AO — Triticum turgidum subsp. durum

Summary

TRITD5BV1G212720 (symbol AO, preferred name TtAO) on durum wheat chromosome 5B encodes an aldehyde oxidase/xanthine dehydrogenase family protein 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, aldehyde, and thirst. Its product localizes to plastid, cytosol, and nucleus. Associations include carotenoid content, photosynthetic rate, seed germination and dormancy, stomatal movement and closure, leaf senescence, chlorophyll degradation, salt and temperature stress responses, pathogen and virus resistance, root elongation and gravitropism, vascular development, and wilty phenotype. Studies of related genes in other species link the family to ABA biosynthesis, drought tolerance, and basal defense.