elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

The Effect of High-Dose Ionizing Radiation on the Astrobiological Model Lichen Circinaria gyrosa

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

Full text not available from this repository.

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/
Document Type:Article
Title:The Effect of High-Dose Ionizing Radiation on the Astrobiological Model Lichen Circinaria gyrosa
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
de la Torre, RosaDepartamento de Observación de la Tierra, Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain.UNSPECIFIED
Miller, Ana ZéliaInstituto de Recursos Naturales y Agrobiología de Sevilla—CSIC, Sevilla, Spain.UNSPECIFIED
Cubero, BeatrizInstituto de Recursos Naturales y Agrobiología de Sevilla—CSIC, Sevilla, Spain.UNSPECIFIED
Martín-Cerezo, M. LuisaDepartamento de Observación de la Tierra, Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain.UNSPECIFIED
Raguse, MarinaRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIED
Meeßen, JoachimInstitute of Botany, Heinrich-Heine-University (HHU), Düsseldorf, Germany.UNSPECIFIED
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 - 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 12:52
Last Modified:06 Sep 2019 15:23

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.