CYANOBACTERIAL NEUROTOXINS AND THEIR PRODUCERS IN TEMPERATE LAKES IN LITHUANIA

Neurotoxic cyanobacterial blooms are a worldwide phenomenon, however, in European aquatic ecosystems neurotoxins are less frequently encountered than hepatotoxins. Among neurotoxins, saxitoxins (STXs) are detected more rarely than ANTX-a. In this study, the first report on the presence of STXs and A...

Full description

Saved in:
Bibliographic Details
Published inPhycologia (Oxford) Vol. 56; no. 4; p. 166
Main Authors Savadova, K, Karosienė, J, Toruñska-Sitarz, A, Koreivienė, J, Kasperovičienė, J, Vitonytė, I, Błaszczyk, A, Mazur-Marzec, H
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Ltd 01.08.2017
Subjects
Aquatic ecosystems
Blooms
Cyanobacteria
Ecosystems
Eutrophic lakes
Eutrophication
Hepatotoxicity
Lakes
Neurotoxicity
Neurotoxins
Oligopeptides
Peptides
Phycocyanin
Seasonal variations
Spacer
Toxins
Online AccessGet full text

Cover

More Information
Summary:Neurotoxic cyanobacterial blooms are a worldwide phenomenon, however, in European aquatic ecosystems neurotoxins are less frequently encountered than hepatotoxins. Among neurotoxins, saxitoxins (STXs) are detected more rarely than ANTX-a. In this study, the first report on the presence of STXs and ANTX-a in Lithuanian lakes is represented. The seasonal fluctuation in neurotoxins occurrence was determined in the environmental samples from three eutrophic lakes. In addition, the presence of the toxins, as well as different classes of peptides, was screened in 83 isolated strains of cyanobacteria Aphanizomenon gracile, A. flos-aquae, Cuspidothrix issatschenkoi, Sphaerospermopsis aphanizomenoides. STXs were detected in cyanobacterial samples collected from July to September. The tested A. gracile strains varied with respect to the produced oligopeptides and phycocyanin intergenic spacer (PC-IGS) sequences. In conclusion, the authors identified A. gracile as a producer of saxitoxins in Lithuanian lakes. However, analysis of the isolated strains of A. gracile with application of chemical and genetic methods showed that the populations are not clonal.
ISSN:0031-8884
2330-2968