AOX — Beta vulgaris subsp. vulgaris

Summary

BvAOX (BVRB_5G108110) on sugar beet chromosome 5 encodes an alternative oxidase family protein with ubiquinol:oxygen oxidoreductase, alternative oxidase and superoxide-generating NADPH oxidase activities, and metal binding. The product localises to the mitochondrial inner membrane and is associated with alternative respiration, the electron transport chain, electron transfer, regulation of transport, NO storage and homeostasis. BvAOX is associated with respiration rate and photosynthetic rate. Studies of related genes in other species link the AOX family to drought tolerance, oxidative stress response, water use efficiency, chlorophyll content, quantum yield, photochemical quenching, plant height, root length and self-incompatibility, as well as respiratory capacity observed in potato.