College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China.
Int J Biol Macromol. 2018 Jul 1;113:1-7. doi: 10.1016/j.ijbiomac.2018.02.084. Epub 2018 Feb 16.
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.
从中国西南部采集的代表五个不同种的 13 种牛肝菌的菌盖和菌柄中提取了水溶性多糖。对其结构和抗氧化活性的研究评价了结构-功能关系。多糖主要由单糖阿拉伯糖、木糖、甘露糖、葡萄糖和半乳糖组成。大多数样品显示出较宽的分子量范围，菌盖和菌柄多糖的分子量范围有显著差异。多糖的傅里叶变换红外光谱分析表明，除牛肝菌（Boletus edulis）外，大多数牛肝菌多糖含有吡喃糖环。菌柄多糖的抗氧化活性与其单糖组成有显著的相关性，也与其分子量和端基构型有关。采自四川绵阳平武的中国绿蝉具有显著的抗氧化活性，可能被开发为天然抗氧化剂。
