Variation of Volatiles in Tunisian Populations of Teucrium polium L. (Lamiaceae)

Abstract

Volatiles from wild Tunisian diploid (2n=2x=26) and tetraploid (2n=4x=52) Teucrium polium L. populations from five bioclimatic zones were assessed by GC and GC/MS. Thirty-eight compounds were identified. Main volatiles at the species level were myrcene (6; 15.3%), germacrene D (27; 9.0%), alpha-pinene (6.6%), beta-pinene (3; 5.8%), and alpha-cadinol (38; 5.1%). A significant variation among populations was observed. The tetraploid populations belonging to the sub humid and lower semi arid bioclimates showed a high amount of myrcene (6; 24.2-43.8%), those from the upper arid contain high percentages of alpha-cadinol (38; 50.6%). The dominant compounds in diploid populations, mainly located in the semi arid zone, are alpha-pinene (1) and germacrene D (27). Population chemical structure, assessed by a principal component analysis (PCA) using all identified compounds, is concordant with bioclimate and ploidy level. In situ conservation of populations should be made appropriately according to these two factors.

HR-LCMS-Based Metabolite Profiling, Antioxidant, and Anticancer Properties of Teucrium polium L. Methanolic Extract: Computational and In Vitro Study

“…Indeed, Aghakhani et al [57] isolated twenty-two new flavonoid compounds that were first reported for Phlomis species. Our results are in agreement with previous studies that indicated that the Teucrium genus contains different classes of phytoconstituents such as monoterpenes, sesquiterpenes [58], polyphenols, flavonoids [59,60], and fatty acid esters [61,62]. Moreover, flavonoids are polyphenols that are detected in medicinal plants with a wide variety of biological activities [63].…”

“…Moreover, flavonoids are polyphenols that are detected in medicinal plants with a wide variety of biological activities [63]. Many previous studies have described the presence of various flavonoids such as apigenin, luteolin, rutin, cirsiliol, cirsimaritin, salvigenin, and eupatorin in the roots, aerial parts, and inflorescences of the plant [17,[59][60][61][62][63][64][65][66]. Furthermore, one intermediate in the biosynthetic pathways of alkaloids, iridoid glycoside (Harpagoside), was also detected [60].…”

Essential Oil Variability in Natural Populations of Artemisia campestris (L.) and Artemisia herba‐alba (Asso) and Incidence on Antiacetylcholinesterase and Antioxidant Activities

“…campestris different essential oil profiles, often characterized by the abundance of β ‐pinene, were also observed . Differences between our results and those previously reported could be attributed to the number of analyzed populations and especially to ecological conditions, phenological stage, and genetic diversity linked mainly to the ploidy level and the species breeding system …”

Chemical Composition and Phytotoxic Effects of Essential Oils from Four Teucrium Species

“…Aerial part extracts were known for their anti-inflammatory, antibacterial, antihypertensive, hypoglycemic, hypolipidemic, anorexic and antioxidant activities [9]. The species has been reported for its neo-clerodane diterpenoids and essential oils [16].…”