ARF6 — Cucumis sativus

Summary

CsARF6 (CSA_6G524670) on cucumber chromosome 6 encodes a protein containing ARF, AUX/IAA, PB1-like, and B3 DNA-binding domains, with DNA-binding transcription factor activity and the ability to bind chromatin, cis-regulatory regions, and promoter sequences. The gene is associated with carpel formation, sex differentiation and determination, filament development, shoot regeneration, and regulation of auxin biosynthesis, plant organ morphogenesis, and thermomorphogenesis. It has been linked to fruit set, total soluble sugar content, fruit quality, leaf area, floral organ number, adventitious root number, plant male sterility, heterosis, phototropism, phosphorus uptake, and temperature stress response. The protein localises to the nucleus, cytosol, and cytoplasm, and is associated with auxin signalling and seed size regulation. Studies of related genes in other species connect the ARF6 family to gynoecium development, yield, drought tolerance, thermomorphogenesis, flowering time, and carotenoid accumulation.