• Title/Summary/Keyword: Cochlodinium polykrioides

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The Influences of Extracts from Ceratium spp, on the Growth of Harmful Microalgae (유해성 적조생물에 대한 Ceratium 추출물 영향 평가)

  • Cho, Eun-Seob
    • Journal of Life Science
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    • v.14 no.4
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    • pp.589-592
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    • 2004
  • The growth response of the fish-killing dinoflagellate Cochlodinium polykrikoides was studied in cultures, using the treatment of Ceratium extracts by a methanol, a water-soluble, and a cell-free medium. The cell-free medium had the most increasing on the growth of C. polykrikoides cultures, enriched with $\geq$ 25% Ceratium, whereas the methanol and water-souble fractions did not affect the growth of C. polykrikoides exposed to even higher concentration. In particular, the cell-free medium also increased the growth of Gyrodinium impudicum and Chaetoceros sp., similar species to C. polykrikoides. In contrast to C. polykrikoides, G. impudicum and Chaetoceros sp., the growth of Alexandrium tamarense was inhibited significantly, and there was no great effect on the growth of Prorocentrum minimum. These results imply that Ceratium extracts may play an important role in the stimulatory effect of C. polykrikoides, and they have to affect the interaction between C. polykrikoides and Ceratium when co-existing.