Please use this identifier to cite or link to this item: http://ir.nbu.ac.in/handle/123456789/4513
Title: In vitro antibacterial activity as related to antioxidant property of some ethnomedicinal plants
Other Titles: NBU Journal of Plant Sciences, Vol.9, No.1 (March 2015) p 40-45
Authors: Saha, Jayati
Sarkar, Prabir Kumar
Keywords: Medicinal herb
Flavonoid
Antibacterial
Antioxidant
Issue Date: Mar-2015
Publisher: University of North Bengal
Abstract: The present study attempted to evaluate in vitro antibacterial and antioxidant activities of extracts from some ethnomedicinal herbs and to correlate among the parameters. The antibacterial activity was assayed using agar-disc diffusion method against seven bacterial species. Their total flavonoids content (TFC) and ferric reducing power (RP) were also evaluated. Herb extracts with high TFC exhibited a good antibacterial activity against the bacteria at low concentrations. The Gram-positive bacteria were more sensitive to the tested extracts than the Gram-negative ones. While Staphylococcus aureus was maximally inhibited, Escherichia coli was most resistant. Against each bacterium, antibacterial activity was positively correlated (r = 0.60-0.87) with TFC of the tested extracts. Positive correlations were also obtained between antibacterial and antioxidant activities (r = 0.60-0.96) as well as between TFC and antioxidant activity (r = 0.91) of the extracts. Thus, antibacterial and antioxidant activities of the tested extracts were closely associated with their flavonoid constituents.
URI: http://ir.nbu.ac.in/handle/123456789/4513
ISSN: 0974-6927
Appears in Collections:NBU Journal of Plant Sciences, Vol.9, No.1 (March 2015)

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