CCD1 — Zea mays

Summary

ZmCCD1 (ZM00001EB402840) on maize chromosome 9 encodes a protein with a carotenoid oxygenase domain and has carotenoid dioxygenase activity, 9-cis-epoxycarotenoid dioxygenase activity, and oxidoreductase activity acting on single donors with incorporation of molecular oxygen. The gene is associated with apocarotenoid, astaxanthin, lycopene, beta-carotene, carotene, and strigolactone anabolism; xanthophyll, carotenoid, and carotene breakdown; vision, tropism, cell wall thickening, fermentation, demethylation, homologous recombination, pigmentation, and hormone anabolism. It is linked to ear shape, ear color, ear aspect, grain color, grain number, grain weight, grain yield, kernel number per ear and per row, neoxanthin, zeaxanthin, carotene, carotenoid, and abscisic acid content, lignin content, photosynthetic rate, growth stage, and parasitic weed. The protein localizes to the chloroplast stroma, plant-type vacuole, Golgi complex, plasmodesma, cytosol, plasmalemma, and cytoplasm. Related genes in other species are associated with carotenoid cleavage, β-ionone emission, herbivore resistance, abscisic acid accumulation, seed dormancy, and drought response.