The Characteristics of Toxin Production in the Korean Toxic Cyanobacteria

국내산 유독 남조류의 독소생산 특성

  • Kim, Hwa-Bin (Han River Water Environment Research Center, National Institute of Environmental Research) ;
  • Park, Hae-Kyung (Water Environment Research Department, National Institute of Environmental Research) ;
  • Shin, Kyodong (Han River Water Environment Research Center, National Institute of Environmental Research) ;
  • Moon, Jeong-Suk (Han River Water Environment Research Center, National Institute of Environmental Research)
  • 김화빈 (국립환경과학원 한강물환경연구소) ;
  • 박혜경 (국립환경과학원 물환경연구부) ;
  • 신교동 (국립환경과학원 한강물환경연구소) ;
  • 문정숙 (국립환경과학원 한강물환경연구소)
  • Received : 2010.06.24
  • Accepted : 2010.08.09
  • Published : 2010.09.30

Abstract

To find out the toxin production characteristics of Korean harmful cyanobacteria, we isolated 14 cyanobacterial strains from Korean lakes and rivers and analyzed the kinds and cellular content of microcystins (MCYSTs) of cyanobacterial isolates using cultured biomass. And we measured the MCYSTs production by growth phase of two representative toxic strains, Microcystis aeruginosa (HG-015) and Anabaena planktonica (HG-012). Among seven cyanobacteral species, Microcystis wesenbergii showed the highest cellular MCYSTs content. MCYST-RR was the most dominant toxin reaching more than 85% of MCYSTs produced by isolated cyanbacterial strains. During the mass culture, Microcystis aeruginosa (HG-015) showed the highest yield and accumulation of MCYSTs in the exponential growth phase. However the cellular content of chlorophyll a and MCYSTs of Anabaena planktonica (HG-012) showed higher value in the stationary and early death phase than in the exponential growth phase. Our results suggest that control and removal of harmful cyanobacterial bloom before exponential growth phase may be effective to prevent health risk of cyanobacterial toxins in the drinking water sources.

Keywords

Acknowledgement

Grant : 조류예보제 발령기준 적정화 방안연구

Supported by : 국립환경과학원

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