【摘要】 研究了节丛孢Arthrobotrys、单顶孢Monacrosporium和隔指孢Dactylella三个捕食线虫丝孢菌属16个菌株,对水稻立枯丝核菌RhizoctoniasolaniAG1、大豆核盘菌Sclerotiniasclerotiorum、茄科镰刀菌Fusariumsolani和恶疫霉Phytophthoracactorum四种常见土壤植物病原真菌的菌寄生性。结果表明供试菌可以通过弹簧式菌丝圈缠绕、类附着胞结构吸附、简单的菌丝缠绕或者贴附寄主菌丝生长四种方式寄生病原菌。其中,绝大多数菌株对立枯丝核病菌有寄生作用,一些供试真菌对其它三种病原真菌有寄生现象。利用孢子液浸泡法测定了其中5种捕食线虫真菌对核盘菌菌核的寄生能力,显示有较高寄生率。更多还原

【Abstract】 Sixteen isolates of nematode-trapping fungi, representing different trapping organs, were selected from Arthrobotrys spp., Monacrosporium spp., Dactylella spp. to determine their mycoparasitism against Rhizoctonia solani, Sclerotinia sclerotiorum, Fusarium solani and Phytophthora cactorum. It was found that nematode-trapping fungal isolates were able to parasitize soil-borne plant pathogens by spring-like coiling ring, appressorium-like structure, simple hyphal-coil or sticky growth in dual cultures. Most isolates could parasitize hyphae of R. solani. Among them, A. vermicola, M. sinense, D. iridis and A. oligospora were demonstrated to form more abundant coiling rings. In contrary to R. solani, several isolates parasitized the other three host-fungi at low level. M. janus parasitized hyphae of S. sclerotiorum by coiling ring. M. drechsleri and A. brochopaga were observed to be no effect on soil-borne plant pathogens tested. On sclerotia of S. sclerotiorum, five nematode-trapping fungi isolates showed high mycoparasitism.更多还原