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DOI | 10.1007/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
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ISSN | 0169-6149 |
EISSN | 1573-0875 |
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 |
推荐引用方式 GB/T 7714 | 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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