Analysis of antioxidant components of Grifola frondosa solid fermented substrates

Grifola frondosa was cultured on the solid medium using oat,wheat bran,soybeans,corn,rice and buckwheat as substrates.The best fermentation time was determined and antioxidant components of substrate was analyzed.The results show that the best antioxidant fermentation substrate of Grifola frondosa was oats and soybean(16.25% oats and 83.75% soybean),and the best fermentation time was 8d.The antioxidant components of Grifola frondosa in oat and soybean medium were rich in varieties and high in contents,which included flavonoids 40.86μg/g,total triterpenoid 5.94mg/g,total polyphenols 8.51mg/g,reducing sugar 13.10mg/g,anthocyanins 70.23μg/g,Vitamin C 24.57mg/g,Vitamin E 0.33mg/g.and glutathione(GSH) 0.84g/g,and SOD activity was 299.74U/g.