Abstract
The occurrence of cyanobacteria in freshwaters attracts much attention due to its associated health threats and ecological implications. Yet data on the composition of cyanobacteria taxa and toxigenicity in some regions is still scarce. Here, we explored the occurrence of cyanobacteria and cyanotoxins in three locations in Ukraine (reservoir for Kasperivtsi Hydrothermal Power Plant and outflowing River Seret, and cooling pond of Khmelnytsky Atomic Power Plant) in summer 2017. Cyanobacteria were a dominant fraction at all stations. A number of potent-toxin producers were identified including Cylindrospermopsis raciborskii, Aphanizomenon gracile, Dolichospermum flos-aquae, and Planktothrix agardhii. Screening for the presence of dissolved and particulate content of microcystins (-LR, -YR, and -RR), cylindrospermopsin, and anatoxin-a yielded negative results. The studied waters displayed no toxicity in human platelets in vitro. Further toxicological and ecological studies are necessary to evaluate the potential presence of cyanotoxin producers in Ukraine.
Highlights
Cyanobacteria from the Chroococcales, Nostocales, and Oscillatoriales orders are subject to ongoing interest due to Responsible editor: Vitor Manuel Oliveira VasconcelosParticular attention is being paid to species that are recognized as potent producers of cyclic hepatopeptides microcystins (MCs) that include Microcystis aeruginosa (Kütz.) Kützing, Planktothrix agardhii (Gomont) Anagnostidis & Komárek, and members of Nostoc, Anabaena/Dolichospermum, and Anabaenopsis (Bernard et al 2017), as well as potent producers of the neurotoxicanatoxin-a (ANA-A) alkaloid that encompass species belonging to the Anabaena, Aphanizomenon, and Dolichospermum genera
We report the occurrence of C. raciborskii and other cyanobacteria belonging to the Chroococcales, Nostocales, and Oscillatoriales orders in three locations in Ukraine along with analyses of cyanotoxins (CYN, MCs, and ANA-A), physicochemical parameters, and in vitro toxicity of water
Water samples in volume from 200 to 500 mL were filtered through GF/C filters (Whatman, UK) to separate cyanobacterial cells from water and to determine dissolved and particulate concentration of cyanotoxins (microcystins (MCs), anatoxin-a (ATX), and cylindrospermopsin (CYN)) using the HPLC-DAD method
Summary
Cyanobacteria from the Chroococcales, Nostocales, and Oscillatoriales orders are subject to ongoing interest due to Responsible editor: Vitor Manuel Oliveira VasconcelosParticular attention is being paid to species that are recognized as potent producers of cyclic hepatopeptides microcystins (MCs) that include Microcystis aeruginosa (Kütz.) Kützing, Planktothrix agardhii (Gomont) Anagnostidis & Komárek, and members of Nostoc, Anabaena/Dolichospermum, and Anabaenopsis (Bernard et al 2017), as well as potent producers of the neurotoxic (homo)anatoxin-a (ANA-A) alkaloid that encompass species belonging to the Anabaena, Aphanizomenon, and Dolichospermum genera. We report the occurrence of C. raciborskii and other cyanobacteria belonging to the Chroococcales, Nostocales, and Oscillatoriales orders in three locations in Ukraine (water reservoir for Kasperivtsi Hydrothermal Power Plant and outflowing River Seret and cooling pond of Khmelnytsky Atomic Power Plant) along with analyses of cyanotoxins (CYN, MCs, and ANA-A), physicochemical parameters, and in vitro toxicity of water.
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