Screening of total phenol and flavonoid contents, antioxidant and antibacterial activities of the methanolic extract of Allium ampeloprasum L. (Alliaceae) from Iran

The methanol extracts of leaves and bulbs of Allium ampeloprasum L. (Alliaceae) were analyzed for their phenolic profiles and screened for their antioxidant and antibacterial activities. Two biochemical assays، namely DPPH free radical scavenging and β-caroten/linoleic acid activity systems، were used to evaluate antioxidant activity. Total phenol and flavonoid contents of the species were determined by Folin-Ciocalteu and AlCl3 assays، respectively. Results indicated that the extracts are different in total phenolic content. Results from antioxidant activity showed that the extracts studied in DPPH radical scavenging assay are lower active than ascorbic acid and BHT as synthetic antioxidants. Antibacterial assay showed that the bulbs extract is more effective in inactivation of Haemophilus influenzae and Bacillus cereus and the leaves extract is more effective in inactivation of Bacillus cereus at 100 mg ml-1 than others. Then، the extracts of Allium ampeloprasum possess strong antioxidant activity and may be used as new drug supplements in the future.