Two very common groups of oxylipins formed in plants involve the conversion of fatty acid hydroperoxides, such as hydroperoxy-octadecatrienoic acid, into further metabolites by allene oxide synthase and hydroperoxide lyase. Both of these oxylipin branch pathways appear to be ubiquitous or nearly so in plants, but the relative activities of these two branches vary among plant species. In most plants examined, including Arabidopsis product formation from either of these pathways is minimal until elicited by wounding or some other means, upon which products from both pathways, such as jasmonic acid and C6 aldehydes and alcohols, can increase by orders of magnitude. In some plant species such as Artemisia and Jasminum spp. oxylipin product formation is heavily skewed towards allene oxide synthase products. Others such as watermelon (Citrullus lanatus) produce 10-fold higher amounts or more of hydroperoxide lyase than allene oxide synthase products. Arabidopsis and tobacco are intermediate between these extremes. Artemisia and Jasminum are also unusual in that they do not require wounding or other types of induction for high oxylipin product formation. Release of non-esterified fatty acids appears to be correlated with oxylipin formation, but phospholipase A2 appears not to be involved with oxylipin production, at least in the case of Artemisia leaves.
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Conference Article|
December 01 2000
Regulation of oxylipin synthesis
D. F. Hildebrand;
D. F. Hildebrand
1
1Department of Agronomy, University of Kentucky, Lexington, KY 40546-0091, U.S.A.
1To whom correspondence should be addressed (e-mail dhild@pop.uky.edu)
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M. Afitlhile;
M. Afitlhile
1Department of Agronomy, University of Kentucky, Lexington, KY 40546-0091, U.S.A.
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H. Fukushige
H. Fukushige
1Department of Agronomy, University of Kentucky, Lexington, KY 40546-0091, U.S.A.
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Publisher: Portland Press Ltd
Received:
June 27 2000
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2000 Biochemical Society
2000
Biochem Soc Trans (2000) 28 (6): 847–849.
Article history
Received:
June 27 2000
Citation
D. F. Hildebrand, M. Afitlhile, H. Fukushige; Regulation of oxylipin synthesis. Biochem Soc Trans 1 December 2000; 28 (6): 847–849. doi: https://doi.org/10.1042/bst0280847
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