GS1 — Triticum turgidum subsp. durum

Summary

TRITD6BV1G174320 (GS1) on durum wheat chromosome 6B encodes a glutamine synthetase (EC 6.3.1.2) with glutamine synthetase activity. The gene is associated with nitrogen metabolism, the ammonia assimilation cycle, nitrate assimilation, and leaf senescence. It has been linked to grain filling period, grain protein content, grain weight, grain size, photosynthetic rate, stomatal opening, flowering time, and abscisic acid sensitivity. Additional associations include starch grain synthesis, photoperiod-sensitive flowering, and responses to cadmium and blue light. The encoded protein is localized to the thylakoid, chloroplast envelope and stroma, apoplast, plant-type cell wall, vacuole, and plasmodesmata. Studies of related genes in other species connect the family to grain nitrogen content, seedling vigour, flag leaf senescence, and drought and salt stress responses.