Methods Cultured 3 strains of edible fungi in liquid medium, and reserved it for two years, then to detect the SOD activities by autoxidation of pyrogallic acid.

• 方法选取3株实验室保存的食用真菌，经液体培养后，长期保存于液体培养基中2年，用邻苯三酚法检测各培养液的SOD酶活性。