AO — Triticum turgidum subsp. durum

Summary

TRITD2BV1G123360 (symbol AO, preferred name TtAO) on durum wheat chromosome 2B encodes an aldehyde oxidase/xanthine dehydrogenase a/b hammerhead domain-containing protein with abscisic aldehyde oxidase, aryl-aldehyde oxidase, xanthine dehydrogenase, and indole-3-acetaldehyde oxidase activities (EC 1.2.3.1). The gene is associated with abscisic acid and auxin anabolism, carotenoid breakdown, glucosinolate metabolism, and cellular responses to aldehyde and hydrogen peroxide. Its product localises to plastid, cytosol, and nucleus. Associations include photosynthetic rate, carotenoid content, seed germination and dormancy, salt and temperature stress responses, stomatal movement and closure, leaf senescence, chlorophyll degradation, root elongation and gravitropism, vascular development, and resistance to pathogens including Bamboo mosaic virus. Studies of related genes in other species link the family to ABA biosynthesis, drought tolerance, and water balance homeostasis.