干旱区生态环境知识资源中心(Arid): Survivability of Anhydrobiotic Cyanobacteria in Salty Ice: Implications for the Habitability of Icy Worlds

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DOI	10.3390/life9040086
	Survivability of Anhydrobiotic Cyanobacteria in Salty Ice: Implications for the Habitability of Icy Worlds
	Cosciotti, Barbara 1; Balbi, Amedeo 2; Ceccarelli, Alessandra 1; Fagliarone, Claudia 3; Mattei, Elisabetta 1; Lauro, Sebastian Emanuel 1; Di Paolo, Federico 1; Pettinelli, Elena 1; Billi, Daniela 3
通讯作者	Billi, Daniela
来源期刊	LIFE-BASEL
EISSN	2075-1729
出版年	2019
卷号	9 期号:4
英文摘要	Two anhydrobiotic strains of the cyanobacterium Chroococcidiopsis, namely CCMEE 029 and CCMEE 171, isolated from the Negev Desert in Israel and from the Dry Valleys in Antarctica, were exposed to salty-ice simulations. The aim of the experiment was to investigate the cyanobacterial capability to survive under sub-freezing temperatures in samples simulating the environment of icy worlds. The two strains were mixed with liquid solutions having sub-eutectic concentration of Na2SO4, MgSO4 and NaCl, then frozen down to different final temperatures (258 K, 233 K and 203 K) in various experimental runs. Both strains survived the exposure to 258 K in NaCl solution, probably as they migrated in the liquid veins between ice grain boundaries. However, they also survived at 258 K in Na2SO4 and MgSO4-salty-ice samples-that is, a temperature well below the eutectic temperature of the solutions, where liquid veins should not exist anymore. Moreover, both strains survived the exposure at 233 K in each salty-ice sample, with CCMEE 171 showing an enhanced survivability, whereas there were no survivors at 203 K. The survival limit at low temperature was further extended when both strains were exposed to 193 K as air-dried cells. The results suggest that vitrification might be a strategy for microbial life forms to survive in potentially habitable icy moons, for example in Europa's icy crust. By entering a dried, frozen state, they could be transported from niches, which became non-habitable to new habitable ones, and possibly return to metabolic activity.
英文关键词	vitrification desert cyanobacteria laboratory simulations habitability Europa icy moons liquid veins ice crystals
类型	Article
语种	英语
国家	Italy
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000505571000004
WOS关键词	MICROBIAL LIFE ; SEA-ICE ; GREENLAND ; EUROPA ; DESERT ; GROWTH ; DEATH
WOS类目	Biology ; Microbiology
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Microbiology
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311089
作者单位	1.Univ Rome Tre, Dept Math & Phys, I-00154 Rome, Italy; 2.Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy; 3.Univ Roma Tor Vergata, Dept Biol, I-00133 Rome, Italy
推荐引用方式 GB/T 7714	Cosciotti, Barbara,Balbi, Amedeo,Ceccarelli, Alessandra,et al. Survivability of Anhydrobiotic Cyanobacteria in Salty Ice: Implications for the Habitability of Icy Worlds[J],2019,9(4).
APA	Cosciotti, Barbara.,Balbi, Amedeo.,Ceccarelli, Alessandra.,Fagliarone, Claudia.,Mattei, Elisabetta.,...&Billi, Daniela.(2019).Survivability of Anhydrobiotic Cyanobacteria in Salty Ice: Implications for the Habitability of Icy Worlds.LIFE-BASEL,9(4).
MLA	Cosciotti, Barbara,et al."Survivability of Anhydrobiotic Cyanobacteria in Salty Ice: Implications for the Habitability of Icy Worlds".LIFE-BASEL 9.4(2019).