Medicago truncatulaMedicagoRoot Nodules, PlantMedicago sativaPlant RootsSinorhizobium melilotiPlant Root NodulationSymbiosisPlant ProteinsGene Expression Regulation, PlantNitrogen FixationGenes, PlantMycorrhizaeGenome, PlantFabaceaeMolecular Sequence DataLotusAphanomycesAmino Acid SequenceRhizobiumSinorhizobiumPlants, Genetically ModifiedDNA, PlantPlant LeavesSeedsRNA, PlantSyntenyPhylogenyLens PlantExpressed Sequence TagsIndoleacetic AcidsLupinusCytokininsPeas