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    Do Different Substrates Affect Antioxidant Properties and Antimicrobial Activity of Pleurotus ostreatus?
    (2022) Bozdeveci, Arif; Avcı, Sibel; Karaoğlu, Şengül Alpay; Can, Zehra; Pekşen, Aysun
    Abstract: The aim of this study is to determine the effect of growing media on antioxidant properties and antimicrobial activities of Pleurotus ostreatus(Jacq. ex Fr.) P. Kumm. In the study, growing substrates were prepared with five tree sawdust (80%) and waste (20% Tea Waste or Wheat Bran) at different ratios (80% Sawdust + 20% TW, 80% Sawdust + 20% GW). The antimicrobial activities of methanol extracts from 19 P. ostreatus against microorganisms were tested by agar well diffusion technique. The total phenolic content was measured using the Folin-Ciocalteau procedure. The antioxidant capacity was determined using ferric reducing antioxidant power (FRAP) and free radical scavenging activity of DPPH. It was observed that the addition of 20% tea waste in the substrate had a positive effect on antimicrobial activity. It was determined that the methanol extract of mushrooms obtained from the 80QS+20TW substrate was the most effective extract against to all of microorganisms investigated in this study. Significant differences (P