ANTIOXIDANT AND ANTIMICROBIAL ACTIVITY OF IMPATIENS WALLERIANA LOCAL TO MALAYSIA

Abstract

To study the antioxidant and antimicrobial activity of Impatiens walleriana local to Malaysia, against pathogenic bacterial strains. Total phenolic content, DPPH antioxidant, Disc Diffusion assay were performed to screen the samples of Impatiens walleriana for antioxidant and antibacterial activity against four Gram-negative and six Gram-positive bacterial strains. Zones of inhibition were measured and compared with 10 mg of penicillin as standard drug. Methanolic extract gives a higher amount of phenolic contents among all extracts 67.57 GAE g/kg. The DPPH radical scavenging activity of extracts ranged from 52-80% were found. Methanol extracts exhibit high scavenging activity among all extract were 80.4%. Methanol extract showcase high antibacterial activity against E-coli (16 mm) in disc diffusion assay. In conclusion present study demonstrate that Impatiens walleriana local to Malaysia have significant phytochemical and antioxidant activity.