粘柄丝膜菌多糖的提取工艺及抗氧化活性
Acta Edulis Fungi(2018)
Abstract
采用响应面法优化粘柄丝膜菌(Cortinarius collinitus)子实体多糖的超声辅助提取工艺,分别采用高效液相色谱(high performance liquid chromatography,HPLC)和气相色谱(gas chromatography,GC)进行多糖样品分子量测定和单糖组成分析;并检测多糖样品体外清除1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基和羟自由基的活性.结果表明:最佳提取工艺条件为液料比40∶1,提取温度68℃,提取时间2.6h,超声功率300 W,在此条件下粘柄丝膜菌多糖得率为5.97%,较常规水提(4.73%)提高了26%;粘柄丝膜菌多糖中糖含量为72.35%,该多糖是由鼠李糖、阿拉伯糖、木糖、甘露糖、半乳糖和葡萄糖6种单糖构成的杂多糖;800 tμg/mL多糖对DPPH自由基的清除率达71%,4 mg/mL多糖对羟自由基的清除率达63%.
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