Abstract

IN VITRO RELATIVE FREE RADICAL SCAVENGING EFFECTS OF CALOCYBE INDICA (MILKY OYSTER) AND PLEUROTUS DJAMOR (PINK OYSTER)

Ferdousi Rahman Mowsumi, Asiqur Rahaman, Nirod Chandra Sarker, Bazlul Karim Choudhury and *Shahdat Hossain

ABSTRACT

Mushrooms are perceived as one of the important food supplements that contain considerable amount of natural antioxidants. In this investigation, the relative free radical scavenging effect of Calocybe indica (milky oyster) and Pleurotus djamor (pink oyster) extracts were determined with the use of stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) against those of the synthetic antioxidant butylatedhydroxyl toluene (BHT) and natural antioxidant vitamin C (Vit C). Total polyphenol contents (TPC) of the C. indica and P. djamor mushroom were, respectively, 19.30 and 20.30 mg gallic acid equivalent (GAE)/g of the mushroom. IC50 (Inhibitory Concentration required to scavenge 50% of 0.4 mM DPPH-free radicals) of Vit C, BHT, milky and pink mushroom were, respectively, 3.2±1.10, 20.9±1.20, and 3.9 ±1.11 and 4.10±1.10 mg/ml. The results of the present study demonstrate that the mushroom extracts were capable of scavenging DPPH-free radicals at significant level but there were no significant differences in their scavenging abilities. The results were consistent with their almost equal total polyphenol contents.

Keywords: Calocybe indica, Pleurotus djamor extract, lipid peroxidation, free radical.