Abstract
Essential oil from the leaves of Eucalyptus globulus collected in north centre region ofMorocco obtained by hydro-distillation were analyzed by gas chromatography equipped with flame ionisation detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC-MS). To evaluate the antifungal activities of these aromatic extracts, their in vitroantifungal activities were determined by disk diffusion testing to find out minimum inhibitory concentration (MIC). Penicillium citrinum was used as test fungal strains. The results of the study revealed that essential oil yields and the total oil of E. globulus were 1.21 and 63.96%,respectively. 54 compounds were identified in the essential oils and the main constituents of the essential oils were: 1.8-cineole (22.35%), limonene, (7.01%), solanol (6.05%), β-pinene (5.20%), trans-verbenol (4.02%), terpinen-4-ol (3.10%), aristolene (2.35%), terpinyl acetate (2.10%), isosativene (1.85%), sabinene (1.49%), α-myrcene (1.15%) and α-terpineol (1.10%).The essential oil of E. globulus exhibited the activity against, P. citrinum exerting the minimum inhibitory concentration values (MIC) ranging from 3.07 to 96.14 μl/ml, respectively. These results showed that extracts could be considered as a natural antifungal source that can be used for production of natural antifungal agents. Key words: Eucalyptus globulus, essential oil, gas chromatography coupled with mass spectrometry (GC-MS), antifungal activity, 1.8-cineole.
Highlights
The essential oils which were utilised centuries ago in cosmetics usually show interesting biological features
The essential oils composition obtained in this study showed a relatively similar pattern to those published for other geographical regions: 1.8-cineole (84.7%), α-pinene (4.4%), trans-pinocarveol (2.2%), were reported as the major component in the essential oil of Eucalyptus viridis and 1,8-cineole (89.4%), β-pinene (1.2%) and α-pinene (1%) of Eucalyptus oleosa from Iran (Jaimand et al, 2009), oxygenated monoterpene: 1,8-Cineole (69.53%) and the monoterpene hydrocarbon: α-pinene (11.94%) from Tunisia (Bendaoud et al, 2009)
This study revealed a high level of chemical composition of the essential oils of E. globulus originated from localities in Atlas median from Morocco
Summary
The essential oils which were utilised centuries ago in cosmetics usually show interesting biological features. Essential oils were used in ancient Rome, Greece and Egypt and throughout the Middle and Far East as perfumes, food flavours, deodorants and pharmaceuticals (Baris et al, 2006). Essential oils have been studied most from the viewpoint of their flavour and fragrance chemistry only for flavouring foods, drinks and other goods. Essential oils and their components are gaining increasing interest because of their relatively safe status, their wide acceptance by consumers, and their exploitation for potential multi-purpose functional use
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