BG1 — Oryza sativa Japonica

Summary

OsBG1 (OS01G0940700) in rice encodes a glucan exo-1,3-beta-glucosidase and endo-1,3-beta-D-glucosidase with cellulase and lichenase activities, belonging to the glycoside hydrolase family 17. The gene is associated with downregulation and regulation of photosynthesis, cytokinin transport, MAPK cascade, stomatal movement, lateral root development, and chlorophyll fluorescence. It localizes to the apoplast, plant-type cell wall, secretory vesicle, vacuole, ER, Golgi, and plasmodesmata. OsBG1 is linked to numerous agronomic traits including grain yield, grain weight, grain length, grain shape, amylose content, plant height, panicle length, seed size, and protein content. It is associated with drought and salt tolerance, disease resistance, systemic acquired resistance, pathogen defense, abscisic acid biosynthesis, phosphate acquisition, and anthocyanin accumulation. Studies of related genes in other species link the family to plasmodesmal conductivity, callose degradation, and defense responses.