Screening of phytochemical and antibacterial potential of diff erent organic solvent extracts of Stoechospermum marginatum (Ag) Kutz. from Manappad coast, Tuticorin District, South India

Authors

  • G. Adaikala Raj, M. Chandrasekaran S. Krishnamoorthy, V. Venkatesalu

Abstract

The antibacterial activity of different extracts of hexane, chloroform, ethyl acetate, acetone and methanol extract
of a brown alga, Stoechospermum marginatum (Ag) Kutz. against Bacillus subtilis, Streptococcus pyogenes,
Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Proteus vulgaris, Pseudomonas aeruginosa, Salmonella
typhimurium, Shigella flexneri and Vibrio cholerae. The extent of the inhibitory zone, Minimum Inhibitory
Concentration (MIC) and Minimum Bactericidal Concentration (MBC) were determined. The ethyl acetate
extract of S. marginatum showed the highest antibacterial activity against all the bacterial strains tested than
the other extracts. The mean zones of inhibition produced by the extracts in agar diffusion assays against the
tested bacterial strains ranged from 7.1 to 18.1 mm. The MIC were between 125 and 500 μg/ml, while the
MBC were between 250 and 1000 μg/ml. The ethyl acetate extract of S. marginatum showed the presence
of terpenoids, tannins, phenolic compounds and steroids strongly than the other solvent extracts. The highest
mean of zone inhibition (18.1 mm) was observed in the ethyl acetate extract of S. marginatum against B. subtilis.
These finding suggest that the ethyl acetate extract of S. marginatum can be used as an antibacterial substance
for the treatment of bacterial infections.

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Published

27-11-2015

How to Cite

S. Krishnamoorthy, V. Venkatesalu, G. A. R. M. C. (2015). Screening of phytochemical and antibacterial potential of diff erent organic solvent extracts of Stoechospermum marginatum (Ag) Kutz. from Manappad coast, Tuticorin District, South India. Journal of Medicinal Herbs and Ethnomedicine, 1, 50–58. Retrieved from https://updatepublishing.com/journal/index.php/jmhe/article/view/2872

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