当代植物微小病毒的证据。
Evidence for contemporary plant mitoviruses.
机构信息
Department of Microbiology & Immunobiology, Harvard Medical School, Boston, MA 02115, USA.
Department of Microbiology & Immunobiology, Harvard Medical School, Boston, MA 02115, USA.
出版信息
Virology. 2018 May;518:14-24. doi: 10.1016/j.virol.2018.02.005. Epub 2018 Feb 12.
Mitoviruses have small RNA(+) genomes, replicate in mitochondria, and have been shown to infect only fungi to date. For this report, sequences that appear to represent nearly complete plant mitovirus genomes were recovered from publicly available transcriptome data. Twenty of the refined sequences, 2684-2898 nt long and derived from 10 different species of land plants, appear to encompass the complete coding regions of contemporary plant mitoviruses, which furthermore constitute a monophyletic cluster within genus Mitovirus. Complete coding sequences of several of these viruses were recovered from multiple transcriptome (but not genome) studies of the same plant species and also from multiple plant tissues. Crop plants among implicated hosts include beet and hemp. Other new results suggest that such genuine plant mitoviruses were immediate ancestors to endogenized mitovirus elements now widespread in land plant genomes. Whether these mitoviruses are wholly cryptic with regard to plant health remains to be investigated.
类线粒体病毒具有小 RNA(+)基因组，在线粒体中复制，迄今为止已被证明仅感染真菌。在本报告中，从公开的转录组数据中回收了似乎代表几乎完整的植物类线粒体病毒基因组的序列。经过改进的 20 个序列，长 2684-2898 个核苷酸，来自 10 种不同的陆地植物物种，似乎包含了当代植物类线粒体病毒的完整编码区，这些病毒进一步构成了 Mitovirus 属内的一个单系群。从同一植物物种的多个转录组(而不是基因组)研究以及多个植物组织中回收了这些病毒的几个完整编码序列。受感染的作物植物包括甜菜和大麻。其他新结果表明，这些真正的植物类线粒体病毒是现在广泛存在于陆地植物基因组中的内源性类线粒体病毒元件的直接祖先。这些类线粒体病毒是否对植物健康完全是隐性的，还有待进一步研究。
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