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Chemical characterization and antibacterial activity of the essential oils of Tetraclinis articulata (Vahl) from Morocco

Hannou Zerkani, Imane Tagnaout, Aziz Dirioiche, Imad Adadi, Jamila El Karkouri, Guy Stéphane Padzys, Touriya Zair

Abstract


The objective of this study was to identify new bioactive substances through the phytochemical study and evaluation of the antibacterial activity of the essential oils of Tetraclinis articulata (Vahl). Harvested in April 2016, in the region of Khenifra (Middle Atlas-Morocco).

     Separate of hydrodistillation extracts of the three organs (branches, leaves and fruits) of Tetraclinis articulate were performed. The yields of essential oils are 0.92% for fruits; 0.41% for branches and 0.61% for leaves.

     The GC/MS analysis allowed the identification of 33 compounds in essential oil leaves, 20 compounds in excess fruits and 58 compounds in branches. The main compounds are bornyl acetate (38.54%) and α-pinene (6.71%) for leaves. α-pinene (22.12%); 13-epi-mannol (3.58%) and retinol (3.44%) for branches. Bornyl acetate (19.96%); α-pinene (12.47%) and retinol (11.98%) for fruits.

     The antibacterial properties of the essential oil of leaves of Tetraclinis articulata (Vahl) were tested in clinical bacterial strain. The essential oils inhibit the growth of Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae at 1.2 µl/ml; 2.4 µl/ml and 9.7 µl/ml respectively.

     Indeed, the resistance of bacteria to antibiotics is known for its adverse effects on human

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DOI: http://dx.doi.org/10.13171/mjc851907076hz

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