GS2 — Oryza sativa Japonica

Summary

OsGS2 (GS2) on rice chromosome 4 encodes a glutamine synthetase (EC 6.3.1.2) with glutamine synthetase activity, along with annotated functions including glutamate-tRNA ligase, histone acetyltransferase, and SUMO transferase activities. In rice, GS2 is associated with responses to salt, drought, osmotic stress, and aluminum toxicity, as well as abiotic and biotic stress tolerance. The gene is linked to grain traits including grain thickness, width, length, weight, number, and yield, along with grain filling, appearance, and shape. Associations also include photosynthetic rate, chlorophyll content, leaf senescence, plant height, root length, flowering time, cold and heat tolerance, abscisic acid sensitivity, and osmotic adjustment capacity. GS2 is connected to processes such as ammonia assimilation, nitrate assimilation, photorespiration, glutathione metabolism, and auxin biosynthesis, and localizes to the chloroplast thylakoid, stroma, and envelope, as well as the apoplast and plasmodesmata.