Medicago truncatulaRhizobiumSymbiosisRhizobium leguminosarumRhizobium etliPlant Root NodulationRoot Nodules, PlantBacteriaNitrogen FixationFabaceaeSinorhizobiumSinorhizobium melilotiRhizobium tropiciBradyrhizobiumRhizobiaceaeMesorhizobiumMedicagoPlant RootsMedicago sativaPhaseolusPlants, MedicinalLotusMolecular Sequence DataMycorrhizaeBacterial ProteinsGenes, BacterialRNA, Ribosomal, 16SDNA, BacterialPhylogenyMimosaGram-Negative BacteriaGram-Positive BacteriaDNA, RibosomalAlphaproteobacteriaSoil MicrobiologyAzorhizobiumSequence Analysis, DNAAcaciaGene Expression Regulation, BacterialCannabaceaeBacteria, AnaerobicPeasSpecies SpecificitySinorhizobium frediiPlasmidsRNA, BacterialBase SequenceSoybeansEscherichia coliCaraganaAmino Acid SequencePlant ProteinsAgrobacteriumMutationPolysaccharides, BacterialGenetic Complementation TestCloning, MolecularPhenotypeBacteria, AerobicGenome, BacterialPlantsGene Expression Regulation, PlantGenes, rRNALipopolysaccharidesAzorhizobium caulinodansMutagenesis, InsertionalSympatryGenes, PlantDNA, Ribosomal SpacerSequence Homology, Amino AcidGene Transfer, HorizontalGram-Negative Aerobic BacteriaWater MicrobiologyBacterial Typing TechniquesCulture MediaPolymorphism, Restriction Fragment LengthCarbohydrate SequenceBase CompositionBurkholderiaDNA Transposable ElementsPlant EpidermisAnti-Bacterial AgentsNitrogenaseColony Count, MicrobialVicia sativaPolymerase Chain ReactionGram-Negative Anaerobic BacteriaBacterial Physiological PhenomenaSequence AlignmentPlants, Genetically ModifiedAgrobacterium tumefaciensNucleic Acid HybridizationCosmidsLeghemoglobinAerobiosisCytokininsAnaerobiosisDNA FingerprintingSequence Homology, Nucleic AcidTrifolium