Akademik Veri Yönetim Sistemi
Israel Journal of Plant Sciences, 2026 (SCI-Expanded, Scopus)
Volatile secondary metabolite (VSM) profiles of six species of Turkish Hypericum L. (H. lanuginosum, H. lydium, H. montbretii, H. olympicum, H. polyphyllum and H. retusum) from four different sections were determined by solid-phase microextraction (SPME) supported gas chromatography-mass spectrometry (GC-MS) analyses. All tested chemicals were dominated mainly by sesquiterpene hydrocarbons, oxygenated monoterpenes and monoterpene hydrocarbons, however main volatiles and the range of each constituent varied significantly with species. A total of 182 constituents were detected accounting for 100% of the total volatiles, H. polyphyllum being the richest with 35 components and H. lydium and H. olympicum the poorest with 25 components. Two multivariate techniques namely, hierarchical cluster analysis (HCA) and principal component analysis (PCA) were utilized to differentiate chemically the tested species. The results indicated H. lydium and H. polyphyllum populations as probably new chemotypes and H. montbretii and H. olympicum populations as likely β-caryophyllene chemotypes. The results also indicated no chemotaxonomic value for the volatile profiles and constituents. Such findings provide an important contribution to our knowledge of Hypericum chemistry and could help to elucidate the possible role of VSMs as chemical markers as well as the evolutionary relationships within botanical sections of the Hypericum genus.