Sinorhizobium melilotiMedicago truncatulaSymbiosisSinorhizobiumNitrogen FixationMedicago sativaBacteriaSinorhizobium frediiBacterial ProteinsPlant Root NodulationRoot Nodules, PlantRhizobiumMedicagoFabaceaeRhizobiaceaeBradyrhizobiumMolecular Sequence DataPlant RootsGram-Negative BacteriaGram-Positive BacteriaGene Expression Regulation, BacterialRhizobium leguminosarumRNA, Ribosomal, 16SDNA, BacterialGenes, BacterialPhylogenyMesorhizobiumBacteria, AnaerobicLotusSequence Analysis, DNAMycorrhizaeDNA, RibosomalSoil MicrobiologyPhaseolusRhizobium tropiciEscherichia coliRNA, BacterialPolysaccharides, BacterialGenome, BacterialBacteria, AerobicMimosaAlphaproteobacteriaBase SequenceRhizobium etliPlants, MedicinalAmino Acid SequenceSoybeansMutationAcaciaSpecies SpecificityAzorhizobiumPhenotypeCulture MediaGenes, rRNAPlant ProteinsGenetic Complementation TestWater MicrobiologyPlasmidsMutagenesis, InsertionalNitrogen IsotopesCloning, MolecularNitrogen CompoundsNitrogen CycleGram-Negative Aerobic BacteriaBacterial Physiological PhenomenaCarbonGram-Negative Anaerobic BacteriaSequence Homology, Amino AcidNitrogen DioxideAnti-Bacterial AgentsBlood Urea NitrogenGene Expression Regulation, PlantMelilotusSeawaterBase CompositionOperonProteobacteriaGene Transfer, HorizontalCannabaceaeLipopolysaccharidesAgrobacteriumColony Count, MicrobialSulfur-Reducing BacteriaBacterial Typing Techniques