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Algae > Volume 9(2); 1994 > Article
Algae 1994;9(2): 125-134.
Neurotoxin-Producing Diatom, Pseudonitzschia pungens Grunow f. multiseries Hasle, off the Coastal Waters of Southern Korea. I. Morphological Features
Jin Hwan Lee
Department of Biology, Sangmyung Women's University
The present study is to morphologically compare a neurotoxin-producing diatom, Pseudonitzschia pungens f. multiseries with its closely related taxon, P. pungens f. pungens, collected from the coastal waters of southern Korea during the period from December 1974 to June 1994. Cell standing crops of the two taxa, P. pungens f. multiseries and P. pungens f. pungens, ranged from a minimum of 96,998 cells/l to a maximum of 2,243,159 cells/l. From the cell shape, length, width, number of costae and fibulae and rows of pores in a stria etc. point of view, P. pungens f. multiseries shows similarities between Korean specimens and those of other countries. The main distinguishing character is the number of poroids; that is, 3-6 rows in P. pungens f. multiseries and 2 rows in P. pungens f. pungens between costae. Toxin producing P. pungens f. multiseries were found in April 1983 and 1993 in Jinhae Bay, and in February 1986 between Nokdong and Deukryangdo Island.
Key words: toxic diatom, Pseudonitzschia, abundance, morphology

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