American Journal of Essential Oils and Natural Products
  • Printed Journal
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ISSN: 2321-9114, ICV 2016: 79.57

American Journal of Essential Oils and Natural Products

2014, Vol. 2 Issue 1, Part A

Chemical composition and antimicrobial activity of essential oil of Ocimum kilimandscharicum (R. Br.) Guerke: A new chemotype

AUTHOR(S): Oladipupo A. Lawal, Isiaka A. Ogunwande, Oluwole E. Omikorede, Moses S. Owolabi, Felicia F. Olorunsola, Adetayo A. Sanni, Kehinde O. Amisu and Andy R. Opoku
ABSTRACT:The hydrodistilled essential oils from the flowers and leaves of Ocimum kilimandscharicum (R. Br.) Guerke growing in Nigeria were analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS). Nineteen and thirteen constituents representing 98.0% and 99.6% of the flower and leaf oils were identified, respectively. The major components of the flower oil were methyl eugenol (40.4%), borneol (11.9%) and linalool (10.6%) while the leaf oil consisted mainly of methyl eugenol (53.9%) and g-cadinene (16.2%). The antimicrobial activities of the oils were assayed against 12 local bacterial isolates and one reference bacterium using agar-disc diffusion and microdilution-broth methods. The results showed that the oils exhibited a wide range of antimicrobial activities. The mean zones of inhibition (IZ) ranged between 7.3 ± 1.5 and 15.1 ± 1.5 mm in the flower; and 9.3 ± 1.7 and 24.7 ± 1.0 mm in the leaf. The minimum inhibitory concentrations (MIC) values varied between 1.25 and 10 mg/mL (flower) and between 0.16 and 10 mg/mL (leaf). A new chemotype of essential oil of Ocimum kilimandscharicum is described.
Pages: 41-46  |  648 Views  14 Downloads
How to cite this article:
Oladipupo A. Lawal, Isiaka A. Ogunwande, Oluwole E. Omikorede, Moses S. Owolabi, Felicia F. Olorunsola, Adetayo A. Sanni, Kehinde O. Amisu and Andy R. Opoku. Chemical composition and antimicrobial activity of essential oil of Ocimum kilimandscharicum (R. Br.) Guerke: A new chemotype. 2014; 2(1): 41-46.
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