KMID : 1160220150430030333
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Mycobiology 2015 Volume.43 No. 3 p.333 ~ p.338
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Antifungal Substances from Streptomyces sp. A3265 Antagonistic to Plant Pathogenic Fungi
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Minh Nguyen Van
Woo E-Eum Kim Ji-Yul Kim Dae-Won Hwang Byung-Soon Lee Yoon-Ju Lee In-Kyoung Yun Bong-Sik
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Abstract
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In a previous study, we identified a Streptomyces sp., A3265, as exhibiting potent antifungal activity against various plant pathogenic fungi, including Botrytis cinerea, Colletotrichum gloeosporioides, and Rhizoctonia solani. This strain also exhibited a biocontrolling effect against ginseng root rot and damping-off disease, common diseases of ginseng and other crops. In this study, we isolated two antifungal substances responsible for this biocontrolling effect via Diaion HP-20 and Sephadex LH-20 column chromatography, medium pressure liquid chromatography, and high-performance liquid chromatography. These compounds were identified as guanidylfungin A and methyl guanidylfungin A by spectroscopic methods. These compounds exhibited potent antimicrobial activity against various plant pathogenic fungi as well as against bacteria.
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KEYWORD
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Biocontrol agent, Damping-off, Guanidylfungin, Streptomyces sp. A3265
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