토양 분리 방선균 Streptomyces griseofuscus 200401의고추 생육 촉진과 역병 발생 억제 효과 = Effects of Streptomyces griseofuscus 200401 on Growth of Pepper Plants and Phytophthora Blight by Phytophthora capsici

다국어 초록 (Multilingual Abstract)

The microorganisms with the antifungal activity against Phytophthora capsici and Colletotrichum acutatum
and the plant growth-promoting activity were screened from a forest and natural fields of Gajang-Dong,
Sangju-city. One of the isolates, Streptomyces griseofuscus 200401, was selected as a good plant growthpromoting
strain in this study. In greenhouse test, the number of leaf, fresh weight, and dry weight of pepper
plants, that were grown with treatment of culture suspension or powder containing S. griseofuscus 200401,
were higher than those without the bacterial cells. Cultivation of S. griseofuscus 200401 strain for 7 days in a
nutrient rich medium produced ammonium chloride up to 0.13 μg/ml in the culture solution of S. griseofuscus.
Treatment of the selected strain significantly reduced the severity of the late blight of pepper plants to show
the equivalent disease control activity to chemical fungicide. This study suggests that S. griseofuscus 200401
strain could be a potential biological agent with the biocontrol activity and the plant growth-promoting
activity.

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