title: Chemical composition and intraspecific variability of the essential oils of five populations of Hypericum triquetrifolium Turra growing in North Tunisia.
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.
authors.affiliation: Laboratory of Transmissible Diseases and Biological Active Substances, University of Monastir, Monastir, Tunisia. zyedrou@yahoo.fr
authors.forename: Zyed
authors.initials: Z
authors.lastname: Rouis
authors.forename: Ameur
authors.initials: A
authors.lastname: Elaissi
authors.forename: Nabil Ben Salem
authors.initials: NB
authors.lastname: Abid
authors.forename: Mohamed Ali
authors.initials: MA
authors.lastname: Lassoued
authors.forename: Pier Luigi
authors.initials: PL
authors.lastname: Cioni
authors.forename: Guido
authors.initials: G
authors.lastname: Flamini
authors.forename: Mahjoub
authors.initials: M
authors.lastname: Aouni
mesh_terms: D016000:Cluster Analysis; D008401:Gas Chromatography-Mass Spectrometry; D020902:Hypericum / Q000737:chemistry*; D039821:Monoterpenes / Q000032:analysis*; D009822:Oils, Volatile / Q000737:chemistry*; D025341:Principal Component Analysis; D012717:Sesquiterpenes / Q000032:analysis*; D014416:Tunisia
chemical_list: D039821:Monoterpenes; D009822:Oils, Volatile; D012717:Sesquiterpenes