CO — Daucus carota subsp. sativus

Summary

DCAR_001708 (symbol CO, also known as DcCO, FG, and multiple BBX/COL designations) on carrot chromosome 1 encodes a CONSTANS-like protein containing a CCT domain. The product is annotated with numerous molecular functions including OGTase, peptide-O-fucosyltransferase, and histone methylase activities, as well as red/far-red light photoreceptor activity. This gene is associated with regulation of the phytochrome signaling pathway, photoperiodic flowering responses (both short-day and long-day), chlorophyll breakdown, and circadian clock photoentrainment. It is linked to diverse traits including photoperiod sensitivity, vegetative vigor, leaf morphology, seed protein content, iron content, and responses to water stress, nitrogen, and glyphosate. Studies of related genes in other species link the family to flowering time, tuberization, stress tolerance, and root architecture.