Isolated and combined effects of cobalt and nickel on the microalga Raphidocelis subcapitata.

Autor: Dos Reis LL; Universidade Federal de São Carlos - UFSCar, Department of Hydrobiology, Rodovia Washington Luís, Km 235, Zip Code 13565-905, São Carlos, SP, Brazil. larissa_scp@hotmail.com.; Post-Graduate Program in Ecology and Natural Resources (PPGERN), Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, Zip Code 13565-905, São Carlos, SP, Brazil. larissa_scp@hotmail.com., de Abreu CB; Center for the Development of Functional Materials (CDMF), Federal University of São Carlos (UFSCar), 13565-905, São Carlos, SP, Brazil., Gebara RC; Center for the Development of Functional Materials (CDMF), Federal University of São Carlos (UFSCar), 13565-905, São Carlos, SP, Brazil., Rocha GS; Universitat Rovira i Virgili, Escola Tècnica Superior d'Enginyeria Química, Departament d'Enginyeria Química, Avinguda Països Catalans, 26, 43007, Tarragona, Spain., Longo E; Center for the Development of Functional Materials (CDMF), Federal University of São Carlos (UFSCar), 13565-905, São Carlos, SP, Brazil., Mansano ADS; Universidade Federal de São Carlos - UFSCar, Department of Hydrobiology, Rodovia Washington Luís, Km 235, Zip Code 13565-905, São Carlos, SP, Brazil.; Post-Graduate Program in Ecology and Natural Resources (PPGERN), Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, Zip Code 13565-905, São Carlos, SP, Brazil., Melão MDGG; Universidade Federal de São Carlos - UFSCar, Department of Hydrobiology, Rodovia Washington Luís, Km 235, Zip Code 13565-905, São Carlos, SP, Brazil.; Post-Graduate Program in Ecology and Natural Resources (PPGERN), Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, Zip Code 13565-905, São Carlos, SP, Brazil.
Jazyk: angličtina
Zdroj: Ecotoxicology (London, England) [Ecotoxicology] 2024 Jan; Vol. 33 (1), pp. 104-118. Date of Electronic Publication: 2024 Jan 18.
DOI: 10.1007/s10646-024-02728-0
Abstrakt: Aquatic organisms are exposed to several compounds that occur in mixtures in the environment. Thus, it is important to investigate their impacts on organisms because these combined effects can be potentiated. Cobalt (Co) and nickel (Ni) are metals that occur in the environment and are used in human activities. To the best of our knowledge, there are no studies that investigated the combined effects of these metals on a freshwater Chlorophyceae. Therefore, this study analyzed the isolated and combined effects of Co and Ni in cell density, physiological and morphological parameters, reactive oxygen species (ROS), carbohydrates and photosynthetic parameters of the microalga Raphidocelis subcapitata. Data showed that Co affected the cell density from 0.25 mg Co L -1 ; the fluorescence of chlorophyll a (Chl a) (0.10 mg Co L -1 ); ROS production (0.50 mg Co L -1 ), total carbohydrates and efficiency of the oxygen evolving complex (OEC) at all tested concentrations; and the maximum quantum yield (Φ M ) from 0.50 mg Co L -1 . Ni exposure decreased ROS and cell density (0.35 mg Ni L -1 ); altered Chl a fluorescence and carbohydrates at all tested concentrations; and did not alter photosynthetic parameters. Regarding the Co-Ni mixtures, our data best fitted the concentration addition (CA) model and dose-ratio dependent (DR) deviation in which synergism was observed at low doses of Co and high doses of Ni and antagonism occurred at high doses of Co and low doses of Ni. The combined metals affected ROS production, carbohydrates, Φ M , OEC and morphological and physiological parameters.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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