Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Growth Characteristics for Toxic Marine Dinoflagellate Alexandrium catenella Isolated from Jinhae Bay, Korea

진해만의 유독 플랑크톤 Alexandrium catenella의 성장특성

  • Lee, Hae-Ok (Department of Life Sciences, College of Natural Sciences, Hanyang University) ;
  • Lee, Na-Woon (Department of Environmental Science, College of Natural Sciences, Hanyang University) ;
  • Katano, Toshiya (Department of Life Sciences, College of Natural Sciences, Hanyang University) ;
  • Han, Myung-Soo (Department of Life Sciences, College of Natural Sciences, Hanyang University)
  • Published : 2006.06.01
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Abstract

Effects of water temperature, salinity and irradiance on the growth of toxic dinoflagellate Alexandrium catenella (AlCt-01) were investigated, which was isolated from Jinhae Bay, Korea. The maximum growth of A. catenella strain was obtained at $150{\mu}E\;m^{-2}s^{-1}$. The ranges of temperature and salinity for the growth of the strain were $15\sim25^{\circ}C$ and $20\sim34$ PSU. The maximum growth rate of A. catenella determined was $0.45d^{-1}$ at $20^{\circ}C$, 30 PSU and $150{\mu}E\;m^{-2}s^{-1}$ We also examined the Se and Fe effects on the toxic dinoflagellate A. catenella in optimal growth conditions. As Fe concentration of medium increased from 0 to $11.7{\mu}M$, growth rate of A. catenella increased and the maximum growth rate(k=0.48 $d^{-1}$) was obtained at $11.7{\mu}M$ of Fe cone. Growth of A. catenella were stimulated at> 1nM of Se.

한국 진해만에서 분리한 마비성패독 원인종의 하나인 Alexandrium catenella (AlCt-01) 최적 성장특성을 규명하기 위해 온도, 염분, 광도의 다양한 조건에서 A. catenella 성장을 조사하였다. $50\sim150{\mu}E\;m^{-2}s^{-1}$까지는 광도가 증가함에 따라 A. catenella 성장도 증가하였으나 $50\sim150{\mu}E\;m^{-2}s^{-1}$ 이상의 광도에서는 A. catenella 성장이 일정하게 유지하였다. 온도는 $15\sim25^{\circ}C$에서 성장하였고 $20^{\circ}C$에서 가장 잘 성장하였다. A. catenella는 25 PSU까지는 염분이 증가함에 따라 성장률도 증가하였으나 그 이상의 염분 농도에서는 성장이 일정하거나 감소하였다. 본 연구를 통한 A. catenella 최적 성장조건은 $50\sim150{\mu}E\;m^{-2}s^{-1}$, 30 PSU, $20^{\circ}C$에서 가장 높은 성장률 $k=0.45\;d^{-1}$을 나타내었다. 최적 성장조건에서 셀레니움과 철의 다양한 농도에 따라 A. catenella 성장특성을 조사하였는데 철농도는 $11.7{\mu}M$에서 최대값을 나타내었고 $(k=0.48\;d^{-1})$, $11.7{\mu}M$ 보다 낮은 농도에서는 철농도가 감소할수록 A. catenella 성장률도 감소하였다. A. catenella는 $10^{-3}\sim0.1{\mu}M$ 셀레니움 농도에서 A. catenella 세포밀도가 증가하고 대수성 장기 후반(the end of exponential phase)이 길어짐을 관찰 하였다.

Keywords

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