GS1 — Triticum turgidum subsp. durum

Summary

TRITD4BV1G145460 (GS1) on durum wheat chromosome 4B encodes a glutamine synthetase (EC 6.3.1.2). The gene is associated with nitrogen metabolism, the ammonia assimilation cycle, nitrate assimilation, leaf senescence, and responses to abscisic acid and cadmium. It has been linked to grain filling, grain protein content, grain weight, starch grain synthesis, photosynthetic rate, stomatal opening, flowering time, and photoperiod-sensitive flowering. Associations also include root development, seed development, germination, pollen viability, ammonium homeostasis, nitrogen remobilization, and vegetative growth. The product localizes to the chloroplast thylakoid membrane, chloroplast envelope, stroma, thylakoid, cytosolic ribosome, apoplast, plant-type cell wall, vacuole, and plasmodesmata. Studies of related genes in other species link the family to grain nitrogen content, seedling vigour, drought and salt stress tolerance, flag leaf senescence, and lateral root development.