AOX — Solanum tuberosum

Summary

PGSC0003DMG400007614, designated AOX (synonyms Aox1, AOX1, StAOX1) on potato chromosome 8, encodes an alternative oxidase (AOX_sf domain family) with alternative oxidase activity, ubiquinol:oxygen oxidoreductase activity, and superoxide-generating NADPH oxidase activity, and binds metal ions. The product localises to the mitochondrial inner membrane and respirasome. In potato, AOX1 is associated with respiratory capacity, alternative respiration, oxidative phosphorylation, electron transfer, cellular respiration, malate secretion, mitochondrial transport, response to iron, and aerenchyma formation. It has been linked to traits including respiration rate, photosynthetic rate, drought tolerance, oxidative stress response, root length, and self-incompatibility. Related genes in other species connect the family to quantum yield, water use efficiency, chlorophyll content, plant height, and photochemical quenching.