HY5 — Cucumis sativus

Summary

CsHY5 (CSA_3G878800) on cucumber chromosome 3 encodes a bZIP transcription factor of the Hac1/HY5 family with DNA-binding transcription activator activity, phytochrome binding, and red/far-red light photoreceptor activity. It is associated with the regulation of phytochrome signaling, upregulation of photosynthesis and lateral root development, ascorbate metabolism, cellular water homeostasis, and sucrose-mediated signaling. The gene has been connected to numerous agronomic traits including grain yield, fruit quality, total soluble sugar content, leaf area, vegetative vigor, seed coat hardness, osmotic adjustment capacity, and responses to light quality, UV-A, and glyphosate. It is also linked to lycopene content, anthocyanin production, starch degradation, fungal tolerance, and mycorrhizal symbiosis. Related genes in other species are linked to light signaling, photoperiod-dependent flowering, insect resistance, carotenoid biosynthesis, fruit ripening, and cold tolerance.