NDLI: Determination of the toxicity of the freshwater cyanobacterium Woronichinia naegeliana (Unger) Elenkin

Content Provider	Springer Nature Link
Author	Bober, Beata Bialczyk, Jan
Copyright Year	2017
Abstract	Cyanobacterial blooms are undesirable for ecological and health reasons. While Woronichinia naegeliana is a cyanobacterial species that appears frequently in freshwater, information about it is limited. An evaluation of its toxicity was conducted via tests based on the crustaceans Thamnocephalus platyurus and Daphnia pulex. The greatest effect of the aqueous extract obtained from W. naegeliana cells was observed for T. platyurus. The denoted semi-lethal concentration (LC$_{50}$) after 24 h of exposure was 0.99 mg of dry weight (d.w.) mL$^{−1}$. A lower toxicity was displayed for D. pulex, although it grew with time. Among the 18 fractions separated from cyanobacterial extract, only one containing the microginin FR3 (MG-FR3) displayed biological activeness against T. platyurus. The remaining products synthesized by W. naegeliana displayed an absence or a low level of toxicity making it impossible to determine the LC$_{50}$ value. Detailed research revealed that MG-FR3 did not affect the activity of enzymes such as trypsin, chymotrypsin, elastase and thrombin, which indicates another mode of action. The results demonstrated that blooms of W. naegeliana showed toxic activity towards invertebrate zooplankton.
Starting Page	1355
Ending Page	1362
Page Count	8
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	29
Issue Number	3
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-02-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioassays Cyanobacteria Cyanopeptides Microginins Plant Sciences Freshwater & Marine Ecology Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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