Chemical composition and intraspecific variability of the essential oils of five populations of Hypericum triquetrifolium Turra growing in North Tunisia |
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Authors: | Rouis Zyed Elaissi Ameur Abid Nabil Ben Salem Lassoued Mohamed Ali Cioni Pier Luigi Flamini Guido Aouni Mahjoub |
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Affiliation: | Laboratory of Transmissible Diseases and Biological Active Substances, University of Monastir, Monastir, Tunisia. zyedrou@yahoo.fr |
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Abstract: | The chemical composition of the essential oils of five populations of Hypericum triquetrifolium Turra from Tunisia and their intraspecific variability were analyzed in detail by GC/MS. One hundred seventy-four compounds were identified, representing averages of 87.9 to 98.7% of the oil composition. The components are represented here by homologous series of monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpenes hydrocarbons, oxygenated sesquiterpenes, non-terpenic hydrocarbons, and others. Sesquiterpene hydrocarbons were the most abundant chemical compounds. Multivariate chemometric techniques, such as cluster analysis (CA) and principal-component analysis (PCA), were used to characterize the samples according to the geographical origin. By statistical analysis, the analyzed populations were classified into four chemotype groups. |
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