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Characteristics and Biological Properties of Pleurotus eryngii grown on Monosodium Glutamate-enriched Media  

Yoon, Dong-Yeon (Department of Food Science and Biotechnology, Sungkyunkwan University)
Park, Ki-Moon (Department of Food Science and Biotechnology, Sungkyunkwan University)
Lee, Jae-Heung (School of Mechanical Engineering, Korea University of Technology and Education)
Publication Information
KSBB Journal / v.25, no.3, 2010 , pp. 277-282 More about this Journal
Abstract
This study was performed to investigate the composition of amino acids and biological properties with the ethanol extract of fruiting bodies of Pleurotus eryngii grown on the sawdust compost mix (400 g sawdust plus 200 g rice bran) supplemented with various dosages of monosodium glutamate (MSG). Amino acid composition analyses showed that arginine, glutamic acid, alanine and glycine increased as the dosage of MSG was increased, whereas histidine, serine, methionine, isoleucine, leucine and phenylalanine did not increase. $\gamma$-Aminobutyric acid (GABA) content increased significantly up to 1.18 mg/g extract when 6 g MSG was supplemented to the sawdust mix. Antioxidant activity of the extract was estimated and compared to the standard antioxidant (ascorbic acid). The antioxidant property such as 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity increased with the extract samples of increasing dosage of MSG. Although the extract showed low levels of nitrite scavenging activity, this activity increased up to 1.5-2.0 fold when MSG was supplemented to the sawdust mix above a dosage of 0.5 g. The results obtained from the present investigation would appear that Pleurotus eryngii grown on the MSG-enriched sawdust mix can be used more effectively as one of potential sources of functional foods.
Keywords
DPPH; GABA; MSG; nitrite scarvenging activity; Pleurotus eryngii;
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