Liquid-fermentation conditions of a high MEP yielding Monatcus strain Mr-70 and antioxidant activity of its crude MEP were initially studied. The fermentation conditions were optimized as follows: glucose 60.0 g/L, peptone 20.0 g/L, KH,PO4 10.0 g/L, MgSO4 · 7H2O 1.1 g/L, PH 6. 5 , shatter at 200 r/min, cultured at 32 °C for 96 h. Under these conditions, the yield of MEP reached as much as 10. IS g/L in shaker flask. The scavenging rate of crude MEP adopting DPPH · Was 82.24% within 5 mg/mL, manifested that MEP of Monasau Mr-70 had fairly strong antioxidant activity.%对1株高产胞外多糖红曲霉菌株Mr-70的液态发酵条件和粗多糖抗氧化活性进行了初步研究,得到菌株Mr-70优化后的发酵工艺条件为葡葡糖60 g/L,蛋白陈20g/L,K2HPO410 g/L,MgSO4 · 7H20 1.1g/L,PH 6.5,在摇床转速200 r/min,温度32℃的条件下培养96 h,胞外粗多糖产量可达10.15 g/L；5 mg/mL的红曲霉胞外粗多糖的DPPH·清除率为82.24%,表现出较高的抗氧化活性.
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