octadecanoid pathway
File:Jasmonic acid structure.png
The octadecanoid pathway is a biosynthetic pathway for the production of the phytohormone jasmonic acid (JA), an important hormone for induction of defense genes. JA is synthesized from alpha-linolenic acid, which can be released from the plasma membrane by certain lipase enzymes. For example, in the wound defense response, phospholipase C will cause the release of alpha-linolenic acid for JA synthesis.
In the first step, alpha-linolenic acid is oxidized by the enzyme lipoxygenase. This forms 13-hydroperoxylinolenic acid, which is then modified by a dehydrase and undergoes cyclization by allene oxide cyclase to form 12-oxo-phytodienoic acid. This undergoes reduction and three rounds of beta oxidation to form jasmonic acid.[http://bldg6.arsusda.gov/benlab/Soybean%20Defense%20Response/jasmonic_acid_synthesis.htm Jasmonic Acid Synthesis]
Footnotes
References
- {{cite book
| title = Plant Hormones: Physiology, Biochemistry and Molecular Biology
| publisher = Kluwer Academic Press
| date =30 April 1995
| location =
| pages = 836
| isbn = 978-0-7923-2985-5
| author = Peter J Davies}}
- {{cite journal
| title = Fatty acid-derived signals in plants
| author = Hans Weber
| journal = Trends in Plant Science
| year = 2002
| volume = 7
| issue = 5
| pages = 217–224
| doi = 10.1016/S1360-1385(02)02250-1
| pmid = 11992827
}}
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