Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3834

Full Length Research Paper

Antibacterial activity of some lichen extracts

Ali Karagöz1*, Nihal DoÄŸruöz2, Zuhal Zeybek2 and Ali Aslan3
1Istanbul University, Faculty of Science, Department of Molecular Biology and Genetics, 34118,Vezneciler-Istanbul, Türkiye. 2Istanbul University, Faculty of Science, Department of Biology, Vezneciler-Istanbul, Türkiye. 3Atatürk University, Kazım Karabekir Education Faculty, Biology Department, Erzurum, Türkiye.
Email: [email protected]

  •  Accepted: 22 October 2009
  •  Published: 31 December 2009

Abstract

The aqueous and ethanol extracts prepared from some lichens species were evaluated for antibacterial activity against six standard strains (Escherichia coli,Pseudomonas aeruginosa, Bacillus subtilis, Klebsiella pneumoniae, Staphylococcus aureus and Staphylococcus epidermidis) and two environmental strains (Aeromonas) that were isolated from different lakes. The aqueous and ethanol extracts showed a variable range of antibacterial activity to both standard strains and environmental strains. Ethanol extracts showed better antibacterial activity than aqueous extracts. It was found that the inhibition zone of tested bacteria against extracts have changed between 07 - 15 mm (diameter of inhibition zone). Some lichen extracts have moderate antibacterial effect. Both ethanol and aqueous extracts have inhibited the growth of three bacteria. Neither aqueous extracts nor ethanol extracts were inhibited the growth of five bacteria. The aqueous extract of Peltigera polydactyla and the ethanol extract of theRamalina farinacea exhibited potent antibacterial activities.

 

Key words: Antibacterial activity, lichens, MTT method.