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In vitro genotoxicity assessment of the synthetic plant growth regulator, 1-naphthaleneacetamide

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Abstract

1-Naphthaleneacetamide (NAAm) is a synthetic plant growth regulator in the auxin family that is widely used in agriculture to promote the growth of numerous fruits, for root cuttings and as a fruit thinning agent. The potential genotoxic effects of NAAm were investigated in vitro by the chromosome aberrations (CAs), and cytokinesis-block micronucleus assays in human peripheral blood lymphocytes (PBLs) for the first time. The human PBLs were treated with 20, 40, 80, and 160 µg/mL of NAAm for 24 and 48 h. The results of this study showed that NAAm significantly induced the formation of structural CA and MN for all concentrations (20, 40, 80 and 160 µg/mL) and treatment periods (24 and 48 h) when compared with the negative and the solvent control. In addition, the higher concentrations of NAAm (80 and 160 µg/mL) caused a statistically significant increase in nuclear bud (NBUD) formation for both 24 and 48 h treatment times. With regard to the cell cycle kinetics, at all the tested concentrations, NAAm caused a statistically significant reduction in the mitotic index (MI) only for 48 h treatment period and also in the nuclear division index (NDI) for both 24 and 48 h treatment periods as compared to the control groups. The reductions in the MI and NDI occured in a concentration-dependent manner for both treatment times. In conclusion, the present results indicate that in the tested experimental conditions, NAAm was genotoxic and cytotoxic on human PBLs in vitro.

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Acknowledgments

This study was funded by Mustafa Kemal University Research Fund (project code: 281).

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The authors declare that there is no conflict of interest.

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Authors and Affiliations

  1. Department of Biology, Faculty of Science and Letters, Mustafa Kemal University, 31000, Hatay, Turkey

    Ayşe Yavuz Kocaman

  2. Department of Biology, Basic and Applied Sciences Institute, Mustafa Kemal University, 31000, Hatay, Turkey

    Banu Güven

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  1. Ayşe Yavuz Kocaman
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  2. Banu Güven
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Correspondence to Ayşe Yavuz Kocaman.

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Kocaman, A.Y., Güven, B. In vitro genotoxicity assessment of the synthetic plant growth regulator, 1-naphthaleneacetamide. Cytotechnology 68, 947–956 (2016). https://doi.org/10.1007/s10616-015-9847-z

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