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Chroococcidiopsis
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The role of extremophile microbiomes in terraforming Mars - Nature nature.com Nov 17, 2025 10 facts
claimChroococcidiopsis species of cyanobacteria demonstrate endurance under Mars-like conditions, including resistance to desiccation, UV radiation, and ionizing radiation.
referenceBaqué et al. (2013) reported on the BOSS and BIOMEX space experiments on the EXPOSE-R2 mission, which tested the endurance of the desert cyanobacterium Chroococcidiopsis under simulated space vacuum, Martian atmosphere, UVC radiation, and temperature extremes.
claimLaboratory studies have demonstrated that cyanobacteria strains including Anabaena cylindrica, Leptolyngbya spp., and Chroococcidiopsis spp. can effectively photosynthesize on Martian regolith simulants under low pressure and CO₂-rich conditions.
claimWhen partially shielded by Martian regolith analogs, Chroococcidiopsis strains retained membrane integrity and photosynthetic pigment structure and resumed metabolic activity upon rehydration.
claimChroococcidiopsis are photoautotrophs isolated from desert crusts and endolithic habitats such as the Atacama Desert and the McMurdo Dry Valleys in Antarctica.
referenceM. C. Casero, C. Ascaso, A. Quesada, H. Mazur-Marzec, and J. Wierzchos studied the response of endolithic Chroococcidiopsis strains from the Atacama Desert to light radiation, published in Frontiers in Microbiology in 2021.
referenceD. Billi, E. I. Friedmann, K. G. Hofer, M. G. Caiola, and R. Ocampo-Friedmann studied ionizing-radiation resistance in the desiccation-tolerant cyanobacterium Chroococcidiopsis, published in Applied and Environmental Microbiology in 2000.
accountIn the BIOMEX mission, strains of the cyanobacteria genus Chroococcidiopsis were exposed to space vacuum and full solar radiation for over 1.5 years.
referenceThe BOSS experiment, conducted on the International Space Station, investigated the structural integrity and survival of biofilms formed by Deinococcus geothermalis and Chroococcidiopsis under Mars-like conditions.
accountThe European Space Agency (ESA) BIOMEX mission exposed dried biofilms of Chroococcidiopsis species to Mars-analog conditions outside the International Space Station for 18 months.
Life on the Edge: Bioprospecting Extremophiles for Astrobiology link.springer.com May 19, 2023 6 facts
referenceThe cyanobacterium Chroococcidiopsis showed an absence of increased genomic variants when exposed to Mars-like conditions outside the International Space Station, as reported by Napoli et al. in 2022.
measurementSome strains of Chroococcidiopsis can tolerate at least four years of air drying, up to 13 kJ m−2 of UV-C radiation, 15 kGy of X-rays, and 12 kGy of γ radiation.
referenceThe desert cyanobacterium Chroococcidiopsis exhibits different resistance capabilities to space and Martian simulations depending on whether it is in a biofilm or planktonic lifestyle, according to Baqué et al. (2013).
claimThe cyanobacterium Chroococcidiopsis exhibits resistance to ionizing radiation, as documented in a 2000 study by Billi et al.
referenceFagliarone et al. (2017) found that the avoidance of protein oxidation correlates with desiccation and radiation resistance in hot and cold desert strains of the cyanobacterium Chroococcidiopsis, published in Extremophiles 21(6):981–991.
referenceThe perchlorate-tolerant desert cyanobacterium Chroococcidiopsis can be exploited to support bacterial growth for in situ resource utilization on Mars, according to a 2021 study by Billi et al.
a special or general case in the search for extra-terrestrial life academia.edu 1 fact
referenceD. Billi, E.I. Friedmann, R.F. Helm, and M. Potts published research in 2001 regarding gene transfer to the desiccation-tolerant cyanobacterium Chroococcidiopsis in the Journal of Bacteriology.
Publications by Charles Cockell - School of Physics and Astronomy ph.ed.ac.uk 1 fact
referenceCharles Cockell co-authored the 2011 study 'Damage Escape and Repair in Dried Chroococcidiopsis spp. from Hot and Cold Deserts Exposed to Simulated Space and Martian Conditions,' published in the journal Astrobiology.