Cited by 103Lichen and fungal ecologySpace Science and Extraterrestrial LifeBiocrusts and Microbial Ecology

The Potential of the Lichen Symbiosis to Cope with the Extreme Conditions of Outer Space II: Germination Capacity of Lichen Ascospores in Response to Simulated Space Conditions

de Vera, J.-P., Horneck, G., Rettberg, P., Ott, S.·2004·Advances in Space Research

Abstract

Complementary to the already well-studied microorganisms, lichens, symbiotic organisms of the mycobiont (fungi) and the photobiont (algae), were used as "model systems" in which to examine the ecological potential to resist to extreme environments of outer space. Ascospores (sexual propagules of the mycobiont) of the lichens Fulgensia bracteata, Xanthoria elegans and Xanthoria parietina were exposed to selected space-simulating conditions (up to 16 h of space vacuum at 10(-3) Pa and UV radiation at 160 nm < or = lambda < or = 400 nm), while embedded in the lichen fruiting bodies. After exposure, the ascospores were discharged and their viability was tested as germination capacity on different culture media including those containing Mars regolith simulant. It was found that (i) the germination rate on media containing Mars regolith simulant was as high as on other mineral-containing media, (ii) if enclosed in the ascocarps, the ascospores survived the vacuum exposure, the UV-irradiation as well as the combined treatment of vacuum and UV to a high degree. In general, 50 % or more viable spores were recovered, with ascospores of X. elegans showing the highest survival. It is suggested that ascospores inside the ascocarps are well protected by the anatomical structure, the gelatinous layer and the pigments (parietin and carotene) against the space parameters tested.

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Crossref · 10.1016/j.asr.2003.10.035

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  • Lunar and Martian simulants have been primarily studied for applications other than agronomy, although they have potential use as a substrate for crop growth.

    “To date, Lunar and Martian simulants have been primarily studied for applications other than agronomy (de Vera et al., 2004;Gertsch et al., 2008;Kölbl et al., 2017;Karl et al., 2018), although they have potential use as a substrate for crop growth (Mortley et al., 2000).”

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Authors
de Vera, J.-P., Horneck, G., Rettberg, P., & Ott, S.
Affiliations
  • Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) (DE)
  • Heinrich Heine University Düsseldorf (DE)
Venue
Advances in Space Research
Publisher
Elsevier BV
Published
2004
Volume
33
Issue
8
Pages
1236-1243
ISSN
0273-1177 (ISSN-L)
OpenAlex
W1973397603
Cited by
103
References
31
Citations by year
2025: 3 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 25 · 2019: 6 · 2018: 6 · 2017: 6 · 2016: 3 · 2015: 5 · 2014: 5 · 2013: 4 · 2012: 8
FWCI
2.05
Type
journal article
Language
en
Open access
closed
Locations
  • Advances in Space Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • FAZIT Stiftung
  • Kwame Nkrumah University of Science and Technology
Topics
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Lichen and fungal ecology
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Space Science and Extraterrestrial Life
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Biocrusts and Microbial Ecology
Keywords
lichens, ascospore germination, space simulation, vacuum exposure, UV irradiation, Xanthoria elegans, Xanthoria parietina, ascomata, spore viability, space biology, extremophytes, parietin, carotene
MeSH terms
Ascomycota, Culture Media, Extraterrestrial Environment, Lichens, Radiation Tolerance, Spores, Fungal, Ultraviolet Rays, Vacuum

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