AAO — Daucus carota subsp. sativus

Summary

DCAR_001649 (DcAAO, also known as DcMCO2 and DcMCO3) on carrot chromosome 1 encodes a copper-containing oxidase of the ascorbate oxidase family, with L-ascorbate oxidase activity and p-diphenol:oxygen oxidoreductase activity. The gene is associated with ascorbate catabolism, lignin breakdown, and responses to oxidative stress, hydrogen peroxide, iron, jasmonic acid, and virus infection. It is linked to downregulation of antiviral and salinity responses, as well as defense responses. The encoded protein localises to the apoplast, plant-type cell wall, plastid, and plasmodesma. DcAAO is associated with photosynthetic rate and iron transport. Studies of related genes in other species connect the family to traits including salt response, drought tolerance, net photosynthetic rate, stomatal resistance, plant height, stem diameter, and iron content.