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JPR Advance Access published online on April 30, 2004
Journal of Plankton Research, doi:10.1093/plankt/fbh085
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Received December 29, 2003
Accepted April 15, 2004

Article

Deleterious effect of Chattonella marina on short-necked clam (Ruditapes philippinarum); possible involvement of reactive oxygen species

Daekyung Kim 1, Osamu Kumamoto 2, Kyoung-Seon Lee 2, Aiko Kuroda 3, Akihiko Fujii 4, Atsushi Ishimatus 2, Tatsuya Oda 3*

1 Japan Society for Promotion of Science (Jsps), Water & Soil Environment Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
2 Marine Research Institute, Nagasaki University, Taira, Nagasaki 851-2213, Japan
3 Division of Biochemistry, Faculty of Fisheries, Nagasaki University, Bunkyo-Machi, Nagasaki 852-8521, Japan
4 Nagasaki Prefectural Institute of Fisheries, Taira, Nagasaki, 851-2213, Japan

* To whom correspondence should be addressed. E-mail: t-oda{at}net.nagasaki-u.ac.jp.


  Abstract

In laboratory exposure experiments, Chattonella marina showed the deleterious effect on short-necked clams (Ruditapes philippinarum). Accumulated C. marina cells were observed in gill tissues of the clams exposed to C. marina. Immunohistochemical analysis using antiserum against the crude glycocalyx of C. marina suggested that the glycocalyx was present on the gill surface. Mucus substances prepared from gill tissue of the clams stimulated C. marina to generate increased amounts of O2- in a concentration dependent manner. These results suggest that reactive oxygen species (ROS)-mediated gill tissue damage is one of the causative factor responsible for the harmful effect of C. marina on shellfish.


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