Characterization of Viability of the Lichen Buellia frigida After 1.5 Years in Space on the International Space Station

被引：5
|
作者：
Backhaus, Theresa [1 ]
Meessen, Joachim [1 ]
Demets, Rene [2 ]
de Vera, Jean-Pierre [3 ]
Ott, Sieglinde [1 ]
机构：
[1] Heinrich Heine Univ, Inst Bot, Univ Str 1, D-40225 Dusseldorf, Germany
[2] European Space Agcy, European Space Res & Technol Ctr ESTEC, Noordwijk, Netherlands
[3] German Aerosp Ctr DLR, Inst Planetary Res Management & Infrastruct, Astrobiol Labs, Res Grp, Berlin, Germany
来源：
ASTROBIOLOGY | 2019年 / 19卷 / 02期
关键词：
Astrobiology; BIOMEX; Lichen; Space conditions; Mars analog conditions; SIMULATED MARS CONDITIONS; UV-RADIATION CONDITIONS; PHOTOSYNTHETIC ACTIVITY; CIRCINARIA-GYROSA; ORGANIC-MOLECULES; MARTIAN REGOLITH; DNA PHOTOLYASE; UVC254; NM; EXPOSE-E; RESISTANCE;
D O I：
10.1089/ast.2018.1894
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The lichen Buellia frigida was exposed to space and simulated Mars analog conditions in the Biology and Mars Experiment (BIOMEX) project operated outside the International Space Station (ISS) for 1.5 years. To determine the effects of the Low Earth Orbit (LEO) conditions on the lichen symbionts, a LIVE/DEAD staining analysis test was performed. After return from the ISS, the lichen symbionts demonstrated mortality rates of up to 100% for the algal symbiont and up to 97.8% for the fungal symbiont. In contrast, the lichen symbiont controls exhibited mortality rates of 10.3% up to 31.9% for the algal symbiont and 14.5% for the fungal symbiont. The results performed in the BIOMEX Mars simulation experiment on the ISS indicate that the potential for survival and the resistance of the lichen B. frigida to LEO conditions are very low. It is unlikely that Mars could be inhabited by this lichen, even for a limited amount of time, or even not habitable planet for the tested lichen symbionts.
引用
收藏
页码：233 / 241
页数：9
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