ABF1 — Sorghum bicolor

Summary

SORBI_3003G363400 (SbABF1, also known as SbABI5-1) encodes a bZIP transcription factor that localizes to the nucleus and binds sequence-specific DNA. In sorghum, this gene is associated with seed dormancy, pre-harvest sprouting, ear development, C4 photosynthesis, pollen maturation, photomorphogenesis, seedling development, and responses to abscisic acid, cold, and salinity. It is linked to upregulation of ABA-mediated signaling and DNA-dependent transcription. The gene has been connected to sprouting tolerance, chlorophyll content, seed germination under low-temperature stress, and stomatal closure. Studies of related ABI5 genes in barley and rice link the family to seed germination, drought tolerance, salt stress tolerance, fertility, leaf senescence, and stomatal aperture. Sequence similarity further connects the family to traits including grain yield, plant height, water use efficiency, and kernel number per row.