CCD4 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0607370 (HvCCD4) on barley chromosome 6H encodes a protein with a Carotenoid_Oase domain and has carotenoid dioxygenase activity, 9-cis-epoxycarotenoid dioxygenase activity, mRNA binding, metal binding and protein binding functions. The gene is associated with abscisic acid anabolism, beta-carotene and carotene breakdown, lycopene and beta-carotene anabolism, gibberellin metabolism, GA-signaling, response to gibberellin and salicylate, stomatal closure, anther development, fruit ripening, response to salt, and chloroplast mRNA modification. It localises to the chloroplast thylakoid membrane, stroma, cytosol and nucleus. The gene is linked to abscisic acid and carotenoid content, leaf relative water content, flavonoid content, photosynthetic rate, seed dormancy, chlorophyll content, salt tolerance, cold-induced pollen sterility, leaf senescence carotenoid turnover, seed β-carotene content, chloroplast development and RNA editing, and palisade cell development. Studies of related genes in other species connect the family to drought, cold, salt and heat stress tolerance, seed germination, pre-harvest sprouting, and abscisic acid biosynthesis.