Methoxylated fatty acids in Blumeria graminis conidia |
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Authors: | Muchembled Jérôme Sahraoui Anissa Lounès-Hadj Laruelle Frédéric Palhol Fabien Couturier Daniel Grandmougin-Ferjani Anne Sancholle Michel |
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Institution: | Laboratoire de Mycologie/Phytopathologie/Environnement, Université du Littoral C?te d'Opale, 17, Avenue Blériot--BP699, 62228 CALAIS Cedex, France. |
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Abstract: | The total fatty acids (FA) composition of Blumeria graminis f.sp. tritici conidia, the causal agent of wheat powdery mildew, was analyzed as a function of their age. A total of 19 FA (C12-C24 saturated and unsaturated) and unusual methoxylated fatty acids (mFA) were detected in young, intermediate and old conidia. Two very long chain methoxylated FA were identified by GC-MS as 3-methoxydocosanoic and 3-methoxytetracosanoic acids. Medium chain FA were predominant in young conidia (75%, including 13% of mFA) while very long chain fatty acids constituted the major compounds in old conidia (74%, including 30% of mFA). We have shown for the first time that the total FA composition is strongly correlated with the age of B. graminis f.sp. tritici (Bgt) conidia. |
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Keywords: | Bg Blumeria graminis Bgt Blumeria graminis f sp tritici Bgh Blumeria graminis f sp hordei f sp formae specialis FA fatty acids mFA methoxylated fatty acids FAMEs fatty acids methyl esters mFAMEs methoxylated fatty acids methyl esters |
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