Review Article. Coevolution of rhizobia with legumes: Facts and hypotheses. Symbiosis 24:337-368.

Provorov, N. A. 2000. Population genetics of nodule bacteria. Zhurnal Obshchei Biologii 61:229-257.

Provorov, N. A., A. Y. Borisov, and I. A. Tikhonovich. 2002. Comparative genetics and evolutionary morphology of symbioses formed by plants with nitrogen-fixing microbes and endomycorrhizal fungi. Zhurnal Obshchei Biologii 63:451-472.

Provorov, N. A., A. Y. Borisov, and I. A. Tikhonovich. 2002. Developmental genetics and evolution of symbiotic structures in nitrogen-fixing nodules and arbuscular mycorrhiza. Journal of Theoretical Biology 214:215-232.

Provorov, N. A., and N. I. Vorob'ev. 1998. Population Genetics of Nodule Bacteria: Simulation of Cyclic Processes in Bacterial-Plant Systems. Russian Journal of Genetics 34:1455-1461.

Provorov, N. A., and N. I. Vorob'ev. 2000. Evolutionary genetics of nodule bacteria: Molecular and population aspects. Russian Journal of Genetics 36:1323-1335.

Provorov, N. A., and N. I. Vorobyov. 2000. Population genetics of rhizobia: construction and analysis of an "Infection and Release" model. J Theor Biol 205:105-119.

Provorov, N. A., and N. I. Vorobyov. 2003. Microevolution of nodule bacteria upon generation of mutants with altered survival in the plant-soil system. Russian Journal of Genetics 39:1349-1359.

Pryor, H. N., W. L. Lowther, R. M. Elliot, and C. W. Ronson. 2004. Effect of rhizobia from caucasian clover (Trifolium ambiguum) on nodulation and nitrogen fixation of white clover (Trifolium repens). New Zealand Journal of Agricultural Research 47:75-83.

Pueppke, S. G. 1996. The genetic and biochemical basis for nodulation of legumes by rhizobia. Critical Reviews in Biotechnology 16:1-51.

Pueppke, S. G., and W. J. Broughton. 1999. \emph{Rhizobium} sp. strain NGR234 and \emph{R. fredii} USDA257 share exceptionally broad, nested host ranges. Molecular Plant-Microbe Interactions 12:293-318.

Puhler, A., M. Arlat, A. Becker, M. Gottfert, J. P. Morrissey, and F. O'Gara. 2004. What can bacterial genome research teach us about bacteria-plant interactions? Current Opinion in Plant Biology 7:137-147.

Qian, J., and M. A. Parker. 2002. Contrasting \emph{nifD} and ribosomal gene relationships among \emph{Mesorhizobium} from \emph{Lotus oroboides} in Northern Mexico. Systematic and applied microbiology 25:68-73.

Quatrini, P., G. Scaglione, M. Cardinale, F. Caradonna, and A. M. Puglia. 2002. Bradyrhizobium sp. nodulating the Mediterranean shrub Spanish broom (Spartium junceum L.). Journal of Applied Microbiology 92:13-21.

R\"as\"anen, L. A., and K. Lindstr\"om. 1999. The effect of heat stress on the symbiotic interaction between Sinorhizobium sp. and Acacia senegal. Fems Microbiology Ecology 28:63-74.

Radeva, G., G. Jurgens, M. Niemi, G. Nick, L. Suominen, and K. Lindstr\"om. 2001. Description of two biovars in the \emph{Rhizobium galegae} species: Biovar orientalis and Biovar officinalis. Systematic and applied microbiology 24:192-205.

Ramey, B. E., C. Fuqua, M. Koutsoudis, and S. B. V. Bodman. 2004. Biofilm formation in plant-microbe associations. Current Opinion in Microbiology 7:602-609.

Randhawa, G. S., and A. Kumar. 2003. Milestones in the genetical research on rhizobia. Indian Journal of Experimental Biology 41:1095-1100.

Rao, A. V. 1976. Root exudation in relation to innoculation with rhizobia. Zentralbl Bakteriol Parasitenkd Infektionskr Hyg 131:79-82.

Rao, J. R., M. Fenton, and B. D. W. Jarvis. 1994. Symbiotic plasmid transfer in Rhizobium leguminosarum biovar trifolii and competition between the inoculant strain ICMP2163 and transconjugant soil bacteria. Soil Biology and Biochemistry:339-351.

Raven, P. H. 1973. Evolution of subalpine and alpine plant groups in New Zealand. New Zealand Journal of Botany 11:177-200.

Reeve, W., R. Tiwari, P. Worsley, M. Dilworth, A. Glenn, and J. Howieson. 1999. Constructs for insertional mutagenesis, transcriptional signal localization and gene regulation studies in root nodule and other bacteria. Microbiology 145:1307-1316.

Rezzonico, F., C. Binder, G. Défago, and Y. Moënne-Loccoz. 2005. The type III secretion system of biocontrol Pseudomonas fluorescens KD targets the phytopathogenic chromista Pythium ultimum and promotes cucumber protection. Molecular Plant-Microbe Interactions 18:991-1001.

Rice, D. J., P. Somasegaran, K. MacGlashan, and B. B. Bohlool. 1994. Isolation of insertion sequence ISRLdTAL1145-1 from a Rhizobium sp. (Leucaena diversifolia) and distribution of homologous sequences identifying cross-inoculation group relationships. Applied and Environmental Microbiology 60:4394-4403.

Richardson, D. M., N. Allsopp, C. M. D'Antonio, S. J. Milton, and M. Rejmanek. 2000. Plant invasions - The role of mutualisms. Biological Reviews of the Cambridge Philosophical Society 75:65-93.

Riely, B. K., J. M. Ane, R. V. Penmetsa, and D. R. Cook. 2004. Genetic and genomic analysis in model legumes bring Nod-factor signaling to center stage. Current Opinion in Plant Biology 7:408-413.

Ritsema, T., A. H. M. Wijfjes, B. J. J. Lugtenberg, and H. P. Spaink. 1996. Rhizobium nodulation protein NodA is a host-specific determinant of the transfer of fatty acids in Nod factor biosynthesis. Molecular and General Genetics 251:44-51.

Rivas, R., E. Vel\'azquez, A. Willems, N. Vizcaino, N. S. Subba-Rao, P. F. Mateos, M. Gillis, F. B. Dazzo, and E. Mart\'inez-Molina. 2002. A new species of Devosia that forms a unique nitrogen-fixing root-nodule symbiosis with the aquatic legume Neptunia natans (L.f.) Druce. Applied and Environmental Microbiology 68:5217-5222.

Rivas, R., E. Vel\'azquez, J. L. Zurdo-Pi\~neiro, P. F. Mateos, and E. Mart\'inez Molina. 2004. Identification of microorganisms by PCR amplification and sequencing of a universal amplified ribosomal region present in both prokaryotes and eukaryotes. Journal of Microbiological Methods 56:413-426.

Rivas, R., A. Willems, J. L. Palomo, P. Garcia-Benavides, P. F. Mateos, E. Mart\'inez-Molina, M. Gillis, and E. Vel\'azquez. 2004. Bradyrhizobium betae sp nov., isolated from roots of Beta vulgaris affected by tumour-like deformations. International Journal of Systematic and Evolutionary Microbiology 54:1271-1275.

Rivas, R., A. Willems, N. S. Subba-Rao, P. F. Mateos, F. B. Dazzo, R. M. Kroppenstedt, E. Mart\'inez-Molina, M. Gillis, and E. Vel\'azquez. 2003. Description of Devosia neptuniae sp nov that nodulates and fixes nitrogen in symbiosis with Neptunia natans, an aquatic legume from India. Systematic and applied microbiology 26:47-53.

Robertson, J. G., P. Lyttleton, S. Bullivant, and G. F. Grayston. 1978. Membranes in lupin root nodules. I. The role of Golgi bodies in the biogenesis of infection threads and peribacteroid membranes. J Cell Sci 30:129-149.

Robertson, J. G., B. Wells, N. J. Brewin, E. Wood, C. D. Knight, and J. A. Downie. 1985. The legume-Rhizobium symbiosis: a cell surface interaction. J Cell Sci Suppl 2:317-331.

Roche. 2002. High Pure PCR Product Purification Kit, Instruction Manual, 2nd edition. Roche Applied Science.

Roche, P., F. Maillet, C. Plazanet, F. Debell\'e, M. Ferro, G. Truchet, J.-C. Prome, and J. D\'enarie. 1996. The common nodABC genes of Rhizobium meliloti are host-range determinants. Proceedings of the National Academy of Sciences of the United States of America 93:15305-15310.

Rock, J. F. 1920. The Leguminous Plants of Hawaii.

Rodr\'iguez-Echeverr\'ia, S., M. A. P\'erez-Fern\'andez, S. Vlaar, and T. Finnan. 2003. Analysis of the legume-rhizobia symbiosis in shrubs from central western Spain. Journal of Applied Microbiology 95:1367-1374.

Rodriguez, A., and L. Frioni. 2003. Characterization of rhizobia from native Uruguayan legume trees by the rep-PCR technique. Revista Argentina de Microbiologia 35.

Rodriguez-Llorente, I. D., J. Perez-Hormaeche, K. E. Mounadi, M. Dary, M. A. Caviedes, V. Cosson, A. Kondorosi, P. Ratet, and A. J. Palomares. 2004. From pollen tubes to infection threads: recruitment of Medicago floral pectic genes for symbiosis. Plant J 39:587-598.

