Biosynthesis and analysis of plant oxylipins

G. Griffiths*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The term oxylipin is applied to the generation of oxygenated products of polyunsaturated fatty acids that can arise either through non-enzymatic or enzymatic processes generating a complex array of products, including alcohols, aldehydes, ketones, acids and hydrocarbon gases. The biosynthetic origin of these products has revealed an array of enzymes involved in their formation and more recently a radical pathway. These include lipoxygenases and α-dioxygenase that insert both oxygen atoms in to the acyl chain to initiate the pathways, to specialised P450 monooxygenases that are responsible for their downstream processing. This latter group include enzymes at the branch points such as allene oxide synthase, leading to jasmonate signalling, hydroperoxide lyase, responsible for generating pathogen/pest defensive volatiles and divinyl ether synthases and peroxygenases involved in the formation of antimicrobial compounds. The complexity of the products generated raises significant challenges for their rapid identification and quantification using metabolic screening methods. Here the current developments in oxylipin metabolism are reviewed together with the emerging technologies required to expand this important field of research that underpins advances in plant-pest/pathogen interactions.

Original languageEnglish
Pages (from-to)565-582
Number of pages18
JournalFree Radical Research
Volume49
Issue number5
DOIs
Publication statusPublished - May 2015

Keywords

  • autoxidation
  • biotic stress
  • mass spectrometry
  • oxylipins
  • plant
  • signalling pathways

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