Sinorhizobium melilotiSinorhizobiumMedicago sativaSymbiosisNitrogen FixationMedicago truncatulaBacterial ProteinsSinorhizobium frediiFlavinsMedicagoPlant Root NodulationGene Expression Regulation, BacterialRoot Nodules, PlantBacteriaRhizobiumGenes, BacterialRhizobiaceaePolysaccharides, BacterialPlant RootsMolecular Sequence DataRhizobium leguminosarumFabaceaeMelilotusDNA, BacterialLuteolinFlavin MononucleotideMutationMutagenesis, InsertionalGenome, BacterialSequence Analysis, DNAGenetic Complementation TestBase Sequence4-ButyrolactoneAgrobacterium tumefaciensGalactansAmino Acid SequencePlasmidsOperonDNA Transposable ElementsPhylogenyQuorum SensingBetaineHomogentisate 1,2-Dioxygenase