BG1 — Oryza sativa Japonica

Summary

OsBG1 (OS01G0947000) on rice chromosome 1 encodes a glycoside hydrolase family 17 protein with lichenase and glucan endo-1,3-beta-D-glucosidase activity. The gene is associated with 1,3-beta-glucan breakdown, regulation of photosynthesis, cytokinin transport, MAPK cascade, stomatal movement, lateral root development, and chlorophyll fluorescence. It is linked to multiple agronomically important traits including grain yield, grain weight, grain size, grain length, grain shape, grain number, amylose content, protein content, sucrose content, plant height, panicle length, leaf length, seed size, embryoless seed, brittle culm, transpiration rate, and stomatal resistance. The encoded protein localizes to the vacuole, cytoplasm, and extracellular space. Studies of related genes in other species further connect this family to glucan metabolism.