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Iron Ion Particle Radiation Resistance of Dried Colonies of Cryomyces antarcticus Embedded in Martian Regolith Analogues

Aureli, Lorenzo and Pacelli, Claudia and Cassaro, Alessia and Fujimori, Akira and Moeller, Ralf and Onofri, Silvano (2020) Iron Ion Particle Radiation Resistance of Dried Colonies of Cryomyces antarcticus Embedded in Martian Regolith Analogues. Life, 10 (12), p. 306. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/life10120306. ISSN 2075-1729.

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Official URL: http://dx.doi.org/10.3390/life10120306

Abstract

Among the celestial bodies in the Solar System, Mars currently represents the main target for the search for life beyond Earth. However, its surface is constantly exposed to high doses of cosmic rays (CRs) that may pose a threat to any biological system. For this reason, investigations into the limits of resistance of life to space relevant radiation is fundamental to speculate on the chance of finding extraterrestrial organisms on Mars. In the present work, as part of the STARLIFE project, the responses of dried colonies of the black fungus Cryomyces antarcticus Culture Collection of Fungi from Extreme Environments (CCFEE) 515 to the exposure to accelerated iron (LET: 200 keV/μm) ions, which mimic part of CRs spectrum, were investigated. Samples were exposed to the iron ions up to 1000 Gy in the presence of Martian regolith analogues. Our results showed an extraordinary resistance of the fungus in terms of survival, recovery of metabolic activity and DNA integrity. These experiments give new insights into the survival probability of possible terrestrial-like life forms on the present or past Martian surface and shallow subsurface environments.

Item URL in elib:https://elib.dlr.de/138060/
Document Type:Article
Title:Iron Ion Particle Radiation Resistance of Dried Colonies of Cryomyces antarcticus Embedded in Martian Regolith Analogues
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Aureli, LorenzoDepartment of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy; lorenzo.aureli (at) unitus.itUNSPECIFIED
Pacelli, ClaudiaDepartment of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy and Italian Space Agency, Via del Politecnico snc, 00133 Rome, Italy; claudia.pacelli (at) asi.itUNSPECIFIED
Cassaro, AlessiaDepartment of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy; cassaro (at) unitus.itUNSPECIFIED
Fujimori, AkiraMolecular and Cellular Radiation Biology Group, Department of Basic Medical Sciences for Radiation Damages, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan; fujimori.akira (at) qst.go.jpUNSPECIFIED
Moeller, RalfRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany and Natural Sciences Department, University of Applied Sciences Bonn-Rhein-Sieg (BRSU), Rheinbach, Germany; Ralf.Moeller (at) dlr.dehttps://orcid.org/0000-0002-2371-0676
Onofri, SilvanoDepartment of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy; onofri (at) unitus.itUNSPECIFIED
Date:24 November 2020
Journal or Publication Title:Life
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
DOI :10.3390/life10120306
Page Range:p. 306
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2075-1729
Status:Published
Keywords:cosmic rays, accelerated iron ions, Mars, fungi, life on Mars
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:26 Nov 2020 14:29
Last Modified:26 Nov 2020 14:37

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