Stress‐ and pathway‐specific impacts of impaired jasmonoyl‐isoleucine (JA‐Ile) catabolism on defense signalling and biotic stress resistance

Jasmonate synthesis and signalling are essential for plant defense upregulation upon herbivore or microbial attacks. Stress‐induced accumulation of jasmonoyl‐isoleucine (JA‐Ile), the bioactive hormonal form triggering transcriptional changes, is dynamic and transient because of the existence of potent removal mechanisms. Two JA‐Ile turnover pathways operate in Arabidopsis, consisting in cytochrome P450 (CYP94)‐mediated oxidation and...