TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Pacelli, Claudia
A1  - Cassaro, Alessia
A1  - Siong, Loke M.
A1  - Aureli, Lorenzo
A1  - Moeller, Ralf
A1  - Fujimori, Akira
A1  - Shuryak, Igor
A1  - Onofri, Silvano
T1  - Insights into the Survival Capabilities of Cryomyces antarcticus Hydrated Colonies after Exposure to Fe Particle Radiation
JF  - Journal of Fungi
N2  - The modern concept of the evolution of Mars assumes that life could potentially have originated on the planet Mars, possibly during the end of the late heavy bombardment, and could then be transferred to other planets. Since then, physical and chemical conditions on Mars changed and now strongly limit the presence of terrestrial-like life forms. These adverse conditions include scarcity of liquid water (although brine solutions may exist), low temperature and atmospheric pressure, and cosmic radiation. Ionizing radiation is very important among these life-constraining factors because it damages DNA and other cellular components, particularly in liquid conditions where radiation-induced reactive oxidants diffuse freely. Here, we investigated the impact of high doses (up to 2 kGy) of densely-ionizing (197.6 keV/µm), space-relevant iron ions (corresponding on the irradiation that reach the uppermost layer of the Mars subsurface) on the survival of an extremophilic terrestrial organism-Cryomyces antarcticus-in liquid medium and under atmospheric conditions, through different techniques. Results showed that it survived in a metabolically active state when subjected to high doses of Fe ions and was able to repair eventual DNA damages. It implies that some terrestrial life forms can withstand prolonged exposure to space-relevant ion radiation.
KW  - radiation
KW  - melanin
KW  - DNA
KW  - radioresistance
KW  - metabolically active cells
Y1  - 2021
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-56309
SN  - 2309-608X
SS  - 2309-608X
U6  - https://doi.org/10.3390/jof7070495
DO  - https://doi.org/10.3390/jof7070495
PM  - 34206448
VL  - 7
IS  - 7
SP  - 11
S1  - 11
PB  - MDPI
CY  - Basel
ER  -