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Endophytic Bacillus subtilis MJMP2 from Kimchi inhibits Xanthomonas oryzae pv. oryzae, the pathogen of Rice bacterial blight disease
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 Title & Authors
Endophytic Bacillus subtilis MJMP2 from Kimchi inhibits Xanthomonas oryzae pv. oryzae, the pathogen of Rice bacterial blight disease
Cheng, Jinhua; Jaiswal, Kumar Sagar; Yang, Seung Hwan; Suh, Joo-Won;
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An endophytic bacterial strain was isolated from kimchi, a Korean traditional fermented Brassica campestris and identified as Bacillus subtilis MJMP2 based on the 16S rRNA sequence. This strain showed strong antagonistic activity against Xanthomonas oryzae pv. oryzae (Xoo) KACC10331, the pathogen of bacterial rice blight disease, as well as activity against some other rice phytopathogenic fungi. The active compound was purified through size-exclusion chromatography and preparative High-performance liquid chromatography. The molecular weight was determined as m/z 1043 by mass spectroscopy, which is identical to that of iturin A. Furthermore, a crude extract from the culture supernatant of Bacillus subtilis MJMP2 showed inhibitory activity against rice blight disease in both a rice leaf explant assay and a pot assay. The crude extract also enhanced the length of roots of Arabidopsis thaliana. These results suggest that the strain Bacillus subtilis MJMP2 could be used as a biological agent to control rice blight disease.
Bacillus subtilis;Bacterial blight disease;Biocontrol;Iturin A;Xanthomonas oryzae;
 Cited by
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