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JPR Advance Access originally published online on April 30, 2004
Journal of Plankton Research 2004 26(8):967-971; doi:10.1093/plankt/fbh085
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Journal of Plankton Research Vol. 26 No. 8 © Oxford University Press 2004; all rights reserved

SHORT COMMUNICATION

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

Daekyung Kim, Osamu Kumamoto1, Kyoung-Seon Lee1, Aiko Kuroda2, Akihiko Fujii3, Atsushi Ishimatus1 and Tatsuya Oda2,*

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

* Corresponding Author: t-oda{at}net.nagasaki-u.ac.jp

Received December 29, 2003; accepted in principle April 8, 2004; accepted for publication April 15, 2004; published online April 30, 2004

In laboratory exposure experiments, Chattonella marina showed a 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 factors responsible for the harmful effect of C. marina on shellfish.


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