CCD7 — Medicago truncatula

Summary

MTR_7G045370 (MtCCD7) on barrel medic chromosome 7 encodes a carotenoid-cleaving dioxygenase with 9-cis-beta-carotene 9',10'-cleavage oxygenase activity. The gene is associated with strigolactone, abscisic acid, apocarotenoid, phytoene, lycopene, beta-carotene and xanthophyll anabolism, as well as carotene and xanthophyll breakdown. It has been linked to auxin polar transport, secondary shoot formation, cold acclimation, anther development, fruit ripening, response to salicylate and herbicide, and lipogenesis. The product localises to the chloroplast thylakoid membrane, stroma and plastid. Associations with chlorophyll content and salt tolerance have been noted, and the gene is connected to shoot and lateral branching, leaf senescence, lateral root development, somatic embryogenesis, shoot regeneration, root system architecture, flowering time, and nitrogen deficiency response. Studies of related genes in other species link the family to strigolactone biosynthesis, vascular tissue development, and branching phenotypes.