ABF1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0300770 (ABF1, also known as HvABI5) on barley chromosome 3H encodes a bZIP transcription factor with sequence-specific DNA-binding and protein homodimerization activity. The gene is associated with abscisic acid (ABA) signaling, ABA-induced gene expression, seed germination, drought tolerance, and salinity response. It is linked to stomatal closure, chlorophyll breakdown, pollen maturation, embryogenesis, seedling development, and cold response. Associations also include flavonoid content, stomatal resistance, seed growth traits, and ABA sensitivity. Studies of related genes in other species connect the family to salt stress tolerance, stomatal aperture, leaf senescence, seed dormancy, and fertility. Sequence similarity links the family to agronomic traits including grain yield, kernel number, plant height, ear length, water use efficiency, and sprouting tolerance.