GLN — Beta vulgaris subsp. vulgaris

Summary

BVRB_001510 (GLN, gln2) in sugar beet encodes a glutamine synthetase (EC 6.3.1.2). The gene is associated with glutamine biosynthesis, nitrogen metabolism, and the ammonia assimilation cycle. It has been linked to leaf development and senescence, flowering time, photoperiod sensitivity, and responses to abscisic acid, cadmium, and blue light. Associations with starch grain synthesis, photosynthetic rate, respiration rate, and stomatal opening have also been noted. The encoded protein is predicted to localise to the chloroplast, thylakoid, and plastid, and is connected to nitrogen remobilisation, seed yield, seed germination, root development, and vegetative growth. Studies of related glutamine synthetase genes in other species link the family to nitrogen assimilation, biomass, senescence, and stress tolerance traits including cold and salinity tolerance.