CCD1 — Cucumis melo

Summary

MELO3C023555.2 (CmCCD1) on melon chromosome 2 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 the anabolism of beta-carotene, xanthophyll, lycopene and abscisic acid. It has been linked to fruit and anther development, pollen development, ABA signaling, responses to salicylate, gibberellin, auxin and thirst, and the pentose-phosphate shunt and TCA cycle. The product localises to the chloroplast stroma, cytosol, cytoplasm, plasmalemma, Golgi complex, plant-type vacuole and plasmodesmata. Studies of related genes in other species link the family to β-ionone emission, herbivore resistance, carotenoid cleavage, fruit ripening, aroma, pigmentation, drought tolerance and ABA biosynthesis.