BG1 — Nicotiana attenuata

Summary

A4A49_12301 (BG1) on chromosome 9 of coyote tobacco encodes a glycosyl hydrolase family 17 protein with glucan exo-1,3-beta-glucosidase, endo-1,3-beta-D-glucosidase, lichenase and cellulase activities. The gene is associated with defence responses to nematodes and fungi, systemic acquired resistance, salicylic acid and ethylene anabolism, jasmonic acid and brassinosteroid signalling, response to water and cold, cell death, detoxification, embryogenesis, and carbohydrate metabolism. Its product localises to the apoplast, plant-type cell wall, vacuole, Golgi, secretory vesicle, mitochondria and cytosol. BG1 is associated with photosynthetic rate, quantum yield, transpiration rate, stomatal resistance, nitrate uptake, carbohydrate content, seed maturation, leaf composition, seedling growth, anthocyanin accumulation, abscisic acid biosynthesis, phosphate acquisition, and tolerance to drought, salt, dehydration, osmotic stress, nematodes, Verticillium dahliae and other pathogens. Studies of related genes in other species connect the family to defence, cell wall modification, organ size and calcium signalling.