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Phytotoxicity and cytogenotoxicity of pesticide mixtures: analysis of the effects of environmentally relevant concentrations on the aquatic environment

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Abstract

In this study, we investigate the toxicity of commercial formulations based on glyphosate, 2,4-D, imidacloprid, and iprodione, in isolation and mixed, on Allium cepa. The mixtures consisted of combinations in the lowest (M1), intermediate (M2), and highest concentrations (M3) of each pesticide. We measured physiological (germination rate, germination speed, and radicular length) and cyto-genotoxic (mitotic index and frequency of aberrant cells) parameters. In addition, we analyzed the cell cycle progression and cell death induction by flow cytometry. When applied in isolation, the pesticides changed the parameters evaluated. M1 and M2 inhibited root length and increased the frequency of aberrant cells. Their genotoxic effect was equivalent to that of pesticides applied in isolation. Furthermore, M1 and M2 caused cell death and M2 changed the cell cycle progression. M3 had the greatest deleterious effect on A. cepa. This mixture inhibited root length and promoted an additive or synergistic effect on the mitotic index. In addition, M3 changed all parameters analyzed by flow cytometry. This research clearly demonstrates that the pesticides tested, and their mixtures, may pose a risk to non-target organisms.

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The data that support the funding of this study are available from the corresponding author, upon reasonable request.

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Funding

This work was supported by the Fundação de Amparo à Pesquisa do Espírito Santo — FAPES (No. 14/2019-PROCAP 2020). Luanna Alves Miranda has received from FAPES Master fellowship 096/2020.

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Conceptualization was performed by Tatiana da Silva Souza and Victor Ventura de Souza. Material preparation, data collection, and analysis were performed by Luanna Alves Miranda, Renata Alice Campos, and José Marcello Salabert de Campos. The first draft of the manuscript was written by Luanna Alves Miranda. Writing — review and editing: Tatiana da Silva Souza. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. Supervision: Tatiana da Silva Souza.

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Correspondence to Tatiana da Silva Souza.

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Miranda, L.A., de Souza, V.V., Campos, R.A. et al. Phytotoxicity and cytogenotoxicity of pesticide mixtures: analysis of the effects of environmentally relevant concentrations on the aquatic environment. Environ Sci Pollut Res 30, 112117–112131 (2023). https://doi.org/10.1007/s11356-023-30100-y

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  • DOI: https://doi.org/10.1007/s11356-023-30100-y

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