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Int J Biol Macromol. 2018 Jul 1;113:1-7. doi: 10.1016/j.ijbiomac.2018.02.084. Epub 2018 Feb 16.

Characterization and antioxidant activities of polysaccharides from thirteen boletus mushrooms.

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College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China.
College of Food Science, Sichuan Agricultural University, Yaan 625014, China. Electronic address:


Water-soluble polysaccharides were extracted from the caps and stipes of thirteen boletus mushrooms representing five different species collected in Southwest China. Investigations of their structures and antioxidant activities allowed an evaluation of structure-function relationships. The polysaccharides were composed mainly of the monosaccharides arabinose, xylose, mannose, glucose and galactose. Most samples displayed a broad molecular weight range, with significant differences observed between the molecular weight ranges of the polysaccharides from the caps and the stipes. FT-IR spectral analysis of the polysaccharides revealed that most of polysaccharides from boletus mushrooms (except Boletus edulis) contained a pyranose ring. The antioxidant activities of the polysaccharides in stipes showed a significant correlation with their monosaccharide composition, and were also related to their molecular weight and anomeric configuration. Suillellus luridus collected in Pingwu, Mianyang, Sichuan, China had remarkably superior antioxidant activity and might be developed as a natural antioxidant.


Antioxidant activities; Boletus mushrooms; Polysaccharides; Structure-function relationships

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