干旱区生态环境知识资源中心(Arid): A Desert Cyanobacterium under Simulated Mars-like Conditions in Low Earth Orbit: Implications for the Habitability of Mars

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DOI	10.1089/ast.2017.1807
	A Desert Cyanobacterium under Simulated Mars-like Conditions in Low Earth Orbit: Implications for the Habitability of Mars
	Billi, Daniela 1; Verseux, Cyprien 1; Fagliarone, Claudia 1; Napoli, Alessandro 1; Baque, Mickael 2; de Vera, Jean-Pierre 2
通讯作者	Billi, Daniela
来源期刊	ASTROBIOLOGY
ISSN	1531-1074
EISSN	1557-8070
出版年	2019
卷号	19 期号:2 页码:158-169
英文摘要	In the ESA space experiment BIOMEX (BIOlogy and Mars EXperiment), dried Chroococcidiopsis cells were exposed to Mars-like conditions during the EXPOSE-R2 mission on the International Space Station. The samples were exposed to UV radiation for 469 days and to a Mars-like atmosphere for 722 days, approaching the conditions that could be faced on the surface of Mars. Once back on Earth, cell survival was tested by growth-dependent assays, while confocal laser scanning microscopy and PCR-based assay were used to analyze the accumulated damage in photosynthetic pigments (chlorophyll a and phycobiliproteins) and genomic DNA, respectively. Survival occurred only for dried cells (4-5 cell layers thick) mixed with the martian soil simulants P-MRS (phyllosilicatic martian regolith simulant) and S-MRS (sulfatic martian regolith simulant), and viability was only maintained for a few hours after space exposure to a total UV (wavelength from 200 to 400 nm) radiation dose of 492 MJ/m(2) (attenuated by 0.1% neutral density filters) and 0.5 Gy of ionizing radiation. These results have implications for the hypothesis that, during Mars's climatic history, desiccation- and radiation-tolerant life-forms could have survived in habitable niches and protected niches while transported.
英文关键词	Cyanobacteria Mars Extreme environments Habitability Low Earth orbit
类型	Article
语种	英语
国家	Italy ; Germany
收录类别	SCI-E
WOS记录号	WOS:000463364800002
WOS关键词	RADIATION-RESISTANCE ; CHROOCOCCIDIOPSIS ; ASTROBIOLOGY ; SPACE ; LIFE ; DESICCATION ; HIP1 ; DNA ; MICROORGANISMS ; PRESERVATION
WOS类目	Astronomy & Astrophysics ; Biology ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214417
作者单位	1.Univ Roma Tor Vergata, Dept Biol, Via Ric Sci, I-00133 Rome, Italy; 2.German Aerosp Ctr, Inst Planetary Res Management & Infrastruct, Astrobiol Labs, Berlin, Germany
推荐引用方式 GB/T 7714	Billi, Daniela,Verseux, Cyprien,Fagliarone, Claudia,et al. A Desert Cyanobacterium under Simulated Mars-like Conditions in Low Earth Orbit: Implications for the Habitability of Mars[J],2019,19(2):158-169.
APA	Billi, Daniela,Verseux, Cyprien,Fagliarone, Claudia,Napoli, Alessandro,Baque, Mickael,&de Vera, Jean-Pierre.(2019).A Desert Cyanobacterium under Simulated Mars-like Conditions in Low Earth Orbit: Implications for the Habitability of Mars.ASTROBIOLOGY,19(2),158-169.
MLA	Billi, Daniela,et al."A Desert Cyanobacterium under Simulated Mars-like Conditions in Low Earth Orbit: Implications for the Habitability of Mars".ASTROBIOLOGY 19.2(2019):158-169.