Studying the resistance of cyanobacteria to ionizing radiation provides relevant information regarding astrobiology-related topics including the search for life on Mars, lithopanspermia, and biological life-support systems. Here, we report on the resistance of desert cyanobacteria of the genus Chroococcidiopsis, which were exposed (as part of the STARLIFE series of experiments) in both hydrated and dried states to ionizing radiation with different linear energy transfer values (0.2 to 200 keV/mm). Irradiation with up to 1 kGy of He or Si ions, 2 kGy of Fe ions, 5 kGy of X-rays, or 11.59 kGy of gamma rays (Co-60) did not eradicate Chroococcidiopsis populations, nor did it induce detectable damage to DNA or plasma membranes. The relevance of these results for astrobiology is briefly discussed.

Verseux, C., Baqué, M., Cifariello, R., Fagliarone, C., Raguse, M., Moeller, R., et al. (2017). Evaluation of the resistance of chroococcidiopsis spp. to sparsely and densely Ionizing irradiation. ASTROBIOLOGY, 17(2), 118-125 [10.1089/ast.2015.1450].

Evaluation of the resistance of chroococcidiopsis spp. to sparsely and densely Ionizing irradiation

Verseux, Cyprien;Baqué, Mickael;Fagliarone, Claudia;Billi, Daniela
2017

Abstract

Studying the resistance of cyanobacteria to ionizing radiation provides relevant information regarding astrobiology-related topics including the search for life on Mars, lithopanspermia, and biological life-support systems. Here, we report on the resistance of desert cyanobacteria of the genus Chroococcidiopsis, which were exposed (as part of the STARLIFE series of experiments) in both hydrated and dried states to ionizing radiation with different linear energy transfer values (0.2 to 200 keV/mm). Irradiation with up to 1 kGy of He or Si ions, 2 kGy of Fe ions, 5 kGy of X-rays, or 11.59 kGy of gamma rays (Co-60) did not eradicate Chroococcidiopsis populations, nor did it induce detectable damage to DNA or plasma membranes. The relevance of these results for astrobiology is briefly discussed.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/01
eng
Con Impact Factor ISI
Ionizing radiation; Linear energy transfer; Lithopanspermia; Cyanobacterial radioresistance; Chroococcidiopsis; Mars; Cell Membrane; Cyanobacteria; DNA Damage; DNA, Bacterial; Desiccation; Genome, Bacterial; Microbial Viability; Polymerase Chain Reaction; Radiation Tolerance; Random Amplified Polymorphic DNA Technique; X-Rays; Radiation, Ionizing
Verseux, C., Baqué, M., Cifariello, R., Fagliarone, C., Raguse, M., Moeller, R., et al. (2017). Evaluation of the resistance of chroococcidiopsis spp. to sparsely and densely Ionizing irradiation. ASTROBIOLOGY, 17(2), 118-125 [10.1089/ast.2015.1450].
Verseux, C; Baqué, M; Cifariello, R; Fagliarone, C; Raguse, M; Moeller, R; Billi, D
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/207674
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