Survivability of the lichen Xanthoria parietina in simulated Martian environmental conditions.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
25 03 2023
25 03 2023
Historique:
received:
20
01
2023
accepted:
21
03
2023
medline:
28
3
2023
entrez:
25
3
2023
pubmed:
26
3
2023
Statut:
epublish
Résumé
Xanthoria parietina (L.) Th. Fr. is a widely spread foliose lichen showing high tolerance against UV-radiation thanks to parietin, a secondary lichen substance. We exposed samples of X. parietina under simulated Martian conditions for 30 days to explore its survivability. The lichen's vitality was monitored via chlorophyll a fluorescence that gives an indication for active light reaction of photosynthesis, performing in situ and after-treatment analyses. Raman spectroscopy and TEM were used to evaluate carotenoid preservation and possible variations in the photobiont's ultrastructure respectively. Significant differences in the photo-efficiency between UV irradiated samples and dark-kept samples were observed. Fluorescence values correlated with temperature and humidity day-night cycles. The photo-efficiency recovery showed that UV irradiation caused significant effects on the photosynthetic light reaction. Raman spectroscopy showed that the carotenoid signal from UV exposed samples decreased significantly after the exposure. TEM observations confirmed that UV exposed samples were the most affected by the treatment, showing chloroplastidial disorganization in photobionts' cells. Overall, X. parietina was able to survive the simulated Mars conditions, and for this reason it may be considered as a candidate for space long-term space exposure and evaluations of the parietin photodegradability.
Identifiants
pubmed: 36966209
doi: 10.1038/s41598-023-32008-6
pii: 10.1038/s41598-023-32008-6
pmc: PMC10039903
doi:
Substances chimiques
Chlorophyll A
YF5Q9EJC8Y
physcione
H6PT94IV61
Carotenoids
36-88-4
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
4893Informations de copyright
© 2023. The Author(s).
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