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Jasmonate Biochemical Pathway

Plants possess a family of potent fatty acid–derived wound-response and developmental regulators: the jasmonates. These compounds are derived from the tri-unsaturated fatty acids α-linolenic acid (18:3) and, in plants such as Arabidopsis thaliana and tomato, 7(Z)-, 10(Z)-, and 13(Z)-hexadecatrienoic acid (16:3). The lipoxygenase-catalyzed addition of molecular oxygen to α-linolenic acid initiates jasmonate synthesis by providing a 13-hydroperoxide substrate for formation of an unstable allene oxide by allene oxide synthase (AOS). This allene oxide then undergoes enzyme-guided cyclization to produce 12-oxophytodienoic acid (OPDA). These first steps take place in plastids, but further OPDA metabolism occurs in peroxisomes. OPDA has several fates, including esterification into plastid lipids and transformation into the 12-carbon prohormone jasmonic acid (JA). JA is itself a substrate for further diverse modifications, including the production of jasmonoyl-isoleucine (JA-Ile), which is a major biologically active jasmonate among a growing number of jasmonate derivatives. Each new jasmonate family member that is discovered provides another key to understanding the fine control of gene expression in immune responses; in the initiation and maintenance of long-distance signal transfer in response to wounding; in the regulation of fertility; and in the turnover, inactivation, and sequestration of jasmonates, among other processes.

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Resource Type: Bibliography, Dataset, Diagram, Illustration, Journal article/Issue, Review, Table
Audience Level: Undergraduate upper division 15-16, Graduate, Professional (degree program)

Author and Copyright

Authors and Editors: Aurelie Gfeller of University of Lausanne, Switzerland, Lucie Dubugnon of Institut de Chimie Clinique, Lausanne, Robin Liechti of Swiss Institute of Bioinformatics, Lausanne, Edward E. Farmer of University of Lausanne, Switzerland
Publisher: American Association for the Advancement of Science
Format: application/pdf, image/gif, image/jpeg, image/svg+xml, text/html
Copyright and other restrictions: Yes
Cost: No


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