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首页> 外文期刊>Trends in Microbiology >Secretive ciliates and putative asexuality in microbial eukaryotes
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Secretive ciliates and putative asexuality in microbial eukaryotes

机译：微生物真核生物中的分泌纤毛和假定无性

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Facultative sexuality is assumed to have occurred in the ancestor of all extant eukaryotes, but the distribution and maintenance of sex among microbial eukaryotes is still under debate. In this paper, we address the purported asexuality in colpodean ciliates as an exemplary lineage. Colpodeans are a primarily terrestrial clade thought to have arisen up to 900 MYA and contain one known derived sexual species. We conclude that the putative asexuality of this lineage is an observational artifact. We suggest that the same might hold for other microbial eukaryotes, and that many are secretively sexual as well. Theoretical work from the distantly related plants and animals suggests that both the evolutionary success of ancient asexuals and the reversal of the loss of sex are highly unlikely, further suggesting that colpodeans are secretively sexual. However, it remains to be seen to what extent sexual theories and predictions derived from macro-organismic lineages apply also to microbial eukaryotes.
机译：假定性现存性在所有现存的真核生物的祖先中都已发生，但是微生物真核生物之间性别的分布和维持仍在争论中。在本文中，我们以血统纤毛虫为例举的血统来说明无性恋。刚体是一个主要的陆地进化分支，据认为已出现至900 MYA，并包含一种已知的衍生性物种。我们得出的结论是，该血统的假定无性是观察伪像。我们建议其他微生物真核生物可能也是如此，而且许多生物也是秘密性的。来自远缘动植物的理论研究表明，古代无性恋者在进化上的成功和性丧失的逆转都不太可能，这进一步表明，后足动物是秘密性的。但是，从宏观生物谱系获得的性理论和预言在多大程度上也适用于微生物真核生物，还有待观察。

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