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International Journal of Medicinal Mushrooms
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ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.v18.i8.50
pages 689-698

Nonvolatile Taste Components and Antioxidant Properties of Fruiting Body and Mycelium with High Ergothioneine Content from the Culinary-Medicinal Golden Oyster Mushroom Pleurotus citrinopileatus (Agaricomycetes)

Shin-Yi Lin
Department of Food Science and Biotechnology, National Chung-Hsing University, Taichung, Taiwan, Republic of China; NCHU-UCD Plant and Food Biotechnology Program, Biotechnology Center, National Chung Hsing University, Taichung, Taiwan, Republic of China; Agricultural Biotechnology Center, NCHU, Taiwan, R.O.C
Shih-Chang Chien
The Experimental Forest Management Office, NCHU, Taichung, Taiwan, R.O.C
Sheng-Yang Wang
Department of Forestry, National Chung Hsing University, Taichung, Taiwan, Republic of China
Jeng-Leun Mau
Department of Food Science and Biotechnology National Chung-Hsing University 250 Kuokuang Road, Taichung 40227, Taiwan, ROC

RÉSUMÉ

Pleurotus citrinopileatus mycelium was prepared with high ergothioneine (Hi-Ergo) content and its proximate composition, nonvolatile taste components, and antioxidant properties were studied. The ergothioneine contents of fruiting bodies and Hi-Ergo and regular mycelia were 3.89, 14.57, and 0.37 mg/g dry weight, respectively. Hi-Ergo mycelium contained more dietary fiber, soluble polysaccharides, and ash but less carbohydrates, reducing sugar, fiber, and fat than regular mycelium. However, Hi-Ergo mycelium contained the smallest amounts of total sugars and polyols (47.43 mg/g dry weight). In addition, Hi-Ergo mycelium showed the most intense umami taste. On the basis of the half-maximal effective concentration values obtained, the 70% ethanolic extract from Hi-Ergo mycelium showed the most effective antioxidant activity, reducing power, and scavenging ability, whereas the fruiting body showed the most effective antioxidant activity, chelating ability, and Trolox-equivalent antioxidant capacity. Overall, Hi-Ergo mycelium could be beneficially used as a food-flavoring material or as a nutritional supplement.


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