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Abstract
A remarkable effect of validamycin on the morphology of Rhizoctonia solani was seen after 2 days culture when the fungus was cultivated in a Roux flask with standing. In accordance with the morphological change, the production of laminarinase and glucan synthetase by the fungus was affected by validamycin.
The production of laminarinase was increased in the culture filtrate, and significantly decreased in the mycelium in the presence of validamycin. While the intracellular production of glucan synthetase in the culture with validamycin (10~50μg/ml) increased by 40~60% compared with that in the control culture.
