Chemical composition and antimicrobial activity of Origanum libanoticum , Origanum ehrenbergii and Origanum syriacum growing wild in Lebanon - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemistry and Biodiversity Année : 2016

Chemical composition and antimicrobial activity of Origanum libanoticum , Origanum ehrenbergii and Origanum syriacum growing wild in Lebanon

Résumé

The essential oils (EOs) of the aerial parts of Origanum libanoticum and Origanum ehrenbergii, endemic to Lebanon, and Origanum syriacum, endemic to the Levantine, were obtained by distillation with a Clevenger apparatus. GC and GC/MS allowed identification of 96.4%, 93.5%, and 95.2% of their constituents, respectively. Carvacrol was the major component of both O. syriacum EO (79%) and O. ehrenbergii EO (60.8%). This compound was absent in O. libanoticum EO and the major compounds were β-caryophyllene (26.8%), caryophyllene oxide (22.6%), and germacrene D (17.2%). The assessment of their antimicrobial activity against Candida albicans and six pathogenic bacteria revealed that O. libanoticum EO was inactive, while O. syriacum and O. ehrenbergii showed moderate antimicrobial activity with minimal inhibitory concentrations varying from 400 to 1200 μg/ml. These results support the traditional use of these last two species in traditional herbal preparations in Lebanon.

Dates et versions

hal-01560534 , version 1 (11-07-2017)

Identifiants

Citer

Monay Al Hafi, Marc El Beyrouthy, Naim N. Ouaini, Didier Stien, Douglas N. Rutledge, et al.. Chemical composition and antimicrobial activity of Origanum libanoticum , Origanum ehrenbergii and Origanum syriacum growing wild in Lebanon. Chemistry and Biodiversity, 2016, 13 (5), pp.555-560. ⟨10.1002/cbdv.201500178⟩. ⟨hal-01560534⟩
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