Nitrogen CycleNitrogenNitrogen FixationNitrogen CompoundsPlant LeavesPlant RootsAtmosphereRoot Nodules, PlantSymbiosisBradyrhizobiumPlant Root NodulationPlants, Genetically ModifiedSoilNitrificationFabaceaeDenitrificationSinorhizobium melilotiEcosystemNitrogen IsotopesPlant ProteinsQuaternary Ammonium CompoundsCell CyclePlanctomycetalesGenes, PlantAmmoniaCrenarchaeotaPlant ShootsArchaeaNitratesBlood Urea NitrogenNitrogen DioxidePlant ExtractsBacterial ProteinsNitrite ReductasesNitritesPlants, MedicinalPlant DevelopmentReactive Nitrogen SpeciesPhylogenyBacteriaSoil MicrobiologySeawaterDNA, PlantGenes, ArchaealNitrous OxideOceans and SeasOxidation-ReductionGeologic SedimentsDNA, ArchaealPlants, ToxicAgriculturePlant StemsPlant CellsTreesClimate ChangeNitrogen OxidesPII Nitrogen Regulatory ProteinsArabidopsisCarbonBiodiversityGenome, PlantPlant StructuresFertilizersOxidoreductasesPlants, EdibleMolecular Sequence DataMenstrual CyclePlant Growth RegulatorsBiomassArabidopsis ProteinsRNA, Ribosomal, 16STobaccoGlutamate-Ammonia LigaseGenome, BacterialCell Cycle ProteinsPlant ImmunityAmino Acid SequenceUreaPhotosynthesisAngiospermsMutationBase SequenceAmino AcidsNitrogen Mustard CompoundsPlant EpidermisSequence Analysis, DNANitrogenasePoaceaeSeedsZea maysPlant StomataPlant TranspirationModels, BiologicalCitric Acid CycleGlutamineEstrous CycleTime FactorsSoybeansRhizobiumFlowers