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Conserved and species-specific oxylipin pathways in the wound-activated chemical defense of the noninvasive red alga Gracilaria chilensis and the invasive Gracilaria vermiculophylla.
MedLine Citation:
PMID:  22423296     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Chemical defense of the invasive red alga Gracilaria vermiculophylla has been studied and compared to that of the noninvasive but related Gracilaria chilensis. Both species rely on a wound-activated chemical defense that makes them less attractive to the herbivorous sea snail Echinolittorina peruviana. The chemical stress response of both species was monitored by LC-ESIMS-based metabolic profiling and revealed commonalities and differences. Both algae rely on a rapid lipoxygenase mediated transformation of arachidonic acid to known and novel oxylipins. Common products are 7,8-dihydroxyeicosatetraenoic acid and a novel eicosanoid with an unusual γ-lactone moiety. Several prostaglandins were predominantly formed by the invasive species. The role of some of these metabolites was investigated by surveying the attachment of E. peruviana on artificial food containing the respective oxylipins. Both algae species are defended against this general herbivore by 7,8-dihydroxyeicosatetraenoic acid, whereas the prostaglandins and the novel oxylipins were inactive at naturally occurring concentrations. The role of different oxylipins in the invasive potential of Gracilaria spp. is discussed.
Authors:
Martin Rempt; Florian Weinberger; Katharina Grosser; Georg Pohnert
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Publication Detail:
Type:  Journal Article     Date:  2012-02-21
Journal Detail:
Title:  Beilstein journal of organic chemistry     Volume:  8     ISSN:  1860-5397     ISO Abbreviation:  Beilstein J Org Chem     Publication Date:  2012  
Date Detail:
Created Date:  2012-03-16     Completed Date:  2012-08-23     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  101250746     Medline TA:  Beilstein J Org Chem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  283-9     Citation Subset:  -    
Affiliation:
Institute for Inorganic and Analytical Chemistry, Lessingstr. 8, Friedrich-Schiller-University, D-07743 Jena, Germany, Tel: +493641948171; Fax +493641948172.
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