Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Colonizing Ability of Pseudomonas fluorescens 2112, Among Collections of 2,4-Diacetylphloroglucinol-Producing Pseudomonas fluorescens spp. in Pea Rhizosphere

  • Kim, Sang-Dal (School of Biotechnology, Yeungnam University) ;
  • Fuente, Leonardo De La (Department of Entomology and Plant Pathology, Auburn University) ;
  • Weller, David M. (Department of Plant Pathology, USDA-ARS, Root Disease and Biological Control Research Unit, Washington State University) ;
  • Thomashow, Linda S. (Department of Plant Pathology, USDA-ARS, Root Disease and Biological Control Research Unit, Washington State University)
  • Received : 2011.12.19
  • Accepted : 2012.02.17
  • Published : 2012.06.28
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Abstract

Pseudomonas fluorescens 2112, isolated in Korea as an indigenous antagonistic bacteria, can produce 2,4-diacetylphloroglucinol (2,4-DAPG) and the siderophore pyoveridin2112 for the control of phytophthora blight of red-pepper. P. fluorescens 2112 was classified into a new genotype C among the 17 genotypes of 2,4-DAPG producers, by phlD restriction fragment length polymorphism (RFLP). The colonizing ability of P. fluorescens 2112 in pea rhizosphere was equal to the well-known pea colonizers, P. fluorescens Q8r1 (genotype D) and MVP1-4 (genotype P), after 6 cycling cultivations for 18 weeks. Four tested 2,4-DAPG-producing Pseudomonas spp. could colonize with about a 96% dominance ratio against total bacteria in pea rhizosphere. The strain P. fluorescens 2112 was as good a colonizer as other Pseudomonas spp. genotypes in pea plant growth-promoting rhizobacteria.

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References

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