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논문 기본 정보

자료유형
학술저널
저자정보
Md. Nurul Islam (Yeungnam University) Md. Sarafat Ali (Yeungnam University) Seong-Jin Choi (Catholic University of Daegu) Jae-Wook Hyun (Rural Development Administration) Kwang-Hyun Baek (Yeungnam University)
저널정보
한국식물병리학회 The Plant Pathology Journal The Plant Pathology Journal 제35권 제5호
발행연도
2019.10
수록면
486 - 497 (12page)

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초록· 키워드

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Citrus canker is a devastating disease of citrus caused by Xanthomonas citri subsp. citri (Xcc). A total of 134 endophytic bacteria were isolated from various gymnospermic and angiospermic plants. They were screened for their antagonistic activities against three wild-type and six streptomycin-resistant Xcc strains. TbL-22 and TbL-26, both later identified as Bacillus thuringiensis, inhibited all the wild and resistant Xcc strains. TbL-22 exerted the highest antagonistic activity against XccW3 and XccM6 with inhibition zones of 20.64 ± 0.69 and 19.91 ± 0.87 mm, respectively. Similarly ethyl acetate extract of TbL-22 showed highest inhibition zones 15.31 ± 2.08 and 19.37 ± 3.17 mm against XccW3 and XccM6, respectively. TbL-22 reduced canker incidence on infected leaves by 64.05% relative to positive controls. Scanning electron microscopy revealed that the cell membranes of Xcc treated with ethyl acetate extract of TbL-22 were ruptured, lysed, and swollen. B. thuringiensis TbL-22 can effectively and sustainably controls streptomycin-resistant citrus canker.

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