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RESILIENCE TO EXPOSURE EXPERIMENTS BY SALINISPHAERA SHABANENSIS: A NEW POLYEXTREMOPHILIC MODEL ORGANISM FOR ASTROBIOLOGY

Antunes, A. and Beblo-Vranesevic, K. and Rettberg, P. (2020) RESILIENCE TO EXPOSURE EXPERIMENTS BY SALINISPHAERA SHABANENSIS: A NEW POLYEXTREMOPHILIC MODEL ORGANISM FOR ASTROBIOLOGY. Astrobiology Australasia Meeting 2020, 9.-11. September 2020, Australia - Virtual Meeting.

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Abstract

The deep-sea anoxic brines of the Red Sea include some of the most extreme locations on Earth (1). Their unique combination of high salinity, high-pressure, anoxia, and varying levels of hydrothermal input make them a valuable source of new polyextremophilic microbes and for exploring the limits of life. They have recently been proposed as relevant terrestrial analogues and flagged for future Astrobiological-based research (2). Among these proposals, exposure experiments with representatives of new taxa was seen as one of the top priorities. Current knowledge on the capability of (facultative) anaerobic microbes to withstand extraterrestrial conditions is still very sparse and is one of the main goals of the project MEXEM (Mars EXposed Extremophiles Mixture). Here we report the results of exposure experiments performed with Salinisphaera shabanensis, a facultative anaerobic, halophilic bacterium isolated from one of the Red Sea brines (3). Our results show that this bacterium is facultative anaerobic, radiation tolerant and can survive long periods of desiccation, making it a promising new model organism for Astrobiology. Comparative studies with other species within this genus (including thermophilic, alkaliphilic, and non-extremophilic ones) should prove particularly insightful in the near future.

Item URL in elib:https://elib.dlr.de/136090/
Document Type:Conference or Workshop Item (Speech)
Title:RESILIENCE TO EXPOSURE EXPERIMENTS BY SALINISPHAERA SHABANENSIS: A NEW POLYEXTREMOPHILIC MODEL ORGANISM FOR ASTROBIOLOGY
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Antunes, A.State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau SAR, ChinaUNSPECIFIED
Beblo-Vranesevic, K.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; kristina.beblo (at) dlr.dehttps://orcid.org/0000-0002-4834-7121
Rettberg, P.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; petra.rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Date:9 September 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Astrobiology, Extremophiles, Salinisphaera shabanensis
Event Title:Astrobiology Australasia Meeting 2020
Event Location:Australia - Virtual Meeting
Event Type:international Conference
Event Dates:9.-11. September 2020
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:17 Sep 2020 11:47
Last Modified:17 Sep 2020 11:47

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