MYB3 — Daucus carota subsp. sativus

Summary

DCAR_003163, designated DcMYB3 on carrot chromosome 1, encodes a Myb-family transcription factor with sequence-specific DNA-binding, protein dimerization, and protein phosphatase activity. In carrot, DcMYB3 is associated with anthocyanin pigmentation, particularly in roots, and with positive regulation of anthocyanin biosynthesis. It is linked to the regulation of flavonoid, proanthocyanidin, flavonol, lignin, and phenylpropanoid metabolism, as well as to trichome differentiation and spacing, and responses to iron starvation. Associations extend to root color, anthocyanin content, flowering time, cold acclimation, salt and freezing tolerance, herbivore defense, and disease tolerance. Studies of related genes in other species connect the family to UV-B tolerance, phenylpropanoid biosynthesis, and stress responses.