Antioxidant Activities of Five Wild Edible Mushrooms Extracts From Qinghai
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Abstract:
The aim of the present study was to comprehensively analyze the antioxidant activities and relevant components of five wild edible mushrooms: Agaricus bisporus (Lange) Sing., Coprinus comatus (Muell: Fr.) S. F. Gray., Coprinus atramentarius (Bull.) Fr., Collybia radicata (Relh. ex Fr.) Quel., and Inocybe calamistrata (Fr.) Gill. from Qinghai province. The two extracts of I. calamistrata showed the strongest 2,2-diphenyl-1-picryhydrazyl (DPPH) scavenging capacity, and the EC50 values of its methanolic crude extract (MCE) and ethanolic crude extract (ECE) were 0.90 ± 0.06 mg/mL and 0.85 ± 0.14 mg/mL, respectively. The MCE (0.45 ± 0.01 mg/mL) and ECE (0.78 ± 0.01 mg/mL) of C. radicata showed the strongest metal chelating capacity. Both the MCE (0.26 ± 0.002 mmol Trolox equivalents/g) and ECE (0.24 ± 0.003 mmol Trolox equivalents/g) of I. calamistrata possessed the highest micromolar Trolox equivalent per gram. The total content of phenols (active antioxidant components) was significantly higher in the MCE of C. atramentarius (19.04 ± 0.30 mg gallic acid equivalents/g) than of the other four extracts (P < 0.05). Similarly, the total phenolic content was significantly higher in the ECE of I. calamistrata than of the other four extracts (P < 0.05). All five edible mushrooms showed marked antioxidant capacities; I. calamistrata showed the strongest antioxidant activity.