
	Research Journal of Medicinal Plants
	Year: 2016 \| Volume: 10 \| Issue: 3 \| Page No.: 228-236 DOI: 10.3923/rjmp.2016.228.236

In-vitro Antioxidant and Antimicrobial Activity of Bougainvillea glabra Flower

Md. Zahidul Islam, Md. Tanvir Hossain, Foysal Hossen, Mir Salma Akter and Mohammad Arif Mokammel

Abstract: The aim of the present study is to assess the phytochemical nature, antioxidant and antimicrobial activities of methanolic extract of Bougainvillea glabra flower. Antioxidants play an important role in protecting cellular damage by reactive oxygen species. The fractions of the flower extract were screened for antioxidant activities using DPPH radical scavenging activity, reducing power assay, total antioxidant capacity and reduction of ferric ions by o-phenanthroline color method. Antimicrobial activities of different solvent fractions were tested against gram positive and gram negative bacterial strains by observing the zone of inhibition using disc diffusion method, where eImipenem (10 μg disc^–1) was used as the standard. The bacterial strains used in the study were Staphylococcus aureus , Bacillus cereus , Escherichia coli and Pseudomonas aeruginosa. The extracts revealed the presence of phytochemicals. Almost all three fractions exhibited remarkable antioxidant and antimicrobial activity in terms of all the assays tested. Water fraction showed DPPH radical scavenging activity with IC₅₀ value of 135.73 μg mL^–1. Not surprisingly, the n-hexane fraction showed excellent antioxidant activity for reduction of ferric ions by o-phenanthroline color method. All three types of fractions showed inhibitory effect against all tested bacteria except P. aeruginosa. These findings indicate compounds isolated from carbon tetrachloride and water fractions possess pharmacological properties and potential to develop natural compounds based pharmaceutical products. All fractions of B. glabra were found to be the most effective free radical quencher, a potent source of natural antioxidants and antimicrobial agents, thus justifying their traditional use in green therapeutics.

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How to cite this article:

Md. Zahidul Islam, Md. Tanvir Hossain, Foysal Hossen, Mir Salma Akter and Mohammad Arif Mokammel, 2016. In-vitro Antioxidant and Antimicrobial Activity of Bougainvillea glabra Flower. Research Journal of Medicinal Plants, 10: 228-236.

DOI: 10.3923/rjmp.2016.228.236

URL: https://scialert.net/abstract/?doi=rjmp.2016.228.236

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