GS1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0613270 (GS1a) on barley chromosome 6H encodes a glutamine synthetase (EC 6.3.1.2). The gene is associated with nitrogen utilisation, the ammonia assimilation cycle, nitrate assimilation, photorespiration, and leaf senescence and development. It is linked to grain yield, grain filling period, protein content, chlorophyll content, photosynthetic rate, quantum yield, and photochemical quenching, as well as responses to salt, cadmium, and nitrate. The product localises to the thylakoid, chloroplast envelope and stroma, and the apoplast. Studies of related genes in other species connect the family to grain nitrogen content, flag leaf senescence, seedling vigour, and tolerance to drought and salt stress.