VP — Daucus carota subsp. sativus

Summary

DCAR_020893, designated DcVP on carrot chromosome 6, encodes a PPase-energised H-pump with proton-translocating pyrophosphatase activity (EC 7.1.3.1). The gene is associated with proton transmembrane transport, establishment of electrochemical gradients, and cell wall pectin metabolism. It has been connected to auxin polar transport, regulation of starch biosynthesis, sucrose metabolism, and sumoylation. DcVP is linked to responses to cold, abscisic acid, salinity, and thirst, as well as cold acclimation, leaf development, embryo development, and polar cell growth. The product localises to the tonoplast, vacuolar membrane, Golgi cis cisterna, endosome membrane, and chloroplast envelope. Associations with agronomic traits include leaf length, biomass yield, stomatal opening, and low temperature stress response. Studies of related genes in other species link the family to salt tolerance, drought tolerance, phosphorus use efficiency, and grain yield.