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首页> 外文期刊>Current Microbiology: An International Journal >Mycoparasitism of Endophytic Fungi Isolated From Reed on Soilborne Phytopathogenic Fungi and Production of Cell Wall-Degrading Enzymes In Vitro
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Mycoparasitism of Endophytic Fungi Isolated From Reed on Soilborne Phytopathogenic Fungi and Production of Cell Wall-Degrading Enzymes In Vitro

机译：从芦苇上分离的内生真菌在土壤中致病真菌上的分枝杆菌寄生和体外细胞壁降解酶的产生

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摘要

Antagonism of three endophytic fungi isolated from common reed (Phragmites australis) against eight soilborne pathogenic fungi was investigated on potato dextrose agar by light microscopy, scanning electron microscopy, and transmission electron microscopy. Inhibitory zones were not observed. The microscopical studies suggested that the endophytes inhibit growth of soilborne pathogens by means of coiling around hyphae and, after penetration, the degradation of hyphal cytoplasm. Since penetration of hyphae seems to play a major role in parasitism, we studied the production of cell wall degrading enzymes by the three endophytes. Choiromyces aboriginum produced higher activities of o-1,3-glucanases compared to Stachybotrys elegans and Cylindrocarpon sp. For C. aboriginum and S. elegans, colloidal chitin was the best substrate for the induction of o-1,3-glucanases and chitinases, respectively. This result suggests that mycoparasitism by endophytes on soilborne plant pathogens can be explained by their mycoparasitic activity.
机译：通过光学显微镜，扫描电子显微镜和透射电子显微镜研究了在马铃薯葡萄糖琼脂上从普通芦苇（芦苇）分离的三种内生真菌对八种土壤传播的病原真菌的拮抗作用。没有观察到抑制区。显微镜研究表明，内生菌通过在菌丝周围盘旋以及穿透后抑制菌丝细胞质的降解来抑制土壤传播的病原体的生长。由于菌丝的渗透似乎在寄生虫中起主要作用，因此我们研究了三种内生菌对细胞壁降解酶的产生。与秀丽线虫和柱状果皮菌相比，原核生物产生的o-1,3-葡聚糖酶活性更高。对于C. aboriginum和S. elegans，胶质几丁质分别是诱导o-1,3-葡聚糖酶和几丁质酶的最佳底物。该结果表明，内生菌对土壤传播的植物病原体的支原体分枝可以用其支原体活性来解释。

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