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

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Effects of Light Wavelengths on the Growth and Paralytic Shellfish Toxin Production of Alexandrium catenella and A. pacificum

유독 와편모조류 Alexandrium catenella와 A. pacifcium의 생장과 마비성 독소 생산에 미치는 빛의 파장의 영향

  • Nam, Ki Taek (Department of Oceanography, Pukyong National University) ;
  • Kim, Seok-Yun (Department of Oceanography, Pukyong National University) ;
  • Moon, Chang-Ho (Department of Oceanography, Pukyong National University) ;
  • Kim, Chang-Hoon (Department of Marine Bio-materials and Aquaculture, Pukyong National University) ;
  • Oh, Seok Jin (Department of Oceanography, Pukyong National University)
  • Received : 2020.01.06
  • Accepted : 2020.02.25
  • Published : 2020.02.28
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Abstract

To supply a stable amount of standard material to detect paralytic shellfish toxin (PST), we examined possible increases in toxic content in Alexandrium catenella and A. pacificum using a light emitting diode (LED), which is one of the most eco-friendly and economical lighting method. When comparing the growth rates of organisms and wavelengths of light used, the half saturation constants (Ks) of red wavelength were higher than those of other wavelengths. In contrast, the Ks of blue wavelength were lower than those of other wavelengths. Moreover, when comparing the toxic contents and wavelengths of light used, red wavelength produced approximately 8 times more toxic content in A. catenella and approximately 3.2 times more toxic content in A. pacificum than other wavelengths. Thus, the toxic content present in the organism might be closely related to the Ks of light. The optimum light source to be used to ensure economically ef ective and productive growth in an Alexandrium culture system (photo-bioreactor) would likely consist of a two-phase culture, wherein a blue LED is used during the lag and exponential phases to increase growth rates, followed by the use of a red LED during late exponential and stationary phases to achieve increased PST yields.

본 연구는 마비성 독소 표준물질의 안정적인 공급을 위해 친환경적이고 경제성이 우수한 발광다이오드 광원의 파장을 이용하여, PST의 원인종 Alexandrium catenella와 A. pacificum의 독 함량을 증대시킬 수 있는 가능성을 살펴보았다. 파장별 광량과 생장속도의 관계를 보면, 반포화상수(Ks)는 두 종 모두 적색파장에서 가장 높게 나타났고, 청색파장에서 가장 낮았다. 빛 파장에 따른 독함량의 경우, 적색 파장이 A. catenalla은 최고 약 8배 그리고 A. pacificum은 약 3.4배 다른 파장보다 높았다. 그리고 광량에 대한 친화성을 나타내는 Ks와 독농도와 밀접한 관련이 있는 것으로 나타났다. 따라서 세포당 독농도 증가를 위한 배양법은 초기에 세포수량의 확보 및 빠른 생장속도를 유도하기 위해서 청색파장을, 대수생장기 후기에는 적색파장을 주사하여, 세포내 독함유량을 증가시킬 수 있는 2단계 배양법을 제시할 수 있을 것으로 생각된다.

Keywords

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