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Article Dans Une Revue Biochemical Society Transactions Année : 2000

Effect of age on the fatty acid content of Blumeria graminis conidia

Résumé

Blumeria (=Erysiphe) graminis f.sp. tritici (Bgt), the causal agent of wheat powdery mildew, is responsible for an important disease leading to considerable yield reductions in wheat worldwide. Conidia of the obligate plant pathogen Bgt were analysed for their total fatty acid (FA) composition as a function of their ontogeny. A total of 17 FAs were detected (C12–C24 saturated and unsaturated ones), including the presence of unusual longchain monoenoic FAs. In young conidia, the major FAs were C18:2 (23%), C16:0 (16%), C18:0 (15.2%) and C18:1 (14.3%). In old conidia, the main FAs were C24:1 (20.7%), C22:0 (15%), C22:1 (13.5%) and C24:0 (9.7%). The amount of total FA was about 39 μg.mg of dry weight-1 in young conidia and decreased clearly to 18 μg.mg of dry weight-1 in older conidia. For the first time, we have demonstrated that the FA composition of conidia changes greatly with age. Medium-chain FAs (C12–C18) are predominant in very young conidia (75%), whereas long-chain FAs (C22–C24) are the major compounds in old conidia (74%). This study showed a significant elongation of FAs and a drastic decrease in the total FA amount during the ontogeny of conidia.
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Dates et versions

hal-04346092 , version 1 (14-12-2023)

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Citer

Jérôme Muchembled, Michel Sancholle, Anissa Lounès - Hadj Sahraoui, Anne Grandmougin-Ferjani. Effect of age on the fatty acid content of Blumeria graminis conidia. Biochemical Society Transactions, 2000, 28 (6), pp.875-877. ⟨10.1042/bst0280875⟩. ⟨hal-04346092⟩
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