Editing Ploidy (section)

====In bacteria and archaea====
[[Polyploid]]y is a characteristic of the bacterium ''[[Deinococcus radiodurans]]'' <ref name="Hansen-1978">{{cite journal |vauthors=Hansen MT |title=Multiplicity of genome equivalents in the radiation-resistant bacterium Micrococcus radiodurans |journal=J. Bacteriol. |volume=134 |issue=1 |pages=71–75 |year=1978 |pmid=649572 |pmc=222219 |doi= 10.1128/JB.134.1.71-75.1978}}</ref> and of the [[archaea|archaeon]] ''[[Halobacterium salinarum]]''.<ref name="Soppa-2011">{{cite journal |vauthors=Soppa J |title=Ploidy and gene conversion in Archaea |journal=Biochem. Soc. Trans. |volume=39 |issue=1 |pages=150–154 |year=2011 |pmid=21265763 |doi=10.1042/BST0390150 |s2cid=31385928 }}</ref> These two species are highly resistant to [[ionizing radiation]] and [[desiccation]], conditions that induce [[DNA]] double-strand breaks.<ref name="Zahradka-2006">{{cite journal |vauthors=Zahradka K, Slade D, Bailone A, Sommer S, Averbeck D, Petranovic M, Lindner AB, Radman M |title=Reassembly of shattered chromosomes in Deinococcus radiodurans |journal=Nature |volume=443 |issue=7111 |pages=569–573 |year=2006 |pmid=17006450 |doi=10.1038/nature05160 |bibcode=2006Natur.443..569Z |s2cid=4412830 }}</ref><ref name="Kottemann-2005">{{cite journal |vauthors=Kottemann M, Kish A, Iloanusi C, Bjork S, DiRuggiero J |title=Physiological responses of the halophilic archaeon Halobacterium sp. strain NRC1 to desiccation and gamma irradiation |journal=Extremophiles |volume=9 |issue=3 |pages=219–227 |year=2005 |pmid=15844015 |doi=10.1007/s00792-005-0437-4 |s2cid=8391234 |url=https://hal-mnhn.archives-ouvertes.fr/mnhn-02862359/file/2005_Kottemann_Kish_NRC1%20physiological%20response%20to%20desiccation%20and%20gamma%20radiation.pdf }}</ref> This resistance appears to be due to efficient [[homologous recombination]]al repair.