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国际药用蘑菇期刊
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ISSN 打印: 1521-9437
ISSN 在线: 1940-4344

国际药用蘑菇期刊

DOI: 10.1615/IntJMedMushrooms.v17.i9.60
pages 857-866

Optimization, Purification, Characterization, and Antioxidant Activity of Exopolysaccharide Produced by the Northern Tooth Mushroom, Climacodon septentrionalis (Basidiomycota)

Xuewei Jia
College of Food and Biological Engineering, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou 450001, PR China; Collaborative Innovation Center of Food Production and Safety, Zhengzhou, Henan, China
Kai Zheng
Xuchang Cigarette Factory, China Tobacco Henan Industry Co. Ltd, Xuchang, Henan, China
Shuai Liu
College of Life Sciences, Henan Normal University, Henan, China
Chunping Xu
College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, China; Collaborative Innovation Center of Food Production and Safety, Zhengzhou, Henan, China

ABSTRACT

The optimization, purification, and characterization of exopolysaccharide (EPS) from Climacodon septentrionalis were investigated. The results showed that the optimal incubation time was 8 days for EPS production by C. septentrionalis; maltose and soy extract were the best carbon and nitrogen sources, respectively. One kind of EPS fraction was purified; it had a molecular weight of about 3.4 × 105 Da and mainly comprised glucose (98%). The main structure of EPS is α-glucopyranose. In addition, the EPS showed good antioxidant properties in vitro. The thermal stability of EPS also was investigated, and the results suggest that to maintain its bioactivity the processing temperature of EPS should not be more than 200°C. The structural characteristics of EPS, such as molecular weight, functional groups, monosaccharide constituents, and configuration of the glycosidic bond give EPS great potential for application as a natural antioxidant material in health, food, and therapeutics.


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