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Antifungal and Proteolytic Activity and Auxin Formation of Bacterial Strains Isolated from Highland Forest Soils of Halla Mountain  

Kim, Tack-Soo (Applied Microbiology Laboratory, Agricultural Microbiology Team, NAAS, RDA)
Ko, Min-Jung (Applied Microbiology Laboratory, Agricultural Microbiology Team, NAAS, RDA)
Lee, Se-Weon (Applied Microbiology Laboratory, Agricultural Microbiology Team, NAAS, RDA)
Han, Ji-Hee (Applied Microbiology Laboratory, Agricultural Microbiology Team, NAAS, RDA)
Park, Kyung-Seok (Applied Microbiology Laboratory, Agricultural Microbiology Team, NAAS, RDA)
Park, Jin-Woo (Applied Microbiology Laboratory, Agricultural Microbiology Team, NAAS, RDA)
Publication Information
The Korean Journal of Pesticide Science / v.15, no.4, 2011 , pp. 495-501 More about this Journal
Abstract
Bacterial strains were isolated from forest soils of Halla mountain, Jeju island in Korea. The soil samples were collected at each altitude of 100m from 1,000 m above sea level. Total 398 strains were isolated and tested for their physiological characteristics of antagonistic and proteolytic activities, and auxin production. Among the isolates, 172 strains were selected as antifungal strains showing antagonistic activity against at least one of 8 plant fungal pathogens (Alternaria alternata, Botrytis cinerea, Collectotrichum acutatum, Fusarium oxysporum, Phytophthora capsici, Pythium ultimum and Sclerotinia sclerotiorum). In addition 203 strains for proteolytic activity and 26 strains for auxin production were characterized for further study. Je28-4 (Rhodococcus sp.) were showed 80% of control value against tomato gray mold in vivo. Thus, it is suggested that soil bacteria isolated from forest soils of Halla mountain can be important sources of bioactive compounds for improving plant growth or promising biocontrol agents.
Keywords
Antifungal activity; Proteolytic activity; Auxin formation; Halla mountain;
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Times Cited By KSCI : 9  (Citation Analysis)
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