Rogel, M. A., I. Hern\'andez-Lucas, L. D. Kuykendall, D. L. Balkwill, and E. Mart\'inez-Romero. 2001. Nitrogen-fixing nodules with \emph{Ensifer adhaerens} harboring \emph{Rhizobium tropici} symbiotic plasmids. Applied and Environmental Microbiology 67:3264-3268.

Rome, S., B. Brunel, J.-C. Cleyet-Marel, S. Rome, M. P. Fernandez, and P. Normand. 1996. \emph{Sinorhizobium medicae} sp. nov., isolated from annual \emph{Medicago} spp. International Journal of Systematic Bacteriology 46:972-980.

Ruiz, E., D. J. Crawford, T. F. Stuessy, F. Gonzalez, R. Samuel, J. Becerra, and M. Silva. 2004. Phylogenetic relationships and genetic divergence among endemic species of Berberis, Gunnera, Myrceugenia and Sophora of the Juan Fernandez Islands (Chile) and their continental progenitors based on isozymes and nrITS sequences. Taxon 53:321-332.

Sadowsky, M. J., and P. H. Graham. 1998. Soil biology of the Rhizobiaceae. The Rhizobiaceae:155-172.

Saeki, K., and H. Kouchi. 2000. The lotus symbiont, Mesorhizobium loti: Molecular genetic techniques and application. Journal of Plant Research 113:457-465.

Safronova, V. I., G. Piluzza, A. A. Belimov, and S. Bullitta. 2004. Phenotypic and genotypic analysis of rhizobia isolated from pasture legumes native of Sardinia and Asinara Island. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 85:115-127.

Sahgal, M., and B. N. Johri. 2003. The changing face of rhizobial systematics. Current Science 84:43-48.

Saito, A., H. Mitsui, R. Hattori, K. Minamisawa, and T. Hattori. 1998. Slow-growing and oligotrophic soil bacteria phylogenetically close to Bradyrhizobium japonicum. Fems Microbiology Ecology 25:277-286.

Saitou, N., and M. Nei. 1987. The neighbor-joining method: a new method for reconstructing phylogenetic trees. Molecular Biology and Evolution 4:406-425.

Sajnaga, E., and W. Ma{\l}ek. 2001. Numerical taxonomy of Sarothamnus scoparius rhizobia. Current Microbiology 42.

Sajnaga, E., W. Ma{\l}ek, B. {{\L}}otocka, T. St{\c e}pkowski , and A. Legocki. 2001. The root-nodule symbiosis between \emph{Sarothamnus scoparius} L. and its microsymbionts. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 79:385-391.

Salda\~na, G., V. Martinez-Alc\'antara, P. A. Balatti, J. M. Vinardell, R. Bellog\'in, and J. E. Ru\'iz-Sainz. 2003. Genetic diversity of fast-growing rhizobia that nodulate soybean (\emph{Glycine max} L. Merr). Archives of Microbiology 180:45-52.

Salema, M. P., C. A. Parker, D. K. Kidby, and D. L. Chatel. 1982. Death of rhizobia on inoculated seed. Soil Biology \& Biochemistry 14.

Samson, R., J. B. Legendre, R. Christen, W. Achouak, and L. Gardan. 2004. Transfer of Pectobacterium chrysanthemi (Brenner et al. 1973) Hauben et al. 1998 and Brenneria paradisiaca to the genus Dickeya gen. nov. as D. chrysanthemi comb. nov. and D. paradisiaca comb. nov. and delineation of four novel species: D. dadantii sp. nov., D. dianthicola sp. nov., D. dieffenbachiae sp. nov. and D. zeae sp. nov. International Journal of Systematic and Evolutionary Microbiology 54.

Sanderson, M. J. 1991. Phylogenetic relationships within North American \emph{Astragalus} L. (Fabaceae). Systematic Biology 16:414-430.

Sanderson, M. J., and A. Liston. 1995. Molecular phylogenetic systematics of Galegeae, with special reference to \emph{Astragalus}. Advances in Legume Systematics:331-350.

Sanderson, M. J., and M. F. Wojciechowski. 1996. Diversification rates in a temperate legume clade: Are there ``so many species'' of \emph{Astragalus} (Fabaceae)? American Journal of Botany 83:1488-1502.

Santamour, J., F. S., and L. G. H. Riedel. 1997. A new name for \emph{Sophora japonica}. Journal of Arboriculture 23:166-167.

Santos, M. A., M. Hungria, and M. A. T. Vargas. 1999. Characterization of soybean Bradyrhizobium strains adapted to the Brazilian savannas. Fems Microbiology Ecology 30:261-272.

Santos, R., D. Herouart, S. Sigaud, D. Touati, and A. Puppo. 2001. Oxidative burst in alfalfa-Sinorhizobium meliloti symbiotic interaction. Molecular Plant-Microbe Interactions 14:86-89.

Sarita, S., P. K. Sharma, U. B. Priefer, and J. Prell. 2005. Direct amplification of rhizobial nodC sequences from soil total DNA and comparison to nodC diversity of root nodule isolates. Fems Microbiology Ecology 54:1-11.

Sawada, H., L. D. Kuykendall, and J. M. Young. 2003. Changing concepts in the systematics of bacterial nitrogen-fixing legume symbionts. Journal of General and Applied Microbiology 49:155-179.

Scharff, A. M., H. Egsgaard, L. Rosendahl, and P. E. Hansen. 2003. Exploring symbiotic nitrogen fixation and assimilation in pea root nodules by in vivo 15N nuclear magnetic resonance spectroscopy and liquid chromatography-mass spectrometry. Plant Physiology 131:367-378.

Schauser, L., A. Roussis, J. Stiller, and J. Stougaard. 1999. A plant regulator controlling development of symbiotic root nodules. Nature 402:191-195.

Schlaman, H. R. M., B. Horvath, E. Vijgenboom, R. J. H. Okker, and B. J. J. Lugtenberg. 1991. Suppression of nodulation gene expression in bacteroids of Rhizobium leguminosarum biovar viciae. Journal of Bacteriology 173:4277-4287.

Schlaman, H. R. M., B. J. J. Lugtenberg, and R. J. H. Okker. 1992. The NodD protein does not bind to the promoters of inducible nodulation genes in extracts of bacteroids of Rhizobium leguminosarum biovar viciae. Journal of Bacteriology 174:6109-6116.

Schlaman, H. R. M., R. J. H. Okker, and B. J. J. Lugtenberg. 1992. Regulation of nodulation gene expression by NodD in rhizobia. Journal of Bacteriology 174.

Schloter, M., M. Lebuhn, T. Heulin, and A. Hartmann. 2000. Ecology and evolution of bacterial microdiversity. Fems Microbiology Reviews 24:647-660.

Schmidt, E. L., R. O. Bakole, and B. B. Bohlool. 1968. Fluorescent-antibody approach to study of rhizobia in soil. Journal of Bacteriology 95:1987-1992.

Schmitt, R. 2002. Sinorhizobial chemotaxis: a departure from the enterobacterial paradigm. Microbiology 148:627-631.

Schofield, P. R., and J. M. Watson. 1986. DNA sequence of Rhizobium trifolii nodulation genes reveals a reiterated and potentially regulatory sequence preceding nodABC and nodFE. Nucleic Acids Research 14:2891-2903.

Scholla, M. H., J. A. Moorefield, and G. H. Elkan. 1984. Deoxyribonucleic acid homology between fast-growing soybean nodulating bacteria and other rhizobia. International Journal of Systematic Bacteriology 34:283-286.

Scholla, M. H., J. A. Moorefield, and G. H. Elkan. 1990. DNA homology between species of the Rhizobia. Systematic and applied microbiology 13:288-294.

Schultze, M., and A. Kondorosi. 1995. What makes nodulation signals host-plant specific? Trends in Microbiology 3:370-372.

Schultze, M., and A. Kondorosi. 1996. The role of lipochitooligosaccharides in root nodule organogenesis and plant cell growth. Current Opinion in Genetics \& Development 6:631-638.

Schultze, M., and A. Kondorosi. 1996. The role of Nod signal structures in the determination of host specificity in the Rhizobium-legume symbiosis. World Journal of Microbiology and Biotechnology 12:137-149.

Schultze, M., and A. Kondorosi. 1998. Regulation of symbiotic root nodule development. Annual Review of Genetics 32:33-57.

Segovia, L., D. Pinero, R. Palacios, and E. Mart\'inez-Romero. 1991. Genetic structure of a soil population of nonsymbiotic \emph{Rhizobium leguminosarum}. Applied and Environmental Microbiology 57:426-433.

Segovia, L., J. P. W. Young, and E. Mart\'inez-Romero. 1993. Reclassification of American \emph{Rhizobium leguminosarum} biovar phaseoli type I strains as \emph{Rhizobium etli} sp. nov. International Journal of Systematic Bacteriology 43:374-377.

Seguin, P., P. H. Graham, C. C. Sheaffer, N. J. Ehlke, and M. P. Russelle. 2001. Genetic diversity of rhizobia nodulating Trifolium ambiguum in North America. Canadian Journal of Microbiology 47:81-85.

