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Master Thesis

Atropa belladonna, une nouvelle plante hôte sauvage pour la mouche invasive Drosophila suzukii

Abstract : Discovered in Japan in 1931, Drosophila suzukii has recently become one of the most important pests of fruits. The wild hosts of D. suzukii remain poorly known. However, it has been shown to be able to feed on toxic berries of Atropa belladonna. We investigated the hypothesis of an adaptation of the invasive species D. suzukii on this plant. First, we studied the biochemical characterization of berries along the ripening process. The results of analyses on secondary metabolites showed that unripe berries had a high atropine concentration (0.025%). At the same time, we investigated the development of three strains of Drosophila on A. belladonna berries at different maturity stages. The comparison was performed between two strains of D. suzukii, one Japanese and one French, and one strain of D. melanogaster. For flies developing on unripe berries, our results showed a decrease of larval survival and an increase of the development time for all three strains. The differences observed between both strains of D. suzukii during development tend to show a possible adaptation of the invasive strain to A. belladonna. D. suzukii could then take advantage of a poorly used ecological niche that would confer several advantages to this pest.
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Master Thesis
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  • HAL Id : dumas-01212531, version 1

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Agathe Roussel. Atropa belladonna, une nouvelle plante hôte sauvage pour la mouche invasive Drosophila suzukii. Sciences agricoles. 2015. ⟨dumas-01212531⟩

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