Cited by 56Biocrusts and Microbial EcologyPolar Research and EcologyPhotosynthetic Processes and Mechanisms

Endurance of the endolithic desert cyanobacterium Chroococcidiopsis under UVC radiation

Open access
Baqué, Mickael, Viaggiu, Emanuela, Scalzi, Giuliano, Billi, Daniela·2013·Extremophiles

Abstract

Desert cyanobacteria of the genus Chroococcidiopsis are extremely resistant to desiccation and ionizing radiation. When an endolithic strain was exposed to UVC radiation cell lysis, genome damage, photosynthetic pigment bleaching and reduced photochemical performance occurred. Nevertheless, survivors were scored after UVC doses as high as 13 kJ/m(2) and their endurance ascribed to multicellular aggregates enveloped in thick envelopes, so that attenuated UVC radiation reached the inner cells. In addition, the accumulation of carotenoids contributed to UVC resistance by providing protection against oxidative stress. Finally, in survivors repair mechanisms were responsible for the recovery of the induced damage to genome and photosynthetic apparatus.

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Crossref · 10.1007/s00792-012-0505-5

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60 of 60 references verified0 citation errors · 0 not checkable

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Authors
Baqué, M., Viaggiu, E., Scalzi, G., & Billi, D.
Affiliations
University of Rome Tor Vergata (IT)
Corresponding author
Billi, Daniela
Venue
Extremophiles
Published
2012-12-14
Volume
17
Issue
1
Pages
161-169
ISSN
  • 1431-0651 (ISSN-L)
  • 1433-4909
OpenAlex
W2058871057
Cited by
56
References
60
Citations by year
2026: 3 · 2025: 6 · 2024: 4 · 2023: 5 · 2022: 7 · 2021: 3 · 2020: 3 · 2019: 1 · 2018: 3 · 2017: 2 · 2016: 2 · 2015: 5 · 2014: 7 · 2013: 4
FWCI
5.23
Type
journal article
Language
en
Open access
Locations
  • Extremophiles (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Biocrusts and Microbial Ecology
  • Physical Sciences › Environmental Science › Ecology › Polar Research and Ecology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
Keywords
Chroococcidiopsis, endolithic cyanobacteria, UV-C radiation, radioresistance (biology), desiccation resistance, cell lysis, genomic damage, multicellular aggregates, cell envelope, carotenoids, oxidative stress, DNA repair
MeSH terms
Cyanobacteria, Carotenoids, Desert Climate, Photosynthesis, Radiation Tolerance, Ultraviolet Rays, Oxidative Stress

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