Jasmonates - Hormone Synthetic Pathways and Genes in Arabidopsis

Jasmonates (jasmonic acid and related compounds) have been the only plant hormone class that is biosynthesized from fatty acid. They were initially isolated as inhibitors of growth. Later, they have been shown to regulate various physiological processes, including development of flowers and defense responses against herbivores and fungal pathogens. Recent studies on jasmonate receptors have shown that some amino acid conjugates of jasmonic acid (mainly jasmonoyl-isoleucine in Arabidopsis) are the bioactive form of this hormone class. The biosynthesis pathway is shown here.