Food quality of detritus derived from the filamentous cyanobacterium Oscillatoria limneticafor Daphnia galeata
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چکیده
منابع مشابه
Role of microcystins in poisoning and food ingestion inhibition of Daphnia galeata caused by the cyanobacterium Microcystis aeruginosa.
The effects of microcystins on Daphnia galeata, a typical filter-feeding grazer in eutrophic lakes, were investigated. To do this, the microcystin-producing wild-type strain Microcystis aeruginosa PCC7806 was compared with a mcy- PCC7806 mutant, which could not synthesize any variant of microcystin due to mutation of a microcystin synthetase gene. The wild-type strain was found to be poisonous ...
متن کاملA Study on the Life Time of the S3-State in the Filamentous Cyanobacterium Oscillatoria chalybea
G. H. Schmid, K. P. Bader, and R. Schulder Universität Bielefeld, Fakultät für Biologie, Lehrstuhl Zellphysiologie Postfach 100131, D-33501 Bielefeld, Bundesrepublik Deutschland Z. Naturforsch. 49c, 108-114 (1994); received July 26/October 11,1993 Filamentous Cyanobacterium, S-State, Metastable S3-State, Kok Model In the filamentous cyanobacterium Oscillatoria chalybea deactivation of the S-sta...
متن کاملFurther Studies on the Induction of Nitrate Reductase by Arginine in the Filamentous Cyanobacterium Oscillatoria chalybea
In an earlier publication we reported on the role o f arginine for the development o f nitrate reductase activity in cells o f the filamentous cyanobacterium Oscillatoria chalybea (Bednarz and Schmid, Z. Naturforsch. 46c, 591 (1991)). In the present paper we present further evidence that arginine is the natural inducer for nitrate reductase activity. Thus, we show that the induc tion is regula...
متن کاملInduction of Nitrate Reductase Activity by Arginine in the Filamentous Cyanobacterium Oscillatoria chalybea
In Oscillatoria chalybea, as in other cyanobacteria, nitrate reduction depends directly on photosynthetic activity. Hence, nitrate reduction occurs only in the light and appears inhibited when photosynthesis is inhibited by the herbicide DCM U. Growth o f Oscillatoria cells is pos sible on a variety o f exogenous nitrogen sources in the medium and appears largely independ ent on the type of n...
متن کاملInterrelationship of Oxygen and Nitrogen Metabolism in the Filamentous Cyanobacterium Oscillatoria chalybea
Filamentous Cyanobacteria. Hydrogen Peroxide, Photosystem II. Nitrogen Metabolism By means of mass spectrometric analysis we have been able to demonstrate H20 2-production and its decomposition by photosystem II in thylakoids of the filamentous cyanobacterium Oscil latoria chalybea. This H 2Ö 2-production and its quasi simultaneous decomposition by the S-state system can be readily demonstrate...
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ژورنال
عنوان ژورنال: Journal of Plankton Research
سال: 1998
ISSN: 0142-7873,1464-3774
DOI: 10.1093/plankt/20.11.2199