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Life at the Limits: Capacities of Isolated and Cultured Lichen Symbionts to Resist Extreme Environmental Stresses

de Vera, J.-P. and Rettberg, Petra and Ott, S. (2008) Life at the Limits: Capacities of Isolated and Cultured Lichen Symbionts to Resist Extreme Environmental Stresses. Origins of Life and Evolution of Biospheres, 38 (5), pp. 457-468. Springer Science + Business Media B.V. 2008. DOI: 10.1007/s11084-008-9140-7. ISSN 0169-6149 (Print) 1573-0875 (Online).

Full text not available from this repository.

Abstract

Lichens are described as a symbiosis formed by a myco- and photobiont, capable of colonizing habitats where their separate symbionts would not be able to survive. Space simulation studies on the separated symbionts of the lichen Xanthoria elegans have been performed to test their capacity to resist the most extreme conditions. The isolated cultured symbiont cells were exposed to different doses of the UV spectrum, and to vacuum. Cultures of both symbionts were analysed by specific vitality tests (LIVE/DEAD-staining detected by Confocal Laser Scanning Microscopy). Growth capacity of symbiont cultures on different media was analysed after exposure to extreme environmental stresses. The data obtained support the hypothesis that the symbiotic state considerably enhances the ability of the respective symbionts to survive exposure to extreme conditions, including the conditions of space simulation. Species such as X. elegans may, therefore, be suitable for use as model organisms in exobiological studies.

Document Type:Article
Title:Life at the Limits: Capacities of Isolated and Cultured Lichen Symbionts to Resist Extreme Environmental Stresses
Authors:
AuthorsInstitution or Email of Authors
de Vera, J.-P.Institute of Botany, Heinrich-Heine-University, Universitätsstr.1, 40225 Düsseldorf, Germany e-mail: devera@uni-duesseldorf.de
Rettberg, PetraUNSPECIFIED
Ott, S.Institute of Botany, Heinrich-Heine-University, Universitätsstr.1, 40225 Düsseldorf, Germany
Date:2008
Journal or Publication Title:Origins of Life and Evolution of Biospheres
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:38
DOI:10.1007/s11084-008-9140-7
Page Range:pp. 457-468
Editors:
EditorsEmail
International Society for the Study of the Origin of Life, UNSPECIFIED
Publisher:Springer Science + Business Media B.V. 2008
ISSN:0169-6149 (Print) 1573-0875 (Online)
Status:Published
Keywords:Lichen symbiosis, Mycobiont, Photobiont, Viability, Space conditions, Culture experiments
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Strahlenbiologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kerstin Kopp
Deposited On:17 Nov 2008
Last Modified:27 Apr 2009 15:04

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