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Article Dans Une Revue Scientific Reports Année : 2019

Reducing the ionizing radiation background does not significantly affect the evolution of Escherichia coli populations over 500 generations

Nathanael Lampe
Pierre Marin
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  • PersonId : 846554
Marianne Coulon
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  • PersonId : 1027627
Pierre Micheau
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  • PersonId : 1204443
Lydia Maigne
David Sarramia
Vincent Breton
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  • PersonId : 917630

Résumé

Over millennia, life has been exposed to ionizing radiation from cosmic rays and natural radioisotopes. Biological experiments in underground laboratories have recently demonstrated that the contemporary terrestrial radiation background impacts the physiology of living organisms, yet the evolutionary consequences of this biological stress have not been investigated. Explaining the mechanisms that give rise to the results of underground biological experiments remains difficult, and it has been speculated that hereditary mechanisms may be involved. Here, we have used evolution experiments in standard and very low-radiation backgrounds to demonstrate that environmental ionizing radiation does not significantly impact the evolutionary trajectories of E. coli bacterial populations in a 500 generations evolution experiment.
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Dates et versions

hal-02337251 , version 1 (20-11-2020)

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Nathanael Lampe, Pierre Marin, Marianne Coulon, Pierre Micheau, Lydia Maigne, et al.. Reducing the ionizing radiation background does not significantly affect the evolution of Escherichia coli populations over 500 generations. Scientific Reports, 2019, 9 (1), pp.14891. ⟨10.1038/s41598-019-51519-9⟩. ⟨hal-02337251⟩
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