FN Archimer Export Format
PT J
TI Microbial Diversity and Biosignatures: An Icy Moons Perspective
BT 
AF Jebbar, Mohamed
   Hickman-Lewis, Keyron
   Cavalazzi, Barbara
   Taubner, Ruth-Sophie
   Rittmann, Simon K.-M. R.
   Antunes, Andre
AS 1:1;2:2;3:3;4:4;5:5;6:6;
FF 1:;2:;3:;4:;5:;6:;
C1 Univ. Brest, CNRS, Ifremer, Laboratoire de Microbiologie des Environnements Extrêmes, 29280, Plouzané, France
   Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Bologna, Bologna, Italy
   Centre de Biophysique Moléculaire, CNRS, Rue Charles Sadron, 45071, Orléans, France
   Department of Geology, University of Johannesburg, APK Campus, Johannesburg, South Africa
   Archaea Physiology & Biotechnology Group, Archaea Biology and Ecogenomics Division, Department of Ecogenomics and Systems Biology, Universität Wien, Wien, Austria
   State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology (MUST), Taipa, Macau SAR, China
C2 UBO, FRANCE
   UNIV BOLOGNA, ITALY
   CNRS, FRANCE
   UNIV JOHANNESBURG, SOUTH AFRICA
   UNIV VIENNA, AUSTRIA
   UNIV SCI & TECHNOL MACAU, CHINA
UM BEEP-LM2E
IN WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 8.017
TC 15
UR https://archimer.ifremer.fr/doc/00606/71771/70275.pdf
LA English
DT Article
DE ;Extremophiles;Prokaryotes;Metabolism;Diversity;Adaptation;Space explorat
AB The icy moons of the outer Solar System harbor potentially habitable environments for life, however, compared to the terrestrial biosphere, these environments are characterized by extremes in temperature, pressure, pH, and other physico-chemical conditions. Therefore, the search for life on these icy worlds is anchored on the study of terrestrial extreme environments (termed “analogue sites”), which harbor microorganisms at the frontiers of polyextremophily. These so-called extremophiles have been found in areas previously considered sterile: hot springs, hydrothermal vents, acidic or alkaline lakes, hypersaline environments, deep sea sediments, glaciers, and arid areas, amongst others. Such model systems and communities in extreme terrestrial environments may provide important information relevant to the astrobiology of icy bodies, including the composition of potential biological communities and the identification of biosignatures that they may produce. Extremophiles can use either sunlight (phototrophs) or chemical energy (chemotrophs) as energy sources, and different chemical compounds as electron donors or acceptors. Aerobic microorganisms use oxygen (O2) as a terminal electron acceptor, whereas anaerobic microorganisms may use nitrate (NO−3 ), sulfate (SO2−4 ), carbon dioxide (CO2), Fe(III), or other organic or inorganic molecules during respiration. The phylogenetic diversity of extremophiles is very high, leading to their broad dispersal across the phylogenetic tree of life together with a wide variety in metabolic diversity. Some metabolisms are specific to archaea, for example, methanogenesis, an anaerobic respiration during which methane (CH4) is produced. Also sulfur-reduction performed by some bacteria and archaea is considered as a primitive metabolism which is restricted to anoxic sulfur-rich habitats in nature. Methanogenesis and sulfur reduction are of specific interest for icy moon research as it might be one of the few known terrestrial metabolisms possible on these celestial bodies. Therefore, the adaptation of these intriguing microorganisms to extreme conditions will be highlighted within this review. 
PY 2020
PD JAN
SO Space Science Reviews
SN 0038-6308
PU Springer Science and Business Media LLC
VL 216
IS 1
UT 000514454600003
DI 10.1007/s11214-019-0620-z
ID 71771
ER

EF