GLN — Nicotiana attenuata

Summary

A4A49_60228 (GLN, GLNA) encodes a glutamine synthetase (EC 6.3.1.2). In coyote tobacco, this gene is associated with nitrate assimilation, the ammonia assimilation cycle, and amino acid biosynthesis. It has been linked to traits including photosynthetic rate, chlorophyll content, leaf senescence, flowering time, seed yield, root development, and responses to water, cadmium, and salt stress. The encoded protein is associated with multiple cellular compartments including the chloroplast thylakoid membrane, plastid, and apoplast, and is connected to processes such as leaf development, cell death, detoxification, and regulation of gene expression. Studies of related glutamine synthetase genes in other species link the family to nitrogen remobilization, ammonium homeostasis, biomass accumulation, and stress tolerance.