BG1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0319100 (HvBG1) on barley chromosome 3H encodes a glycosyl hydrolase family 17 protein with glucan exo-1,3-beta-glucosidase, cellulase, lichenase and endo-1,3-beta-D-glucosidase activities. The gene is associated with 1,3-beta-glucan breakdown, carbohydrate metabolism, brassinosteroid-mediated signalling, defence responses to bacteria and fungi, and response to cold. It is linked to grain filling period, tiller number, starch and protein content, seed germination, and seedling growth and development traits. Associations include disease resistance, systemic acquired resistance, salt tolerance, osmotic stress response, dehydration resistance, callose deposition and biosynthesis, abscisic acid biosynthesis, phosphate acquisition, anthocyanin accumulation, and aphid susceptibility. The encoded protein localises to the apoplast, cell wall, vacuole, ER, Golgi, plasmodesmata, secretory vesicles and mitochondria. Studies of related genes in other species link the family to plasmodesmatal conductivity, callose degradation, and defence responses.