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Genotoxicity studies have revealed that pesticides bind to genetic material in non-target vertebrates, thereby impairing the genetic integrity of these animals. The main objective of this study was to determine the genotoxic damage in erythrocytes of two native South American amphibian Physalaemus cuvieri and Physalaemus gracilis, both species exposed to a glyphosate-based herbicide. We evaluated the presence of micronuclei (MN) and erythrocyte nuclear abnormalities (ENA) as biomarkers for potential genotoxic compounds. Tadpoles were exposed to doses permitted by Brazilian legislation and concentrations found naturally in Brazilian and Argentinian waters (500, 700 and 1000 μg/L). Glyphosate-based herbicide caused micronuclei formation and several types of erythrocyte nuclear abnormalities in both Physalaemus species. The total frequency of MN and ENA demonstrated the occurrence of cell damage at all tested concentrations. Glyphosate herbicide can be considered a genotoxic that may impact the genetic integrity of native populations of P. cuvieri and P. gracilis. Copyright © 2020 Elsevier B.V. All rights reserved.


Jéssica Samara Herek, Luana Vargas, Suélen Andressa Rinas Trindade, Camila Fatima Rutkoski, Natani Macagnan, Paulo Afonso Hartmann, Marilia Teresinha Hartmann. Genotoxic effects of glyphosate on Physalaemus tadpoles. Environmental toxicology and pharmacology. 2021 Jan;81:103516

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PMID: 33080355

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