Seneviratne, G., and H. S. Jayasinghearachchi. 2003. Mycelial colonization by bradyrhizobia and azorhizobia. J Biosci 28:243-247.

Seneviratne, G., and H. S. Jayasinghearachchi. 2005. A rhizobial biofilm with nitrogenase activity alters nutrient availability in a soil. Soil Biology and Biochemistry 37:1975-1978.

Sessitsch, A., J. G. Howieson, X. Perret, H. Antoun, and E. Mart\'inez-Romero. 2002. Advances in Rhizobium research. Critical reviews in plant sciences 21:323-378.

Shamseldin, A. A. Y., P. Vinuesa, H. Thierfelder, and D. Werner. 2005. Rhizobium etli and Rhizobium gallicum nodulate Phaseolus vulgaris in Egyptian soils and display cultivar-dependent symbiotic efficiency. Symbiosis 38:145-161.

Shapiro, B., A. Rambaut, and A. J. Drummond. 2005. Choosing Appropriate Substitution Models for the Phylogenetic Analysis of Protein-Coding Sequences. Molecular Biology and Evolution:msj021.

Sharma, P. K., B. Neeru, and K. K. Kapoor. 2003. Mung bean - an inappropriate alternate host for rhizobia nodulating leguminous trees. Environment and Ecology 21.

Sharma, R. S., A. Mohmmed, V. Mishra, and C. R. Babu. 2005. Diversity in a promiscuous group of rhizobia from three \emph{Sesbania} spp. colonizing ecologically distinct habitats of the semi-arid Delhi region. Research in Microbiology 156:57-67.

Shatters, R. G., and M. L. Kahn. 1989. Glutamine synthetase II in Rhizobium: reexamination of the proposed horizontal transfer of DNA from eukaryotes to prokaryotes. J Mol Evol 29:422-428.

Shatters, R. G., J. E. Somerville, and M. L. Kahn. 1989. Regulation of glutamine synthetase II activity in Rhizobium meliloti 104A14. Journal of Bacteriology 171:5087-5094.

Shaw, W. B., and B. R. Burns. 1997. The ecology and conservation of the endangered endemic shrub, kowhai ngutukaka \emph{Clianthus puniceus} in New Zealand. Biological Conservation 81:233-245.

Shimshick, E. J., and R. R. Hebert. 1978. Adsorption of rhizobia to cereal roots. Biochem Biophys Res Commun 84:736-742.

Silva, C., L. E. Eguiarte, V. Souza, P. Vinuesa, and E. Mart\'inez-Romero. 2003. Rhizobium etli and Rhizobium gallicum nodulate common bean (Phaseolus vulgaris) in a traditionally managed milpa plot in Mexico: Population genetics and biogeographic implications. Applied and Environmental Microbiology 69:884-893.

Silvester, W. B. 1983. Analysis of Nitrogen Fixation in Forest Ecosystems. Pages 173-212 in J. M. Gordon and C. T. Wheeler, editors. Biological Nitrogen Fixation in Forest Ecosystems. Foundations and Applications. Martinus Nijhoff, The Hague.

Sindhu, S. S., and K. R. Dadarwal. 2000. Competition for nodulation among rhizobia in legume-Rhizobium symbiosis. Indian Journal of Microbiology 40:211-246.

Singh, P., and S. K. Mahna. 1998. Symbiosis in nitrogen-fixing Fabales trees of dry regions of Rajasthan: A review. Arid Soil Research and Rehabilitation 12:359-386.

Sivakumaran, S., B. D. W. Jarvis, and P. J. Lockhart. 1997. Identification of soil bacteria expressing a symbiotic plasmid from Rhizobium leguminosarum bv. trifolii. Canadian Journal of Microbiology:164-177.

Skerman, V. B. D., V. McGowan, and P. H. A. Sneath. 1980. Approved Lists of Bacterial Names. International Journal of Systematic Bacteriology 30:225-420.

Skyes, W. R., and E. J. Godley. 1968. Transoceanic Dispersal in \emph{Sophora} and other genera. Nature 218:495-496.

Slattery, J. F., and D. R. Coventry. 1999. Persistence of introduced strains of Rhizobium leguminosarum bv trifolii in acidic soils of north-eastern Victoria. Australian Journal of Experimental Agriculture 39:829-837.

So, R. B., J. K. Ladha, and J. P. W. Young. 1994. Photosynthetic Symbionts of Aeschynomene Spp Form a Cluster with Bradyrhizobia on the Basis of Fatty-Acid and Ribosomal-Rna Analyses. International Journal of Systematic Bacteriology 44:392-403.

Soberon-Chavez, G., R. Najera, H. Olivera, and L. Segovia. 1986. Genetic rearrangements of a Rhizobium phaseoli symbiotic plasmid. Journal of Bacteriology 167:487-491.

Sørensen, S. J., L. H. Hansen, M. Bailey, N. Kroer, and S. Wuertz. 2005. Studying plasmid horizontal transfer in situ: A critical review. Nature Reviews Microbiology 3:700-710.

Sousa, M. S., and V. E. Rudd. 1993. Revision del genero \emph{Styphnolobium} (Leguminosae:Papilionoideae:Sophoreae). Annals of the Missouri Botanical Garden 80:270-283.

Souza, V., and L. E. Eguiarte. 1997. Bacteria gone native vs. bacteria gone awry?: Plasmidic transfer and bacterial evolution. Proceedings of the National Academy of Sciences of the United States of America 94:5501-5503.

Spaink, H. P. 1995. The Molecular-Basis of Infection and Nodulation by Rhizobia - the Ins and Outs of Sympathogenesis. Annual Review of Phytopathology 33:345-368.

Spaink, H. P. 1996. Regulation of plant morphogenesis by lipo-chitin oligosaccharides. Critical reviews in plant sciences 15:559-582.

Spaink, H. P. 2000. Root Nodulation and Infection Factors Produced by Rhizobial Bacteria. Annual Review of Microbiology 54:257-288.

Sprent, J. I. 1994. Evolution and Diversity in the Legume-Rhizobium Symbiosis - Chaos Theory. Plant and Soil 161:1-10.

Sprent, J. I. 2002. Knobs, knots and nodules - the renaissance in legume symbiosis research. New Phytologist 153:2-16.

Squartini, A., P. Struffi, H. D\"oring, S. Selenska-Pobell, E. Tola, A. Giacomini, E. Vendramin, E. Vel\'azquez, P. F. Mateos, E. Mart\'inez-Molina, F. B. Dazzo, S. Casella, and M. P. Nuti. 2002. \emph{Rhizobium sullae} sp. nov. (formerly `\emph{Rhizobium hedysari}'), the root-nodule microsymbiont of \emph{Hedysarum coronarium} L. International Journal of Systematic and Evolutionary Microbiology 52:1267-1276.

St{\c e}pkowski , T., M. Czaplinska, K. Miedzinska, and L. Moulin. 2003. The variable part of the dnaK gene as an alternative marker for phylogenetic studies of rhizobia and related alpha Proteobacteria. Systematic and applied microbiology 26:483-494.

St{\c e}pkowski , T., and A. B. Legocki. 2001. Reduction of bacterial genome size and expansion resulting from obligate intracellular lifestyle and adaptation to soil habitat. Acta Biochimica Polonica 48:367-381.

St{\c e}pkowski , T., A. Swiderska, K. Miedzinska, M. Czaplinska, M. Swiderski, J. Biesiadka, and A. B. Legocki. 2003. Low sequence similarity and gene content of symbiotic clusters of Bradyrhizobium sp WM9 (Lupinus) indicate early divergence of "lupin'' lineage in the genus Bradyrhizobium. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 84:115-124.

Stacey, G. 1995. Bradyrhizobium japonicum nodulation genetics. FEMS Microbiology Letters 127:1-9.

Stackebrandt, E. 2003. The richness of prokaryotic diversity: There must be a species somewhere. Food Technology and Biotechnology 41:17-22.

Stackebrandt, E., W. Frederiksen, G. M. Garrity, P. A. D. Grimont, P. Kampfer, M. C. J. Maiden, X. Nesme, R. Rossello-Mora, J. Swings, H. G. Truper, L. Vauterin, A. C. Ward, and W. B. Whitman. 2002. Report of the ad hoc committee for the re-evaluation of the species definition in bacteriology. International Journal of Systematic and Evolutionary Microbiology 52:1043-1047.

Stevens, G., M. McGlone, and B. McCulloch. 1995. Prehistoric New Zealand, 2nd edition. Reed Books, Auckland.

Stiefkens, L. B., G. Bernardello, and G. J. Anderson. 2003. The karyotype of Sophora tetraptera (Fabaceae). New Zealand Journal of Botany 41:731-735.

Streit, W. R., R. A. Schmitz, X. Perret, C. Staehelin, W. J. Deakin, C. Raasch, H. Liesegang, and W. J. Broughton. 2004. An evolutionary hot spot: the pNGR234b replicon of Rhizobium sp. strain NGR234. Journal of Bacteriology 186:535-542.

Struffi, P., V. Corich, A. Giacomini, A. Benguedouar, A. Squartini, S. Casella, and M. P. Nuti. 1998. Metabolic properties, stress tolerance and macromolecular profiles of rhizobia nodulating Hedysarum coronarium. Journal of Applied Microbiology 84:81-89.

