干旱区生态环境知识资源中心(Arid): Biomarker Preservation and Survivability Under Extreme Dryness and Mars-Like UV Flux of a Desert Cyanobacterium Capable of Trehalose and Sucrose Accumulation

Arid

DOI	10.3389/fspas.2020.00031
	Biomarker Preservation and Survivability Under Extreme Dryness and Mars-Like UV Flux of a Desert Cyanobacterium Capable of Trehalose and Sucrose Accumulation
	Fagliarone, Claudia; Napoli, Alessandro; Chiavarini, Salvatore; Baque, Mickael; de Vera, Jean-Pierre; Billi, Daniela
通讯作者	Billi, D
来源期刊	FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
ISSN	2296-987X
出版年	2020
卷号	7
英文摘要	Unraveling how long life can persist under extreme dryness and what kind of environmental extremes can be faced by dried microorganisms is relevant to understand Mars habitability and to search for life on planets with transient liquid water availability. Because trehalose and sucrose stabilize dried anhydrobiotes, anin silicosurvey of the genome of the desert cyanobacteriumChroococcidiopsissp. CCMEE 029 was performed to identify pathways for trehalose and sucrose biosynthesis. The expression of the identified genes was induced in response to desiccation, and trehalose and sucrose accumulation was detected in dried cells. This adaptation strategy enabled viability and biomarker permanence under extreme dryness and Mars-like UV flux.Chroococcidiopsissurvivors were scored in 7-year dried biofilms mixed with phyllosilicatic Mars regolith simulant and exposed to 5.5 x 10(3)kJ/m(2)of a Mars-like UV flux. No survivors occurred after exposure to 5.5 x 10(5)kJ/m(2)although, in dead cells, photosynthetic pigments, and nucleic acids, both DNA and RNA, were still detectable. This suggests that dried biofilms mixed with phyllosilicatic Martian regolith simulant are suitable candidates to identify biosignatures embedded in planetary analog minerals as planned in the future BioSignatures and habitable Niches (BioSigN) space mission to be performed outside the International Space Station.
英文关键词	biosignatures anhydrobiosis Mars simulation desert cyanobacteria life detection
类型	Article
语种	英语
开放获取类型	DOAJ Gold, Green Accepted
收录类别	ESCI
WOS记录号	WOS:000556602700001
WOS关键词	HABITABILITY ; LIFE ; DESICCATION ; CHROOCOCCIDIOPSIS ; EARTH ; VITRIFICATION ; ASTROBIOLOGY ; CONSTRAINTS ; RESISTANCE ; TOLERANCE
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334520
作者单位	[Fagliarone, Claudia; Napoli, Alessandro; Billi, Daniela] Univ Roma Tor Vergata, Dept Biol, Lab Astrobiol & Mol Biol Cyanobacteria, Rome, Italy; [Chiavarini, Salvatore] ENEA Casaccia, SSPT PROTER Div, Rome, Italy; [Baque, Mickael; de Vera, Jean-Pierre] German Aerosp Ctr DLR, Inst Planetary Res, Dept Planetary Labs, Astrobiol Labs, Berlin, Germany
推荐引用方式 GB/T 7714	Fagliarone, Claudia,Napoli, Alessandro,Chiavarini, Salvatore,et al. Biomarker Preservation and Survivability Under Extreme Dryness and Mars-Like UV Flux of a Desert Cyanobacterium Capable of Trehalose and Sucrose Accumulation[J],2020,7.
APA	Fagliarone, Claudia,Napoli, Alessandro,Chiavarini, Salvatore,Baque, Mickael,de Vera, Jean-Pierre,&Billi, Daniela.(2020).Biomarker Preservation and Survivability Under Extreme Dryness and Mars-Like UV Flux of a Desert Cyanobacterium Capable of Trehalose and Sucrose Accumulation.FRONTIERS IN ASTRONOMY AND SPACE SCIENCES,7.
MLA	Fagliarone, Claudia,et al."Biomarker Preservation and Survivability Under Extreme Dryness and Mars-Like UV Flux of a Desert Cyanobacterium Capable of Trehalose and Sucrose Accumulation".FRONTIERS IN ASTRONOMY AND SPACE SCIENCES 7(2020).