Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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The Effects of the Light Quality of a Light Emitting Diode (LED) on the Phosphate Uptake of Prasinophytes Tetraselmis suecica and Tetraselmis tetrathele

담녹조강 Tetraselmis suecica와 Tetraselmis tetrathele의 인산염 흡수에 미치는 발광다이오드 파장의 영향

  • Han, Kyong Ha (Department of Oceanography, Pukyong National University) ;
  • Oh, Seok Jin (Department of Oceanography, Pukyong National University)
  • Received : 2019.01.31
  • Accepted : 2019.02.25
  • Published : 2019.02.28
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Abstract

This study was conducted to investigate the effects of the light quality of a Light Emitting Diode (LED) on the phosphate uptake of Prasinophytes Tetraselmis suecica and Tetraselmis tetrathele. These species were exposed to a blue LED (max = 450 nm), a yellow LED (max = 590 nm), a red LED (max = 630 nm) and a fluorescent lamp (control) at $100{\mu}mol\;m^{-2}\;s^{-1}$. The maximum uptake rates (${\rho}_{max}$) of T. suecica and T. tetrathele under the red LED were $6.35pmol\;cell^{-1}\;hr^{-1}$ and $9.85pmol\;cell^{-1}\;hr^{-1}$, respectively. The half saturation constants (Ks) of two species were $9.43{\mu}M$ and $21.2{\mu}M$, respectively. The phosphate affinity of the two species under the red LED was higher than that of other wavelengths. Thus, the optimum light source to ensure economically effective and productive growth in a Tetraselmis culture system (Photo-Bioreactor) would be red LEDs because of the high growth rate shown, regardless of relatively low nutrient conditions.

본 연구는 담녹조강 Tetraselmis suecica와 T. tetrathele의 인산염 흡수에 미치는 발광다이오드의 파장의 영향을 조사하였다. 파장은 청색 발광다이오드(LED; 450 nm), 황색 LED(590 nm), 적색 LED(630 nm) 그리고 형광램프(control)이며, 조도는 $100{\mu}mol\;m^{-2}\;s^{-1}$로 주사하였다. T. suecica와 T. tetrathele의 최대흡수속도(${\rho}_{max}$)는 적색 LED에서 $6.35pmol\;cell^{-1}\;hr^{-1}$와 $9.85pmol\;cell^{-1}\;hr^{-1}$로 나타났으며, 반포화농도(Ks)는 $9.43{\mu}M$와 $21.2{\mu}M$로 나타났다. 이는 적색 LED 아래에서 T. suecica와 T. tetrathele가 다른 파장보다 영양염에 대한 친화성이 높다는 것으로 의미한다. 따라서 경제성 및 생산성 향상을 위한 Tetraselmis 배양시스템(광배양기)의 최적 광원은 낮은 영양염 상태에서도 높은 생장속도를 보이는 적색 LED가 적합할 것으로 판단된다.

Keywords

References

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