Nitrogen FixationFlavonoidsNitrogenaseSymbiosisAcetyleneRoot Nodules, PlantRhizobiumSinorhizobium melilotiKaempferolsRhizobiaceaeQuercetinFixation, OcularNitrogen IsotopesGenes, BacterialLotusAzotobacterNitrogen CycleNitrogenPlant Root NodulationMedicago sativaRhizobium leguminosarumFlavanonesPII Nitrogen Regulatory ProteinsLuteolinFracture FixationBradyrhizobiumRhizobium etliPlant RootsBacterial ProteinsCyanotheceLeghemoglobinFlavonolsAzotobacter vinelandiiKlebsiella pneumoniaeGene Expression Regulation, BacterialCyanobacteriaFabaceaeFlavonesApigeninMedicago truncatulaAnabaenaComplement Fixation TestsTissue FixationPhaseolusHesperidinMolecular Sequence DataRutinGlutamate-Ammonia LigaseQuaternary Ammonium CompoundsNitrogen CompoundsPlant ExtractsOxidoreductasesAmmoniaDenitrificationCarbonPseudomonas stutzeriMesorhizobiumPlants, MedicinalBlood Urea NitrogenNitrogen DioxideChamomileMolybdoferredoxinMolybdenumBone ScrewsCarbon CycleSinorhizobiumDinitrogenase ReductasePlant LeavesPhotosynthesisGenes, ArchaealNitratesBacteriaSoybeansDNA, BacterialPhylogenyBase SequenceGluconacetobacterReactive Nitrogen SpeciesMutationBone PlatesPeasAzorhizobium caulinodansOperonPicratesAzospirillum brasilenseFrankiaIsopteraAchromobacterPhenolsOxidation-ReductionBiomassSeawaterSesbaniaRhodobacter capsulatusPlant ShootsCarbon DioxideAmino Acid SequenceExternal FixatorsFixativesEpimedium