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DOI | 10.1007/s11084-015-9467-9 |
Preservation of Biomarkers from Cyanobacteria Mixed with Mars Like Regolith Under Simulated Martian Atmosphere and UV Flux | |
Baque, Mickael1; Verseux, Cyprien1; Boettger, Ute2; Rabbow, Elke3; de Vera, Jean-Pierre Paul2; Billi, Daniela1,4 | |
通讯作者 | Billi, Daniela |
会议名称 | 14th European Astrobiology Conference (EANA) |
会议日期 | OCT 13-16, 2014 |
会议地点 | Edinburgh, SCOTLAND |
英文摘要 | The space mission EXPOSE-R2 launched on the 24th of July 2014 to the International Space Station is carrying the BIOMEX (BIOlogy and Mars EXperiment) experiment aimed at investigating the endurance of extremophiles and stability of biomolecules under space and Mars-like conditions. In order to prepare the analyses of the returned samples, ground-based simulations were carried out in Planetary and Space Simulation facilities. During the ground-based simulations, Chroococcidiopsis cells mixed with two Martian mineral analogues (phyllosilicatic and sulfatic Mars regolith simulants) were exposed to a Martian simulated atmosphere combined or not with UVirradiation corresponding to the dose received during a 1-year-exposure in low Earth orbit (or half a Martian year on Mars). Cell survival and preservation of potential biomarkers such as photosynthetic and photoprotective pigments or DNA were assessed by colony forming ability assays, confocal laser scanning microscopy, Raman spectroscopy and PCR-based assays. DNA and photoprotective pigments (carotenoids) were detectable after simulations of the space mission (570 MJ/m(2) of UV 200-400 nm irradiation and Martian simulated atmosphere), even though signals were attenuated by the treatment. The fluorescence signal from photosynthetic pigments was differently preserved after UV irradiation, depending on the thickness of the samples. UV irradiation caused a high background fluorescence of the Martian mineral analogues, as revealed by Raman spectroscopy. Further investigation will be needed to ensure unambiguous identification and operations of future Mars missions. However, a 3-month exposure to a Martian simulated atmosphere showed no significant damaging effect on the tested cyanobacterial biosignatures, pointing out the relevance of the latter for future investigations after the EXPOSE-R2 mission. Data gathered during the ground-based simulations will contribute to interpret results from space experiments and guide our search for life on Mars. |
英文关键词 | Astrobiology Cyanobacteria Biosignatures Martian regoliths EXPOSE-R2 |
来源出版物 | ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES |
ISSN | 0169-6149 |
EISSN | 1573-0875 |
出版年 | 2016 |
卷号 | 46 |
期号 | 2-3 |
页码 | 289-310 |
出版者 | SPRINGER |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | Italy;Germany |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000385183300011 |
WOS关键词 | RAMAN-SPECTROSCOPIC ANALYSIS ; LIFE MARKER CHIP ; LOW-EARTH-ORBIT ; IN-SITU ; EXOMARS MISSION ; RADIATION-RESISTANCE ; ANTARCTIC HABITATS ; IONIZING-RADIATION ; MICROBIAL LIFE ; MOJAVE DESERT |
WOS类目 | Biology |
WOS研究方向 | Life Sciences & Biomedicine - Other Topics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/304796 |
作者单位 | 1.Univ Roma Tor Vergata, Dept Biol, Rome, Italy; 2.German Aerosp Ctr DLR, Inst Planetary Res, Berlin, Germany; 3.German Aerosp Ctr DLR, Inst Aerosp Med, Radiat Biol Dept, Cologne, Germany; 4.Univ Roma Tor Vergata, Dipartimento Biol, Rome, Italy |
推荐引用方式 GB/T 7714 | Baque, Mickael,Verseux, Cyprien,Boettger, Ute,et al. Preservation of Biomarkers from Cyanobacteria Mixed with Mars Like Regolith Under Simulated Martian Atmosphere and UV Flux[C]:SPRINGER,2016:289-310. |
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