Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia
Toxigenic cyanobacteria and microcystins in the oligotrophic pelagic zone and mesotrophic bay of Lake Onego—the second largest lake in Europe—were found for the first time. Microscopic analysis revealed that <i>Dolichospermum lemmermannii, D. circinale</i> and <i>D. spiroides</i...
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2024-10-01
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| Series: | Toxins |
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| Online Access: | https://www.mdpi.com/2072-6651/16/11/457 |
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| author | Elena Tekanova Sergey Sidelev Nataliia Kalinkina Ekaterina Chernova Sophia Barinova Andrey Sharov Valeria Smirnova |
| author_facet | Elena Tekanova Sergey Sidelev Nataliia Kalinkina Ekaterina Chernova Sophia Barinova Andrey Sharov Valeria Smirnova |
| author_sort | Elena Tekanova |
| collection | DOAJ |
| description | Toxigenic cyanobacteria and microcystins in the oligotrophic pelagic zone and mesotrophic bay of Lake Onego—the second largest lake in Europe—were found for the first time. Microscopic analysis revealed that <i>Dolichospermum lemmermannii, D. circinale</i> and <i>D. spiroides</i> dominated in bloom spots in the oligotrophic zone of the lake and <i>D. flos-aquae</i> and <i>Microcystis aeruginosa</i> OKin the eutrophic bay. The abundance of cyanobacteria in bloom spots is potentially hazardous for humans and animals. PCR-analysis showed that <i>mcyA</i> gene involved in microcystin biosynthesis was found in cyanobacteria of the genera <i>Dolichospermum</i> and <i>Microcystis</i>. Five structural variants of intracellular microcystins were detected in a trace amount using high-performance liquid chromatography–mass-spectrometry of high resolution. The most hazardous hepatotoxin, MC-LR, was found only in the eutrophic bay. In the present study, the reasons for the low cyanotoxin content in the phytoplankton dominated by <i>Dolichospermum</i> are discussed. The findings of our study make a significant contribution to the accumulation of facts which state that toxigenic cyanobacterial blooms can occur in large oligotrophic lakes. |
| format | Article |
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| institution | OA Journals |
| issn | 2072-6651 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Toxins |
| spelling | doaj-art-6337da4be71e475c858aa370e8c1d0e62025-08-20T02:27:40ZengMDPI AGToxins2072-66512024-10-01161145710.3390/toxins16110457Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, RussiaElena Tekanova0Sergey Sidelev1Nataliia Kalinkina2Ekaterina Chernova3Sophia Barinova4Andrey Sharov5Valeria Smirnova6Karelian Research Center, Russian Academy of Sciences, 185030 Petrozavodsk, RussiaKarelian Research Center, Russian Academy of Sciences, 185030 Petrozavodsk, RussiaKarelian Research Center, Russian Academy of Sciences, 185030 Petrozavodsk, RussiaScientific Research Centre for Ecological Safety, St. Petersburg Federal Research Center, Russian Academy of Sciences, 197110 St. Petersburg, RussiaInstitute of Evolution, University of Haifa, Haifa 3498838, IsraelPapanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, 152742 Yaroslavl, RussiaKarelian Research Center, Russian Academy of Sciences, 185030 Petrozavodsk, RussiaToxigenic cyanobacteria and microcystins in the oligotrophic pelagic zone and mesotrophic bay of Lake Onego—the second largest lake in Europe—were found for the first time. Microscopic analysis revealed that <i>Dolichospermum lemmermannii, D. circinale</i> and <i>D. spiroides</i> dominated in bloom spots in the oligotrophic zone of the lake and <i>D. flos-aquae</i> and <i>Microcystis aeruginosa</i> OKin the eutrophic bay. The abundance of cyanobacteria in bloom spots is potentially hazardous for humans and animals. PCR-analysis showed that <i>mcyA</i> gene involved in microcystin biosynthesis was found in cyanobacteria of the genera <i>Dolichospermum</i> and <i>Microcystis</i>. Five structural variants of intracellular microcystins were detected in a trace amount using high-performance liquid chromatography–mass-spectrometry of high resolution. The most hazardous hepatotoxin, MC-LR, was found only in the eutrophic bay. In the present study, the reasons for the low cyanotoxin content in the phytoplankton dominated by <i>Dolichospermum</i> are discussed. The findings of our study make a significant contribution to the accumulation of facts which state that toxigenic cyanobacterial blooms can occur in large oligotrophic lakes.https://www.mdpi.com/2072-6651/16/11/457Lake Onegowater bloomcyanobacteriamicrocystinstoxigenic species |
| spellingShingle | Elena Tekanova Sergey Sidelev Nataliia Kalinkina Ekaterina Chernova Sophia Barinova Andrey Sharov Valeria Smirnova Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia Toxins Lake Onego water bloom cyanobacteria microcystins toxigenic species |
| title | Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia |
| title_full | Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia |
| title_fullStr | Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia |
| title_full_unstemmed | Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia |
| title_short | Toxigenic Cyanobacteria and Microcystins in a Large Northern Oligotrophic Lake Onego, Russia |
| title_sort | toxigenic cyanobacteria and microcystins in a large northern oligotrophic lake onego russia |
| topic | Lake Onego water bloom cyanobacteria microcystins toxigenic species |
| url | https://www.mdpi.com/2072-6651/16/11/457 |
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