GLN — Daucus carota subsp. sativus

Summary

DcGLN (DCAR_030389) on carrot chromosome 9 encodes a glutamine synthetase (EC 6.3.1.2). The gene is associated with the ammonia assimilation cycle, nitrate assimilation, leaf senescence, response to abscisic acid, and regulation of gene expression and DNA-templated transcription. It has been linked to traits including photosynthetic rate, respiration rate, flowering time, photoperiod-sensitive flowering, stomatal opening, starch grain synthesis, and hypocotyl morphology. Associations also include root development, root senescence, seed yield, seed germination, pollen viability, vegetative growth, rosette biomass, nitrogen remobilisation, ammonium metabolism and homeostasis, glutamate metabolism, salt and cold stress tolerance, and reactive oxygen species homeostasis. The product localises to the chloroplast thylakoid membrane, chloroplast envelope, stroma, plastid, thylakoid, apoplast, plant-type cell wall, plant-type vacuole, and cytosolic ribosome. Studies of related genes in other species link the family to lateral root development, ammonium tolerance, nitrogen assimilation, and photoperiodic flowering time.