Stuurman, N., C. P. Bras, H. R. Schlaman, A. H. Wijfjes, G. Bloemberg, and H. P. Spaink. 2000. Use of green fluorescent protein color variants expressed on stable broad-host-range vectors to visualize rhizobia interacting with plants. Molecular Plant-Microbe Interactions 13:1163-1169.

Sugawara, H., J. Ma, S. Miyazaki, J. Shimura, and Y. Takishima. 1993. World Directory of Collections of Cultures of Microorganisms. 4th edn.

Sullivan, J. T., S. D. Brown, C. W. Ronson, and R. R. Yocum. 2001. The bio operon on the acquired symbiosis island of Mesorhizobium sp. strain R7A includes a novel gene involved in pimeloyl-CoA synthesis. Microbiology 147:1315-1322.

Sullivan, J. T., B. D. Eardly, P. van Berkum, and C. W. Ronson. 1996. Four unnamed species of nonsymbiotic rhizobia isolated from the rhizosphere of Lotus corniculatus. Applied and Environmental Microbiology 62:2818-2825.

Sullivan, J. T., H. N. Patrick, W. L. Lowther, D. B. Scott, and C. W. Ronson. 1995. Nodulating Strains of \emph{Rhizobium loti} Arise through Chromosomal Symbiotic Gene Transfer in the Environment. Proceedings of the National Academy of Sciences of the United States of America 92:8985-8989.

Sullivan, J. T., and C. W. Ronson. 1998. Evolution of rhizobia by acquisition of a 500-kb symbiosis island that integrates into a phe-tRNA gene. Proceedings of the National Academy of Sciences of the United States of America 95:5145-5149.

Sullivan, J. T., J. R. Trzebiatowski, R. W. Cruickshank, J. Gouzy, S. D. Brown, R. M. Elliot, D. J. Fleetwood, N. G. McCallum, U. Rossbach, G. S. Stuart, J. E. Weaver, R. J. Webby, F. J. De Bruijn, and C. W. Ronson. 2002. Comparative sequence analysis of the symbiosis island of Mesorhizobium loti strain R7A. Journal of Bacteriology 184:3086-3095.

Suominen, L., L. Paulin, S. Aimo, A. M. Saren, E. Tas, and K. Lindstr\"om. 1999. Identification of nodulation promoter (nod-box) regions of Rhizobium galegae. FEMS Microbiology Letters 177.

Suominen, L., C. Roos, G. Lortet, L. Paulin, and K. Lindstr\"om. 2001. Identification and structure of the \emph{Rhizobium galegae} common nodulation genes: evidence for horizontal gene transfer. Molecular Biology and Evolution 18:907-916.

Sutherland, J. M., S. G. McInroy, E. K. James, and T. Naisbitt. 1994. Nodule structure with special reference to the tribes Sophoreae, Genisteae, and Thermopsideae. Pages 41-55 in J. I. Sprent and D. McKey, editors. Advances In Legume Systematics 5: The Nitrogen Factor. Royal Botanic Gardens, Kew.

Sutra, L., R. Christen, C. Bollet, P. Simoneau, and L. Gardan. 2001. Samsonia erythrinae gen. nov., sp. nov., isolated from bark necrotic lesions of Erythrina sp., and discrimination of plant-pathogenic Enterobacteriaceae by phenotypic features. International Journal of Systematic and Evolutionary Microbiology 51:1291-1304.

Suzuki, A., M. Akune, M. Kogiso, Y. Imagama, K. Osuki, T. Uchiumi, S. Higashi, S. Y. Han, S. Yoshida, T. Asami, and M. Abe. 2004. Control of nodule number by the phytohormone abscisic Acid in the roots of two leguminous species. Plant Cell Physiolology 45:914-922.

Swelim, D. M., S. M. Abdel-Wahab, F. M. Hashem, L. D. Kuykendall, and N. I. Hegazi. 1997. Host specificity and phenotypic diversity of Rhizobium strains nodulating Leucaena, Acacia, and Sesbania in Egypt. Biology and Fertility of Soils 25:224-232.

Swensen, S. M., and B. C. Mullin. 1997. Phylogenetic relationships among actinorhizal plants. The impact of molecular systematics and implications for the evolution of actinorhizal symbioses. Physiologia Plantarum 99:565-573.

Sy, A., E. Giraud, P. Jourand, N. Garcia, A. Willems, P. de Lajudie, Y. Prin, M. Neyra, M. Gillis, C. Boivin-Masson, and B. Dreyfus. 2001. Methylotrophic Methylobacterium bacteria nodulate and fix nitrogen in symbiosis with legumes. Journal of Bacteriology 183:214-220.

Sy, A., E. Giraud, R. Samba, P. de Lajudie, M. Gillis, and B. Dreyfus. 2001. Nodulation of certain legumes of the genus Crotalaria by the new species Methylobacterium. Canadian Journal of Microbiology 47:503-508.

Sylla, S. N., R. T. Samba, M. Neyra, I. Ndoye, E. Giraud, A. Willems, P. de Lajudie, and B. Dreyfus. 2002. Phenotypic and genotypic diversity of rhizobia nodulating \emph{Pterocarpus erinaceus} and \emph{P. lucens} in Senegal. Systematic and applied microbiology 25:572-583.

Tajima, S., T. Hirashita, K. Yoshihara, M. Nomura, and A. Bhromsiri. 2000. Application of repetitive extragenic palindromic (REP)-PCR and enterobacterial repetitive intergenic consensus (ERIC)-PCR analysis to the identification and classification of Japan and thai local isolates of Bradyrhizobium japonicum, Shinorhizobium meliloti and Rhizobium leguminosarum. Soil Science and Plant Nutrition 46:241-247.

Tak, T., P. C. van Spronsen, J. W. Kijne, A. A. N. van Brussel, and K. J. M. Boot. 2004. Accumulation of lipochitin oligosaccharides and NodD-Activating compounds in an efficient plant-Rhizobium nodulation assay. Molecular Plant-Microbe Interactions 17:816-823.

Tan, Z., and W. Chen. 1997. Sequencing the 16S rDNA of representative strain of new rhizobial group and determining of its phylogenetic relationship. Wei sheng wu xue bao = Acta microbiologica Sinica 37:411-416.

Tan, Z., T. Hurek, P. Vinuesa, P. Muller, J. K. Ladha, and B. Reinhold-Hurek. 2001. Specific Detection of Bradyrhizobium and Rhizobium Strains Colonizing Rice (Oryza sativa) Roots by 16S-23S Ribosomal DNA Intergenic Spacer-Targeted PCR. Applied and Environmental Microbiology 67:3655-1427.

Tan, Z. Y., F. L. Kan, G. X. Peng, E. T. Wang, B. Reinhold-Hurek, and W. X. Chen. 2001. \emph{Rhizobium yanglingense} sp. nov., isolated from arid and semi-arid regions in China. International Journal of Systematic and Evolutionary Microbiology 51:909-914.

Tan, Z. Y., E. T. Wang, G. X. Peng, M. E. Zhu, E. Mart\'inez-Romero, and W. X. Chen. 1999. Characterization of bacteria isolated from wild legumes in the north-western regions of China. International Journal of Systematic Bacteriology 49:1457-1469.

Tan, Z. Y., X. D. Xu, E. T. Wang, J. L. Gag, E. MartinezRomero, and W. X. Chen. 1997. Phylogenetic and genetic relationships of Mesorhizobium tianshanense and related rhizobia. International Journal of Systematic Bacteriology 47:874-879.

Tavares, F., and A. Sellstedt. 2001. DNase-resistant DNA in the extracellular and cell wall-associated fractions of Frankia strains R43 and CcI3. Current Microbiology 42:168-172.

Terefework, Z., G. Lortet, L. Suominen, and K. Lindstr\"om. 2000. Molecular evolution of interactions between rhizobia and their legume hosts. in Prokaryotic nitrogen fixation: a model system for the analysis of a biological process.

Terefework, Z., G. Nick, K. Lindstr\"om, S. Suomalainen, and L. Paulin. 1998. Phylogeny of \emph{Rhizobium galegae} with respect to other rhizobia and agrobacteria. International Journal of Systematic Bacteriology 48:349-356.

Tewfik, M. S., M. N. Alaa el-Din, and Y. A. Hamdi. 1978. The correlation between the efficiency of rhizobia and nitrate reductase and dehydrogenase activities of cowpea nodules. Zentralbl Bakteriol Naturwiss 133:408-413.

Teyssier, C., H. Marchandin, and E. Jumas-Bilak. 2004. The alpha-proteobacteria displayed diverse and often unconventional life-styles. Canadian Journal of Microbiology 50:383-396.

Thies, J. E., E. M. Holmes, and A. Vachot. 2001. Application of molecular techniques to studies in Rhizobium ecology: a review. Australian Journal of Experimental Agriculture 41:299-319.

Thomas, M. B., and M. I. Spurway. 2001. Kowhai (Sophora species) and other nitrogen-fixing plants of New Zealand. International Plant Propagators' Society. Combined Proceedings of Annual Meetings 51:94-97.

