BG1 — Oryza sativa Japonica

Summary

Os01g0944800 (BG1, also known as Gns3) encodes a glycosyl hydrolase family 17 protein with glucan exo-1,3-beta-glucosidase, cellulase, lichenase, and glucan endo-1,3-beta-D-glucosidase activities. The gene is associated with downregulation and regulation of photosynthesis, cytokinin transport, 1,3-beta-glucan breakdown, MAPK cascade, lateral root development, stomatal movement, and chlorophyll fluorescence. It has been linked to numerous agronomic traits including grain shape, grain length, grain weight, grain number, grain yield, amylose content, sucrose content, protein content, panicle length, plant height, leaf length, seed size, and grain filling period. Associations also include brittle culm, embryoless seed, salt tolerance, drought response, nitrate uptake, transpiration rate, stomatal resistance, and disease resistance. The protein localizes to the apoplast, plant-type cell wall, vacuole, ER, Golgi, plasmodesmata, secretory vesicle, and mitochondria. Studies of related genes in other species link the family to plasmodesmal conductivity, callose degradation, defense response, and pathogen resistance.