AI Article Synopsis
- The study examined the antagonistic effects of three endophytic fungi from common reed against eight soilborne pathogenic fungi using various microscopy techniques.
- No inhibitory zones were detected, but microscopic observations indicated that these endophytes suppress pathogen growth by coiling around and penetrating their hyphae, leading to degradation.
- Among the endophytes, Choiromyces aboriginum showed the highest production of beta-1,3-glucanases, especially when induced by colloidal chitin, highlighting the role of mycoparasitism in combating plant pathogens.
Article Abstract
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 beta-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 beta-1,3-glucanases and chitinases, respectively. This result suggests that mycoparasitism by endophytes on soilborne plant pathogens can be explained by their mycoparasitic activity.
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