AO — Triticum turgidum subsp. durum

Summary

TRITD7BV1G214660 (symbol AO, also known as TtAO) on durum wheat chromosome 7B encodes an aldehyde oxidase, a molybdenum cofactor- and FAD-binding enzyme with abscisic aldehyde oxidase, aryl-aldehyde oxidase, xanthine dehydrogenase, and indole-3-acetaldehyde oxidase activities. The gene is associated with abscisic acid and auxin biosynthesis, carotenoid breakdown, glucosinolate metabolism, and responses to hydrogen peroxide and dehydration. Its product localises to plastids, cytosol, and nucleus. Associations link TtAO to photosynthetic rate, carotenoid content, seed germination and dormancy, stomatal movement and closure, leaf senescence, chlorophyll degradation, salt and temperature stress responses, pathogen resistance, root elongation, and cell wall biosynthesis. Studies of related genes in other species connect the family to drought tolerance, water balance, and wilty phenotypes, as well as grain, spikelet, and panicle traits.