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Cyanobacterial toxins in fresh and brackish waters of Pomorskie province (northern Poland)

100%

Mazur H. , Lewandowska J. , Blaszczyka A. , Kot A. , Plinski M.

Oceanological and Hydrobiological Studies

2003

nr 1

15-26

Hepatotoxic cyclic peptides and neurotoxic alkaloids are the most common groups of cyanobacterial toxins. They pose a serious threat to human and animal health; each year they are responsible for several cases of animal fatalities (mammals, fish and birds). In Polish water bodies toxic blooms of cyanobacteria are also frequently observed. In this work, a procedure for anatoxin-a analysis has been modified to obtain a sensitive and selective method for routine studies of bloom samples. The presence of cyanobacterial neuro and hepatotoxins in fresh and brackish waters of Pomorskie Province was examined. Hepatotoxins, microcystins or nodularin, were detected in all phytoplankton samples dominated by the cyanobacteria of Microcystis and Anabaena genera or by Nodularia spumigena. HPLC-PDA analysis showed the presence of anatoxin-a only in one sample collected in coastal waters of the Gulf of Gdansk and dominated by Anabaena.

Cyanobacteria ? the source of biologically active substances

100%

Glowacka J. , Waleron M. , Szefel-Markowska M. , Lojkowska E. , Waleron K.

2007

nr 4

95-112

Cyanobacteria (blue ? green algae) are one of the largest group of Gram ? negative, photosynthetic prokaryotes, which are morphologically diverse and highly widespread in salt and sweet water and also in terrestrial habitats. They play a significant role as primary producers in many ecosystems. Some species of Cyanobacteria are capable to grow extensively and formate toxic water blooms which can be dangerous for animal and human health. Certain species of them produce a wide variety of bioactive compounds which can have potential biotechnological cosmetical and pharmaceutical applications. Cyanobacteria have recently been identified as one of the most promising group of organisms from which large number of novel, biochemically active natural compounds can be isolated.