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International Journal of Medicinal Mushrooms
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ISSN Imprimir: 1521-9437
ISSN En Línea: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v15.i2.40
pages 153-164

Submerged Cultivation of Mycelium with High Ergothioneine Content from the Culinary-Medicinal King Oyster Mushroom Pleurotus eryngii (Higher Basidiomycetes) and its Composition

Chih-Hung Liang
Department of Nutrition and Health Science, Chungchou Institute of Technology, Yuanlin, Changhua 51003, Taiwan, ROC; Department of Food Science, Tunghai University, Taiwan, R.O.C.
Ling-Yi Huang
Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuokuang Road, Taichung 40227, Taiwan
Kung-Jui Ho
Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuokuang Road, Taichung 40227, Taiwan
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
Jeng-Leun Mau
Department of Food Science and Biotechnology National Chung-Hsing University 250 Kuokuang Road, Taichung 40227, Taiwan, ROC

SINOPSIS

The culinary-medicinal king oyster mushroom, Pleurotus eryngii, was used to produce mycelia with high ergothioneine content using a one-factor-at-a-time method. The optimal culture conditions for mycelia harvested at day 14 were 25°C, 10% inoculation rate, 2% glucose, 0.5% yeast extract, and no adjustment to the initial pH value. With histidine or amino acid mix added, biomasses and the ergothioneine content of mycelia were higher than those of the control. The ergothioneine content of mycelia harvested at days 16−20 were higher than that of mycelia harvested at day 14. In addition, the ergothioneine content of mycelia from the fermentor (5.84−5.76 mg/g) was much higher than that of mycelia from the shaken flask (4.93−5.04 mg/g). Mycelia with high ergothioneine content showed a profile of proximate composition similar to that of regular mycelia but lost its characteristic umami taste. Overall, mycelia high in ergothioneine could be prepared by optimal culture conditions, the addition of precursors, prolonged harvest, and aeration in the fermentor.


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