CIR1 — Daucus carota subsp. sativus

Summary

DCAR_003410 (CIR1, also known as DcRVE1 or DcRVE2) on carrot chromosome 1 encodes a SANT/Myb-domain transcription factor that binds DNA, homodimerizes, and regulates transcription. In carrot, CIR1 is associated with the regulation of circadian rhythm, auxin biosynthesis and signaling, jasmonic acid signaling, green leaf volatile biosynthesis, flower development, and vascular tissue pattern formation. The gene is linked to shoot apical meristem development, embryo development, and plant growth traits. Phenotypic associations include flowering time, seed germination and dormancy, circadian period length, hypocotyl length, cold tolerance, salt stress tolerance, and disease resistance to Peronospora parasitica. CIR1 is also connected to brassinosteroid sensitivity, gibberellin biosynthesis, chlorophyll biosynthesis, reactive oxygen species accumulation, and immunity. Studies of related REVEILLE family members in other species link the family to cold stress response, flowering time, hypocotyl elongation, and resistance to Pseudomonas syringae and Fusarium wilt.