Very long-chain phenylpropyl and phenylbutyl esters from Taxus baccata needle cuticular waxes |
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Authors: | Jetter Reinhard Klinger Adelheid Schäffer Stefanie |
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Affiliation: | Julius-von-Sachs-Institut für Biowissenschaften, Universit?t Würzburg, Julius-von-Sachs-Platz 3, D-97082, Würzburg, Germany. jetter@botanik.uni-wuerzburg.de |
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Abstract: | The cuticular wax of Taxus baccata L. needles was found to contain four different classes of long-chain esters that were identified by various chemical transformations with product assignment employing GC-MS. Homologous series of (1) 3-(4'-hydroxyphenyl)-propyl esters of C(20)-C(36) fatty acids, (2) 4-(4'-hydroxyphenyl)-2-butyl esters of C(18)-C(28) fatty acids, (3) 3-(3',4'-dihydroxyphenyl)-propyl esters of C(20)-C(32) fatty acids, and (4) 4-(3',4'-dihydroxyphenyl)-2-butyl esters of C(18)-C(28) fatty acids were identified. The four compound classes amounted to 0.1-3.6 micro g/cm(2) of needle surface area, corresponding to 0.2-7.6% of the wax mixture, respectively. While both phenylpropyl ester series had a maximum for the homolog containing tetracosanoic acid, in the phenylbutyl esters homologs containing eicosanoic and docosanoic acids predominated. |
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Keywords: | Taxus baccata Gymnospermae Yew Cuticular wax Leaves Phenolics Fatty acid esters |
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