VP — Daucus carota subsp. sativus

Summary

DCAR_009337, designated DcVP on carrot chromosome 3, encodes a PPase-energised H-pump with proton-translocating pyrophosphatase activity (EC 7.1.3.1). This vacuolar membrane protein is associated with proton transmembrane transport, establishment of electrochemical gradients, and auxin polar transport. DcVP has been linked to cell wall pectin metabolism, sucrose metabolism, regulation of starch biosynthesis, and responses to cold, abscisic acid, salinity, and thirst. It localises to the tonoplast, Golgi cis cisterna, endosome membrane, and chloroplast envelope. The gene is associated with leaf length, biomass yield, stomatal opening, and low temperature stress response. Related genes in other species are linked to salt tolerance, drought resistance, phosphorus use efficiency, and grain yield.