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Molecules 2009, 14(6), 1990-1998; doi:10.3390/molecules14061990

Chemical Composition and Antibacterial Activity of the Essential Oils of Callistemon citrinus and Callistemon viminalis from South Africa

1
School of Chemistry, University of KwaZulu-Natal, Westville Campus, South Africa
2
Department of Chemistry, University of Zululand, KwaDlangezwa 3886, South Africa
*
Author to whom correspondence should be addressed.
Received: 13 March 2009 / Revised: 15 April 2009 / Accepted: 20 April 2009 / Published: 2 June 2009
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Abstract

The chemical composition and the antibacterial activity of the essential oils obtained by hydrodistillation from the leaves of Callistemon citrinus and Callistemon viminalis were analyzed by GC and GC/MS. Twenty-four and twelve components were identified for C. citrinus and C. viminalis, representing 92.0% and 98.3% of the total oils. The major components of C. citrinus and C. viminalis were 1,8-cineole (61.2% and 83.2%) and α-pinene (13.4% and 6.4%), respectively. The in vitro antibacterial activity of the essential oils was studied against 12 bacteria strains using disc diffusion and broth microdilution methods. The oils exhibited strong zone of inhibitions against some bacteria such as S. faecalis (20.3-24.0 mm), both strains of S. aureus (23.0-26.3 mm), B. cereus (17.3-19.0 mm) and S. macrcesens (11.3-23.7 mm) when compared to standard antibiotics gentamycin and tetracycline used as controls. Expect for P. aeruginosa and S. macrcescens, the MIC values of both essential oils ranged from 0.31-2.50 mg/mL. View Full-Text
Keywords: Callistemon citrinus; Callistemon viminalis; Myrtaceae; essential oil composition; antibacterial activity Callistemon citrinus; Callistemon viminalis; Myrtaceae; essential oil composition; antibacterial activity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Oyedeji, O.O.; Lawal, O.A.; Shode, F.O.; Oyedeji, A.O. Chemical Composition and Antibacterial Activity of the Essential Oils of Callistemon citrinus and Callistemon viminalis from South Africa. Molecules 2009, 14, 1990-1998.

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