Composition and Chemical Variability of the Cone Oil from Algerian Tetraclinis articulata

Abstract

Very little is known about the yield and chemical composition of the essential oil isolated from cones of Tetraclinis articulata (Vahl) Masters (Cupressaceae). In continuation of our ongoing work devoted to the valorisation of medicinal and aromatic plants from Tlemcen Province (North-Western Algeria), cones have been harvested in eight locations (coastal township and highlands) and 40 oil samples have been isolated by hydrodistillation. Six oil samples were analyzed by a combination of chromatographic [GC(Retention indices)] and spectroscopic techniques (GC-MS, 13 C NMR). Then, the remaining 34 oil samples were analyzed by [GC(RI)] and 13 C NMR and the 40 compositions were submitted to statistical analysis. Essential oil yields varied substantially from sample to sample (0.17 to 1.13%, w/w). The cone oils consisted mainly of monoterpenes, with α-pinene (47.1-73.6%) and limonene (6.5-21.9%) being the main components. (E)-β-Caryophyllene and germacrene D were the major sesquiterpenes. Diterpenes, (Z) and (E)-biformene were identified for the first time in T. articulata essential oil. PCA analysis of the data allowed the distinction of two groups, the second group being subdivided into two subgroups. Groups and subgroups were differentiated with respect to their contents of α-pinene and limonene and, to a lesser extent, of sesquiterpenes.

Chemical composition and antioxidant activities of essential oils and extracts from cones of Tetraclinis articulata (Vahl) Masters

“…In another study (Chikhoune et al, 2013), Chikhoune et al reported a chemical composition dominated by αpinene; β-myrcene; limonene for two EOs of the cones studied. These results are close to the results found by Boussaïd et al (Boussaïd et al, 2016) who examined the chemical composition of six EO of T. articulate cones collected in six different regions of Algeria with a quantitativedifference.…”

Chemical Variability of the Berry Essential Oil of Two Subspecies of Juniperus Oxycedrus L. from Northwestern Algeria

“…The composition of BEO was dominated by monoterpene hydrocarbons with αpinene (56.4-78.9 %) as main component followed by myrcene (2.2-14.1 %) and germacrene D (4.5-12.4 %). [28] In continuation of our work on the characterization of Algerian conifers (Juniperus phoenicea, Tetraclinis articulata) through the composition and the chemical variability of their essential oils, [29][30][31] the aim of the present paper was to investigate the composition of the essential oils isolated from berries of the two subspecies of Juniperus oxycedrus growing wild in Northwestern Algeria, in order to evidence homogeneity or a chemical variability.…”

Composition and Chemical Variability of Root Bark oil from Ivoirian Cleistopholis patens

“…From the analytical point of view, combined analysis of essential oils by GC(RI), GC-MS and 13 C NMR appeared useful. Analyses: GC, GC-MS and 13 C NMR analyses were performed as previously reported [20,21].…”