ABA8OX1 — Triticum aestivum

Summary

TRAESCS6B02G298500 (TaABA8OX1) on wheat chromosome 6B encodes an abscisic acid 8'-hydroxylase, a cytochrome P450 monooxygenase with abscisic acid 8'-hydroxylase activity. The gene is associated with release of seed from dormancy, pre-harvest sprouting, and ABA catabolism, as well as with brassinosteroid homeostasis, sterol metabolism, and responses to red or far-red light, hypoxia, and abiotic and biotic stimuli. It has been linked to grain yield, harvest index, ear number, leaf chlorophyll content, salinity tolerance, stripe rust resistance, and fructose, sucrose and carbohydrate content. The encoded protein localises to the ER membrane and membrane fractions. Studies of related genes in other species link the gene to stomatal responses to CO₂ and light, drought tolerance, seed longevity, and nematode resistance, as well as to submergence tolerance, cold tolerance, and seedling vigour.