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Microbiology and Biotechnology Letters

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Microbiol. Biotechnol. Lett. 1996; 24(3): 261-267

Chitosan이 사과 겹무늬썩음병균 Botryosphaeria dothidea의 생육에 미치는 영향

Chitosan이 사과 겹무늬썩음병균 Botryosphaeria dothidea의 생육에 미치는 영향

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To examine the potential utilization of chitosan, the biodegradable natural polymer, as a control agent of apple white rot caused by Botryosphaeria dothidea in a new control measure by coating it on the diseased branches, the various antifungal activities of chitosan was investigated. Chitosan showed significant inhibitory effect on the mycelial growth of B. dothidea, along with the morphological changes including hyphal swelling and ultrastructural changes on solid PDA medium. In liquid PD broth medium, the chitosan showed more significant effect on the growth of B. dothidea also forming cell clusters indicating affection on the hyphal extension. The growth of B. dothidea was inhibited more than 90% at the concentration of 1.0 mg/ml. Chitosan also detained the spore germination and induced the morphological change of germ tubes. Glucosamine, monomer of chitosan, did not affect on the growth of B. dothidea indicating the antifungal activity was caused by chitosan polymer.

Keywords: Botryosphaeria dothidea, apple white rot, chitosan, antifungal activity

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