CCD1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0419880, designated HvCCD1 (also known as HvNCED1) on barley chromosome 5H, encodes a protein with a Carotenoid_Oase domain and carotenoid dioxygenase activity, 9-cis-epoxycarotenoid dioxygenase activity, and metal binding. The gene is associated with carotenoid and xanthophyll breakdown, abscisic acid anabolism, gibberellin metabolism, stomatal closure, anther development, fruit ripening, and salt response. In barley, HvCCD1 is linked to abscisic acid accumulation, seed dormancy and secondary dormancy, and drought response. The protein localises to the chloroplast stroma, cytosol, plasmalemma, and other compartments. Associations extend to abscisic acid content, leaf relative water content, photosynthetic rate, chlorophyll content, and flavonoid content. Studies of related genes in other species link the family to seed germination, drought tolerance, herbivore resistance, and grain yield and weight.