RhizobiumRhizobium leguminosarumRhizobiaceaeFabaceaeRhizobium etliRNA, Ribosomal, 16SPhylogenyDNA, Ribosomal SpacerDNA, RibosomalDNA, BacterialPlant RootsMolecular Sequence DataRhizobium tropiciNitrogen FixationSequence Analysis, DNASymbiosisSinorhizobium melilotiPlants, MedicinalRoot Nodules, PlantMedicago sativaPlant Root NodulationSinorhizobiumGenes, BacterialPhaseolusBradyrhizobiumBacterial ProteinsSpecies SpecificityMesorhizobiumBase CompositionBase SequencePlasmidsGenes, rRNAMedicagoAlphaproteobacteriaPolysaccharides, BacterialPeasBacterial Typing TechniquesNucleic Acid HybridizationRNA, BacterialGene Expression Regulation, BacterialMedicago truncatulaVicia sativaPlantsNitrogenaseSequence Homology, Nucleic AcidPhenotypeSoybeansFatty AcidsLeghemoglobinDNA Transposable ElementsMutationGenetic Complementation TestCosmidsSoil MicrobiologyTrifoliumLespedezaAmino Acid SequenceCloning, MolecularAgrobacterium tumefaciensTephrosiaViciaAcetyleneAcacia