Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors
Exploring the limits of life can help improve our understanding of how life has evolved on Earth and on other planets or moons. Exposing extremophiles to extraterrestrial conditions could highlight ways in which Earth microorganisms, but possibly also extraterrestrial life, survives in extreme envir...
Main Authors: | , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2023
|
Subjects: | |
Online Access: | https://elib.dlr.de/197449/ |
id |
ftdlr:oai:elib.dlr.de:197449 |
---|---|
record_format |
openpolar |
spelling |
ftdlr:oai:elib.dlr.de:197449 2024-05-19T07:30:08+00:00 Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors Zaccaria, Tommaso de Jonge, Marien I. Dominguez-Andres, Jorge Netea, Mihai G. Beblo-Vranesevic, Kristina Rettberg, Petra 2023-09-20 https://elib.dlr.de/197449/ unknown Zaccaria, Tommaso und de Jonge, Marien I. und Dominguez-Andres, Jorge und Netea, Mihai G. und Beblo-Vranesevic, Kristina und Rettberg, Petra (2023) Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors. EANA 2023, 2023-09-19 - 2023-09-22, Madrid, Spanien. Strahlenbiologie Konferenzbeitrag PeerReviewed 2023 ftdlr 2024-04-25T01:07:17Z Exploring the limits of life can help improve our understanding of how life has evolved on Earth and on other planets or moons. Exposing extremophiles to extraterrestrial conditions could highlight ways in which Earth microorganisms, but possibly also extraterrestrial life, survives in extreme environments. The icy moons Europa and Enceladus are the planetary targets of interest for this project. The peculiar characteristics of these moons, having a liquid subsurface ocean environment, potentially heated up by hydrothermal vents or tidal heating, makes them a great target for astrobiology investigations. This project not only investigates the characteristics of psychrophilic prokaryotic and eukaryotic organisms, from natural environments, but also organisms that have been isolated in clean rooms. Important to this project is also to avoid the contamination, during space travel, of planets or moons of astrobiological interest where there is a high probability they could support life. In this study we investigate a range of organisms including: the yeasts Rhodotorula frigidalcoholis, Rhodotorula mucilaginosa and the bacteria Pianococcus halocryophilus, Chromohalobacter sarecensis and Paenisporosarcina antarctica. With the exception of R. mucilaginosa, the other organisms have been isolated from extreme and arctic-like environments. We therefore hypothesized that these organisms would be tolerant to freezing conditions, given their isolation location, and to an extent to UV radiation, due to their pigmentation. We have been exposing the organisms to simulated space conditions, including desiccation, UV radiation, X-ray radiation and extreme cold temperatures (-80°C), in order to determine their limits of survival and potential risks for planetary protection. Ourresults have shown that surprisingly the yeasts are more tolerant to simulated space conditions than the bacteria, especially when exposed to UV-C (254 nm), polychromatic UV (200-400 nm) and X-ray radiation. When the organisms are exposed to desiccating ... Conference Object Antarc* Antarctica Arctic German Aerospace Center: elib - DLR electronic library |
institution |
Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
unknown |
topic |
Strahlenbiologie |
spellingShingle |
Strahlenbiologie Zaccaria, Tommaso de Jonge, Marien I. Dominguez-Andres, Jorge Netea, Mihai G. Beblo-Vranesevic, Kristina Rettberg, Petra Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
topic_facet |
Strahlenbiologie |
description |
Exploring the limits of life can help improve our understanding of how life has evolved on Earth and on other planets or moons. Exposing extremophiles to extraterrestrial conditions could highlight ways in which Earth microorganisms, but possibly also extraterrestrial life, survives in extreme environments. The icy moons Europa and Enceladus are the planetary targets of interest for this project. The peculiar characteristics of these moons, having a liquid subsurface ocean environment, potentially heated up by hydrothermal vents or tidal heating, makes them a great target for astrobiology investigations. This project not only investigates the characteristics of psychrophilic prokaryotic and eukaryotic organisms, from natural environments, but also organisms that have been isolated in clean rooms. Important to this project is also to avoid the contamination, during space travel, of planets or moons of astrobiological interest where there is a high probability they could support life. In this study we investigate a range of organisms including: the yeasts Rhodotorula frigidalcoholis, Rhodotorula mucilaginosa and the bacteria Pianococcus halocryophilus, Chromohalobacter sarecensis and Paenisporosarcina antarctica. With the exception of R. mucilaginosa, the other organisms have been isolated from extreme and arctic-like environments. We therefore hypothesized that these organisms would be tolerant to freezing conditions, given their isolation location, and to an extent to UV radiation, due to their pigmentation. We have been exposing the organisms to simulated space conditions, including desiccation, UV radiation, X-ray radiation and extreme cold temperatures (-80°C), in order to determine their limits of survival and potential risks for planetary protection. Ourresults have shown that surprisingly the yeasts are more tolerant to simulated space conditions than the bacteria, especially when exposed to UV-C (254 nm), polychromatic UV (200-400 nm) and X-ray radiation. When the organisms are exposed to desiccating ... |
format |
Conference Object |
author |
Zaccaria, Tommaso de Jonge, Marien I. Dominguez-Andres, Jorge Netea, Mihai G. Beblo-Vranesevic, Kristina Rettberg, Petra |
author_facet |
Zaccaria, Tommaso de Jonge, Marien I. Dominguez-Andres, Jorge Netea, Mihai G. Beblo-Vranesevic, Kristina Rettberg, Petra |
author_sort |
Zaccaria, Tommaso |
title |
Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
title_short |
Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
title_full |
Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
title_fullStr |
Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
title_full_unstemmed |
Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
title_sort |
investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors |
publishDate |
2023 |
url |
https://elib.dlr.de/197449/ |
genre |
Antarc* Antarctica Arctic |
genre_facet |
Antarc* Antarctica Arctic |
op_relation |
Zaccaria, Tommaso und de Jonge, Marien I. und Dominguez-Andres, Jorge und Netea, Mihai G. und Beblo-Vranesevic, Kristina und Rettberg, Petra (2023) Investigation of the physiological response of cold-adapted microorganisms to extreme environmental stress factors. EANA 2023, 2023-09-19 - 2023-09-22, Madrid, Spanien. |
_version_ |
1799483967737430016 |