HLH2 — Daucus carota subsp. sativus

Summary

DCAR_013315 (symbol HLH2, also known as PAR1, DcPAR1, DcPAR2, DcHLH2, and PAR2) on carrot chromosome 4 encodes an uncharacterized protein belonging to the bHLH_AtIBH1-like family with DNA-binding transcription factor activity, protein dimerization activity, and promoter-specific chromatin binding. In carrots, the gene is associated with taproot development, carotenoid anabolism, photoprotection, regulation of auxin biosynthesis and signaling, brassinosteroid response, red/far-red light signaling, thermomorphogenesis, salt response, and developmental timing. It is linked to numerous traits including fruit set, leaf area, peduncle length, heterosis, starch grain synthesis, phosphorus uptake, cell elongation, anthocyanin content, and responses to temperature, light intensity, and abiotic stress. Related genes in other species are linked to cell elongation, floral induction, fruit development, root development, nutrient response, high temperature acclimation, flowering, basal thermotolerance, heat stress-induced leaf senescence, photoperiodic growth, abiotic stress response, and seedling growth.