Plant Lipoxygenases and Jasmonic Acid

Fig. 1.3. Biosynthesis of the Unolenate metabolite and plant growth regulator, jasmonic acid. Abbreviations used are LOX, lipoxygenase AOS, allene oxide synthase AOC allene oxide cyclase p-OX 12-oxophytodienoic acid reductase and p-oxidase. Based on diagrams published in ref. 15.

In plants the 13-hydroperoxide produced from linolenic acid by lipoxygenase (Sect. 23.4.1.2) can be converted to the allene oxide by allene oxide synthase followed by cyclisation, reduction and -oxidation to form jasmonic acid, an important plant growth factor the corresponding methyl jasmonate is a valuable flavour and fragrance compound that imparts a sweet-floral, jasmine-like note... 

Melan MA, Dong XN, Endara ME, Davis KR, Ausubel FM, Peterman TK, An arabidopsis thaliana lipoxygenase gene can be induced by pathogens, abscisic acid, and methyl jasmonate. Plant Physiol 1993 101(2) 441-450,... 

---