Species-specific composition of free amino acids on the leaf surface of fourSenecio species |
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| Authors: | Leo L Soldaat Jean-Pierre Boutin Sylvie Derridj |
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| Affiliation: | (1) Institut National de la Recherche Agronomique (INRA), Unité de Phytopharmacie et des Médiateurs Chimiques, Service Médiateurs Chimiques, Route de Saint-Cyr, F-78026 Versailles cedex, France;(2) INRA Versailles Laboratoire du Métabolisme et de la Nutrition des Plantes, Route de Saint-Cyr, F-78026 Versailles cedex, France;(3) Present address: UFZ-Umweltforschungszentrum, Sektion Biozönoseforschung, Hallesche Straße 44, D-06246 Bad Lauchstädt, Germany |
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| Abstract: | The specificity of the chemical composition of the leaf surface of fourSenecio species was studied in order to understand the host selection ofTyria jacobaeae, a monophagous moth that hasSenecio jacobaea as its principal host plant. Pyrrolizidine alkaloids characteristic forSenecio species were not detected in water and sulfuric acid extracts of the leaf surface ofSenecio jacobaea. Water extracts of the leaf surfaces ofS. jacobaea, S. vulgaris, S. viscosus, andS. sylvaticus contained low concentrations of free amino acids. The proportions of these amino acids were very different from those inside the leaf tissues. In a discriminant analysis, the four species could be completely separated on the basis of the relative proportions of amino acids on the leaf surface. |
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| Keywords: | Amino acids leaf surface chemotaxonomy phylloplane pyrrolizidine alkaloids Senecio jacobaea Senecio sylvaticus Senecio viscosus Senecio vulgaris Tyria jacobaeae |
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