AOX1B — Daucus carota subsp. sativus

Summary

DCAR_028361 (symbol AOX1B, also known as DcAOX1) on carrot chromosome 8 encodes an alternative oxidase, a ubiquinol:oxygen oxidoreductase with alternative oxidase activity, and is associated with superoxide-generating NADPH oxidase activity, poly(U) binding, metal binding, and protein binding. The gene is associated with alternative respiration, electron transfer, regulation of ROS metabolic process, and regulation of salicylic acid mediated signaling pathway. It is associated with biomass formation, stress response, growth regulation, somatic embryogenesis, and phenylpropanoid biosynthesis in carrots. Associations also include respiration rate, photosynthetic rate, lignin content, root morphology, leaf variegation, cyanide-insensitive respiration, salt stress tolerance, and oxidative stress tolerance. The protein localizes to the mitochondrial inner membrane, cytosol, and nucleus. Studies of related genes in other species link the family to submergence tolerance, salt response, and carbohydrate content.