Abstract
Background:
Many genotoxicity tests allow us to understand the mechanism of damages on genetic material occurring in living organisms against various physical and chemical agents. One of them is the Comet test. The current study aimed to evaluate genotoxic caused by picloram and dicamba to root meristems of Allium cepa utilizing comet assay.
Methods:
Two different protocols were used for rooting and auxin/pesticide application. (i) A. cepa bulbs were rooted in MS medium and then treated with Murashige and Skoog (MS) medium (control) and 0.67, 1.34, 2.01, 2.68, 3.35, 4.02, and 8.04 mg/L of picloram and dicamba using aseptic tissue culture techniques. (ii) A. cepa bulbs were then rooted in bidistilled water and treated with 0 (control), 0.67, 1.34, 2.01, 2.68, 3.35, 4.02, and 8.04 mg/L of picloram and dicamba in distilled water. The A. cepa root tip cells in both treatment groups were examined using comet test to find the possible DNA damaging effects of picloram and dicamba.
Results
The results obtained at all the concentrations were statistically compared with their control groups. Almost at all the concentrations of Picloram and dicamba increased comet tail intensity (%) and tail moment in roots treated in MS medium. Two highest concentrations revealed toxic effect. On the other hand, DNA damaging effect of both auxins was only noted on the highest (> 4.02 mg/L) in roots treated in distilled water.
Conclusions
This study approve and confirm genotoxic effects of how growth regulators on plants. These findings give an evidence of DNA damage in A. cepa. Therefore, both picloram and dicamba should only be used in appropriate and recommended concentrations in agriculture to conserve ecosystem and to pose minimum threat to life.
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Data Availability
All data generated or analyzed during this study is included in this article.
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Acknowledgements
This study was supported by Gazi University Research Fund under the project number 04/2016-03.
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This study was supported by Gazi University Research Fund under the project number 04/2016-03.
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C.A. Ozel and D. Yuzbasioglu designed the research and carried out the experimental stages, collected the experimental data and wrote the article. F. Unal contributed the comet assay and the statistical analyses and write up of the article. E. Avuloglu-Yilmaz and E. Erikel contributed to all the experimental stages including writing of the article. S. Mirici contributed to tissue culture stages. All authors have read and approved the manuscript.
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Ozel, C.A., Unal, F., Avuloglu-Yilmaz, E. et al. Determination of genotoxic damages of picloram and dicamba with comet assay in Allium cepa rooted in tissue culture and distilled water. Mol Biol Rep 49, 11273–11280 (2022). https://doi.org/10.1007/s11033-022-07712-7
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DOI: https://doi.org/10.1007/s11033-022-07712-7