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KMID : 1098420120200050339
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Korean Journal of Medicinal Crop Science
2012 Volume.20 No. 5 p.339 ~ p.344
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Screening of Antifungal Bacillus spp. against Alternaria Blight Pathogen (Alternaria panax) and Anthracnose Pathogen (Colletotrichum gloeosporioides) of Ginseng
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Lee Hye-Jin
Park Kee-Choon
Lee Seung-Ho
Bang Kyong-Hwan
Park Hong-Woo
Hyun Dong-Yun
Kang Seung-Won
Cha Sun-Woo
Chung Ill-Min
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Abstract
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This study was carried out to research microorganisms having the antifungal activity against ginseng Alternaria blight pathogen Alternaria panax and ginseng anthracnose pathogen Colletotrichum gloeosporioides. Eleven Bacillus strains. were isolated from Korean traditional soybean paste and Kimchi. Among the 11 isolates, DJ5, KC1, KC2 and KC4 showing antagonistic activity on the mycelial growth of A. panax and C. gloeosporioides in pairing culture were finally selected as the antagonistic microorganisms. Based on 16s rRNA sequence and phylogenetic tree analysis, they were identified as Bacillus spp.. The selected microorganisms were investigated antagonistic activity by measured leaf-segment colonization in pot test. When Bacillus sp. were injected after A. panax treatment, KC1, KC2 and KC4 showed similar effect to chemical pesticides treated control. To measure preventive effect of Bacillus sp, antagonistic microorganisms were injected and C. gloeosporioides was treated in pot. When measuring the effectiveness for the prevention of Anthracnose, All Bacillus spp. showed approximately 83~90 % degree of superior preventive effect. In general, The four Bacillus spp. isolated from Korean traditional fermented foods showed therapeutic effect of Alternaria blight and preventive effect of Anthracnose.
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KEYWORD
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Ginseng, Bacillus, Antagonistic Microorganism, Alternaria panax, Colletotrichum gloeosporioides, Biological Control
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