Effects of temperature, chloride and perchlorate salt concentration on the metabolic activity of Deinococcus radiodurans
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The extremophile bacterium Deinococcus radiodurans is characterized by its ability to survive and sustain its activity at high levels of radiation and is considered an organism that might survive in extraterrestrial environments. In the present work, we studied the combined effects of temperature and chlorine-containing salts, with focus on perchlorate salts which have been detected at high concentrations in Martian regolith, on D. radiodurans activity (CO2 production rates) and viability after incubation in liquid cultures for up to 30 days. Reduced CO2 production capacity and viability was observed at high perchlorate concentrations (up to 10% w/v) during incubation at 0 or 25 °C. Both the metabolic activity and viability were reduced as the perchlorate and chloride salt concentration increased and temperature decreased, and an interactive effect of temperature and salt concentration on the metabolic activity was found. These results indicate the ability of D. radiodurans to remain metabolically active and survive in low temperature environments rich in perchlorate.
Originalsprog | Engelsk |
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Artikelnummer | 34 |
Tidsskrift | Extremophiles |
Vol/bind | 28 |
Udgave nummer | 3 |
Antal sider | 8 |
ISSN | 1431-0651 |
DOI | |
Status | Udgivet - 2024 |
Bibliografisk note
Funding Information:
We acknowledge Dr H. Kiesewalter for his suggestions and help during the experiments. We greatly thank A. H\u00F8rdum L\u00F8th, G. Sylvester, M. Holm Wahlgren and A. L\u00FCchau for their support and technical assistance. We thank the members of the Section of Microbiology, University of Copenhagen and Section for Star and Planetary Formation, University of Copenhagen. Finally, we thank an anonymous reviewer for valuable input improving the manuscript.
Publisher Copyright:
© The Author(s) 2024.
ID: 399670836