CCD1 — Triticum aestivum

Summary

TRAESCS5B02G002600 (TaCCD1-5B) encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity, belonging to the Carotenoid_Oase family. In bread wheat, this gene is associated with abscisic acid biosynthesis, seed germination, and alkali stress tolerance. It is linked to carotenoid and xanthophyll breakdown, as well as lycopene, beta-carotene, and abscisic acid anabolism. The gene has been connected to pre-harvest sprouting, anther and pollen development, fruit ripening, and responses to gibberellin and salicylate. Associations include grain yield, net photosynthetic rate, quantum yield, transpiration rate, photochemical quenching, root length, and stripe rust. The encoded protein localizes to the chloroplast stroma, cytosol, plasmalemma, and other cellular compartments. Studies of related genes in other species link the family to seed dormancy, carotenoid cleavage, β-ionone emission, herbivore resistance, and drought response.