Toxins of cyanobacteria (Cyanophyta)

Voloshko, L. N.; Plyushch, A. V.; Titova, N. N.

doi:10.1615/interjalgae.v10.i1.20

Cited by 8 publications

(3 citation statements)

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“…Массовое и быстрое развитие этих водорослей в водоеме, происходящее чаще всего при доминировании одного-двух видов, получило название «цветение» воды. Лавинообразное размножение цианобактерий при их лизисе (гибели) приводит к образованию значительного количества особо ядовитых токсинов [1].…”

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The First Investigatons of Cyanotoxins Presence in Waterbodies and Watercources of Belarus

Mikheyeva¹

2021

JBSUE

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The estimation of species composition, abundance and biomass of cyanobacteria in “bloom” as well as the search for toxic species has been undertaken for the first time in 20 water bodies and water courses of Belarus mainly used for public recreation. There were identified 50 representatives of cyanobacteria assigned to 18 genera, among them three species were marked for the first time for the Belarus: Snowella atomus Komárek et Hindák., Anabaenopsis arnoldii Aptekar, Anabaenopsis kelifii Kog. By combining molecular-biological and analytical methods and by using genetic markers when studying toxic «water blooms» the search of genes responsible for synthesis of hepatotoxic microcystin, nodularin, cylindrospermosin and neurotoxic saxitoxin was undertaken. It has been shown that in all the investigated lakes and rivers there were cyanobacterium relating to Anabaena and Microcystis genera that can synthesize highly toxic microcystins – LR, RR, YR. Saxitoxin synthesis genes and close to it variants of paralytic toxins such as goniatoksins 5, 6, dekarbamoilgoniatoksin 2, dekarbamoilsaksitoksin and neosaksitoksin were found in 7 waterbodies.

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Section: Introductionunclassified

The First Investigatons of Cyanotoxins Presence in Waterbodies and Watercources of Belarus

Mikheyeva¹

2021

JBSUE

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“…The negative consequences of this process are aggravated by the fact that in some cases the "bloom" is accompanied by the release of biologically active and toxic substances into the aquatic environment. These compounds are pyrogenic and toxic, they cause skin irritation and allergic reactions in both people and animals [1,2], and can also be fatal in the population. Toxins that are in the cells of cyanobacteria, after the destruction of these cells enter the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Using Basaltic Tuff for Decreasing the Growth Activity of Cyanobacteria

Cheban

Марченко

2020

ILNS

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The atricle is devoted to the study of the cultivation of cyanobacteria Microcystis aeruginosa (Kützing) Kützing, Microcystis pulverea (H.C.Wood) Forti. in the presence of basalt tuff. The possibility of using basalt tuff as an adsorbing material for regulating the number of cyanobacteria and preventing toxic “water bloom” in fluid circuits. The study analyzes the change in the biomass amount and the dynamics of the proportion of dead cyanobacteria in response to the presence of basalt tuff in the culture medium. It is noted that the use of basalt tuff leads to a decrease in the growth activity of cultures of Microcystis aeruginosa, Microcystis pulverea, manifested in an increase in the number of dead cells and slowdown the accumulation of cyanobacterial biomass. These effects are the result of a decrease in the amount of available nitrogen in the nutrient medium.

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“…Many ponds, lakes, and reservoirs are becoming hypereutrophic water bodies (from the Greek eutrophia, "good nutrition") by the concentrations of chlorophyll and phytoplank ton biomass and primary production. In such water bodies, cyanobacteria, or blue green algae, as they were called before, proliferate in an avalanche like manner and their lysis (death) produces many highly poisonous toxins [1]. This proliferation threatens the loss of many freshwater resources in Russia.…”

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Supramolecular regulators of water bloom

Rumyantsev¹,

Kryukov²

2012

Her. Russ. Acad. Sci.

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Climatic changes and anthropogenic environmen tal impacts in the first decade of the 21st century have induced long lasting blooms (changes in water color ing) in inland water bodies across Russia, which are associated with destruction of the biotic complex of water self purification and are hazardous to the health and economic activity of people. Many ponds, lakes, and reservoirs are becoming hypereutrophic water bodies (from the Greek eutrophia, "good nutrition") by the concentrations of chlorophyll and phytoplank ton biomass and primary production. In such water bodies, cyanobacteria, or blue green algae, as they were called before, proliferate in an avalanche like manner and their lysis (death) produces many highly poisonous toxins [1]. This proliferation threatens the loss of many freshwater resources in Russia.Thus, interest in the problem of water blooms remains urgent. The main abiotic (the content of bio genic elements, water transparency, illuminance, and depth) and algological (the chlorophyll concentra tion, phytoplankton counts and biomass, and the presence of cyanobacterial toxins) indicators of water bodies are analyzed on a regular basis [2]. Limnolo gists attach great importance to studies of cause-effect relationships in the emergence and development of toxic water blooms. In particular, it has been proven convincingly that the amino acid component of bot tom sediments plays a leading role in water blooming [3]. To identify toxigenic cyanobacteria, researchers started to apply the polymerase chain reaction (PCR) with primers for the genes responsible for the synthesis of toxins. Studies into vegetative cyanobacterial cells helped reveal their principal structural similarity with the cells of gram negative eubacteria and record the biggest gene [(1.6-8.6) × 10 9 Da] found in prokaryotes [4]. However, the overall picture has been lost amid individual achievements, and, as a result, an apparent deadlock is seen in the attempts to create effective means and methods for preventing negative conse quences of this natural phenomenon [5]. There is no doubt that at present we need to change the research paradigm in this field. It is not excluded that, if we consider the transition from nonliving matter to living matter as a unified process of transformations in supramolecular systems, we will manage to overcome the crisis in solving the problem of water blooms.Cyanobacteria are considered not only a transi tional link between microorganisms and plants; the study of their vital regularities interfaces the living and the nonliving. Cyanobacteria evolved, presumably, more than 3.5 billion years ago in an anaerobic envi ronment in conditions of aggressive ultraviolet radia tion and sharp temperature variances, surrounded by mineral matter. Therefore, bioinert systems had to be developed to support the vital activity of ancient cyanobacteria and other organisms and provide for the interaction of inorganic and organic substances. An important role in their formation was played by the quasi tetrahedral lattice o...

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Toxins of cyanobacteria (Cyanophyta)

Cited by 8 publications

References 0 publications

The First Investigatons of Cyanotoxins Presence in Waterbodies and Watercources of Belarus

The First Investigatons of Cyanotoxins Presence in Waterbodies and Watercources of Belarus

Using Basaltic Tuff for Decreasing the Growth Activity of Cyanobacteria

Supramolecular regulators of water bloom

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