Extremophiles Survival to Simulated Space Conditions: An Astrobiology Model Study
- 852 Downloads
In this work we investigated the ability of four extremophilic bacteria from Archaea and Bacteria domains to resist to space environment by exposing them to extreme conditions of temperature, UV radiation, desiccation coupled to low pressure generated in a Mars’ conditions simulator. All the investigated extremophilic strains (namely Sulfolobus solfataricus, Haloterrigena hispanica, Thermotoga neapolitana and Geobacillus thermantarcticus) showed a good resistance to the simulation of the temperature variation in the space; on the other hand irradiation with UV at 254 nm affected only slightly the growth of H. hispanica, G. thermantarcticus and S. solfataricus; finally exposition to Mars simulated condition showed that H. hispanica and G. thermantarcticus were resistant to desiccation and low pressure.
KeywordsExtremophiles Temperature resistance UV resistance Mars simulated conditions
This work has been implemented in the frame of the project PON01_01966 “Integrated agro-industrial chains with high energy efficiency for the development of eco-compatible processes of energy and biochemicals production from renewable sources and for the land valorisation” funded by “MIUR- Ministero dell’Istruzione, dell’Università e della Ricerca”.
- Coorevits A, Dinsdale AE. Halket G, Lebbe L, De Vos P, Van Landschoot A, Logan NA (2012) Taxonomic revision of the genus Geobacillus: emendation of Geobacillus, G. stearothermophilus, G. jurassicus, G. toebii, G. thermodenitrificans and G. thermoglucosidans (nom. corrig., formerly ‘thermoglucosidasius’); transfer of Bacillus thermantarcticus to the genus as G. thermantarcticus; proposal of Caldibacillus debilis gen. nov., comb. nov.; transfer of G. tepidamans to Anoxybacillus as A. tepidamans and proposal of Anoxybacillus caldiproteolyticus sp. nov. Int J Syst Evol Microbiol 62:1470–1485Google Scholar
- Zilling W, Stetter KO, Wunderl S, Schulz W, Priess H, Scholz I (1980) The Sulfolobus – “Caldariella” group: taxonomy on the basis of the structure of DNA-dependent RNA polymerases. Ach Microbiol 125:259–269Google Scholar