Thomas-Oates, J., J. Bereszczak, E. Edwards, A. Gill, S. Noreen, J. C. Zhou, M. Z. Chen, L. H. Miao, F. L. Xie, J. K. Yang, Q. Zhou, S. S. Yang, X. H. Li, L. Wang, H. P. Spaink, H. R. M. Schlaman, M. Harteveld, C. L. D\'iaz, A. A. N. Van Brussel, M. Camacho, D. N. Rodr\'iguez-Navarro, C. Santamar\'ia, F. Temprano, J. M. Acebes, R. A. Bellog\'in, A. M. Buend\'ia-Claver\'ia, M. T. Cubo, M. R. Espuny, A. M. Gil, R. Guti\'errez, A. Hidalgo, F. J. L\'opez-Baena, N. Madinabeitia, C. Medina, F. J. Ollero, J. M. Vinardell, and J. E. Ru\'iz-Sainz. 2003. A catalogue of molecular, physiological and symbiotic properties of soybean-nodulating rhizobial strains from different soybean cropping areas of China. Systematic and applied microbiology 26:453-465.

Thompson, J. 1990. New species and new combinations in the genus Swainsona (Fabaceae) in New South Wales. Telopea 4:1-5.

Thompson, J. 1993. A revision of the genus Swainsona (Fabaceae). Telopea 5:427-584.

Thompson, J. D., F. Plewniak, F. Jeanmougin, T. J. Gibson, and D. G. Higgins. 1997. The CLUSTAL X windows interface: Flexible strategies for multiple sequence alignment aided by quality analysis tools. Nucleic Acids Research 25:4876-4882.

Thrall, P. H., J. J. Burdon, and M. J. Woods. 2000. Variation in the effectiveness of symbiotic associations between native rhizobia and temperate Australian legumes: interactions within and between genera. Journal of Applied Ecology 37.

Tian, C., Y. Zhong, J. Chen, and X. He. 2003. Effect of inoculation with ecto- and arbuscular mycorrhizae and Rhizobium on the growth and nitrogen fixation by black locust, Robinia pseudoacacia. New Forests 25:125-131.

Tighe, S. W., P. d. Lajudie, K. Dipietro, K. Lindstr\"om, G. Nick, and B. D. W. Jarvis. 2000. Analysis of cellular fatty acids and phenotypic relationships of Agrobacterium, Bradyrhizobium, Mesorhizobium, Rhizobium and Sinorhizobium species using the Sherlock Microbial Identification System. International Journal of Systematic and Evolutionary Microbiology 50.

Tlusty, B., P. V. Berkum, and P. H. Graham. 2005. Characteristics of the rhizobia associated with \emph{Dalea} spp. in the Ordway, Kellogg--Weaver Dunes, and Hayden prairies. Canadian Journal of Microbiology 51:15-23.

Toledo, I., L. Lloret, and E. Mart\'inez-Romero. 2003. \emph{Sinorhizobium americanus} sp nov., a new \emph{Sinorhizobium} species nodulating native \emph{Acacia} spp. in Mexico. Systematic and applied microbiology 26:54-64.

Trinick, M. J., C. A. Parker, and M. J. Palmer. 1983. Interactions of the microflora from nodulation problem and non-problem soils towards Rhizobium spp on agar culture. Soil Biology \& Biochemistry 15.

Triplett, E. W., and M. J. Sadowsky. 1992. Genetics of competition for nodulation of legumes. Annual Review of Microbiology 46:399-428.

Troxler, J., M. Zala, G. Défago, P. Azelvandre, and D. Haas. 1997. Conjugative transfer of chromosomal genes between fluorescent pseudomonads in the rhizosphere of wheat. Applied and Environmental Microbiology 63:213-219.

Trujillo, M. E., A. Willems, A. Abril, A.-M. Planchuelo, R. Rivas, D. Ludena, P. F. Mateos, E. Martinez-Molina, and E. Velazquez. 2005. Nodulation of \emph{Lupinus albus} by Strains of \emph{Ochrobactrum lupini} sp. nov. Applied and Environmental Microbiology 71:1318-1327.

Turk, D., and H. H. Keyser. 1992. Rhizobia that nodulate tree legumes: Specificity of the host for nodulation and effectiveness. Canadian Journal of Microbiology 38:451-460.

Turner, S. L., M. J. Bailey, A. K. Lilley, and C. M. Thomas. 2002. Ecological and molecular maintenance strategies of mobile genetic elements. Fems Microbiology Ecology 42:177-185.

Turner, S. L., K. A. L. Knight, and J. P. W. Young. 2002. Identification and analysis of rhizobial plasmid origins of transfer. Fems Microbiology Ecology 42:227-234.

Turner, S. L., and J. P. Young. 2000. The glutamine synthetases of rhizobia: phylogenetics and evolutionary implications. Molecular Biology and Evolution 17:309-319.

Turner, S. L., X. X. Zhang, F. D. Li, and P. W. Young. 2002. What does a bacterial genome sequence represent? Mis-assignment of MAFF 303099 to the genospecies Mesorhizobium loti. Microbiology-Sgm 148:3330-3331.

Uchiumi, T., T. Ohwada, M. Itakura, H. Mitsui, N. Nukui, P. Dawadi, T. Kaneko, S. Tabata, T. Yokoyama, K. Tejima, K. Saeki, H. Omori, M. Hayashi, T. Maekawa, R. Sriprang, Y. Murooka, S. Tajima, K. Simomura, M. Nomura, A. Suzuki, Y. Shimoda, K. Sioya, M. Abe, and K. Minamisawa. 2004. Expression Islands Clustered on the Symbiosis Island of the Mesorhizobium loti Genome. Journal of Bacteriology 186:2439-2448.

Ueda, T., Y. Suga, N. Yahiro, and T. Matsuguchi. 1995. Phylogeny of Sym plasmids of rhizobia by PCR-based sequencing of a nodC segment. Journal of Bacteriology 177:468-472.

Ulrich, A., and I. Zaspel. 2000. Phylogenetic diversity of rhizobial strains nodulating \emph{Robinia pseudoacacia} L. Microbiology 146:2997-3005.

Valverde, A., E. Velazquez, C. Gutierrez, E. Cervantes, A. Ventosa, and J.-M. Igual. 2003. \emph{Herbaspirillum lusitanum} sp. nov., a novel nitrogen-fixing bacterium associated with root nodules of \emph{Phaseolus vulgaris}. International Journal of Systematic and Evolutionary Microbiology 53:1979-1983.

van Berkum, P., D. Beyene, T. A. Campbell, G. Bao, and B. D. Eardly. 1998. \emph{Rhizobium mongolense} sp. nov. is one of three rhizobial genotypes identified which nodulate and form nitrogen-fixing symbioses with \emph{Medicago ruthenica} [(L.) Ledebour]. International Journal of Systematic Bacteriology 48:13-22.

van Berkum, P., Z. Terefework, L. Paulin, S. Suomalainen, K. Lindstr\"om, and B. D. Eardly. 2003. Discordant Phylogenies within the rrn Loci of Rhizobia. Journal of Bacteriology 185:2988-2998.

van der Holst, P. P., H. R. Schlaman, and H. P. Spaink. 2001. Proteins involved in the production and perception of oligosaccharides in relation to plant and animal development. Current Opinion in Structural Biology 11:608-616.

van Elsas, J. D., and M. J. Bailey. 2002. The ecology of transfer of mobile genetic elements. Fems Microbiology Ecology 42:187-197.

van Rhijn, P., and J. Vanderleyden. 1995. The Rhizobium-Plant Symbiosis. Microbiological Reviews 59:124-142.

van Spronsen, P. C., M. Gronlund, C. P. Bras, H. P. Spaink, and J. W. Kijne. 2001. Cell biological changes of outer cortical root cells in early determinate nodulation. Molecular Plant-Microbe Interactions 14:839-847.

van Spronsen, P. C., T. Tak, A. A. N. Van Brussel, J. W. Kijne, K. J. M. Boot, and A. M. M. Rood. 2003. Salicylic acid inhibits indeterminate-type nodulation but not determinate-type nodulation. Molecular Plant-Microbe Interactions 16:83-91.

van Wyk, B. E. 2003. The value of chemosystematics in clarifying relationships in the genistoid tribes of papilionoid legumes. Biochemical Systematics and Ecology 31:875-884.

Vandamme, P., and T. Coenye. 2004. Taxonomy of the genus \emph{Cupriavidus}: a tale of lost and found. International Journal of Systematic and Evolutionary Microbiology 54:2285-2289.

Vandamme, P., J. Goris, W. M. Chen, P. de Vos, and A. Willems. 2002. \emph{Burkholderia tuberum} sp. nov. and \emph{Burkholderia phymatum} sp. nov., nodulate the roots of tropical legumes. Systematic and applied microbiology 25:507-512.

Vandamme, P., B. Pot, M. Gillis, P. De Vos, K. Kersters, and J. Swings. 1996. Polyphasic taxonomy, a consensus approach to bacterial systematics. Microbiological Reviews 60:407-438.

Vel\'azquez, E., J. M. Cruz-Sanchez, P. F. Mateos, and E. Mart\'inez-Molina. 1998. Analysis of stable low-molecular-weight RNA profiles of members of the family Rhizobiaceae. Applied and Environmental Microbiology 64:1555-1559.

Vel\'azquez, E., J. M. Igual, A. Willems, M. P. Fern\'adez, E. Mu\~noz, P. F. Mateos, A. Abril, N. Toro, P. Normand, E. Cervantes, M. Gillis, and E. Mart\'inez-Molina. 2001. \emph{Mesorhizobium chacoense} sp nov., a novel species that nodulates \emph{Prosopis alba} in the Chaco Arido region (Argentina). International Journal of Systematic and Evolutionary Microbiology 51:1011-1021.

