APX — Daucus carota subsp. sativus

Summary

DCAR_000433 (DcAPX) on carrot chromosome DCARv2_C10743436 encodes a haem peroxidase of the Ccp1-like family with L-ascorbate peroxidase activity (EC 1.11.1.7). The gene is associated with cellular response to oxidative stress, hydrogen peroxide catabolism, lignin anabolism, auxin metabolism, and gene silencing by miRNA. It has been linked to numerous agronomic traits including bacterial blight disease resistance, aphid response, biomass yield, photosynthetic rate, seed viability, days to flowering, root length, leaf senescence, ethylene sensitivity, jasmonic acid content, and water-use efficiency. The encoded protein localises to multiple compartments including peroxisome membrane, chloroplast thylakoid membrane, mitochondria, and extracellular regions. Studies of related genes in other species connect the family to drought and heat stress tolerance, oxidative stress resistance, photoprotection, and pathogen defence.