CCD1 — Triticum aestivum

Summary

TRAESCS5D02G001900 (TaCCD1) on wheat chromosome 5D encodes a protein with a carotenoid oxygenase domain and has 9-cis-epoxycarotenoid dioxygenase activity, oxidoreductase activity acting on single donors with incorporation of two atoms of oxygen, and metal binding. In bread wheat, TaCCD1 is associated with abscisic acid biosynthesis, seed germination, alkali stress tolerance, and pre-harvest sprouting. It is linked to xanthophyll breakdown, carotenoid breakdown, lycopene anabolism, beta-carotene anabolism, carotene breakdown, abscisic acid anabolism, abscisic acid metabolism, calcium signaling, anther development, fruit ripening, xanthophyll anabolism, response to gibberellin, response to salicylate, cellular homeostasis, and pollen development. The protein localizes to chloroplast stroma, plant-type vacuole, Golgi complex, plasmodesma, cytosol, plasmalemma, and cytoplasm. TaCCD1 is associated with quantum yield, net photosynthetic rate, transpiration rate, stripe rust, root length, photochemical quenching, grain yield, drought tolerance, seed carotenoid content, ABA biosynthesis, and seed carotenoid degradation. Studies of related genes in other species link the family to seed dormancy, carotenoid cleavage, herbivore resistance, and traits such as grain weight, kernel number, and chlorophyll content.