CCD1 — Daucus carota subsp. sativus

Summary

DCAR_003216 (CCD1, also known as DcCCD1 or DcNCED1) on carrot chromosome 1 encodes a carotenoid oxygenase with carotenoid dioxygenase and 9-cis-epoxycarotenoid dioxygenase activities, and metal binding. The gene is associated with carotenoid, carotene and xanthophyll breakdown, as well as anabolism of these compounds and abscisic acid. It is linked to drought response, flavor biosynthesis, volatile production, and responses to salicylic acid, gibberellin, auxin, salinity and thirst. The product localizes to the chloroplast stroma, cytosol, plasma membrane, Golgi, vacuole and plasmodesmata. Associations with carotene and carotenoid content have been noted. Studies of related genes in other species link the family to β-ionone emission, herbivore resistance, carotenoid cleavage, drought tolerance, ABA biosynthesis, fruit ripening, pigmentation, and cold and salt stress responses.