Abstract
All organisms on Earth are exposed to low doses of natural radioactivity but some habitats are more radioactive than others. Yet, documenting the influence of natural radioactivity on the evolution of biodiversity is challenging. Here, we addressed whether organisms living in naturally more radioactive habitats accumulate more mutations across generations using 14 species of waterlice living in subterranean habitats with contrasted levels of radioactivity. We found that the mitochondrial and nuclear mutation rates across a waterlouse species' genome increased on average by 60 and 30%, respectively, when radioactivity increased by a factor of three. We also found a positive correlation between the level of radioactivity and the probability of G to T (and complementary C to A) mutations, a hallmark of oxidative stress. We conclude that even low doses of natural bedrock radioactivity influence the mutation rate possibly through the accumulation of oxidative damage, in particular in the mitochondrial genome.
Article and author information
Author details
Funding
Centre National de la Recherche Scientifique (STYGOMICS - Défi enviromix)
- Patrick Chardon
- Florian Malard
- Lara Konecny-Dupré
- Tristan Lefebure
- Christophe J Douady
Agence Nationale de la Recherche (ANR- 15-CE32-0005 Convergenomix)
- Lara Konecny-Dupré
- Laurent Duret
- Tristan Lefebure
- Christophe J Douady
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Reviewing Editor
- Molly Przeworski, Columbia University, United States
Publication history
- Received: March 11, 2020
- Accepted: November 30, 2020
- Accepted Manuscript published: November 30, 2020 (version 1)
- Version of Record published: December 8, 2020 (version 2)
Copyright
© 2020, Saclier et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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