ATR2 — Daucus carota subsp. sativus

Summary

DcATR2 (DCAR_008270) on carrot chromosome 2 encodes a bHLH transcription factor of the AIB/MYC-like family, with annotated molecular functions including RNA polymerase II cis-regulatory region sequence-specific DNA binding, transcription corepressor and coactivator activities, and SUMO transferase activity. This gene is associated with the regulation of defense responses to insects, induced systemic resistance via ethylene signaling, glucosinolate biosynthetic process regulation, and cellular responses to sulfur starvation. It is linked to traits including anther and petal length, seed protein content, submergence tolerance, root epidermal cell length, and phosphorus and potassium sensitivity. The gene is also associated with herbivore resistance, aluminum tolerance, camalexin accumulation, and tryptophan biosynthesis. Studies of related genes in other species link the family to chilling tolerance, fruit quality, drought tolerance, and resistance to bacterial pathogens and Botrytis cinerea.