The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Host-Parasite System in a Red Tide Dinoflagellate Prorocentrum minimum: (1) Life Cycle Stages of the Parasitic Dinoflagellate Amoebophrya sp.

적조생물 Prorocentrum minimum의 숙주-기생자 배양체: (1) 기생성 와편모류 Amoebophrya sp.의 생활사 단계

  • Published : 2002.11.01
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Abstract

The first laboratory culture of host-parasite system of Prorocentrum minimum- Amoebophrya sp. was established by single cell isolation method. Here, we report the life cycle stages of the parasitic dinoflagellate. Amoebophrya sp. of the red tide dinoflagellate P. minimum as observed by light and epifluorescence microscopy. Infections developed inside the nucleus of P. minimum. The trophont developed to occupy almost all the intracellular space of the host at its late stage. The fully developed trophont finally ruptured through the host cell. “Vermiform stage”, the free-swimming extracellular lift cycle stage is followed by another stage for the sudden release of many individual dinospores. Our laboratory strain of the host-parasite system for P. minimum, a causative species fur the huge red tides in spring and summer in Korean coastal waters, could be a useful living material for the in situ biological control of harmful algal blooms.

한국 서해안의 곰소만에서 숙주-기생자 배양체 Prorocentrum minimum- Amoebophrya sp.를 분리하여 실험, 배양하는데 성공하였다. 본 연구는 이 숙주-기생체를 실험배양 하면서 광학 및 형광현미경 관찰을 토대로 규명된 적조생물 P minimum을 숙주로 하는 기생성 와편모류 Amoebophrya sp.의 생활사 단계를 보고한다. 이 기생성 와편모류에 의한 감염은 숙주 P minimum의 핵 내부에서 일어나고, 성장하여 결국은 세포질을 포함한 숙주 세포 공간의 대부분을 차지한다. 이 영양체의 세포 내의 성장이 완결되면 숙주의 각을 열고 세포 밖으로 나온다. 숙주 세포 밖의 자유유영 생활사 단계인 vermiform stage를 거쳐, 순간적으로 발산하여 수많은 dinospore를 형성하는 단계에 이른다. 우리나라 연안해역에서 춘·하계에 대규모 적조를 일으키는 원인 생물인 P. minimum과 이에 기생하는 본 Amoebophrya sp.의 숙주-기생배양체는 생물학적 적조제어기술 개발을 위한 중요한 생물재료의 하나이다.

Keywords

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