CO — Daucus carota subsp. sativus

Summary

DCAR_026289 (DcCO) on carrot chromosome 7 encodes a CONSTANS-like protein containing B-box and CCT domains, and is annotated with OGTase activity, peptide-O-fucosyltransferase activity, and red/far-red light photoreceptor activity. The gene is associated with regulation of phytochrome signaling pathway, upregulation of short-day photoperiodism and flowering, response to long-day and short-day conditions, and photoentrainment of the circadian clock. It is linked to upregulation of chlorophyll breakdown, regulation of ascorbate biosynthesis, and drought escape pathways. Associations extend to numerous agronomic traits including photoperiod sensitivity, vegetative vigor, subterranean shoot axis tuber size, seed protein content, leaf angle, iron content, and responses to water stress, nitrogen, nitrate, glyphosate, and nematodes. Related genes in other species connect it to photoperiod-dependent flowering time, heat stress tolerance, disease resistance, tuberization, and seed longevity.