Optimization of Ganoderma lucidum Polysaccharides Fermentation Process for Large-Scale Production
文献类型： 外文期刊
作者： Feng, Jie 1 ; Feng, Na 1 ; Tang, Qing-Jiu 1 ; Liu, Yan-Fang 1 ; Yang, Yan 1 ; Liu, Fang 1 ; Zhang, Jing-Song 1 ; Lin, Chi 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Key Lab Edible Fungi Resources & Utilizat South, Minist Agr,Inst Edible Fungi, Natl Engn Res Ctr Edible Fungi,Key Lab Agr Genet, 1000 Jinqi Rd, Shanghai 201403, Peoples R China
关键词： Ganoderma lucidum polysaccharide; Mycelium; Fermentation process; Optimization; Weight-average molecular weight
期刊名称：APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY （ 影响因子：2.926； 五年影响因子：2.685 ）
ISSN： 0273-2289
年卷期： 2019 年 189 卷 3 期
页码：
收录情况： SCI
摘要： The objective of this study was to increase the intracellular polysaccharide yield of Ganoderma lucidum. The accordingly optimized fermentation medium by central composite design method contains glucose 40 g L-1, yeast powder 12 g L-1, potassium dihydrogen phosphate 3 g L-1, initial pH 5.5, and inoculum size 10 mL 100 mL(-1). Under this condition, the predicted value of intracellular polysaccharide yield was 2.03 g L-1. Shake flask experiments confirmed that the average intracellular polysaccharide yield was 1.98 g L-1 similar to the predicted value. The yields of intracellular polysaccharides in the 5-L and 50-L fermentors were 2.59 g L-1 and 2.65 g L-1, respectively. The molecular weight distribution of intracellular and extracellular polysaccharides obtained was determined by HPSEC-MALLS-RI. The results showed that the weight-average molecular weight of component 1 in the intracellular crude polysaccharide was 4.695 x 10(6) Da and the mass fraction was 58%. The weight-average molecular weight of component 2 in the extracellular polysaccharide was 5.554 x 10(4) Da. The mass fraction was 94.9%. The liquid submerged fermentation process of G. lucidum mycelium obtained from this study has effectively increased the yield of intracellular polysaccharides. Its intracellular and extracellular polysaccharides have good immunological activity. Conceivably, the optimized process can be applied for the large-scale production.
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