CCD1 — Nicotiana attenuata

Summary

A4A49_18325 (CCD1) on chromosome 1 of coyote tobacco (Nicotiana attenuata) encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity and metal binding. The gene is associated with carotenoid, carotene and xanthophyll breakdown, as well as abscisic acid anabolism and signaling, and responses to salicylic acid, gibberellin and auxin. It has been linked to anther and pollen development, virus-induced PTGS, and cellular homeostasis. The product localises to the chloroplast stroma, cytosol, plasmalemma, Golgi, vacuole and plasmodesmata. Associations include chlorophyll content, salt tolerance, seed carotenoid content and degradation, volatile and blumenol biosynthesis, and chromium tolerance. Studies of related genes in other species connect CCD1 to fruit flavour, aroma, ripening, yield, colour and firmness, as well as drought, cold and salt stress tolerance, root development, and carotenoid metabolism.