VI1 — Oryza sativa Japonica

Summary

OS04G0413500, designated VI1 and also known as GIF1, encodes a beta-fructofuranosidase (invertase) with fructan exohydrolase, inulase and sucrose alpha-glucosidase activities, belonging to the Glyco_hydro_32 family. In rice, this gene is associated with domestication, seed size, grain quality, thousand grain weight, reproductive development and organ size. It is associated with grain yield, grain weight, tiller number, photosynthetic rate, cold and drought tolerance, sugar content, and grain length. The encoded protein localises to the vacuole, apoplast, cell wall, pollen tube and membrane. Biological process associations include sucrose and starch metabolism, endosperm and ovule development, carbohydrate storage, nectar secretion, and responses to gibberellin, cytokinin, abscisic acid and bacteria. Studies of related genes in other species link the family to pollen germination, male sterility, pathogen response, cell wall modification and root elongation.