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Simulated Space Radiation: Impact of Four Different Types of High-Dose Ionizing Radiation on the Lichen Xanthoria elegans

Brandt, Annette and Meeßen, Joachim and Jänicke, Reiner U. and Raguse, Marina and Ott, Sieglinde (2017) Simulated Space Radiation: Impact of Four Different Types of High-Dose Ionizing Radiation on the Lichen Xanthoria elegans. Astrobiology, 17 (2), pp. 136-144. Mary Ann Liebert Inc.. DOI: 10.1089/ast.2015.1455 ISSN 1531-1074

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Official URL: http://online.liebertpub.com/doi/abs/10.1089/ast.2015.1455?src=recsys


This study addresses the viability of the lichen Xanthoria elegans after high-dose ionizing irradiation in the frame of the STARLIFE campaign. The first set of experiments was intended to resemble several types of galactic cosmic radiation (GCR) as present beyond the magnetic shield of Earth. In the second set of experiments, γ radiation up to 113 kGy was applied to test the limit of lichen resistance to ionizing radiation. Entire thalli of Xanthoria elegans were irradiated in the anhydrobiotic state. After STARLIFE 1, the metabolic activity of both symbionts was quantified by live/dead staining with confocal laser scanning microscopy. The photosynthetic activity was measured after the respective irradiation to assess the ability of the symbiotic green algae to restore photosynthesis after irradiation. The STARLIFE campaign complements the results of the LIFE experiments at the EXPOSE-E facility on the International Space Station by testing the model organism Xanthoria elegans on its resistance to hazardous radiation that might be accumulated during long-term space exposure. In addition, the photosynthetic activity of metabolically active lichen was investigated after X-ray irradiation up to 100 Gy (3.3 Gy/min). Since previous astrobiological experiments were mostly performed with anhydrobiotic lichen, these experiments will broaden our knowledge on the correlation of physiological state and astrobiological stressors.

Item URL in elib:https://elib.dlr.de/111354/
Document Type:Article
Title:Simulated Space Radiation: Impact of Four Different Types of High-Dose Ionizing Radiation on the Lichen Xanthoria elegans
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brandt, AnnetteInstitute of Botany, Heinrich-Heine-University (HHU), Düsseldorf, GermanyUNSPECIFIED
Meeßen, JoachimInstitute of Botany, Heinrich-Heine-University (HHU), Düsseldorf, GermanyUNSPECIFIED
Jänicke, Reiner U.Laboratory of Molecular Radiooncology, University of Düsseldorf, Düsseldorf, GermanyUNSPECIFIED
Raguse, MarinaSpace Microbiology Research Group, Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, GermanyUNSPECIFIED
Ott, SieglindeInstitute of Botany, Heinrich-Heine-University (HHU), Düsseldorf, GermanyUNSPECIFIED
Journal or Publication Title:Astrobiology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1089/ast.2015.1455
Page Range:pp. 136-144
Publisher:Mary Ann Liebert Inc.
Keywords:Astrobiology, Extremotolerance, Gamma rays, Ionizing Radiation, Lichens, Viability
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:07 Mar 2017 12:51
Last Modified:06 Sep 2019 15:23

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