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자료유형
학술저널
저자정보
Jung, Byung Kwon (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University) Hong, Sung-Jun (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University) Park, Gun-Seok (Department of Biomedical Engineering, The University of Texas at Austin) Kim, Min-Chul (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University) Shin, Jae-Ho (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University)
저널정보
한국응용생명화학회 Applied Biological Chemistry Applied Biological Chemistry 제61권 제2호
발행연도
2018.1
수록면
173 - 180 (8page)

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Burkholderia species are widely distributed across wide ecological niches. Many genera of Burkholderia are known to be associated with plants and are involved in processes such as suppression of soil-borne pathogens, acceleration of plant growth and endophytic colonization. In the present study, a strain belonging to the Burkholderia cepacia complex, which was termed JBK9, was isolated. The strain JBK9 showed broad-spectrum antifungal activities against Phytophthora capsici, Fusarium oxysporum, and Rhizoctonia solani, which are representative phytopathogenic fungi, inhibiting their growth by 59.56, 51.92, and 34.22%, respectively. The strain produced an antifungal compound that was confirmed to be pyrrolnitrin by TLC, HPLC, and NMR analyses. Using an in vitro assay for plant root colonization, we observed that the population densities of B. cepacia JBK9 on the upper 1 cm of host plant roots were significantly different between Burkholderia species. The high motility of these strains is likely to have contributed to their efficient root colonization. The isolated strain was evaluated in vivo for its ability to control Phytophthora blight via a pot test. Compared with Burkholderia strains KCTC 2973 and ATCC 25416, B. cepacia JBK9 demonstrated a stronger antifungal activity against P. capsici. The strain B. cepacia JBK9 could be further developed as a biological control agent for pepper plants.

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