BG1 — Oryza sativa Japonica

Summary

OsBG1 (OS01G0944700) on rice chromosome 1 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, and also exhibits protein phosphorylated amino acid binding and protein binding. The gene is associated with 1,3-beta-glucan breakdown, cellulose anabolism, cytokinin transport, regulation of photosynthesis, MAPK cascade, lateral root development, stomatal movement, and chlorophyll fluorescence. It localizes to the secretory vesicle, vacuole, apoplast, plant-type cell wall, ER, Golgi, and plasmodesmata. OsBG1 is linked to numerous agronomic traits including grain yield, grain weight, grain length, grain shape, amylose content, protein content, plant height, panicle length, leaf length, seed size, sucrose content, nitrate uptake, transpiration rate, stomatal resistance, salt tolerance, drought response, and disease resistance. Studies of related genes in other species link the family to plasmodesmal conductivity, callose degradation, and pathogen defense.