In a broad survey conducted throughout the Sicily region, 45 different sites were identiﬁed where thyme grows wild. All the biotypes collected were classiﬁed as Thymbra capitata (L.) Cav. (syn. Thymus capitatus (L.) HOFFMANNS.& LINK). Cluster analysis based on the main morphological characteristics of the plant led to the division of the biotypes into 3 major groups. All samples were analyzed for their secondary phytochemical metabolites identiﬁed in the extracts and the essential oils. LC-UV-DAD/ESI-MS and GC-FID/GC-MS have been applied to characterize the extracts and the essential oils, respectively. In the extracts, 15 ﬂavonoid derivatives with taxifolin-di-O-glucoside and thymusin as main components, and 2 organic acids, with a large predominance of rosmarinic acid, were identiﬁed. On the whole 37 compounds were fully characterized in the essential oils, carvacrol was identiﬁed as the main component with an average value of 73.93%. The total phenol content and the antioxidant activity of all phytochemical complexes were determined with the Folin–Ciocalteu (FC) assay, the UV radiation-induced peroxidation in liposomal membranes (UV-IP test), and the scavenging activity of superoxide radical (O 2 ).
|Numero di pagine||15|
|Rivista||CHEMISTRY & BIODIVERSITY|
|Stato di pubblicazione||Published - 2016|