Vel\'azquez, E., E. Mart\'inez-Romero, D. N. Rodriguez-Navarro, M. E. Trujillo, A. Daza, P. F. Mateos, E. Martinez-Molina, and P. van Berkum. 2001. Characterization of Rhizobial Isolates of Phaseolus vulgaris by Staircase Electrophoresis of Low-Molecular-Weight RNA. Applied and Environmental Microbiology 67:1008-1010.

Verghis, T. I., B. A. McKenzie, and G. D. Hill. 1999. Phenological development of chickpeas (Cicer arietinum) in Canterbury, New Zealand. New Zealand Journal of Crop and Horticultural Science:249-256.

Verma, S. C., S. P. Chowdhury, and A. K. Tripathi. 2004. Phylogeny based on 16S rDNA and nifH sequences of Ralstonia taiwanensis strains isolated from nitrogen-fixing nodules of Mimosa pudica, in India. Canadian Journal of Botany 50:313-322.

Vessey, J. K., K. Pawlowski, and B. Bergman. 2005. Root-based N$_2$ fixing symbioses: Legumes, actinorhizal plants, \emph{Parasponia} sp. and cycads. Plant and Soil 266:205-230.

Vincent, J. M. 1970. A manual for the Practical Study of the Root-Nodule Bacteria. Blackwell Scientific Publications, London.

Vinuesa, P., J. L. Rademaker, F. J. de Bruijn, and D. Werner. 1998. Genotypic characterization of Bradyrhizobium strains nodulating endemic woody legumes of the Canary Islands by PCR-restriction fragment length polymorphism analysis of genes encoding 16S rRNA (16S rDNA) and 16S-23S rDNA intergenic spacers, repetitive extragenic palindromic PCR genomic fingerprinting, and partial 16S rDNA sequencing. Applied and Environmental Microbiology 64:2096-2104.

Vinuesa, P., C. Silva, E. Mart\'inez-Romero, M. J. Lorite, E. J. Bedmar, and M. L. Izaguirre-Mayoral. 2005. Molecular systematics of rhizobia based on maximum likelihood and Bayesian phylogenies inferred from rrs, \emph{atpD}, \emph{recA} and \emph{nifH} sequences, and their use in the classification of \emph{Sesbania} microsymbionts from Venezuelan wetlands. Systematic and applied microbiology 28:702-716.

Vinuesa, P., C. Silva, E. Mart\'inez-Romero, D. Werner, M. Le\'on-Barrios, A. Jarabo-Lorenzo, R. P\'erez-Galdona, and A. Willems. 2005. \emph{Bradyrhizobium canariense} sp. nov., an acid-tolerant endosymbiont that nodulates endemic genistoid legumes (Papilionoideae: Genisteae) from the Canary Islands, along with \emph{Bradyrhizobium japonicum} bv. genistearum, \emph{Bradyrhizobium} genospecies alpha and \emph{Bradyrhizobium} genospecies beta. International Journal of Systematic and Evolutionary Microbiology 55:569-575.

Vinuesa, P., C. Silva, D. Werner, and E. Mart\'inez-Romero. 2005. Population genetics and phylogenetic inference in bacterial molecular systematics: the roles of migration and recombination in Bradyrhizobium species cohesion and delineation. Molecular Phylogenetics and Evolution 34:29-54.

Viprey, V., X. Perret, and W. J. Broughton. 2000. Host-plant invasion by rhizobia. Subcellular biochemistry 33:437-456.

Vlassak, K. M., and J. Vanderleyden. 1997. Factors influencing nodule occupancy by inoculant rhizobia. Critical reviews in plant sciences 16:163-229.

Wackett, L. P. 2004. Rhizobia. An annotated selection of World Wide Web sites relevant to the topics in environmental microbiology. Environmental Microbiology 6:93-93.

Wagstaff, S. J., and I. Breitwieser. 2004. Phylogeny and classification of Brachyglottis (Senecioneae, Asteraceae): An example of a rapid species radiation in New Zealand. Systematic Botany 29:1003-1010.

Wagstaff, S. J., P. B. Heenan, and M. J. Sanderson. 1999. Classification, origins, and patterns of diversification in New Zealand Carmichaelinae (Fabaceae). American Journal of Botany 86:1346-1356.

Walker, S., W. G. Lee, and G. M. Rogers. 2003. The woody vegetation of Central Otago, New Zealand: Its present and past distribution and future restoration needs. Science for Conservation:5-82.

Walker, S. A., and J. A. Downie. 2000. Entry of Rhizobium leguminosarum bv. viciae into root hairs requires minimal nod factor specificity, but subsequent infection thread growth requires nodO or nodE. Molecular Plant-Microbe Interactions 13:754-762.

Wang, E. T., F. L. Kan, Z. Y. Tan, I. Toledo, W. X. Chen, and E. Mart\'inez-Romero. 2003. Diverse Mesorhizobium plurifarium populations native to Mexican soils. Archives of Microbiology 180:444-454.

Wang, E. T., M. A. Rogel, A. Garcia-de los Santos, J. Mart\'inez-Romero, M. A. Cevallos, and E. Mart\'inez-Romero. 1999. Rhizobium etli bv. mimosae, a novel biovar isolated from Mimosa affinis. International Journal of Systematic Bacteriology 49:1479-1491.

Wang, E. T., M. A. Rogel, X. H. Sui, W. X. Chen, E. Mart\'inez-Romero, and P. van Berkum. 2002. \emph{Mesorhizobium amorphae}, a rhizobial species that nodulates \emph{Amorpha fruticosa}, is native to American soils. Archives of Microbiology 178:301-305.

Wang, E. T., Z. Y. Tan, A. Willems, M. Fern\'andez-L\'opez, B. Reinhold-Hurek, and E. Mart\'inez-Romero. 2002. \emph{Sinorhizobium morelense} sp nov., a \emph{Leucaena leucocephala}-associated bacterium that is highly resistant to multiple antibiotics. International Journal of Systematic and Evolutionary Microbiology 52:1687-1693.

Wang, E. T., P. van Berkum, D. Beyene, X. H. Sui, O. Dorado, W. X. Chen, and E. Mart\'inez-Romero. 1998. \emph{Rhizobium huautlense} sp. nov., a symbiont of \emph{Sesbania herbacea} that has a close phylogenetic relationship with \emph{Rhizobium galegae}. International Journal of Systematic Bacteriology 48:687-699.

Wang, E. T., P. van Berkum, X. H. Sui, D. Beyene, W. X. Chen, and E. Mart\'inez-Romero. 1999. Diversity of Rhizobia associated with \emph{Amorpha fruticosa} isolated from Chinese soils and description of \emph{Mesorhizobium amorphae} sp nov. International Journal of Systematic Bacteriology 49:51-65.

Wang, S., and W. Chen. 1997. A study on taxonomy of Rhizobia isolated from Astragalus sp. Wei sheng wu xue bao = Acta microbiologica Sinica 37:335-343.

Ward, L. J., E. S. Rockman, l. P. Bal, B. D. Jarvis, and D. B. Scott. 1989. Isolation and characterization of a Rhizobium loti gene required for effective nodulation of Lotus pedunculatus. Molecular Plant-Microbe Interactions:224-232.

Wardle, P. 1978. Origin of the New Zealand mountain flora, with special reference to trans-Tasman relationships. New Zealand Journal of Botany 16:535-550.

Wardle, P. 1991. Vegetation of New Zealand. Cambridge University Press, Cambridge.

Waters, J. K., and D. W. Emerich. 2000. Transport of metabolites to and from symbiosomes and bacteroids. in Prokaryotic nitrogen fixation: a model system for the analysis of a biological process.

Waters, J. K., B. L. Hughes, II, L. C. Purcell, K. O. Gerhardt, T. P. Mawhinney, and D. W. Emerich. 1998. Alanine, not ammonia, is excreted from N2-fixing soybean nodule bacteroids. Proceedings of the National Academy of Sciences of the United States of America 95.

Watt, M. S., P. W. Clinton, B. Richardson, A. C. Leckie, D. Whitehead, and E. G. Mason. 2003. Above-ground biomass accumulation and nitrogen fixation of broom (Cytisus scoparius L.) growing with juvenile Pinus radiata on a dryland site. Forest Ecology and Management:93-104.

Wdowiak, S., W. Ma{\l}ek, E. Sajnaga, B. Lotocka, T. St{\c e}pkowski , and A. Legocki. 2000. Symbiosis of Astragalus cicer with its microsymbionts: partial nodC gene sequence, host plant specificity, and root nodule structure. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 78:63-71.

Weaver, R. W., and L. R. Frederick. 1972. A new technique for most-probable-number counts of rhizobia. Plant Soil 36:219-222.

Webb, K. J., L. Skot, M. N. Nicholson, B. Jorgensen, and S. Mizen. 2000. Mesorhizobium loti increases root-specific expression of a calcium-binding protein homologue identified by promoter tagging in Lotus japonicus. Mol Plant Microbe Interact 13:606-616.

Wedlock, D. N., and B. D. W. Jarvis. 1986. DNA homologies between Rhizobium fredii, rhizobia that nodulate Galega sp., and other Rhizobium and Bradyrhizobium species. International Journal of Systematic Bacteriology:550-558.

