Evolutionary advantages of polyploidy in halophilic archaea.
Evolutionary advantages of polyploidy in halophilic archaea.
复制标题
DOI：
10.1042/bst20120315
复制
发表时间：
2013-02
影响因子：
3.9
通讯作者：
J. Soppa
中科院分区：
文献类型：
--
作者：
J. Soppa
一些种的盐生古生菌已被证明是多倍体的，因此这一特征可能是典型的和广泛存在于盐生古生菌中。本文讨论了盐生古生菌多倍体的9个不同可能的进化优势，包括低突变率、耐辐射/干燥、基因冗余和在地质时代和外星地点的存活率。除了一种进化优势外，所有这些进化优势都有实验迹象。其中几个优势需要基因转换，这已被证明在盐生古生菌中存在并活跃。
Several species of haloarchaea have been shown to be polyploid and thus this trait might be typical for and widespread in haloarchaea. In the present paper, nine different possible evolutionary advantages of polyploidy for haloarchaea are discussed, including low mutation rate, radiation/desiccation resistance, gene redundancy and survival over geological times and at extraterrestrial sites. Experimental indications exist for all but one of these evolutionary advantages. Several of the advantages require gene conversion, which has been shown to be present and active in haloarchaea.