Can Salvinia auriculata bioremediate the toxic effects of Fipronil 800wg on the tadpoles of Dendropsophus minutus?

• Published in: Aquatic toxicology 2024-06, Vol.271, p.106926-106926, Article 106926
• Main Authors: Sotero, Daiany Folador, de Freitas, Renata Maria Pereira, Virote, Ana Julia Pereira Peixoto, Benvindo-Souza, Marcelino, Tavares, Guilherme Rogie Gonçalves, Bastos, Rogério Pereira, Carvalho, Priscilla, de Melo e Silva, Daniela
• Format: Article
• Language: English
• Subjects: Animals; Anura - physiology; Biodegradation, Environmental; Genotoxicity; Insecticide; Insecticides - toxicity; Larva - drug effects; Mutagenicity; Oxidative stress; Phytoremediation; Pyrazoles - toxicity; Water Pollutants, Chemical - toxicity
• ISSN: 0166-445X; 1879-1514
• DOI: 10.1016/j.aquatox.2024.106926

•Fipronil 800 WG at 1.5 mg/L causes the death of 33.3 % of tadpoles within 96 h.•Salvinia auriculata phytoremediates DNA damage in tadpoles exposed to fipronil.•Lower frequencies of nuclear alterations in D. minutus with Salvinia auriculata. Worldwide, the indiscriminate and escalating application of pesticides has led to extensive impacts on both the environment and non-target organisms. Phytoremediation, which employs plants to decontaminate environments, is a potential strategy for the mitigation of this damage. The present study assessed the phytoremedial potential of Salvinia auriculata, an aquatic macrophyte known to be effective for the removal of environmental contaminants. In the laboratory, Dendropsophus minutus tadpoles were exposed to different concentrations (0.035, 0.1, 1.0, and 1.5 mg/l) of the commercial insecticide Fipronil 800wg in two treatments – (i) simple exposure for 96 h, and (ii) exposure for 168 h in aquariums containing S. auriculata. In the first experiment, a mortality rate of 33.3 % was recorded at the highest Fipronil concentration (1.5 mg/l), and genotoxic parameters increased at all concentrations except 0.035 mg/L, in comparison with the control. In the second experiment, phytoremediation occurred at all the concentrations tested, with lower frequencies of cells with micronuclei, and binucleated, anucleated, and pyknotic nuclei being observed, in comparison with the first experiment. These findings highlight the potential effectiveness of S. auriculata for the phytoremediation of environments contaminated by pesticides and contribute to the understanding of the benefits of this approach for the protection and preservation of aquatic biodiversity. [Display omitted]