GLN — Daucus carota subsp. sativus

Summary

DCAR_027142 (DcGLN) on carrot chromosome 8 encodes a protein with glutamine synthetase activity and contains glutamine synthetase catalytic and N-terminal domains. The gene is associated with the ammonia assimilation cycle, nitrate assimilation, leaf senescence, and responses to abscisic acid and cadmium. It has been linked to traits including photosynthetic rate, respiration rate, flowering time, starch grain synthesis, and stomatal opening. Associations also connect DcGLN to nitrogen remobilisation, seed yield, seed germination, root development, ammonium metabolism, and salt and cold stress tolerance. The encoded protein is localised to the chloroplast, thylakoid, plastid, and apoplast, and is linked to glutamine biosynthesis pathways. Related genes in other species link the family to lateral root development, ammonium tolerance, and circadian rhythm.