Evidence for contemporary plant mitoviruses.
Evidence for contemporary plant mitoviruses.
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DOI：
10.1016/j.virol.2018.02.005
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发表时间：
2018-05
期刊：
影响因子：
3.7
通讯作者：
Debat HJ
中科院分区：
文献类型：
--
作者：
Nibert ML;Vong M;Fugate KK;Debat HJ
有丝分裂病毒具有小的RNA（+）基因组，在线粒体中复制，迄今为止仅被证明感染真菌。在本报告中，似乎代表几乎完整的植物有丝分裂病毒基因组的序列是从公开可用的转录组数据中恢复的。其中20个精化序列，长2684-2898 nt，来自10种不同的陆地植物，似乎包含了现代植物有丝分裂病毒的完整编码区，进一步构成了有丝分裂病毒属的单系集群。从同一植物物种和多个植物组织的多个转录组（但不是基因组）研究中恢复了其中几种病毒的完整编码序列。受牵连的寄主包括甜菜和大麻。其他新的结果表明，这些真正的植物有丝分裂病毒是现在广泛存在于陆地植物基因组中的内源性有丝分裂病毒元件的直系祖先。这些有丝分裂病毒在植物健康方面是否完全是隐性的还有待研究。
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.
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