Chemical Composition and Antioxidant Activity of Essential Oil from the Aerial Parts of Teucrium luteum (Mill.) Degen subsp. flavovirens (Batt.) Greuter & Burdet Growing Wild in Tunisia

Abstract

Essential oils (EOs), the odorous and volatile products of a plant’s secondary metabolism, have wide applications in folk medicine, in food flavoring and preservation, and in fragrance industries. The aim of this study was to analyze the chemical composition of the EO from the aerial parts (including the inflorescences) of wild Teucrium luteum subsp. flavovirens from Tunisia. The EO obtained by the hydrodistillation of air-dried plant material in a Clevenger-type apparatus was analyzed using gas chromatography coupled with mass spectrometry (GC-MS). Fifty-three components representing 83.9% of the total constituents were identified. The EO of T. luteum subsp. flavovirens is characterized by the presence of β-elemol (7.2%), (+)-α-pinene (6%), β-eudesmol (5.5%), guaiol (4.2%), α-bisabolol (4.2%), and β-caryophyllene (4.1%) as principal chemical components. In vitro (DPPH and β-carotene bleaching assays), it showed significantly higher radical scavenging and antioxidant properties than the reference compound, BHT. To the best of our knowledge, this is the first report describing the composition and antioxidant properties of the EO from Tunisian T. luteum subsp. flavovirens. Our preliminary data will help to valorize this potentially useful plant species from Tunisia and represent a starting point for further studies on its volatile fraction.

Phytochemical diversity within and among Sardinian populations of the endemic Teucrium marum L. (Lamiaceae) is determined by ecological factors

“…The high percentage of dolichodial in the Sardinian coastal populations, compared with the Sardinian mountain populations, and other ones (such as the Corsican samples), is economically remarkable [ 5 , 38 , 81 ]. To favour the sustainable economic use of Teucrium marum EO, simultaneously avoiding genetic erosion due to an unsustainable wild collection [ 82 , 83 ], we strongly suggest Sardinian T. marum micropropagation and its multiplication in nursery, to obtain a large number of new individuals [ [84] , [85] , [86] ], in accordance with IUCN [ 87 ], WWF/TRAFFIC, World Health Organization (WHO), the Convention on Biological Diversity [ [88] , [89] , [90] , [91] ], and the International Standard on Sustainable Wild Collection of Medicinal and Aromatic Plants [ 83 , 92 , 93 ] guidelines.…”

Chemical Composition and Biological Activity of Aerial Parts of Teucrium Polium L. Growing in Georgia

“…ტრადიციულ მედიცინაში, ძირითადად, გამოიყენება საჭმლის მომნელებელი და სასუნთქი სისტემის დაავადებების სამკურნალოდ [3,[8][9][10]. კვლევებით დადგენილია მისი ანტიბაქტერიული, ანტიოქსიდანტური, ანტივირუსული, ტკივილგამაყუჩებელი, ანთების და სიმსივნის საწინააღმდეგო, ჰიპოგლიკემიური, ჰიპოლიპიდემიური, სპაზმოლიზური, ფუნგიციდური მოქმედება [3,8,[11][12][13].…”