Phytochemical, Antibacterial and Antioxidant Activities of dodonea viscosa Jacq. extracts Cultivated in Iraq

Abstract

In this present study, methanolic and aqueous crude extracts of leaves of Dodonaea viscosa were investigated for their antibacterial activity against Shigella dysenteriae, Salmonella typhi and Bacillus cereus using the agar well diffusion method. The high concentrations of methanolic and aqueous extracts (30 and 40 mg/ml) have inhibitory effects against microorganisms used in this study. The phytochemical analysis of the leaf extracts of D. viscosa were investigated the results show that the methanolic and aqueous extracts contain flavonoids, alkaloids, tannins, saponins, coumarins and steroids. In addition, the antioxidant and free radical scavenging activities were evaluated. The EC50 values of methanolic extract (8 μg/ml) has shown possess DPPH radical scavenging activity compared with reference substances BHT and vitamin C (EC50= 4 and 4.2 μg/ml) respectively.