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JOURNAL OF PLANKTON RESEARCH | VOLUME 18 | NUMBER 2 | PAGES 295-301 | 1996
© Oxford University Press
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Nitrogenous nutrition of the potentially toxic diatom Pseudonitzschia pungens f. multiseries Hasle
Institut für Chemie und Biologie des Meeres, Carl-von-Ossietzky-Universität Oldenburg Postfach 2503, D-26111 Oldenburg 1Institut für Meereskunde, Christian-Albrechts-Universität Kiel Düsternbrooker Weg, Kiel, FRG
Received on June 15, 1995; accepted on October 23, 1995 The potentially toxic diatom Pseudonitzschia pungens f. multiseries was grown on different sources of nitrogen in batch cultures. Ammonium did not support growth at concentrations >200 µM, and even lowered the growth rate, when it was supplied in addition to growth-saturating nitrate concentrations. This seemed to be a combined effect of inhibition of nitrate uptake and direct ammonia toxicity. Urea, glutamine and nitrite were used readily by P.pungens.
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