Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Identification and Characterization of Novel Biocontrol Bacterial Strains

  • Lee, Seung Hwan (Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University) ;
  • Kim, In Seon (Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University) ;
  • Kim, Young Cheol (Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University)
  • Received : 2014.06.16
  • Accepted : 2014.08.26
  • Published : 2014.09.30
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Abstract

Because bacterial isolates from only a few genera have been developed commercially as biopesticides, discovery and characterization of novel bacterial strains will be a key to market expansion. Our previous screen using plant bioassays identified 24 novel biocontrol isolates representing 12 different genera. In this study, we characterized the 3 isolates showing the best biocontrol activities. The isolates were Pantoea dispersa WCU35, Proteus myxofaciens WCU244, and Exiguobacterium acetylicum WCU292 based on 16S rRNA sequence analysis. The isolates showed differential production of extracellular enzymes, antimicrobial activity against various fungal or bacterial plant pathogens, and induced systemic resistance activity against tomato gray mold disease caused by Botrytis cinerea. E. acetylicum WCU292 lacked strong in vitro antimicrobial activity against plant pathogens, but induced systemic resistance against tomato gray mold disease. These results confirm that the trait of biological control is found in a wide variety of bacterial genera.

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References

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