Nowadays, high content of antioxidants in plants and mushrooms is the reason for choosing a healthy life. Is the change in antioxidant activity in mushroom cultivation related to the metal values found in the compost? In order to find out the answer to this question, antioxidant activities of Pleurotus ostreatus and Pleurotus citrinopileatus grown with the addition of different metal salts to cotton compost media were determined by using DPPH method and total phenolic content was determined using Folin-Ciocalteu method. In addition, metal analyzes of mushroom samples were determined using ICP-OES. Results showed that P. citrinopileatus had higher antioxidant activity than P. ostreatus. In both mushroom species, IC50 values antioxidant activities were found to be Fe > Ca > Pure Water > Na > K in terms of DPPH damping. In the same way, the total phenolic values were followed by Fe > Ca > Pure Water > Na > K order for both mushroom species. These results showed that divalent Fe and Ca metals are important for the development of antioxidant activities in mushroom cultivation.
Pleurotus ostreatus, Pleurotus citrinopileatus, antioxidant activity, total phenolics