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Four closely related endornaviruses each with a low incidence in the phytopathogenic fungi Exserohilum turcicum or Bipolaris maydis

文献类型： 外文期刊

作者： Wang, Peng 1 ; Pan, Shouhui 2 ; Zheng, Yun 1 ; Pan, Xin 1 ; Gao, Zhongnan 1 ; Zhou, Xuan 1 ; Dai, Fei 2 ; Li, Zhanbiao 3 ; Deng, Qingchao 1 ; Fang, Shouguo 1 ; Wang, Haoran 1 ; Zhang, Songbai 1 ;

作者机构： 1.Yangtze Univ, Hubei Engn Res Ctr Pest Forewarning & Management, MARA Key Lab Sustainable Crop Prod Middle Reaches, Jingzhou 434025, Peoples R China

2.Guizhou Tobacco Co, Anshun Branch, Anshun 561000, Peoples R China

3.Guangxi Acad Agr Sci, Guangxi Key Lab Biol Crop Dis & Insect Pests, Nanning 530007, Peoples R China

关键词： Endornavirus; Mycovirus; Exserohilum turcicum; Bipolaris maydis; Vegetative incompatibility

期刊名称：VIRUS RESEARCH （ 影响因子：5.0； 五年影响因子：4.0 ）

ISSN： 0168-1702

年卷期： 2024 年 339 卷

页码：

收录情况： SCI

摘要： Endornaviruses are known to occur widely in plants, fungi, and oomycetes, but our understanding of their di-versity and distribution is limited. In this study, we report the discovery of four endornaviruses tentatively named Setosphaeria turcica endornavirus 1 (StEV1), Setosphaeria turcica endornavirus 2 (StEV2), Bipolaris maydis endornavirus 1 (BmEV1), and Bipolaris maydis endornavirus 2 (BmEV2). StEV1 and StEV2 infect Exserohilum turcicum, while BmEV1 and BmEV2 infect Bipolaris maydis. The four viruses encode a polyprotein with less than 40 % amino acid sequence identity to other known endornaviruses, indicating that they are novel, previously undescribed endornaviruses. However, StEV1 and BmEV1 share a sequence identity of 78 % at the full-genome level and 87 % at the polyprotein level, suggesting that they may belong to the same species. Our study also found that each of the four endornaviruses has an incidence of approximately 3.5 % to 5.5 % in E. turcicum or B. maydis. Interestingly, BmEV1 and BmEV2 were found to be unable to transmit between hosts of different vegetative incompatibility groups, which may explain their low incidence.

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