ABF2 — Solanum lycopersicum

Summary

Tomato gene ABF2 (AREB1, SlAREB1, BZIP23) on chromosome 4 encodes a bZIP transcription factor with sequence-specific DNA binding, transcription cis-regulatory region binding, protein homodimerization activity, and DNA binding transcription factor activity. It is associated with drought tolerance, saline-alkaline stress tolerance, salinity tolerance, cold tolerance, pathogen resistance, and abiotic stress response in tomato. The gene is linked to fruit ripening, anthocyanin biosynthesis, and hypocotyl elongation. It has been connected to leaf thickness, leaf water potential, leaf relative water content, hydrogen peroxide content, drought sensitivity, fruit color, carotenoid content, net photosynthetic rate, transpiration rate, water use efficiency, sugar content, seed maturation, stomatal resistance, chlorophyll content, plant height, and root length. The gene is localized to the nucleus and is associated with abscisic acid anabolism, cytokinin transport, carotene anabolism, lycopene anabolism, proline metabolism, and wax anabolism. Studies of related genes in other species link the bZIP family to proline content.