Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Effects of the Temperature and Light Intensity on the Growth and Microcystin Production of Three Species of Microcystis (M. aeruginosa, M. ichthyoblabe, M. viridis)

Microcystis 3종(M. aeruginosa, M. ichthyoblabe, M. viridis)의 성장과 microcystins 생성에 대한 온도 및 조도의 영향

  • Lee, Kyung-Lak (Department of Forensic Medicine, National Institute of Scientific Investigation) ;
  • Jheong, Weon-Hwa (Water Supply and Sewerage Research Division, National Institute of Environmental Research) ;
  • Kim, Jin-Hee (Non-vascular Plants Research Division, National Institute of Biological Resources) ;
  • Kim, Han-Soon (Department of Biology, Kyungpook National University)
  • 이경락 (국립과학수사연구소 법의학과) ;
  • 정원화 (국립환경과학원 상하수도연구과) ;
  • 김진희 (국립생물자원관 하등식물연구과) ;
  • 김한순 (경북대학교 생명과학부)
  • Received : 2010.07.30
  • Accepted : 2010.08.30
  • Published : 2010.09.30
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Abstract

The growth and microcystins production characteristics of three species of Microcystis (M. aeruginosa, M. ichthyoblabe, M. viridis) isolated from Yeongchun dam and Ankei dam in Kyungpook Province, South Korea were investigated at temperatures of $15{\sim}35^{\circ}C$ and light intensities of $35{\sim}180\;{\mu}mol\;m^{-2}\;s^{-1}$. All of the three species exhibited the highest growth rates (${\mu}_{max}$) over the $30^{\circ}C$. The maximum growth rates of M. aeruginosa and M. ichthyoblabe was observed at $70\;{\mu}mol\;m^{-2}\;s^{-1}$, while M. viridis showed maximum growth rate at $35\;{\mu}mol\;m^{-2}\;s^{-1}$. The maximum production of total microcystins was observed at $20^{\circ}C$, and the production of microcystins decreased according as temperature increase. The highest microcystins production of M. aeruginosa, M. ichthyoblabe and M. viridis observed at light intensities of $120\;{\mu}mol\;m^{-2}\;s^{-1}$, $70\;{\mu}mol\;m^{-2}\;s^{-1}$ and $35\;{\mu}mol\;m^{-2}\;s^{-1}$, respectively. The concentration of microcyst in production and microcystin types of three species according to temperatures and light intensities showed clear difference between the species.

수화가 발생한 영천댐과 안계댐에서 분리한 Microcystis (M. aeruginosa, M. ichthyoblabe, M. viridis) 3종의 온도 및 조도에 대한 성장률과 microcystins 생성 특성을 알아보기 위해 배양실험을 실시하였다. 성장률은 3종 모두 $30^{\circ}C$ 이상에서 최고값을 나타내었으나 microcystins은 $20^{\circ}C$에서 최대로 생성되었으며, 온도가 증가할수록 microcystins 생성은 감소하였다. Microcystis aeruginosa와 M. ichthyoblabe은 $70\;{\mu}mol\;m^{-2}\;s^{-1}$의 광 조건에서 최대성장률을 나타낸 반면, M. viridis은 $35\;{\mu}mol\;m^{-2}\;s^{-1}$의 광 조건에서 최대성장률을 나타내었다. Microcystis aeruginosa, M. ichthyoblabe 및 M. viridis는 각각 $120\;{\mu}mol\;m^{-2}\;s^{-1}$, $70\;{\mu}mol\;m^{-2}\;s^{-1}$ 그리고 $35\;{\mu}mol\;m^{-2}\;s^{-1}$의 광 조건에서 최대의 microcystins를 생성하였다. 온도와 조도에 대한 이들 3종의 microcystins 생성정도와 microcystins 타입은 종간에 뚜렷한 차이를 나타내는 종 특이성을 보였다.

Keywords

References

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