AP2 — Solanum tuberosum

Summary

StAP2 (PGSC0003DMG400011046) on potato chromosome 10 encodes a DNA-binding transcription factor of the AP2/ERF domain family, with sequence-specific DNA binding, transcription corepressor and coactivator activities, and blue light photoreceptor activity. It localises to the nucleus, cytosol, nucleolus, Cajal body, SCF complex and transcription regulator complex. StAP2 is associated with regulation of starch biosynthesis, seed development, floral organ abscission, plant epidermal cell fate specification, photoentrainment of the circadian clock, and responses to biotic stimuli. It is linked to traits including starch yield and content, seed color, branch angle, photoperiod-sensitive flowering, plant size, male sterility, and responses to aphids, thrips, light, nitrate, potassium, and hormones such as gibberellic acid, jasmonic acid, cytokinin and ABA. Studies of related genes in other species connect the family to trichome development, mucilage production, tannin accumulation, hybrid seed viability, drought tolerance, and defence against pathogens and insects.