<正>对大戟科4种药用植物大戟、泽漆、乌桕、重阳木内生真菌进行分离鉴定，并检测其抑菌活性。结果表明：4种植物均含有内生菌，乌桕中获得13株内生菌，鉴定12株，分别属于丝核菌属、小菌核菌属、拟盘多毛孢属、小单头孢属、毛壳菌属、壳小圆孢属、棒盘孢属、交链孢属；京大戟中获得9株内生菌，鉴定8株，分别属于镰刀菌和交链孢属；泽漆中获得6株内生菌，鉴定4株，属于交链孢属；重阳木中获得15株内生菌，鉴定了4株，分别属于小穴壳属、壳小圆孢属、拟茎点霉属。茎中均有内生菌，种子和重阳木叶中均未分离到。总计43株内生菌中有11株有稳定的抑菌活性，占总菌株的25.58%，有12株有不稳定的抑菌活性，占27.91%。用绿豆发芽试验检验表明，仅有1株菌在绿豆幼苗上形成病斑，其余均生长良好，且21株表现出对绿豆芽的促进作用。

The effects of carbon sources on the preparation of β-glycanases were investigated. The result showed: The filter paper activity,CMCase activity, cellobiase activity and xylanase activity were 1.03 FPIU/mL, 0.54 IU/mL, 0.08 IU/mL and 149.7 IU/mL, respectively, when 15 g/L corncob employed as carbon source by Trichoderma reesei. The poor-xylanase cellulase was synthesized under 15 g/L kraft pulp as carbon source. The poor-cellulase xylanase, which was suitable for biobleaching,was formatted when the T. reesei cultivated in the same concentration of unpurified xylan,and the ratio of xylanase to CMCase was 785.4.