| Full text | |
| Author(s): |
dos Reis, Larissa Luiza
;
de Abreu, Cinthia Bruno
;
Gebara, Renan Castelhano
;
Rocha, Giseli Swerts
;
Longo, Elson
;
Mansano, Adrislaine da Silva
;
Melao, Maria da Graca Gama
Total Authors: 7
|
| Document type: | Journal article |
| Source: | ECOTOXICOLOGY; v. 33, n. 1, p. 15-pg., 2024-01-18. |
| Abstract | |
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 (phi(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, phi(M), OEC and morphological and physiological parameters. (AU) | |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 18/07988-5 - Bioprospecting, characterization and optimization of Brazilian microalgal strains for CO2 biofixation and bioproducts of commercial importance |
| Grantee: | Ana Teresa Lombardi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 21/13583-0 - Ecotoxicological Effects of Nanoparticles of ZnWO4 and CuWO4 On a Freshwater Planktonic Foodchain: Evaluating Possible Environmental Impacts of Emerging Contaminants |
| Grantee: | Renan Castelhano Gebara |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 21/13607-7 - Environmental impacts of CoWO4 and NiWO4 nanoparticles on trophic levels of an aquatic food chain |
| Grantee: | Cínthia Bruno de Abreu |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |