JOURNAL OF PLANKTON RESEARCH | VOLUME 8 | NUMBER 5 | PAGES 985-994 | 1986
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Production of extracellular carbohydrate in cultures of Ankistrodesmus densus Kors. (Chlorophyceae)
Federal University of Sao Carlos, Biological Sciences Department Via Washington Luiz, Km 235, 13560 Sao Carlos SF, Brazil 1Institute of Marine Biochemistry, University of Trondheim N-7034 Trondheim - nth, Norway
Received on October 1, 1985; accepted on May 1, 1986 An extracellular polysacchande, released into the culture medium by Ankistrodesmus densus is shown to be a product of active photosynthesis rather than diagenesis. Although produced in the exponential phase, its accumulation is most pronounced in the stationary phase under conditions of nitrogen depletion. It is a glycan, containing residues of galactose, mannose, glucose, xylose, arabinose and a trace of rhamnose.
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