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Title 

Biological control agent of common scab disease by antagonistic strain Bacillus sp. sunhua

Authors 

J S HanJ H ChengT M YoonJ SongA RajkarnikarWon Gon KimIck Dong YooY Y YangJ W Suh

Publisher 

Wiley-Blackwell

Issue Date 

2005

Citation 

Journal of Applied Microbiology, vol. 99, no. 1, pp. 213-221

Keywords 

biological controlcommon scab diseaseiturin Amacrolactin Astreptomyces scabieifungal diseasebacillusbacillus sunhuabacterial strainbiological control agent

Abstract 

Aims: To identify an antagonistic strain against Streptomyces scabiei and to characterize the antibiotic agent. The efficacy of the isolated strain in controlling common scab disease was also evaluated. Methods and Results: A bacterial strain antagonistic against S. scabiei was isolated from the soil of a potato-cultivating area. This bacterium was identified as a Bacillus species by 16S rRNA gene sequence analysis and was designated Bacillus sp, sunhua. Antibiotics produced by this strain were proven to be stable within a broad pH range and at high temperatures. The culture broth was extracted with ethyl acetate, and then the crude extract was applied to HPLC. Two compounds were isolated and identified as iturin A and macrolactin A by 1H-NMR, 13C-NMR, HMBC, HMQC and mass spectrometer. The culture broth of Bacillus sp. sunhua had a suppressive effect on common scab disease in a pot assay, decreasing the infection rate from 75 to 35%. This strain also suppressed Fusarium oxysporum, the pathogen of potato dry rot disease. Conclusions: Bacillus sp. sunhua was shown to inhibit S. scabiei effectively. Significance and Impact of the Study: This is the first report demonstrating that macrolactin A and iturin A inhibit S. scabiei. This study demonstrated the possibility of controlling potato scab disease using Bacillus sp. sunhua.

ISSN 

1364-5072

Link 

http://dx.doi.org/10.1111/j.1365-2672.2005.02614.x

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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