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菌物学报  2015 

西瓜炭疽病菌圆刺盘孢分生孢子产生条件的研究

DOI: 10.13346/j.mycosystema.130147, PP. 75-81

Keywords: 圆刺盘孢,培养条件,产孢量

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Abstract:

为研究圆刺盘孢Colletotrichumorbiculare的分生孢子产生条件,通过改变培养基的成分、理化性状及培养条件等方法,进行了诱导产孢试验,并对所产生的分生孢子量进行测定。结果表明,C.orbiculare在西瓜茎叶煎汁培养基上25℃恒温黑暗培养30d可产生大量分生孢子,产孢量高达7.15×109个/mL。在显微镜下观察发现,病菌在西瓜茎叶煎汁培养基上和在西瓜茎秆病斑上产生的分生孢子在形态上存在差异,前者产生的分生孢子稍短和略宽,两端钝圆;而后者产生的分生孢子相对长而细,两端较尖。试验证明寄主西瓜茎叶成分对病菌分生孢子的产生具有明显促进作用。

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