Sinorhizobium frediiSinorhizobiumSinorhizobium melilotiSymbiosisSoybeansFabaceaePlant Root NodulationGlycyrrhiza uralensisNitrogen FixationRhizobiumMedicago sativaPolysaccharides, BacterialGenes, BacterialBacterial ProteinsGene Expression Regulation, BacterialMolecular Sequence DataRhizobiaceaeMutationMedicagoMedicago truncatula