HY5 — Cucumis sativus

Summary

CSA_2G381650 (HY5, also known as CsHY5, CsTED-5, CmHY5, or TED-5) on cucumber chromosome 2 encodes a bZIP transcription factor with DNA-binding transcription activator activity, phytochrome binding, red/far-red light photoreceptor activity, and histidine kinase activity. This gene is associated with the regulation of the phytochrome signaling pathway, upregulation of photosynthesis and lateral root development, ascorbate metabolism, cellular water homeostasis, nitrate import, and sucrose-mediated signaling. It has been linked to numerous traits including fruit quality, grain yield, leaf area, osmotic adjustment capacity, UV-A and blue light sensitivity, seed coat hardness, gibberellic acid and brassinosteroid content, total soluble sugar content, and viral disease response. Studies of related genes in other species link the family to carotenoid biosynthesis, fruit ripening, cold tolerance, and sugar content, as well as light signaling, shade tolerance, and insect resistance.