Abstract
Organophosphorus and carbamate are widely used in agricultural production. Caenorhabditis elegans is a model organism that is widely used in various toxicology studies. To understand the effects of two types of commonly used pesticides, phoxim (organophosphorus) and carbaryl (carbamate), we determined the activities of acetylcholinesterases (AChEs) and detected the expression of four ace genes by RT-qPCR in C. elegans following treatment with these pesticides. The results showed that phoxim and carbaryl could reduce acetylcholinesterase activities and up-regulate the ace-3 mRNA expression levels. We also detected the toxic effects of these pesticides on the ace-3 deletion mutant dc-2, and found that some characteristics, including LC50, development, movement, reproduction and lifespan, were reduced in the dc-2 mutant. However, the toxic effects of carbaryl were weaker than those of phoxim. Carbaryl treatment did not significantly affect the LC50, movement ability or lifespan. Interestingly, body and brood size increased with carbaryl treatment at low concentrations. These data showed that both phoxim and carbaryl could inhibit AChE but that the ace-3 was necessary for phoxim detoxification.
Graphical Abstract
The LC50 of phoxim and carbaryl in wild type N2 and the ace-3 deletion mutant dc-2. **Higher significant differences (P < 0.01).
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (31320103921, 31172161) and the Outstanding Graduate Science Innovation Foundation of Shanxi Province (Grant No. 021852901008).
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The authors declare that they have no conflict of interest.
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Yan Han and Shaojuan Song have contributed equally to this work.
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Han, Y., Song, S., Guo, Y. et al. ace-3 plays an important role in phoxim resistance in Caenorhabditis elegans . Ecotoxicology 25, 835–844 (2016). https://doi.org/10.1007/s10646-016-1640-z
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DOI: https://doi.org/10.1007/s10646-016-1640-z