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首页> 外文期刊>The ISME journal emultidisciplinary journal of microbial ecology >Narnaviruses: novel players in fungal-bacterial symbioses
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Narnaviruses: novel players in fungal-bacterial symbioses

机译：肿瘤病毒：真菌细菌共生的新型球员

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Rhizopus microsporus is an early-diverging fungal species with importance in ecology, agriculture, food production, and public health. Pathogenic strains of R. microsporus harbor an intracellular bacterial symbiont, Mycetohabitans (formerly named Burkholderia). This vertically transmitted bacterial symbiont is responsible for the production of toxins crucial to the pathogenicity of Rhizopus and remarkably also for fungal reproduction. Here we show that R. microsporus can live not only in symbiosis with bacteria but also with two viral members of the genus Narnavirus. Our experiments revealed that both viruses replicated similarly in the growth conditions we tested. Viral copies were affected by the developmental stage of the fungus, the substrate, and the presence or absence of Mycetohabitans. Absolute quantification of narnaviruses in isolated asexual sporangiospores and sexual zygospores indicates their vertical transmission. By curing R. microsporus of its viral and bacterial symbionts and reinfecting bacteria to reestablish symbiosis, we demonstrate that these viruses affect fungal biology. Narnaviruses decrease asexual reproduction, but together with Mycetohabitans, are required for sexual reproductive success. This fungal-bacterial-viral system represents an outstanding model to investigate three-way microbial symbioses and their evolution.
机译：Rhizopus microporus是一种早期发散的真菌物种，具有重要的生态，农业，粮食生产和公共卫生。 R. microsporus的致病菌株港口细胞内细菌酶Symbiont，Mycetohabitans（以前叫Burkowneria）。这种垂直传播的细菌Symbiont负责生产毒素至根瘤菌的致病性至关重要，并且显着地也用于真菌繁殖。在这里，我们表明R. Microsporus不仅可以用细菌患有细菌，而且还与肿瘤属的两种病毒成员一起生活。我们的实验表明，两种病毒在我们测试的生长条件下类似地复制。病毒拷贝受到真菌，底物和乳菌哌苯脲的存在或不存在的影响。孤立的无性鞘舌胞孢子和性Zygospores中的肿瘤的绝对量化表明它们的垂直传输。通过固化其病毒和细菌共生的碱孢子孢子，并恢复细菌来重建共生，我们证明这些病毒影响真菌生物学。肿瘤病毒减少了无性繁殖，但与肌孢菌百年人一起，是性生殖成功所必需的。这种真菌细菌病毒系统代表了调查三元微生物共生及其演化的优秀模型。

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