Arid
DOI10.1007/s11084-009-9167-4
Survival of Akinetes (Resting-State Cells of Cyanobacteria) in Low Earth Orbit and Simulated Extraterrestrial Conditions
Olsson-Francis, Karen1; de la Torre, Rosa2; Towner, Martin C.1; Cockell, Charles S.1
通讯作者Olsson-Francis, Karen
来源期刊ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES
ISSN0169-6149
EISSN1573-0875
出版年2009
卷号39期号:6页码:565-579
英文摘要

Cyanobacteria are photosynthetic organisms that have been considered for space applications, such as oxygen production in bioregenerative life support systems, and can be used as a model organism for understanding microbial survival in space. Akinetes are resting-state cells of cyanobacteria that are produced by certain genera of heterocystous cyanobacteria to survive extreme environmental conditions. Although they are similar in nature to endospores, there have been no investigations into the survival of akinetes in extraterrestrial environments. The aim of this work was to examine the survival of akinetes from Anabaena cylindrica in simulated extraterrestrial conditions and in Low Earth Orbit (LEO). Akinetes were dried onto limestone rocks and sent into LEO for 10 days on the ESA Biopan VI. In ground-based experiments, the rocks were exposed to periods of desiccation, vacuum (0.7 x 10(-3) kPa), temperature extremes (-80 to 80A degrees C), Mars conditions (-27A degrees C, 0.8 kPa, CO2) and UV radiation (325-400 nm). A proportion of the akinete population was able to survive a period of 10 days in LEO and 28 days in Mars simulated conditions, when the rocks were not subjected to UV radiation. Furthermore, the akinetes were able to survive 28 days of exposure to desiccation and low temperature with high viability remaining. Yet long periods of vacuum and high temperature were lethal to the akinetes. This work shows that akinetes are extreme-tolerating states of cyanobacteria that have a practical use in space applications and yield new insight into the survival of microbial resting-state cells in space conditions.


英文关键词Cyanobacteria Akinetes Low Earth Orbit Mars environment
类型Article
语种英语
国家England ; Spain
收录类别SCI-E
WOS记录号WOS:000271987400006
WOS关键词ANABAENA-CYLINDRICA ; UV-RADIATION ; LIFE-SUPPORT ; DIFFERENTIATION ; DESICCATION ; SPORES ; TEMPERATURE ; MECHANISMS ; HETEROCYST ; DESERT
WOS类目Biology
WOS研究方向Life Sciences & Biomedicine - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/162094
作者单位1.Open Univ, Ctr Earth Planetary Space & Astron Res, Milton Keynes MK7 6AA, Bucks, England;
2.Inst Nacl Tecn Aeroespacial, Madrid, Spain
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Olsson-Francis, Karen,de la Torre, Rosa,Towner, Martin C.,et al. Survival of Akinetes (Resting-State Cells of Cyanobacteria) in Low Earth Orbit and Simulated Extraterrestrial Conditions[J],2009,39(6):565-579.
APA Olsson-Francis, Karen,de la Torre, Rosa,Towner, Martin C.,&Cockell, Charles S..(2009).Survival of Akinetes (Resting-State Cells of Cyanobacteria) in Low Earth Orbit and Simulated Extraterrestrial Conditions.ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES,39(6),565-579.
MLA Olsson-Francis, Karen,et al."Survival of Akinetes (Resting-State Cells of Cyanobacteria) in Low Earth Orbit and Simulated Extraterrestrial Conditions".ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES 39.6(2009):565-579.
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