ABF2 — Solanum tuberosum

Summary

StABF2 (PGSC0003DMG400008011) on potato chromosome 4 encodes a bZIP transcription factor of the BZIP46-like family, with sequence-specific DNA binding and transcription cis-regulatory region binding activities. It localises to the nucleus and is associated with abscisic acid (ABA) signaling, cold acclimation, seed germination, seedling and root development, pollen maturation, and memory. The gene is linked to upregulation of ABA-mediated signaling, wax anabolism, lipid metabolism, detoxification, and responses to cold and drought, including drought escape via an ABA-dependent pathway. Associations with proline content, photosynthetic rate, salt stress resistance, drought resistance, cold tolerance, anthocyanin biosynthesis, fruit metabolite content, and pathogen resistance have been reported. Studies of related genes in other species link the family to drought and salinity tolerance, fruit ripening, and traits including leaf thickness, water use efficiency, stomatal resistance, and carotenoid content.