Nitrogen CycleNitrogenPlant LeavesPlant RootsQuaternary Ammonium CompoundsNitrogen FixationPlants, Genetically ModifiedNitrogen CompoundsNitrificationDenitrificationPlant ProteinsCell CyclePlanctomycetalesAmmoniaNitrogen IsotopesGenes, PlantCrenarchaeotaArchaeaPlant ShootsAmmonium SulfateNitratesPlant ExtractsNitrite ReductasesAmmonium ChlorideNitritesPlants, MedicinalEcosystemAmmonium CompoundsPhylogenyPlant DevelopmentBacteriaSoilDNA, PlantSeawaterSoil MicrobiologyGenes, ArchaealOceans and SeasGeologic SedimentsNitrous OxideDNA, ArchaealOxidation-ReductionPlants, ToxicPlant CellsPlant StemsClimate ChangeAgricultureTreesArabidopsisGenome, PlantBiodiversityBlood Urea NitrogenNitrogen DioxidePlants, EdiblePlant StructuresOxidoreductasesMenstrual CycleMolecular Sequence DataPlant Growth RegulatorsReactive Nitrogen SpeciesArabidopsis ProteinsRNA, Ribosomal, 16SCarbonPII Nitrogen Regulatory ProteinsTobaccoAmmonium HydroxideAmino Acid SequencePlant ImmunityFertilizersCell Cycle ProteinsBiomassGenome, BacterialGlutamate-Ammonia LigaseNitrogen OxidesSymbiosisPlant EpidermisMutationAngiospermsSequence Analysis, DNAHydrogen-Ion ConcentrationBase SequenceSeedsPlant StomataAmino AcidsPhotosynthesisCitric Acid CycleUreaKineticsEstrous CycleZea maysPlant TranspirationBacterial ProteinsLycopersicon esculentumFabaceaeRoot Nodules, PlantModels, BiologicalFlowersGlutaminePlant PoisoningTime FactorsCulture Media