Wei, G., W. Chen, and M. Zhu. 1999. A study on taxonomy of rhizobia isolated from Kummerwia sp. and Indigofera sp. Wei sheng wu xue bao = Acta microbiologica Sinica 39:387-395.

Wei, G., M. Zhu, and W. Chen. 2001. Analysis on 16S rDNA sequence of rhizobia isolated from Kummerowla sp. Wei sheng wu xue bao = Acta microbiologica Sinica 41:113-116.

Wei, G. H., W. X. Chen, and M. E. Zhu. 2000. Analysis of 16S rDNA sequence and DNA-DNA hybridization of rhizobia isolated from Indigofera sp. Yi Chuan Xue Bao 27:1027-1032.

Wei, G. H., Z. Y. Tan, M. E. Zhu, E. T. Wang, S. Z. Han, and W. X. Chen. 2003. Characterization of rhizobia isolated from legume species within the genera \emph{Astragalus} and \emph{Lespedeza} grown in the Loess Plateau of China and description of \emph{Rhizobium loessense} sp. nov. International Journal of Systematic and Evolutionary Microbiology 53:1575-1583.

Wei, G. H., E. T. Wang, Z. Y. Tan, M. E. Zhu, and W. X. Chen. 2002. Rhizobium indigoferae sp nov and Sinorhizobium kummerowiae sp nov., respectively isolated from Indigofera spp. and Kummerowia stipulacea. International Journal of Systematic and Evolutionary Microbiology 52:2231-2239.

Weidner, S., A. Puhler, and H. Kuster. 2003. Genomics insights into symbiotic nitrogen fixation. Current Opinion in Biotechnology 14:200-205.

Weir, B. S. 2004. Do symbiotic root bacteria affect legume weed invasion. in Weed Ecology Workshop, Auckland, New Zealand.

Weir, B. S., S. J. Turner, W. B. Silvester, D.-C. Park, and J. M. Young. 2004. Unexpectedly diverse \emph{Mesorhizobium} strains and \emph{Rhizobium leguminosarum} nodulate native legume genera of New Zealand, while introduced legume weeds are nodulated by \emph{Bradyrhizobium} species. Applied and Environmental Microbiology 70:5980-5987.

Weir, B. S., S. J. Turner, W. B. Silvester, D.-C. Park, and J. M. Young. 2004. [Abstract] The diversity of rhizobia nodulating woody legumes in New Zealand. Pages 72 in Microbes outside the square : New Zealand Microbiology Society Conference, Palmerston North, New Zealand, 17th -19th November 2004 : abstract book. [The Conference], Palmerston North.

Weir, B. S., S. J. Turner, W. B. Silvester, D.-C. Park, and J. M. Young. 2004. [Poster abstract] Rhizobia on the native and exotic legumes of New Zealand. Pages 96 in 14th International Congress on Nitrogen Fixation, Beijing, China, Oct 27 - Nov 1, 2004 : program and abstract book. [The Conference], Beijing.

Weir, B. S., S. J. Turner, W. B. Silvester, and J. M. Young. 2004. [Abstract] Unexpected diversity of rhizobia nodulating native and introduced legumes in New Zealand. Pages 212 in Microbial planet : sub-surface to space : 10th International Symposium of Microbial Ecology ISME-10, Cancun, Mexico, August 22-27, 2004 : book of abstracts. [The Conference], Cancun.

Weir, B. S., J. M. Young, W. B. Silvester, and S. J. Turner. 2003. [Poster abstract] Rhizobia associated with New Zealand legume flora. Pages 116-117 in MicroNZ 2003 : a combined annual scientific meeting and exhibition of the Australian and New Zealand Societies for Microbiology : art in science : the Edge - Aotea Centre, Auckland, New Zealand, 28 September - 2 October 2003 : final program and abstracts book. [The Conference].

Weiss, P. W., and I. R. Noble. 1984. Status of coastal dune communities invaded by Chrysanthemoides monilifera. Australian Journal of Ecology 9:93-98.

Wernegreen, J. J., E. E. Harding, and M. A. Riley. 1997. Rhizobium gone native: Unexpected plasmid stability of indigenous Rhizobium leguminosarum. Proceedings of the National Academy of Sciences of the United States of America 94:5483-5488.

Wernegreen, J. J., and M. A. Riley. 1999. Comparison of the evolutionary dynamics of symbiotic and housekeeping loci: A case for the genetic coherence of rhizobial lineages. Molecular Biology and Evolution 16:98-113.

Werner, D. 2004. Signalling in the rhizobia-legumes symbiosis. in Plant surface microbiology.

Werner, D., J. M. Barea, N. J. Brewin, J. E. Cooper, P. Katinakis, K. Lindstr\"om, F. O'Gara, H. P. Spaink, G. Truchet, and P. M\"uller. 2002. Project report: Symbiosis and defence in the interaction of plants with microorganisms. Symbiosis 32:83-104.

West, S. A., E. T. Kiers, E. L. Simms, and R. F. Denison. 2002. Sanctions and mutualism stability: why do rhizobia fix nitrogen? Proceedings of the Royal Society of London - Series B: Biological Sciences 269:685-694.

Wiener, P., S. Egan, and E. M. H. Wellington. 1998. Evidence for transfer of antibiotic-resistance genes in soil populations of streptomycetes. Molecular Ecology 7:1205-1216.

Willems, A., and M. D. Collins. 1993. Phylogenetic analysis of rhizobia and agrobacteria based on 16S rRNA gene sequences. International Journal of Systematic Bacteriology 43:305-313.

Willems, A., F. Doignon-Bourcier, J. Goris, R. Coopman, P. de Lajudie, P. De Vos, and M. Gillis. 2001. DNA-DNA hybridization study of Bradyrhizobium strains. International Journal of Systematic and Evolutionary Microbiology 51:1315-1322.

Willems, A., M. Fern\'andez-L\'opez, E. Munoz-Adelantado, J. Goris, P. De Vos, E. Mart\'inez-Romero, N. Toro, and M. Gillis. 2003. Description of new Ensifer strains from nodules and proposal to transfer Ensifer adhaerens Casida 1982 to Sinorhizobium as Sinorhizobium adhaerens comb. nov. Request for an Opinion. International Journal of Systematic and Evolutionary Microbiology 53:1207-1217.

Willems, A., B. Hoste, J. Tang, D. Janssens, and M. Gillis. 2001. Differences between subcultures of the Mesorhizobium loti type strain from different culture collections. Systematic and applied microbiology 24:549-553.

Wilson, J. K. 1939. The relationship between pollination and nodulation of the Leguminoseae. Journal of the American Society of Agronomy 31:159-170.

Wilson, J. K. 1939. Leguminous plants and their associated organisms. Cornell. Univ. Agric. Exp. Stn. Mem. 221:48.

Winkworth, R. C., A. W. Robertson, F. Ehrendorfer, and P. J. Lockhart. 1999. The importance of dispersal and recent speciation in the flora of New Zealand. J Biogeography 26:1323-1325.

Winkworth, R. C., S. J. Wagstaff, D. Glenny, and P. J. Lockhart. 2002. Plant dispersal N.E.W.S from New Zealand. Trends in Ecology and Evolution 17:514-520.

Wisniewski-Dye, F., and J. A. Downie. 2002. Quorum-sensing in Rhizobium. Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 81:397-407.

Wojciechowski, M. F., M. J. Sanderson, and J.-M. Hu. 1999. Evidence on the monophyly of Astragalus (Fabaceae) and its major subgroups based on nuclear ribosomal DNA ITS and chloroplast DNA trnL intron data. Systematic Botany 24:409-437.

Wolde-meskel, E., T. Berg, N. K. Peters, and A. Frostegard. 2004. Nodulation status of native woody legumes and phenotypic characteristics of associated rhizobia in soils of southern Ethiopia. Biology and Fertility of Soils 40:55-66.

Wolde-meskel, E., Z. Terefework, K. Lindstr\"om, and A. Frostegard. 2004. Metabolic and genomic diversity of rhizobia isolated from field standing native and exotic woody legumes in southern Ethiopia. Systematic and applied microbiology 27:603-611.

Wolde-meskel, E., Z. Terefework, K. Lindstr\"om, and A. Frostegard. 2004. Rhizobia nodulating African Acacia spp. and Sesbania sesban trees in southern Ethiopian soils are metabolically and genomically diverse. Soil Biology \& Biochemistry 36:2013-2025.

Wolska, K. I. 2003. Horizontal DNA transfer between bacteria in the environment. Acta Microbiologica Polonica 52:233-243.

Wong, F. C. Y., and J. C. Meeks. 2002. Establishment of a functional symbiosis between the cyanobacterium Nostoc punctiforme and the bryophyte Anthoceros punctatus requires genes involved in nitrogen control and initiation of heterocyst differentiation. Microbiology 148:315-323.

Xie, Z. P., C. Staehelin, H. Vierheilig, A. Wiemken, S. Jabbouri, W. J. Broughton, R. Vogeli-Lange, and T. Boller. 1995. Rhizobial Nodulation Factors Stimulate Mycorrhizal Colonization of Nodulating and Nonnodulating Soybeans. Plant Physiol 108:1519-1525.

