VP2 — Oryza sativa Indica Group

Summary

BGIOSGA007006 (VP2, also known as OiVP2) on chromosome 2 of Indica rice encodes a PPase-energised H-pump with proton-translocating pyrophosphatase activity (EC 7.1.3.1) and inorganic diphosphatase activity. The gene is associated with proton transmembrane transport, establishment of transmembrane electrochemical gradients, cold acclimation, salinity response, abscisic acid response, auxin polar transport, sucrose metabolism, cell wall pectin metabolism, regulation of starch biosynthesis, and leaf and embryo development. It is linked to seedling cold tolerance, cadmium accumulation, and traits including amylose content, grain length, grain size, leaf length, stomatal opening, and low temperature stress response. The product localises to the tonoplast, vacuolar membrane, Golgi cis cisterna, endosome membrane, and chloroplast envelope. Studies of related genes in other species connect the family to drought tolerance, salt tolerance, phosphorus use efficiency, and grain yield.