VP — Daucus carota subsp. sativus

Summary

DCAR_005417, designated DcVP on carrot chromosome 2, encodes a PPase-energised H-pump with proton-translocating pyrophosphatase activity (EC 7.1.3.1). The gene is associated with establishment or maintenance of transmembrane electrochemical gradient, proton transmembrane transport, auxin polar transport, sucrose metabolism, cell wall pectin metabolism, and regulation of starch biosynthetic process. It is linked to cold acclimation, response to abscisic acid, salinity response, and response to thirst. The product localises to the tonoplast, vacuolar membrane, Golgi cis cisterna, endosome membrane, and chloroplast envelope. Associations include leaf length, biomass yield, stomatal opening, low temperature stress response, and abscisic acid sensitivity. Studies of related genes in other species link the family to salt tolerance, drought resistance, phosphorus use efficiency, and vacuole acidification, as well as grain yield and root biomass.