ATR2 — Daucus carota subsp. sativus

Summary

DCAR_024963 (ATR2, also known as DcJAMYC2, DcJAI1, and DcRD22BP1) on carrot chromosome 7 encodes a basic helix-loop-helix (bHLH) transcription factor of the MYC family, with annotated molecular functions including bHLH transcription factor binding, RNA polymerase II cis-regulatory region sequence-specific DNA binding, and transcription coactivator and corepressor activities. This gene is associated with the regulation of defense responses to insects, induced systemic resistance via the ethylene-mediated signaling pathway, positive regulation of seed maturation, and regulation of glucosinolate and ascorbate biosynthesis. It has been linked to traits including anther and petal length, seed protein content, submergence tolerance, and root epidermal cell length. Studies of related genes in other species connect the family to drought tolerance, chilling tolerance, fruit quality, and resistance to pathogens such as Botrytis cinerea and Fusarium oxysporum.