Separation and identification of highly fluorescent compounds derived from trans-resveratrol in the leaves of Vitis vinifera infected by Plasmopara viticola |
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Authors: | Tříska Jan Vrchotová Naděžda Olejníčková Julie Jílek Rudolf Sotolář Radek |
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Institution: | Laboratory of Metabolomics and Isotopic Analyses, Global Change Research Center, Academy of Sciences of the Czech Republic, Brani?ovská 31, ?eské Budějovice 370 05, Czech Republic. triska.j@czechglobe.cz |
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Abstract: | A method for identification of highly fluorescent compounds in vine leaves infected by Plasmopara viticola was developed using reversed phase liquid chromatography with simultaneous diode array and fluorometric detection. Fluorescent compounds were extracted from leaves with a methanol-water mixture (70:30). Separation by HPLC was performed using a C(18) column and gradient elution with water-acetonitrile mixtures (20-80% of acetonitrile). The main unknown fluorescent compound was identified by line spectral comparison with a standard obtained by UV photoisomerization of trans-resveratrol glucoside, and its structure was confirmed by liquid chromatography-mass spectrometry. Identification and structural elucidation of the fluorescent compound in the leaves of Vitis vinifera allows early detection of Plasmopara viticola invasion. |
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