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The Responses of the Black Fungus Cryomyces Antarcticus to High Doses of Accelerated Helium Ions Radiation within Martian Regolith Simulants and Their Relevance for Mars

Pacelli, Claudia and Cassaro, Alessia and Aureli, Lorenzo and Moeller, Ralf and Fujimori, Akira and Onofri, Silvano (2020) The Responses of the Black Fungus Cryomyces Antarcticus to High Doses of Accelerated Helium Ions Radiation within Martian Regolith Simulants and Their Relevance for Mars. Life, 10 (8), p. 130. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/life10080130. ISSN 2075-1729.

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Official URL: http://dx.doi.org/10.3390/life10080130

Abstract

One of the primary current astrobiological goals is to understand the limits of microbial resistance to extraterrestrial conditions. Much attention is paid to ionizing radiation, since it can prevent the preservation and spread of life outside the Earth. The aim of this research was to study the impact of accelerated He ions (150 MeV/n, up to 1 kGy) as a component of the galactic cosmic rays on the black fungus C. antarcticus when mixed with Antarctic sandstones—the substratum of its natural habitat—and two Martian regolith simulants, which mimics two different evolutionary stages of Mars. The high dose of 1 kGy was used to assess the effect of dose accumulation in dormant cells within minerals, under long-term irradiation estimated on a geological time scale. The data obtained suggests that viable Earth-like microorganisms can be preserved in the dormant state in the near-surface scenario for approximately 322,000 and 110,000 Earth years within Martian regolith that mimic early and present Mars environmental conditions, respectively. In addition, the results of the study indicate the possibility of maintaining traces within regolith, as demonstrated by the identification of melanin pigments through UltraViolet-visible (UV-vis) spectrophotometric approach.

Item URL in elib:https://elib.dlr.de/135712/
Document Type:Article
Title:The Responses of the Black Fungus Cryomyces Antarcticus to High Doses of Accelerated Helium Ions Radiation within Martian Regolith Simulants and Their Relevance for Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Pacelli, ClaudiaItalian Space Agency, Via del Politecnico snc, 00133 Rome, Italy and Department of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, 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
Aureli, LorenzoDepartment of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy; Lorenzo.aureli (at) unitus.itUNSPECIFIED
Moeller, RalfRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; ralf.moeller (at) dlr.dehttps://orcid.org/0000-0002-2371-0676
Fujimori, AkiraMolecular and Cellular Radiation Biology Group, Department of Basic Medical Sciences for Radiation Damages, NIRS/QST, Chiba 263-8555, Japan; fujimori.akira (at) qst.go.jpUNSPECIFIED
Onofri, SilvanoDepartment of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy; onofri (at) unitus.itUNSPECIFIED
Date:31 July 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/life10080130
Page Range:p. 130
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2075-1729
Status:Published
Keywords:Galactic Cosmic Rays (GCRs); Mars environment; black fungi; survival; UV-vis spectroscopy; resistance; melanin
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:06 Aug 2020 13:16
Last Modified:13 Aug 2020 09:43

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