中文摘要：

生活在宿主植物里的内生真菌是很重要的药用资源。喜树是中国的传统药用植物。从喜树植物中分离得到了大约50种菌株，其中一株产喜树碱的菌株通过形态学鉴定为青霉属，这是首次在喜树植物中发现产喜树碱的青霉属菌株。为研究简单序列重复相关序列扩增多态性（SRAP）方法在喜树内生真菌中应用的可行性，选择了十株喜树内生真菌进行SRAP多态性分析。SRAP引物共扩增出1295条带，而这些菌株也被分为三大类。这些结果表明，SRAP研究喜树内生真菌具有高效性，是讨论喜树内生真菌的遗传多样性的有效方法。

英文摘要：

Endophytic fungi, lived in stems and leaves of host plants, were supposed to be effective or novel sources for therapeutic compounds. Camptotheca acuminata Decne is a traditional medical plant in China. About 50 endophytic fungi were isolated from barks of C. acuminata. A new fungus producing camptothecin （CPT） was identified as a Penicillium based on its morphological features. Ten endophytic fungi of C. acuminata were chosen to be amplified using molecular maker sequence related amplified polymorphism （SRAP）. The combinations of SRAP primers turned out to be polymorphic and a total of 1 295 polymorphic bands were obtained. These strains were grouped into 3 main clusters and revealed that SRAP could isolate the strains of C. acuminata efficiently. It also provided evidence for discussing the genetic diversities of species in C. acuminata with SRAP molecular method.