Antioxidant and antifungal activities of some agro wastes and their phenolic acid profile

Abstract

In present study some selected agro wastes extracted with different solvent i.e. methanol, ethanol, chloroform and acetone were investigated for their antifungal and antioxidant activities and phenolic acid profile. The tested waste materials contained appreciable amount of total phenolic (0.27-198.90 GAE mg/g DW) and total flavonoids (0.02-96.20 CE mg/g DW), DPPH scavenging capacity (25.23-75.65 %), reducing power as 0.342.-1.74 (at 10 mg/mL extract concentration, absorbance at λ = 700 nm) and percent inhibition of linoleic acid (43.23-82.34 %). Antifungal activity of selected agro wastes extracts was assessed by using disc diffusion method and MIC against Aspergillus flavus and Aspergillus parasiticus strains. Citrus leaves and pomegranate peel extract showed remarkable antifungal activity compared to other extracts with the maximum zone of inhibition 37 and 35 mm, respectively. In addition, GC/MS analysis showed the presence of seven different phenolic acids i.e., gallic acid, p-coumaric acid, caffeic acid, ferulic acid, protocacheuic acid, cinamic acid and vanillic acid.