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Molecular characterization of a novel fusagravirus in the phytopathogenic fungus Streptobotrys caulophylli

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Abstract

Streptobotrys caulophylli is a pathogenic fungus that causes leaf and stem blight in many plants. We report a novel fusagravirus identified in S. caulophylli strain STB-2, provisionally named "Streptobotrys caulophylli fusagravirus 1" (ScFV1). The full-length genome of ScFV1 is 9270 nucleotides (nt) long and putatively possesses two large open reading frames (ORF1 and ORF2), which are separated by an intergenic region of 955 nt. A conserved domain search revealed that ORF2 (1051 aa) encodes a putative RNA-dependent RNA polymerase (RdRp), whereas ORF1 (1404 aa) encodes a protein of unknown function. Homology searches and phylogenetic analysis of the putative RdRp suggest that ScFV1 is a new member of the proposed family “Fusagraviridae”. This is the first report of a mycovirus infecting the fungus S. caulophylli.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant nos. 31861143043, 320701863).

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Authors and Affiliations

  1. State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China

    Siryuyumunsi Daniel, Assane Hamidou Abdoulaye, Yue Deng, Mingde Wu, Jing Zhang & Guoqing Li

  2. Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China

    Siryuyumunsi Daniel, Assane Hamidou Abdoulaye, Yue Deng, Mingde Wu, Jing Zhang & Guoqing Li

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  1. Siryuyumunsi Daniel
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  2. Assane Hamidou Abdoulaye
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  3. Yue Deng
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  4. Mingde Wu
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Correspondence to Mingde Wu.

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Daniel, S., Abdoulaye, A.H., Deng, Y. et al. Molecular characterization of a novel fusagravirus in the phytopathogenic fungus Streptobotrys caulophylli. Arch Virol 167, 619–623 (2022). https://doi.org/10.1007/s00705-021-05328-z

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  • DOI: https://doi.org/10.1007/s00705-021-05328-z

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