JAR1 — Solanum tuberosum

Summary

PGSC0003DMG400019881, designated StJAR1 (also known as StFIN219, StGH3.5, or StGH3.11) on potato chromosome 10, encodes a GH3 family protein with IAA-amido synthetase, JA-amino synthetase, and adenylyltransferase activities, as well as red/far-red light photoreceptor and ubiquitin ligase activities. StJAR1 is associated with jasmonic acid metabolism and conjugation, cellular auxin homeostasis, regulation of defence responses to bacteria, induced systemic resistance, wound healing, anthocyanin and glutathione metabolism, and responses to mycotoxin, arsenic, and far-red light. The gene has been linked to numerous agronomic traits including grain yield, panicle number, flower diameter, leaf and branch angles, reducing sugar content, photosynthetic ability, photoperiod-sensitive flowering time, and responses to light quality, viral disease, and insect damage. Related genes in other species connect the family to jasmonoyl-isoleucine biosynthesis, pathogen defence, light signalling, and shade-induced hypocotyl elongation.