Antibacterial Behavior of Weed Plants from Aseer, Saudi Arabia and Their Possible Mode of Action
International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
www.ijsr.net | Open Access | Fully Refereed | Peer Reviewed International Journal

ISSN: 2319-7064

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Research Paper | Microbiology | Saudi Arabia | Volume 4 Issue 11, November 2015

Antibacterial Behavior of Weed Plants from Aseer, Saudi Arabia and Their Possible Mode of Action

Mohamed Hashem, Saad A. Alamri, Ashia A. Shathan, Sulaiman A. Alrumman, Mahmoud F.M. Moustafa

With steadily growing of the microbial resistance against the classical antibiotics, searching new and effective natural antimicrobial agents become crucial. The study introduces new herbal extracts as antibacterial agents against both Gram-positive and Gram-negative bacteria. In vitro antibacterial activity of 15 weed plant species, collected from Aseer region, Saudi Arabia and their effective minimum inhibitory concentrations (MIC) were determined. The possible mode of action of the most effective plant extracts was investigated. Crude extracts of the investigated species were prepared using three organic solvents. Bacillus subtilis and Proteus vulgaris were used as test organisms to evaluate the antibacterial effect of the crude extracts and their (MIC). Examination with scanning electron microscopy of the treated bacteria as well as analysis of the plant extract using GC-MS were performed to explore the possible mode of action. Foeniculum vulgare, Xanthium spinosum, Abutilon pannosum, Solanum incanum, Forsskaolea tenacissima and Brassica deflexa were the most effective plants among the fifteenth tested species. Scan electron micrographs (SEM) revealed a clear morphological malformation in the bacterial shapes. This supports our hypothesis that extracts could alter the bacterial cell membrane permeability causing plasmolysis. GC-MS analysis of plant extracts proved the presence of aliphatic and aromatic compounds, whereas, the number and types of these compounds depended on the type of the organic solvent. The chloroform extracts of Xanthium spinosum, Abutilon pannosum are very promising antibacterial agents against both Gram-positive and Gram-negative bacteria. Further investigation is recommended to scale up and validate the application of the test plant extracts.

Keywords: Antibacterial, Weed plants, SEM, GC-MS, Saudi Arabia, Xanthium spinosum, Abutilon pannosum

Edition: Volume 4 Issue 11, November 2015

Pages: 2491 - 2499

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How to Cite this Article?

Mohamed Hashem, Saad A. Alamri, Ashia A. Shathan, Sulaiman A. Alrumman, Mahmoud F.M. Moustafa, "Antibacterial Behavior of Weed Plants from Aseer, Saudi Arabia and Their Possible Mode of Action", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=NOV151692, Volume 4 Issue 11, November 2015, 2491 - 2499

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