两种不同形态猪苓菌核液体发酵生产胞外多糖的分析

Exopolysaccharide Production by Liquid Fermentation of Two Polyporus umbellatus

对2种不同形态猪苓（Polyporus umbellatus）菌核液体发酵生产胞外多糖进行了研究.结果表明,猪苓菌核液体发酵生产胞外多糖的发酵条件是温度28℃,pH 4.8～5.5,振荡速度110 r/min,通气量4L/min,罐压0.090 0 MPa,发酵7d,每12h取样测其胞外多糖的含量,在72 h和60h时猪苓（FrCM2）和猪苓（FrCM3）液体发酵产胞外多糖的含量分别为1.783和0.044 mg/mL,猪苓（FrCM2）液体发酵产胞外多糖含量明显高于猪苓（FrCM3）.

The exopolysaccharide of two Polyporus umbellatus by liquid fermentation was analyzed. The results showed when fermented 7 d under 28 ℃ and pH 4.8-5.5 with rotational speed 110 r/min, ventilation quantity 4 L/min and pot press 0.0900 MPa, the exopolysaccharide content of P. umbellatus（FrCM2） and P. umbellatus（FrCMz） reached peak at 72 h and 60 h, and the contents were o 1.783 mg/mL and 0.044 mg/mL respectively. It indicated that the contents of exopolysaccharide of P.umbellatus（FrCM2） were significantly higher than that of P.s umbellatus（FrCM2）.