AP2 — Sorghum bicolor

Summary

SbAP2 (SORBI_3003G085600) on sorghum chromosome 3 encodes an AP2/ERF domain-containing protein, a DNA-binding transcription factor with transcription cis-regulatory region binding activity. This nuclear protein is associated with regeneration, cell wall modification, cold acclimation, defense response, signal transduction, and stress response, as well as DNA-dependent transcription and lipid metabolism. The gene has been linked to grain yield, grain number, seed weight, panicle weight, tiller number, plant height, stem thickness, biomass yield, anthesis time, and salinity tolerance. Studies of related genes in other species connect the AP2/ERF family to additional traits such as seed length, cob diameter, spike density, anther extrusion, and grain dimensions.