Life cycle of the ichthyotoxic dinoflagellate Cochlodinium polykrikoides in Korean coastal waters = 한국 연안수역에서 어독성의 와편모조류 Cochlodinium polykrikoides의 생활사

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Title
Life cycle of the ichthyotoxic dinoflagellate Cochlodinium polykrikoides in Korean coastal waters = 한국 연안수역에서 어독성의 와편모조류 Cochlodinium polykrikoides의 생활사
Author(s)
Choong-Jae Kim; H G Kim; C H Kim; Hee-Mock Oh
Bibliographic Citation
Harmful Algae, vol. 6, no. 1, pp. 104-111
Publication Year
2007
Abstract
Since 1995, blooms of the harmful dinoflagellate, Cochlodinium polykrikoides, have caused considerable mortality of aquatic organisms and economic loss in Korea. However, little is known about the life cycle of the species, except for the planktonic vegetative stage; therefore, the aim of this paper was to elucidate the life cycle of C. polykrikoides. Its life cycle has two morphologically different stages: an armored and an unarmored vegetative stage. Armored vegetative cells were found in seawater samples collected in late-November and developed into four-cell chained, unarmored vegetative cells under laboratory culture. In samples collected in late-May, both the armored and unarmored types (vegetative swimming stage) occurred; the former easily developed into an unarmored vegetative cell type, suggesting that the armoured-unarmored transition occurs as early as May. A presumptive resting cyst, round but folded at one side, was produced from armored type cells in laboratory conditions. It was also collected from natural bottom sediments, which suggests it is the dormant resting cyst of C. polykrikoides.
Keyword
Armored typeCochlodinium polykrikoidesResting cystUnarmored type
ISSN
1568-9883
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.hal.2006.07.004
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Cell Factory Research Center > 1. Journal Articles
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