C<scp>onan the</scp> B<scp>acterium</scp>

Huyghe, Patrick

doi:10.1002/j.2326-1951.1998.tb03393.x

Cited by 7 publications

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“…Among the extremophiles, Deinococcus radiodurans (Anderson et al. ), remains one of the most famous bacteria – nicknamed “Conan the Bacterium” (Huyghe ) and listed in The Guinness Book Of World Records – as it survives extreme ionizing radiation doses, of up to 20,000 Gy, that is two thousand times the dose lethal to human (Daly et al. , Daly ).…”

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confidence: 99%

Coccomyxa actinabiotis sp. nov. (Trebouxiophyceae, Chlorophyta), a new green microalga living in the spent fuel cooling pool of a nuclear reactor

Rivasseau

Farhi

Compagnon

et al. 2016

Journal of Phycology

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Life can thrive in extreme environments where inhospitable conditions prevail. Organisms which resist, for example, acidity, pressure, low or high temperature, have been found in harsh environments. Most of them are bacteria and archaea. The bacterium Deinococcus radiodurans is considered to be a champion among all living organisms, surviving extreme ionizing radiation levels. We have discovered a new extremophile eukaryotic organism that possesses a resistance to ionizing radiations similar to that of D. radiodurans. This microorganism, an autotrophic freshwater green microalga, lives in a peculiar environment, namely the cooling pool of a nuclear reactor containing spent nuclear fuels, where it is continuously submitted to nutritive, metallic, and radiative stress. We investigated its morphology and its ultrastructure by light, fluorescence and electron microscopy as well as its biochemical properties. Its resistance to UV and gamma radiation was assessed. When submitted to different dose rates of the order of some tens of mGy · h to several thousands of Gy · h , the microalga revealed to be able to survive intense gamma-rays irradiation, up to 2,000 times the dose lethal to human. The nuclear genome region spanning the genes for small subunit ribosomal RNA-Internal Transcribed Spacer (ITS) 1-5.8S rRNA-ITS2-28S rRNA (beginning) was sequenced (4,065 bp). The phylogenetic position of the microalga was inferred from the 18S rRNA gene. All the revealed characteristics make the alga a new species of the genus Coccomyxa in the class Trebouxiophyceae, which we name Coccomyxa actinabiotis sp. nov.

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Coccomyxa actinabiotis sp. nov. (Trebouxiophyceae, Chlorophyta), a new green microalga living in the spent fuel cooling pool of a nuclear reactor

Rivasseau

Farhi

Compagnon

et al. 2016

Journal of Phycology

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“…The bacterium Deinococcus radiodurans survives exposure to several million rads of ionizing radiation, which breaks down the toughest of glass containers. It repairs its DNA by lining up the broken parts with their homologues on other chromosomes (31). Alkaliphilic bacteria thrive at a pH of 10 in soda lakes of the African Great Rift Valley, and acidophilic bacteria thrive near a pH of 0 in Yellowstone's sulfur springs.…”

Section: Parasite Life History and Ecologymentioning

confidence: 99%

Pathogens and Parasites: Strategies and Challenges

Dimijian¹

2000

Baylor University Medical Center Proceedings

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The threat of emerging infections grows with the swelling tide of the human population and the continued disregard for the health of the environment. One of our most urgent challenges in public health is to understand the evolution and natural history of pathogens and parasites and how a sudden shift in virulence or in targeted host population may occur without warning. Viruses call for especially close watching. They are mostly genes and have mastered the art of manipulating other genes. Some are planktonic in the world's oceans, numbering 10 billion per liter of seawater; some are planktonic in our blood; some lie low inside cells; some take over a cell's replication machinery and explode the cell with new copies of themselves; and some splice their genes seamlessly into our chromosomes. The twin themes of genetic diversity and natural selection are explored in this review, with their relevance to viruses, the vertebrate immune system, virulence, and communicable disease epidemiology.

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“…Now an alga has one‐upped them. And not only that, this eukaryotic unicellular chlorophyte has matched the reigning world champion of resistance to nuclear radiation, the prokaryote Deinococcus radiodurans , also known as “Conan the Bacterium” (Huyghe ), which withstands 2,000 times the radiation dose that would kill any of us. Who would have expected a green alga could match that level of stress resistance?…”

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confidence: 99%

Life Finds a Way: Novel Algae in Reactor Cooling Ponds

McCourt

2016

Journal of Phycology

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Conan the Bacterium

Cited by 7 publications

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Coccomyxa actinabiotis sp. nov. (Trebouxiophyceae, Chlorophyta), a new green microalga living in the spent fuel cooling pool of a nuclear reactor

Coccomyxa actinabiotis sp. nov. (Trebouxiophyceae, Chlorophyta), a new green microalga living in the spent fuel cooling pool of a nuclear reactor

Pathogens and Parasites: Strategies and Challenges

Life Finds a Way: Novel Algae in Reactor Cooling Ponds

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