title: Methoxylated fatty acids in Blumeria graminis conidia.
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.
authors.affiliation: Laboratoire de Mycologie/Phytopathologie/Environnement, Université du Littoral Côte d'Opale, 17, Avenue Blériot--BP699, 62228 CALAIS Cedex, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Muchembled
authors.forename: Anissa Lounès-Hadj
authors.initials: AL
authors.lastname: Sahraoui
authors.forename: Frédéric
authors.initials: F
authors.lastname: Laruelle
authors.forename: Fabien
authors.initials: F
authors.lastname: Palhol
authors.forename: Daniel
authors.initials: D
authors.lastname: Couturier
authors.forename: Anne
authors.initials: A
authors.lastname: Grandmougin-Ferjani
authors.forename: Michel
authors.initials: M
authors.lastname: Sancholle
mesh_terms: D001203:Ascomycota / Q000737:chemistry*; D005227:Fatty Acids / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure
chemical_list: C501690:3-methoxydocosanoic acid; C501691:3-methoxytetracosanoic acid; D005227:Fatty Acids