• Journal of Microbiology and Biotechnology
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• 제11권3호
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• pp.515-523
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• 2001

The dinoflagellates have some primitive nuclear features and are evolutionarily intermediate between prokaryotes and eukaryotes. The small subunit ribosomal RAN gene, the 5.8S ribosomal RNA gene, and the internal transcribed spacer (ITS) of Gonyaulax polyedra were cloned, and their sequences were analyzed to better understand their evolutionary position. The small subunit ribosomal RNA gene was 1,794 nt long, the large subunit ribosomal RNA gene was approximately 3,500 nt long, and the 5.8S ribosomal RNA gene was 159 nt long. The first internal transcribed spacer (ITS1) was 191 nt long, and the second internal transcribed spacer (ITS2) was 185 nt long. The intergenic spacer of the ribosomal RNA gene (IGS) was about 2,200 nt long, indicating that 5,800 nt of transcribed sequences were separated by roughly 2,200 nt of intergenic spacer. The ribosomal RNA genes were repeated many times and arranged in a head-to-tail, tandemly repeated manner. The repeating unit of ribosomal RNA gene of G. polyedra was proposed to be 8,000 nt long. Based on the lengths of ribosomal RNA, sequence alignments with representative organisms, and phylogenetic analysis on ribosomal RNA, G. polyedra appears to be one of the alveolates branched from the eukaryotic crown and, among dinoflagellates, it seems to not have emerged early.

• Journal of the korean society of oceanography
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• 제31권3호
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• pp.144-149
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• 1996

I investigated the predation impact by the heterotrophic dinoflagellate Protoperidinium cf. divergens on copepod eggs in the presence of co-occurring phytoplankton prey (a preferred red-tide dinoflagellate Gonyaulax polyedra) and the selective feeding on mixtures of both prey. The ingestion rates of P. cf. divergens on Egg N (unidentified round copepod eggs with a smooth surface, about 80 in diameter) decreased by only 1.7-2 times when mean G. polyedra concentration increased by 57-115 times. In mixed prey experiments, P. cf. divergens preferred Egg N over G. polyedra even at 1.1 ${\mu}g$C $ml^{-1}$ or 470 cells $ml^{-1}$ of the latter. A strong preference of P. cf. divergens for Egg N over G. polyedra can be responsible for this relatively small effect. Protoperidinium may sometimes have a considerable predation impact on the populations of Egg N even during phytoplankton blooms or red-tide periods.

• 한국해양학회지
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• 제16권2호
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• pp.57-98
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• 1981

쌍편모조류는 해양생태계에서 규조류 다음으로 해양 식물플랑크톤의 중요한 구성요인이다. 따라서 쌍편모조류의 분류는 식물플랑크톤을 연구하는데 중요하고도 기본적인 연구과제이다. 우리나라에서 해산쌍편모조류에 관한 기록은 박(1956)이 한국해협에서와 하기 남해안에서의 플랑크톤조성을 연구한 결과 Ceratium속 및 Peridinium속의 몇몇 종이 처음으로 기록되었다. 그 이후에 유(1960)에 의해서 용호만에서 이매패인 불통의 식이 연구결과 Dinophysis sp.와 Prorocentrum sp.의 기록을 남겼으며 박 김(1967)에 의해 진해만에서 Gymnodinium sp.와 Noctiluca sp.가 기록되었는데 이때 기록된 Gymnodinium lumura가 Gymnodiniales로서는 지금까지 우리나라에서 기록된 유일한 것이다. 최(1967)는 한국연안수역에서 Pyrophacus sp.를 관찰하였고 김 조(1969)는 금강하구에서 Glenodinium foliaceum을 기록했다. 마지막으로 심 이(1979)에 의해서 천수만에서 Gonyaulax polygramma와 Gonyaulax Polyedra가 기록되었다.