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題名 | Mycelium and Polysaccharide Production of Agaricus Blazei Murrill by Submerged Fermentation=以液態發酵生產巴西洋菇Agaricus blazei Murrill菌絲體及多醣類 |
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作者 | 林志輝; 楊盛行; Lin, Jr-hui; Yang, Shang-shyng; |
期刊 | 微免與感染雜誌 |
出版日期 | 20060400 |
卷期 | 39:2 民95.04 |
頁次 | 頁98-108 |
分類號 | 368.87 |
語文 | eng |
關鍵詞 | 巴西洋菇; 菌絲體; 多醣類; Agaricus; Fermentation; Mycelium; Polysaccharides; Random amplified polymorphic DNA technique; |
英文摘要 | Background and Purpose: Over the last decade, Agaricus blazei Murrill has been studied and developed as a novel functional food in Japan, Korea, China, and Taiwan. Due to the low yields, the fruiting bodies of A. blazei Murrill are relatively expensive, and a cheap and stable source of A. blazei Murrill mycelium for commercial purposes is highly desirable. Culture media and conditions were investigated with a view to reducing the cost and improving the mycelium and polysaccharide production of A. blazei Murrill by submerged fermentation. Methods: Thirty six isolates of A. blazei Murrill were isolated from 22 fruiting bodies produced in Taiwan, and 16 of them could be successfully cultivated on mannitol-egg yolk-polymyxin medium. The isolates were identified by species-specific polymerase chain reaction (PCR) and optimized for the culture media and conditions by submerged fermentation for mycelium and polysaccharide production. Some properties of polysaccharide extract were also investigated. Results: All of the PCR products with species-specific primers showed high identity and matched the internal transcribed spacer 1 sequences of A. blazei Murrill. The phylogenic tree of A. blazei Murrill isolates generated from random amplified polymorphic DNAs arranged all samples into 3 groups and 2 independent cases. The optimal culture media of mycelium production in submerged fermentation were 5% malt extract, 0.1% yeast extract, and 0.5% peptone at pH 6.0, while the optimal culture conditions were 200 mL medium in 500 mL Hinton flask, shaking at 90 rpm for 3 days and then shifting to 105 rpm for 5 days at 27ºC. Each liter of A. blazei Murrill M72 yielded 10.83 ± 0.24 g dried mycelia weight and each liter of A. blazei Murrill M152 produced 0.251 ± 0.004 g crude polysaccharide (3.03 ± 0.05% of dried mycelia weight). Crude polysaccharide of A. blazei Murrill M162 contained 82.27-99.14% of total sugar and less than 1.63% of protein; it had 4 major molecular weight components (274.1, 32.7, 7.5, and 2.1 kDa, respectively), with the 2.1 kDa portion possibly a beta-(1,3)-glucan. Conclusions: These results show that selection of media and conditions can be employed in order to improve the mycelium and polysaccharide production of A. blazei Murrill M72 or M152 by submerged fermentation. Mycelia and polysaccharide production of A. blazei Murrill with submerged fermentation is potentially feasible. |
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