Document Detail

Resistance to Magnaporthe grisea in transgenic rice with suppressed expression of genes encoding allene oxide cyclase and phytodienoic acid reductase.
MedLine Citation:
PMID:  18786507     Owner:  NLM     Status:  MEDLINE    
Linolenic acid (18:3) and its derivative jasmonic acid (JA) are important molecules in disease resistance in many dicotyledonous plants. We have previously used 18:3- and JA-deficient rice (F78Ri) to investigate the roles of fatty acids and their derivatives in resistance to the blast fungus Magnaporthe grisea [A. Yara, T. Yaeno, J.-L. Montillet, M. Hasegawa, S. Seo, K. Kusumi, K. Iba, Enhancement of disease resistance to Magnaporthe grisea in rice by accumulation of hydroxy linoleic acid, Biochem. Biophys. Res. Commun. 370 (2008) 344-347; A. Yara, T. Yaeno, M. Hasegawa, H. Seto, J.-L. Montillet, K. Kusumi, S. Seo, K. Iba, Disease resistance against Magnaporthe grisea is enhanced in transgenic rice with suppression of omega-3 fatty acid desaturases, Plant Cell Physiol. 48 (2007) 1263-1274]. However, because F78Ri plants are suppressed in the first step of the JA biosynthetic pathway, we could not confirm the specific contribution of JA to disease resistance. In this paper, we generated two JA-deficient rice lines (AOCRi and OPRRi) with suppressed expression of the genes encoding allene oxide cyclase (AOC) and 12-oxo-phytodienoic acid reductase (OPR), which catalyze late steps in the JA biosynthetic pathway. The levels of disease resistance in the AOCRi and OPRRi lines were equal to that in wild-type plants. Our data suggest that resistance to M. grisea is not dependent on JA synthesis.
Asanori Yara; Takashi Yaeno; Morifumi Hasegawa; Hideharu Seto; Shigemi Seo; Kensuke Kusumi; Koh Iba
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-09-09
Journal Detail:
Title:  Biochemical and biophysical research communications     Volume:  376     ISSN:  1090-2104     ISO Abbreviation:  Biochem. Biophys. Res. Commun.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-20     Completed Date:  2008-11-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372516     Medline TA:  Biochem Biophys Res Commun     Country:  United States    
Other Details:
Languages:  eng     Pagination:  460-5     Citation Subset:  IM    
Department of Biology, Faculty of Sciences, Kyushu University, 6-10-1 Hakozaki, Higash-ku, Fukuoka 812-8581, Japan.
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MeSH Terms
Cyclopentanes / metabolism
Fatty Acids, Unsaturated / genetics
Gene Expression
Genes, Plant*
Intramolecular Oxidoreductases / genetics*
Oryza sativa / genetics,  microbiology*
Oxidoreductases Acting on CH-CH Group Donors / genetics*
Oxylipins / metabolism
Plant Diseases / genetics*,  microbiology
Plants, Genetically Modified / genetics,  microbiology
Reg. No./Substance:
0/Cyclopentanes; 0/Fatty Acids, Unsaturated; 0/Oxylipins; 67204-66-4/12-oxophytodienoic acid; 6894-38-8/jasmonic acid; EC 1.3.-/Oxidoreductases Acting on CH-CH Group Donors; EC reductase; EC 5.3.-/Intramolecular Oxidoreductases; EC isomerase

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