Xu, L. M., C. Ge, Z. Cui, J. Li, and H. Fan. 1995. \emph{Bradyrhizobium liaoningense} sp. nov., Isolated from the root nodules of soybeans. International Journal of Systematic Bacteriology 45:706-711.

Yamamoto, S., H. Kasai, D. L. Arnold, R. W. Jackson, A. Vivian, and S. Harayama. 2000. Phylogeny of the genus Pseudomonas: intrageneric structure reconstructed from the nucleotide sequences of gyrB and rpoD genes. Microbiology 146:2385-2394.

Yan, A., and W. Chen. 2000. Phylogenetic analysis of two rhizobia new groups. Wei Sheng Wu Xue Bao 40:1-8.

Yan, A. M., E. T. Wang, F. L. Kan, Z. Y. Tan, X. H. Sui, B. Reinhold-Hurek, and W. X. Chen. 2000. Sinorhizobium meliloti associated with Medicago sativa and Melilotus spp. in arid saline soils in Xinjiang, China. International Journal of Systematic and Evolutionary Microbiology 50:1887-1891.

Yang, G.-P., F. Debell\'e, F. Maillet, J. D\'enari\'e, A. Savagnac, M. Ferro, O. Schiltz, D. Prom\'e, M. Treilhou, C. Vialas, J.-C. Prom\'e, and K. Lindstr\"om. 1999. Structure of the \emph{Mesorhizobium huakuii} and \emph{Rhizobium galegae} Nod factors: A cluster of phylogenetically related legumes are nodulated by rhizobia producing Nod factors with $\alpha$,$\beta$-unsaturated N-acyl substitutions. Molecular Microbiology 34:227-237.

Yao, Z., and W. Chen. 1999. Study on polyphasic taxonomy of rhizobia isolated from Lespedeza species. Wei sheng wu xue bao = Acta microbiologica Sinica 39:287-295.

Yao, Z. Y., F. L. Kan, E. T. Wang, G. H. Wei, and W. X. Chen. 2002. Characterization of rhizobia that nodulate legume species of the genus Lespedeza and description of Bradyrhizobium yuanmingense sp nov. International Journal of Systematic and Evolutionary Microbiology 52:2219-2230.

Yates, R. J., J. G. Howieson, K. G. Nandasena, and G. W. O'Hara. 2004. Root-nodule bacteria from indigenous legumes in the north-west of Western Australia and their interaction with exotic legumes. Soil Biology \& Biochemistry 36:1319-1329.

Yates, R. J., J. G. Howieson, D. Real, W. G. Reeve, A. Vivas-Marfisi, and G. W. O'Hara. 2005. Evidence of selection for effective nodulation in the Trifolium spp. symbiosis with Rhizobium leguminosarum biovar trifolii. Australian Journal of Experimental Agriculture 45:189-198.

Young, C. C., and K. T. Cheng. 1998. Genetic diversity of fast- and slow-growing soybean rhizobia determined by random amplified polymorphic DNA analysis. Biology and Fertility of Soils 26:254-256.

Young, J. M. 2001. Implications of alternative classifications and horizontal gene transfer for bacterial taxonomy. International Journal of Systematic and Evolutionary Microbiology 51:945-953.

Young, J. M. 2003. The genus name Ensifer Casida 1982 takes priority over Sinorhizobium Chen et al. 1988, and Sinorhizobium morelense Wang et al. 2002 is a later synonym of Ensfer adhaerens Casida 1982. Is the combination 'Sinorhizobium adhaerens' (Casida 1982) Willems et al. 2003 legitimate? Request for an Opinion. International Journal of Systematic and Evolutionary Microbiology 53:2107-2110.

Young, J. M. 2004. Renaming of Agrobacterium larrymoorei Bouzar and Jones 2001 as Rhizobium larrymoorei (Bouzar and Jones 2001) comb. nov. International Journal of Systematic and Evolutionary Microbiology 54:149-.

Young, J. M., L. D. Kuykendall, E. Mart\'inez-Romero, A. Kerr, and H. Sawada. 2001. A revision of \emph{Rhizobium} Frank 1889, with an emended description of the genus, and the inclusion of all species of \emph{Agrobacterium} Conn 1942 and \emph{Allorhizobium undicola} de Lajudie et al. 1998 as new combinations: \emph{Rhizobium radiobacter}, \emph{R. rhizogenes}, \emph{R. rubi}, \emph{R. undicola} and \emph{R. vitis}. International Journal of Systematic and Evolutionary Microbiology 51:89-103.

Young, J. M., L. D. Kuykendall, E. Mart\'inez-Romero, A. Kerr, and H. Sawada. 2003. Classification and nomenclature of Agrobacterium and Rhizobium - a reply to Farrand et al. (2003). International Journal of Systematic and Evolutionary Microbiology 53:1689-1695.

Young, J. M., D.-C. Park, and B. S. Weir. 2004. Diversity of 16S rDNA sequences of Rhizobium spp. implications for species determinations. FEMS Microbiology Letters 238:125-131.

Young, J. M., D.-C. Park, and B. S. Weir. 2004. [Poster abstract] Diversity of 16S rDNA sequences of Rhizobium spp. - implications for species determinations. Pages 129 in 14th International Congress on Nitrogen Fixation, Beijing, China, Oct 27 - Nov 1, 2004 : program and abstract book. [The Conference], Beijing.

Young, J. P. W. 1996. Phylogeny and taxonomy of rhizobia. Plant and Soil 186:45-52.

Young, J. P. W., and K. E. Haukka. 1996. Diversity and phylogeny of rhizobia. New Phytologist 133:87-94.

Zaat, S. A., J. Schripsema, C. A. Wijffelman, A. A. van Brussel, and B. J. Lugtenberg. 1989. Analysis of the major inducers of the Rhizobium nodA promoter from Vicia sativa root exudate and their activity with different nodD genes. Plant Molecular Biology 13:175-188.

Zahran, H. H. 1999. Rhizobium-Legume Symbiosis and Nitrogen Fixation under Severe Conditions and in an Arid Climate. Microbiology and Molecular Biology Reviews 63:968-989.

Zahran, H. H. 2001. Rhizobia from wild legumes: diversity, taxonomy, ecology, nitrogen fixation and biotechnology. Journal of Biotechnology 91:143-153.

Zahran, H. H., M. Abdel-Fattah, M. S. Ahmad, and A. Y. Zaky. 2003. Polyphasic taxonomy of symbiotic rhizobia from wild leguminous plants growing in Egypt. Folia Microbiol (Praha) 48:510-520.

Zakhia, F., and P. de Lajudie. 2001. Taxonomy of rhizobia. Agronomie 21:569-576.

Zakhia, F., H. Jeder, O. Domergue, A. Willems, J. C. Cleyet-Marel, M. Gillis, B. Dreyfus, and P. de Lajudie. 2004. Characterisation of wild legume nodulating bacteria (LNB) in the infra-arid zone of Tunisia. Systematic and applied microbiology 27:380-395.

Zerhari, K., J. Aurag, B. Khbaya, D. Kharchaf, and A. Filali-Maltouf. 2000. Phenotypic characteristics of rhizobia isolates nodulating \emph{Acacia} species in the arid and Saharan regions of Morocco. Letters in Applied Microbiology 30:351-357.

Zeze, A., L. A. Mutch, and J. P. Young. 2001. Direct amplification of \emph{nodD} from community DNA reveals the genetic diversity of \emph{Rhizobium leguminosarum} in soil. Environmental Microbiolology 3:363-370.

Zhang, F., and D. L. Smith. 2002. Interorganismal signaling in suboptimum environments: The legume -- rhizobia symbiosis. Advances in Agronomy 76:125-161.

Zhang, X., P. H. Graham, K. Lindstr\"om, G. Nick, S. Kaijalainen, Z. Terefework, L. Paulin, and S. W. Tighe. 1999. Phylogeny and diversity of \emph{Bradyrhizobium} strains isolated from the root nodules of peanut (\emph{Arachis hypogaea}) in Sichuan, China. Systematic and applied microbiology 22:378-386.

Zhang, X.-X., S. L. Turner, X.-W. Guo, H.-J. Yang, F. Debell\'e, G.-P. Yang, J. D\'enarie, J. P. W. Young, and F.-D. Li. 2000. The Common Nodulation Genes of \emph{Astragalus sinicus} Rhizobia Are Conserved despite Chromosomal Diversity. Applied and Environmental Microbiology 66:2988-1427.

Zhao, S., and K. P. Williams. 2002. Integrative genetic element that reverses the usual target gene orientation. Journal of Bacteriology 184:859-860.

Zheng, J. F., G. R. Liu, W. F. Zhu, Y. G. Zhou, and S. L. Liu. 2004. Phylogenetic clusters of rhizobia revealed by genome structures. Science in China Series C-Life Sciences 47:268-278.

Zhu, G., J. Zhou, and H. Chen. 1996. Behaviours of Exogenous Plasmids (Genes) in Peanut rhizobia. Acta Genetica Sinica 23:140-141.

Zou, X., F. Li, H. Chen, and X. Zou. 1997. Characteristics of plasmids in \emph{Rhizobium huakuii}. Current Microbiology 35:215-220.

Zulkarnain, Z., A. Taji, and N. Prakash. 2002. Chromosome number in \emph{Swainsona formosa} (Fabaceae). New Zealand Journal of Botany 40.