Carbon 13 Metabolism C-4 photosynthesis Complex I Gene ontology Nitrate sensor Inhibition constant Absolute quantification Ammonium Mass spectrometry Nitrate Catalysis Carboxylation Database Elemental composition Necrosis Amino acid Polyamines Lolium perenne L Isotope Arabidopsis Lactuca sativa L biostimulant protein hydrolysate free amino acids water deficit polyamines osmoprotectants Proteomics Carbon isotopes Nitrate signaling Divergent selection Nutrients Biostimulant Metabolic flexibility Lotus japonicus Necrotrophic fungi Nitrate potassium necrotrophic fungi plant-pathogen relation CBL/CIPK jasmonic acid Class III peroxidases Kok method Class III peroxidase Climate change CBL/CIPK Gas chromatography Photosynthesis Foraminifera Metabolic pathways Bud burst Metabolomics Jasmonic acid Elevated CO2 C-4 plants Kunitz-type protease inhibitors Osmoprotectants Chlorophyll fluorescence Glucosinolates Electron transfer chain Glume Leaf respiration Nitrate uptake nitrate signaling symbiosis stress NRT1PTR NRT2 NPF family Omics Natural abundance Environmental parameters Auxin Ethylene Germination Estuary NRT2 High resolution Alternative Oxidase Carbon balance Awn Atmospheric CO2 15 N nitrate labelling Free amino acids NPF Nitrogen-15 Necrotrophic fungus Glutamate dehydrogenase heterozygous homozygous kernel yield maize metabolome mutant Mitochondrion Camalexin Mitochondria Mesophyll conductance Land carbon uptake Metabolic cycle Nitrate transporter Leaf day respiration Exact mass spectrometry Medicago truncatula Lactuca sativa L Aminotransferase Fluxes High light intensity Energy Kinetics Brassica napus oilseed rape Cytoplasmic male sterility Mitochondrial anatomy Glucosinolates Camalexin Small-sized samples Simultaneous extraction Absolute quantification Lipidomics Metabolome Nodules Cell wall Biomonitoring Image analysis Carbon stable isotope