Assessment of the Toxicity of the Natural and Technogenic Environment for Motor Activity of Daphnia magna

Olkova, Anna Sergeewna; Zimonina, Natalia

doi:10.12911/22998993/125459

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…The mortality of individuals was found by complete immobilization (Federal Register 1.39.2007.03222, 2007). The motor activity of each individual was determined by using the direct visual method (Olkova and Zimonina, 2020). The bottom of a glass chemical beaker with a diameter of 3 cm, placed on a palette with cells 0.5х0.5 cm, was used as a field of view.…”

Section: Magna Bioassaysmentioning

confidence: 99%

Behavioral and Lethal Effects of La Salt and a Mixture of Cu and La Salt on <i>Daphnia magna</i> Straus

Olkova¹,

Sysolyatina²

2022

J. Ecol. Eng.

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The study of joint effects of REE and HM is relevant, since they are often satellite deposits, their areas of application are similar, and an increase in concentrations of elements of these groups in the areas that are not places of their extraction and enrichment is proven. The purpose of this work was to find out the pre-lethal and lethal effects of La, Cu and their equimolar mixtures in tests for Daphnia magna Straus. Bioassays of artificially polluted natural waters, initially free of toxic elements, was carried out. In bioassays on the mortality of D. magna in the space of 96 hours it was found that acute toxicity of copper sulfate solutions is observed at the calculated concentration of Cu 2+ 0.1 mg/L (0.0016 mmol/L), and the acute toxicity of lanthanum sulfate is when the dose of La 3+ is equal to 50 mg/L (0.36 mmol/L). In the solutions comprising mixtures of Cu and La salts (1:1 calculated using metals), the concentrations of which are equimolar to the investigated solutions of copper sulfate, the mortality of D. magna begins in the solution containing 10 times less toxic elements. It was found that 25% of individuals died in the variant "0.00016 mmol/L", the mortality of 100% of individuals was at the total metal concentration of 0.0008 mmol/L. The solutions containing La (0.072-0.72 mmol/L) and Cu (0.00016-0.0016 mmol/L) naturally inhibit the motor activity of D. magna by 1.3-5.3 times and 1.2-1.9 times in 1 hour and 1.7-2.8 and 1.4-2.2 times in 24 hours, respectively. The solutions containing mixtures of Cu and La salts inhibited the motor activity of D. magna in the same way as copper sulfate solutions with the Cu 2+ concentrations equimolar "Cu 2+ + La 3+ ". Therefore, when testing the solutions with the same molar concentrations of Cu 2+ and the mixture of "Cu 2+ + La 3+ " it was shown that La potentiates the pre-lethal effect of Cu to the level of individual effects of Cu. The additions of La salt to the solutions containing pre-lethal doses of Cu lead to lethal effects of such mixtures for D. magna.

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Section: Magna Bioassaysmentioning

confidence: 99%

Behavioral and Lethal Effects of La Salt and a Mixture of Cu and La Salt on <i>Daphnia magna</i> Straus

Olkova¹,

Sysolyatina²

2022

J. Ecol. Eng.

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“…and animals (unicellular, crustaceans, worms, etc.). Bioassays involving aquatic organisms, such as Daphnia magna, are common and widely used to study the toxicity of various chemicals [28,29]. Biological tests on a biomodel of D. magna are standardized in many countries [30].…”

Section: Introductionmentioning

confidence: 99%

“…Biological tests on a biomodel of D. magna are standardized in many countries [30]. Short-term testing allows determining the acute toxic effect of compounds in aqueous solution on the survival rate of the branched crustacean D. magna, which is one of the most sensitive biomarkers for determining the toxicity caused by different classes of chemical compounds [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Polyacrylamide Hydrogel Enriched with Amber for In Vitro Plant Rooting

Kernosenko

Samchenko

Goncharuk

et al. 2023

Plants

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In this work, a new material for in vitro plant rooting based on highly dispersed polyacrylamide hydrogel (PAAG) enriched with amber powder was synthesized and investigated. PAAG was synthesized by homophase radical polymerization with ground amber addition. Fourier transform infrared spectroscopy (FTIR) and rheological studies were used to characterize the materials. They showed that the synthesized hydrogels have physicochemical and rheological parameters similar to those of the standard agar media. The acute toxicity of PAAG-amber was estimated based on the influence of washing water on the viability of plant seeds (pea and chickpea) and Daphnia magna. It proved its biosafety after four washes. The impact on plant rooting was studied using the propagation of Cannabis sativa on synthesized PAAG-amber and compared with agar. The developed substrate stimulated the rooting of the plants to more than 98% in comparison to standard agar medium (95%). Additionally, the use of PAAG-amber hydrogel markedly enhanced metric indicators of seedlings: root length increased by 28%, stem length—by 26.7%, root weight—by 167%, stem weight—by 67%, root and stem length—by 27%, root and stem weight—by 50%. This means that the developed hydrogel significantly accelerates reproduction and allows obtaining a larger amount of plant material within a shorter period of time than the standard agar substrate.

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Potentization of the Toxic Effect of Copper in the Presence of Lanthanum in Bioassays for Daphnia magna Straus (Cladocera, Crustacea)

Sysolyatina,

Olkova

2023

Biol Bull Russ Acad Sci

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Assessment of the Toxicity of the Natural and Technogenic Environment for Motor Activity of Daphnia magna

Cited by 5 publications

References 17 publications

Behavioral and Lethal Effects of La Salt and a Mixture of Cu and La Salt on <i>Daphnia magna</i> Straus

Behavioral and Lethal Effects of La Salt and a Mixture of Cu and La Salt on <i>Daphnia magna</i> Straus

Polyacrylamide Hydrogel Enriched with Amber for In Vitro Plant Rooting

Potentization of the Toxic Effect of Copper in the Presence of Lanthanum in Bioassays for Daphnia magna Straus (Cladocera, Crustacea)

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