2015
DOI: 10.1007/s11084-015-9470-1
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Characterisation of Growth and Ultrastructural Effects of the Xanthoria elegans Photobiont After 1.5 Years of Space Exposure on the International Space Station

Abstract: The lichen Xanthoria elegans has been exposed to space and simulated Mars-analogue environment in the Lichen and Fungi Experiment (LIFE) on the EXPOSE-E facility at the International Space Station (ISS). This long-term exposure of 559 days tested the ability of various organisms to cope with either low earth orbit (LEO) or Mars-analogue conditions, such as vacuum, Mars-analogue atmosphere, rapid temperature cycling, cosmic radiation of up to 215 ± 16 mGy, and insolation of accumulated doses up to 4.87 GJm(-2),… Show more

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Cited by 13 publications
(14 citation statements)
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“…LIFE on EXPOSE-E After exposure to space conditions, the lichen X. elegans showed by photosynthetic activity with a PSII activity of 45 (±2.50%). Resistance of X. elegans and its mycobiont and photobiont was confirmed by vital staining and Confocal Laser Scanning Microscopy, and growth tests (Brandt et al 2015(Brandt et al , 2016. R. geographicum showed lower values.…”
Section: Exposementioning
confidence: 90%
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“…LIFE on EXPOSE-E After exposure to space conditions, the lichen X. elegans showed by photosynthetic activity with a PSII activity of 45 (±2.50%). Resistance of X. elegans and its mycobiont and photobiont was confirmed by vital staining and Confocal Laser Scanning Microscopy, and growth tests (Brandt et al 2015(Brandt et al , 2016. R. geographicum showed lower values.…”
Section: Exposementioning
confidence: 90%
“…The study of the stability of prokaryotic bio-indicators (such as hopanoids and hopanes like diploptene and diplopterol) is of prime interest because, if life occurred on Mars, it was likely under a primitive form (such as terrestrial prokaryotic organisms), due to the short period of favorable conditions. Hopanoids and hopanes can resist terrestrial alteration by reductive or oxidative environments, diagenesis or catagenesis processes up to a couple of billion years (Brocks et al 2003(Brocks et al , 1999. It is therefore of great interest to investigate their stability versus radiation and/or to determine whether they produce new resistant organic compounds with regard to the search Fig.…”
Section: Organic Molecules and Biosignatures At Mars Surfacementioning
confidence: 99%
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“…A range of organisms have already been investigated in these habitats such as microbial communities collected in permafrost soils (Hansen et al, 2009), endolithic cyanobacteria from deserts (Baqué et al, 2013), or cryptoendolithic fungi from Antarctica Selbmann et al, 2015;Pacelli et al, 2016). Furthermore, epilithic organisms were frequently investigated, such as phototrophic biofilms Cockell et al, 2011) or a wide range of lichens from northern hemispheric steppes (de la Torre et al, 2010;Sánchez et al, 2012), continental Antarctica (de Vera et al, 2014;Meeßen et al, 2015), as well as from polar and alpine habitats (de Vera, 2012;Brandt et al, 2016Brandt et al, , 2017.…”
Section: Introductionmentioning
confidence: 99%
“…Lichens are traditional model organisms for symbioses and well-known for their persistence under extreme conditions. In their desiccated stage, they can even survive under Martian conditions simulated on Earth, or even in space ( de Vera et al, 2010 ; Brandt et al, 2015 , 2016 ). Despite their often unnoticed appearance, lichens are found in most terrestrial habitats and cover a substantial portion of Earth’s land surface ( Ahmadjian, 1995 ).…”
Section: Introductionmentioning
confidence: 99%