CCR2 — Daucus carota subsp. sativus

Summary

DCAR_013459 (CCR2, also known as CRTISO) on carrot chromosome 4 encodes a carotenoid isomerase (EC 5.2.1.13) with redox activity, belonging to the CrtISO-like and amine oxidase domain families. The gene is associated with carotenoid anabolism, pigmentation, etioplast organization, and ABA signaling, and its product localizes to the chloroplast membrane. In carrots, CCR2 has been linked to root color, carotenoid content, respiration rate, parasitic weed interactions, plastid development, and carotenoid composition. Studies of related genes in other species link the family to diverse traits including grain size, flower and fruit color, carotene and lycopene content, chlorophyll accumulation, drought tolerance, plant height, and photomorphogenesis, as well as phenotypes such as altered carotene accumulation, reduced lutein, and delayed greening.