Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Monitoring Expression of bphC Gene from Ralstonia eutropha H85O Induced by Plant Terpenes in Soil

  • Jung, Kyung-Ja (Division of Civil Environmental Systems Engineering, Korea Maritime University) ;
  • Kim, Byung-Hyuk (Division of Civil Environmental Systems Engineering, Korea Maritime University) ;
  • Kim, Eungbin (Department of Biology, Yonsei University) ;
  • So, Jae-Seong (Department of Biological Engineering and Center for Advanced Bioseparation Technology, Inha University) ;
  • Koh, Sung-Cheol (Division of Civil Environmental Systems Engineering, Korea Maritime University)
  • Published : 2002.12.01
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Abstract

A PCB degrader, Ralstonia eutropha H850 was shown to induce bphC gene encoding 2,3-dihydroxy-biphenyl-1,2-dioxygenase in a carvone-amended pure culture in our previous study (Park et al.,1999). The present study was carried out to examine how plant terpenes, as natural substrates, would cause an expression of a PCB degradative gene in soil that was amended with terpenes. The population of Ralstonia eutropha H850 was maintained at least around 10$\^$8/ (CFU/g fresh soil) in the soil amended with carvone or limonene in the presence of succinate as a growth substrate at 50 th day. The gene expression was monitored by RT-PCR using total RNA directly extracted from each soil and bphC gene primers. The bphC gene expression of the seeded strain H850 was observed in the soil amended with biphenyl (4 days) but not with succinate, carvone and limonene. These results indicate that terpenes widely distributed in nature could be a potential inducing substrate for effective PCB biodegration in the soil but their bioavailability and specific induction behavior should be taken into account before PCB bioremediation implementation.

Keywords

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