| Aspergillus infection inhibits the expression of peanut 13S-HPODE-forming seed lipoxygenases. | |
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MedLine Citation:
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PMID: 16255247 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Oxylipins recently have been implicated as signaling molecules for cross-kingdom communication in plant-pathogen interactions. Linoleic acid and its two plant lipoxygenase (LOX) oxylipin products 9- and 13-hydroperoxy fatty acids (9S- and 13S-HPODE) have been shown to have a significant effect on differentiation processes in the mycotoxigenic seed pathogens Aspergillus spp. Whereas both fatty acids promote sporulation, 9S-HPODE stimulates and 13S-HPODE inhibits mycotoxin production. Additionally, Aspergillus flavus infection of seed promotes linoleate 9-LOX expression and 9S-HPODE accumulation. Here, we describe the characterization of two peanut seed lipoxygenase alleles (PnLOX2 and PnLOX3) highly expressed in mature seed. PnLOX2 and PnLOX3 both are 13S-HPODE producers (linoleate 13-LOX) and, in contrast to previously characterized 9-LOX or mixed function LOX genes, are repressed between 5-fold and 250-fold over the course of A. flavus infection. The results of these studies suggest that 9S-HPODE and 13S-HPODE molecules act as putative susceptibility and resistance factors respectively, in Aspergillus seed-aflatoxin interactions. |
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Authors:
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Dimitrios I Tsitsigiannis; Susan Kunze; David K Willis; Ivo Feussner; Nancy P Keller |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Molecular plant-microbe interactions : MPMI Volume: 18 ISSN: 0894-0282 ISO Abbreviation: Mol. Plant Microbe Interact. Publication Date: 2005 Oct |
Date Detail:
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Created Date: 2005-10-31 Completed Date: 2006-01-23 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9107902 Medline TA: Mol Plant Microbe Interact Country: United States |
Other Details:
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Languages: eng Pagination: 1081-9 Citation Subset: IM |
Affiliation:
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Department of Plant Pathology, University of Wisconsin-Madison, Madison 53706, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aspergillus
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physiology* Base Sequence DNA Primers Linoleic Acids / biosynthesis* Lipid Peroxides / biosynthesis* Lipoxygenase / drug effects*, genetics Plants / embryology, enzymology* Polymorphism, Restriction Fragment Length Reverse Transcriptase Polymerase Chain Reaction Seeds / enzymology* |
| Chemical | |
Reg. No./Substance:
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0/DNA Primers; 0/Linoleic Acids; 0/Lipid Peroxides; 23017-93-8/13-hydroperoxy-9,11-octadecadienoic acid; EC 1.13.11.12/Lipoxygenase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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