Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1089/ast.2014.1278 |
Isolation of Radiation-Resistant Bacteria from Mars Analog Antarctic Dry Valleys by Preselection, and the Correlation between Radiation and Desiccation Resistance | |
Musilova, Michaela1; Wright, Gary2; Ward, John M.3; Dartnell, Lewis R.4,5 | |
通讯作者 | Musilova, Michaela |
来源期刊 | ASTROBIOLOGY
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ISSN | 1531-1074 |
EISSN | 1557-8070 |
出版年 | 2015 |
卷号 | 15期号:12页码:1076-1090 |
英文摘要 | Extreme radiation-resistant microorganisms can survive doses of ionizing radiation far greater than are present in the natural environment. Radiation resistance is believed to be an incidental adaptation to desiccation resistance, as both hazards cause similar cellular damage. Desert soils are, therefore, promising targets to prospect for new radiation-resistant strains. This is the first study to isolate radiation-resistant microbes by using gamma-ray exposure preselection from the extreme cold desert of the Antarctic Dry Valleys (a martian surface analogue). Halomonads, identified by 16S rRNA gene sequencing, were the most numerous survivors of the highest irradiation exposures. They were studied here for the first time for both their desiccation and irradiation survival characteristics. In addition, the association between desiccation and radiation resistance has not been investigated quantitatively before for a broad diversity of microorganisms. Thus, a meta-analysis of scientific literature was conducted to gather a larger data set. A strong correlation was found between desiccation and radiation resistance, indicating that an increase in the desiccation resistance of 5 days corresponds to an increase in the room-temperature irradiation survival of 1 kGy. Irradiation at -79 degrees C (representative of average martian surface temperatures) increases the microbial radiation resistance 9-fold. Consequently, the survival of the cold-, desiccation-, and radiation-resistant organisms isolated here has implications for the potential habitability of dormant or cryopreserved life on Mars. |
英文关键词 | Extremophiles Halomonas sp. Antarctica Mars Ionizing radiation Cosmic rays |
类型 | Article |
语种 | 英语 |
国家 | England |
收录类别 | SCI-E |
WOS记录号 | WOS:000366722500005 |
WOS关键词 | SIMULATED MARTIAN CONDITIONS ; IONIZING-RADIATION ; DEINOCOCCUS-RADIODURANS ; EXPERIMENT PROTECT ; MICROBIAL DIVERSITY ; GAMMA-IRRADIATION ; STRESS TOLERANCE ; LOW-TEMPERATURE ; SOIL NEMATODES ; TOTAL OZONE |
WOS类目 | Astronomy & Astrophysics ; Biology ; Geosciences, Multidisciplinary |
WOS研究方向 | Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Geology |
来源机构 | University of London |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/186009 |
作者单位 | 1.UCL, Dept Earth Sci, London, England; 2.Cranfield Univ, Dept Engn & Appl Sci, Swindon, Wilts, England; 3.UCL, Dept Biochem Engn, London, England; 4.UCL, UCL Inst Origins, London, England; 5.UCL, Ctr Planetary Sci, UCL Birkbeck, Earth Sci, London, England |
推荐引用方式 GB/T 7714 | Musilova, Michaela,Wright, Gary,Ward, John M.,et al. Isolation of Radiation-Resistant Bacteria from Mars Analog Antarctic Dry Valleys by Preselection, and the Correlation between Radiation and Desiccation Resistance[J]. University of London,2015,15(12):1076-1090. |
APA | Musilova, Michaela,Wright, Gary,Ward, John M.,&Dartnell, Lewis R..(2015).Isolation of Radiation-Resistant Bacteria from Mars Analog Antarctic Dry Valleys by Preselection, and the Correlation between Radiation and Desiccation Resistance.ASTROBIOLOGY,15(12),1076-1090. |
MLA | Musilova, Michaela,et al."Isolation of Radiation-Resistant Bacteria from Mars Analog Antarctic Dry Valleys by Preselection, and the Correlation between Radiation and Desiccation Resistance".ASTROBIOLOGY 15.12(2015):1076-1090. |
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