de la Torre, Rosa and Miller, Ana Zélia and Cubero, Beatriz and Martín-Cerezo, M. Luisa and Raguse, Marina and Meeßen, Joachim (2017) The Effect of High-Dose Ionizing Radiation on the Astrobiological Model Lichen Circinaria gyrosa. Astrobiology, 17 (2), pp. 145-153. Mary Ann Liebert Inc.. doi: 10.1089/ast.2015.1454. ISSN 1531-1074.
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Official URL: http://online.liebertpub.com/doi/abs/10.1089/ast.2015.1454
Abstract
The lichen Circinaria gyrosa is an astrobiological model defined by its high capacity of resistance to space conditions and to a simulated martian environment. Therefore, it became part of the currently operated BIOMEX experiment on board the International Space Station and the recent STARLIFE campaign to study the effects of four types of space-relevant ionizing radiation. The samples were irradiated with helium and iron ions at doses up to 2 kGy, with X-rays at doses up to 5 kGy and with γ rays at doses from 6 to 113 kGy. Results on C. gyrosa's resistance to simulated space ionizing radiation and its post-irradiation viability were obtained by (i) chlorophyll a fluorescence of photosystem II (PSII), (ii) epifluorescence microscopy, (iii) confocal laser scanning microscopy (CLSM), and (iv) field emission scanning electron microscopy (FESEM). Results of photosynthetic activity and epifluorescence show no significant changes up to a dose of 1 kGy (helium ions), 2 kGy (iron ions), 5 kGy (X-rays)—the maximum doses applied for those radiation qualities—as well as a dose of 6 kGy of γ irradiation, which was the lowest dose applied for this low linear energy transfer (LET) radiation. Significant damage in a dose-related manner was observed only at much higher doses of γ irradiation (up to 113 kGy). These data corroborate the findings of the parallel STARLIFE studies on the effects of ionizing radiation on the lichen Circinaria gyrosa, its isolated photobiont, and the lichen Xanthoria elegans.
Item URL in elib: | https://elib.dlr.de/111355/ | |||||||||||||||||||||
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Document Type: | Article | |||||||||||||||||||||
Title: | The Effect of High-Dose Ionizing Radiation on the Astrobiological Model Lichen Circinaria gyrosa | |||||||||||||||||||||
Authors: |
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Date: | 2017 | |||||||||||||||||||||
Journal or Publication Title: | Astrobiology | |||||||||||||||||||||
Refereed publication: | Yes | |||||||||||||||||||||
Open Access: | No | |||||||||||||||||||||
Gold Open Access: | No | |||||||||||||||||||||
In SCOPUS: | Yes | |||||||||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||||||||
Volume: | 17 | |||||||||||||||||||||
DOI: | 10.1089/ast.2015.1454 | |||||||||||||||||||||
Page Range: | pp. 145-153 | |||||||||||||||||||||
Publisher: | Mary Ann Liebert Inc. | |||||||||||||||||||||
ISSN: | 1531-1074 | |||||||||||||||||||||
Status: | Published | |||||||||||||||||||||
Keywords: | Simulated space ionizing Radiation, Gamma rays, Extremotolerance, Lichens, Circinaria gyrosa, Photosynthetic activity | |||||||||||||||||||||
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 - Research under Space Conditions | |||||||||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Strahlenbiologie (old) | |||||||||||||||||||||
Location: | Köln-Porz | |||||||||||||||||||||
Institutes and Institutions: | Institute of Aerospace Medicine > Radiation Biology | |||||||||||||||||||||
Deposited By: | Kopp, Kerstin | |||||||||||||||||||||
Deposited On: | 07 Mar 2017 12:52 | |||||||||||||||||||||
Last Modified: | 06 Sep 2019 15:23 |
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