AOX2 — Daucus carota subsp. sativus

Summary

DCAR_021859 (AOX2, DcAOX2) on carrot chromosome 6 encodes an alternative oxidase family protein with ubiquinol:oxygen oxidoreductase, superoxide-generating NADPH oxidase, and alternative oxidase activities, and binds metal ions. It is localized to the mitochondrial envelope and inner membrane. The gene is associated with alternative respiration, electron transfer, and structural organization. AOX2 is linked to respiration rate, photosynthetic rate, chloroplast biogenesis, nonphotochemical quenching, leaf variegation, germination, seed germination, and carotenogenesis. Studies of related genes in other species connect the AOX2 family to variegated leaf, chloroplast development, chlorophyll content, and plant height traits.