GS1 — Oryza sativa Indica Group

Summary

BGIOSGA005667 (GS1) on chromosome 2 of Indica rice encodes a glutamine synthetase (EC 6.3.1.2). The product belongs to the Gln_synt_N and Gln_synth_cat_dom families and is annotated with glutamine synthetase activity. GS1 is associated with nitrogen utilization, the ammonia assimilation cycle, nitrate assimilation, leaf senescence, and responses to abscisic acid and cadmium. It is linked to grain weight, grain length, grain yield, panicle weight, spikelet weight, protein content, starch grain synthesis, photosynthetic rate, and flowering time traits. The gene is also associated with salt, drought, and osmotic stress tolerance, as well as biotic and abiotic stress responses. Localization evidence places the product in the thylakoid, chloroplast envelope, stroma, apoplast, and plasmodesmata. Studies of related genes in other species link the family to nitrogen assimilation and biomass.