JAR1 — Solanum tuberosum

Summary

StJAR1 (PGSC0003DMG400033879) on potato chromosome 5 encodes a GH3 family protein with jasmonic acid-amido synthetase, adenylyltransferase and IAA amido synthetase activities, and is annotated as a far-red light photoreceptor. The gene is associated with jasmonic acid metabolism and signaling, cellular auxin homeostasis, anthocyanin and glutathione metabolism, and regulation of defence responses to bacteria. It is linked to traits including grain yield, panicle number, flower diameter, leaf and branch angle, reducing sugar content, photosynthetic ability, photoperiod-sensitive flowering time, and responses to red, far-red, blue and UV-B light. Associations also include herbivore defence, chilling tolerance, bacterial and fungal disease resistance, salt stress response, iron uptake, trichome production, root growth, and lignin deposition. Studies of related genes in other species link the family to jasmonoyl-isoleucine biosynthesis, pathogen defence, light signalling and shade-induced hypocotyl elongation.