STH — Solanum tuberosum

Summary

StSTH (PGSC0003DMG400027017) on potato chromosome 6 encodes a B-box zinc finger protein with DNA-binding transcription factor activity, transcriptional co-regulator activity, and ubiquitin ligase activity. It is associated with the regulation of photoperiodic flowering, including both upregulation of short-day and downregulation of long-day flowering, as well as shade avoidance, anthocyanin and flavonoid metabolism, circadian rhythm, and responses to superoxide and brassinosteroid signalling. The gene has been linked to floral induction in potato and to numerous traits including yield, photoperiod-sensitive flowering time, root system morphology, light quality and UV sensitivity, seed set, plant size, starch grain synthesis, and responses to viral disease, cadmium, and nutrient status. It localises to the nucleus and to ubiquitin ligase complexes. Studies of related genes in other species link the family to salt stress tolerance, flowering time, and photomorphogenic development.