期刊
PLANT AND CELL PHYSIOLOGY
卷 50, 期 4, 页码 789-800出版社
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcp023
关键词
Arachidonic acid; Endophyte; Laminariocolax; Linolenic acid; Methyl jasmonate; Oxidative burst; Polyunsaturated fatty acids; Resistance
资金
- The Conseil Regional de Bretagne [560408, A3CBL9]
- Studienstiftung des Deutschen Volkes (Bonn)
- European Commission (Program MAST-III)
- Natural Environment Research Council (NERC, UK)
- the Ministere de lEducation Nationale, de Ia Recherche et de Ia Technologie and the Max-PlanckGesellschaft
- the Institut Francais de Ia Biodiversite
- the ECOKELP program [06 BDIV 012]
- French Research Agency (ANR)
- NERC [dml010007] Funding Source: UKRI
- Natural Environment Research Council [dml010007] Funding Source: researchfish
Arachidonic acid, linolenic acid and methyl jasmonate (MeJA) were found to be strong triggers of an oxidative burst in the kelp Laminaria digitata. These findings constitute the first report of an oxidative burst in an algal system induced by free fatty acids. The source of reactive oxygen species can be at least partially inhibited by diphenylene iodonium (DPI). Treatment with arachidonic acid increases the levels of a number of free fatty acids [including myristic (C14:0), linoleic (C18:2), linolenic (C18:3) and eicosapentaeneoic (C20:5) acids] and hydroxylated derivatives [such as 15-hydroxyeicosate-traenoic acid (15-HETE), 13-hydroxyoctadecatrienoic acid (13-HOTE) and 15-hydroxyeicosapentaenoic acid (15-HEPE)]. Similar to a previous report of the function of an alginate oligosaccharide-triggered oxidative burst in the establishment of resistance in L. digitata against infection by its brown algal endophyte Laminariocolax tomentosoides, C20:4- and MeJA-induced oxidative bursts seem to be involved in establishing the same protection in L. digitata. Altogether, this study supports the notion that lipid oxidation signaling plays a key role in defense induction in marine brown algae.
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