Abstract

Antimicrobial and antioxidant activities of leaves and flowers essential oils of Egyptian Lantana camara L.

Author(s): Gamal S. El Baroty, Hanan M. Goda, Elham A. Khalifa and Hanaa H. Abd El Baky

The essential oil of flowers (FLCO) and leaves (LLCO) of Lantana camara species growing in Egypt were obtained by hydrodistillation, and analyzed by GC/MS. Twenty six constituents were detected in the FLCO representing 95.33% of the total oil, and eighteen in the LLCO representing 95.56% of the total oil. The main constituents were: davanone (28.59%), z-caryophillene (11.21%), a-curecumene (10.26%), b-copaene and humulene (12.29%) in FLCO, and Davanone (%23.37), E-caryophillene (22.96%) and humulene (14.32%) in LLCO. Both oils exhibited in vitro antimicrobial activity against Bacillus cereus and Bacillus subtillus. Bioautography on thin-layer chromatography plates demonstrated antimicrobial of the FLCO and LLCO with an Rf values of 0.30 and 0.55. A total of 7 compounds, 3 sesquiterpenoids (humulene, davanone and caryophellen) were detected and identified using gas chromatography–mass spectrometry analysis. However, transmission electron microscopy micrographs of tested B. cereus spores confirmed the effects of these oils on morphological and ultra-structural alterations in the treated spores. Moreover, the oils showed moderate antioxidant activity and this effect was increased by increasing their concentrations. The significant antimicrobial and antioxidant activities of both oils suggest that it could serve in medical purposes, food and perfumery industries.

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