Sinorhizobium melilotiSinorhizobiumRhizobiumSymbiosisNitrogen FixationMedicago sativaMedicago truncatulaSinorhizobium frediiRhizobium leguminosarumBacterial ProteinsRhizobium etliBacteriaFabaceaePlant Root NodulationRhizobiaceaeRoot Nodules, PlantRhizobium tropiciMedicagoGenes, BacterialGene Expression Regulation, BacterialMolecular Sequence DataPlant RootsDNA, BacterialPlants, MedicinalPolysaccharides, BacterialRNA, Ribosomal, 16SBradyrhizobiumPhylogenySequence Analysis, DNAGram-Negative BacteriaGram-Positive BacteriaPhaseolusSoil MicrobiologyMutationBase SequencePlasmidsSoybeansDNA, RibosomalGenome, BacterialMelilotusBacteria, AnaerobicEscherichia coliGenetic Complementation TestAmino Acid SequenceMutagenesis, InsertionalSpecies SpecificityNitrogen IsotopesRNA, BacterialNitrogen CompoundsAgrobacterium tumefaciensNitrogen CycleDNA Transposable ElementsPhenotypeOperonCulture MediaCloning, MolecularCarbonLuteolinNitrogenaseNitrogen DioxideBlood Urea NitrogenSequence Homology, Amino AcidAlphaproteobacteriaSesbaniaPII Nitrogen Regulatory ProteinsIndigoferaAcacia