GLN — Daucus carota subsp. sativus

Summary

DcGLN (DCAR_010110) on carrot chromosome 3 encodes a protein with a Gln_synth/guanido_kin_cat_dom domain and annotated glutamine synthetase activity, as well as glutamate-tRNA ligase activity, histone acetyltransferase activity, and other molecular functions. This 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, and starch grain synthesis, as well as phenotypes such as seed yield, nitrogen remobilisation, ammonium metabolism, root development, and salt and cold stress tolerance. The product localises to multiple cellular compartments including the chloroplast thylakoid membrane, plastid, apoplast, and plant-type vacuole. Studies of related glutamine synthetase genes in other species connect the family to nitrogen assimilation, senescence, biomass, and photoperiodic flowering time.