Over-Expression of UV-Damage DNA Repair Genes and Ribonucleic Acid Persistence Contribute to the Resilience of Dried Biofilms of the Desert Cyanobacetrium Chroococcidiopsis Exposed to Mars-Like UV Flux and Long-Term Desiccation

• Published in: Frontiers in Microbiology Vol. 10; p. 2312
• Main Authors: Mosca, Claudia, Rothschild, Lynn J., Napoli, Alessandro, Ferré, Fabrizio, Pietrosanto, Marco, Fagliarone, Claudia, Baqué, Mickael, Rabbow, Elke, Rettberg, Petra, Billi, Daniela
• Format: Journal Article
• Language: English
• Published: Frontiers Media SA 11.10.2019; Frontiers Media S.A
• Subjects: anhydrobiosi; anhydrobiosis; anhydrobiosis; desert cyanobacteria; DNA repair; habitability and astrobiology; Mars UV simulation; desert cyanobacteria; DNA repair; DNA repair; Mars UV simulation; anhydrobiosis; desert cyanobacteria; habitability and astrobiology; habitability and astrobiology; Leitungsbereich PF; Mars UV simulation; Microbiology; QR1-502; Settore BIO/01 - BOTANICA GENERALE; Strahlenbiologie

The survival limits of the desert cyanobacterium Chroococcidiopsis were challenged by rewetting dried biofilms and dried biofilms exposed to 1.5 × 103 kJ/m2 of a Mars-like UV, after 7 years of air-dried storage. PCR-stop assays revealed the presence of DNA lesions in dried biofilms and an increased...