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Zhang X, Hu H, Zhao Y, Wang Y, Zhang W, You L, Wang J, Liu Y, Cheng X. Oyster Mushroom Spherical Virus Crosses the Species Barrier and Is Pathogenic to a New Host Pleurotus pulmonarius. Int J Mol Sci 2023; 24:10584. [PMID: 37445762 DOI: 10.3390/ijms241310584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
Oyster mushroom spherical virus (OMSV) is a mycovirus with a positive-sense single-stranded RNA genome that infects the edible mushroom Pleurotus ostreatus. OMSV is horizontally transferred from an infected strain to a cured strain via mycelia. The infection results in significant inhibition of mycelial growth, malformation of fruiting bodies, and yield loss in oyster mushrooms. This study successfully transferred OMSV from P. ostreatus to Pleurotus pulmonarius. However, transmission was not successful in other Pleurotus species including P. citrinopileatus, P. eryngii, P. nebrodensis, and P. salmoneostramineus. The successful OMSV infection in P. pulmonarius was further verified with Western blot analysis using a newly prepared polyclonal antiserum against the OMSV coat protein. Furthermore, OMSV infection reduced the mycelial growth rate of P. pulmonarius. The OMSV-infected strain demonstrated abnormal performance including twisted mushrooms or irregular edge of the cap as well as reduced yield of fruiting bodies in P. pulmonarius, compared to the OMSV-free strain. This study is the first report on the infection and pathogenicity of OMSV to the new host P. pulmonarius. The data from this study therefore suggest that OMSV is a potential threat to P. pulmonarius.
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Affiliation(s)
- Xiaoyan Zhang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Haijing Hu
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Yanxiang Zhao
- College of Plant Health and Medicine, Key Lab of Integrated Crop Disease and Pest Management of Shandong Province, Qingdao Agricultural University, Qingdao 266109, China
| | - Yifan Wang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Wenjing Zhang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Lunhe You
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Jianrui Wang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Yu Liu
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Xianhao Cheng
- School of Agriculture, Ludong University, Yantai 264025, China
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Zhao YJ, Shirouzu T, Chiba Y, Hosaka K, Moriyama H, Urayama SI, Hagiwara D. Identification of novel RNA mycoviruses from wild mushroom isolates in Japan. Virus Res 2023; 325:199045. [PMID: 36681193 DOI: 10.1016/j.virusres.2023.199045] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023]
Abstract
The characterization of viruses from environmental samples could aid in our understanding of their ecological significance and potential for biotechnological exploitation. While there has been much focus on pathogenic fungi or commercially cultivated mushrooms, attention to viruses from wild Basidiomycota mushrooms is lacking. Therefore, in this study, we conducted viral screening of fungal mycelia isolated from wild basidiocarps using agarose gel electrophoresis (AGE) and fragmented and primer-ligated dsRNA sequencing (FLDS). Among the 51 isolates, seven isolates were detected with virus-like bands during the initial screening with AGE, but only five isolates were detected with viruses after long-term storage. Using the FLDS method, we obtained seven viral genome sequences, including five double-stranded RNA (dsRNA) viruses belonging to Partitiviridae and Curvulaviridae, one positive-sense single-stranded RNA (ssRNA) virus belonging to Endornaviridae and one negative-sense ssRNA virus belonging to Tulasviridae (Bunyavirales). All viruses characterized in this study are novel species. These findings greatly expanded our knowledge of the diversity of RNA viruses from environmental samples.
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Affiliation(s)
- Yan-Jie Zhao
- Laboratory of Fungal Interaction and Molecular Biology (donated by IFO), Department of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Takashi Shirouzu
- Graduate School of Bioresources, Mie University, 1577 Kurima-machiya, Tsu, Mie 514-8507, Japan
| | - Yuto Chiba
- Laboratory of Fungal Interaction and Molecular Biology (donated by IFO), Department of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Kentaro Hosaka
- Department of Botany, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
| | - Hiromitsu Moriyama
- Laboratory of Molecular and Cellular Biology, Department of Applied Biological Sciences, Tokyo University of Agriculture and Technology (TUAT), 3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, Japan
| | - Syun-Ichi Urayama
- Laboratory of Fungal Interaction and Molecular Biology (donated by IFO), Department of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan.
| | - Daisuke Hagiwara
- Laboratory of Fungal Interaction and Molecular Biology (donated by IFO), Department of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan.
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Complete genome sequence of a novel mycovirus from Pleurotus citrinopileatus. Arch Virol 2023; 168:66. [PMID: 36653596 DOI: 10.1007/s00705-022-05668-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 11/21/2022] [Indexed: 01/20/2023]
Abstract
The complete genome sequence of a novel single-stranded [+ ssRNA] positive-sense (+) RNA mycovirus, designated as "Pleurotus citrinopileatus ourmiavirus 1" (PcOV1), isolated from Pleurotus citrinopileatus strain CCMJ2141, was determined. The complete genome of PcOV1 is composed of 2,535 nucleotides. It contains a single open reading frame (ORF), which encodes a protein of 657 amino acids (aa) containing conserved domains of an RNA-dependent RNA polymerase (RdRp). Phylogenetic analysis based on RdRp sequences revealed that PcOV1 is a new member of the genus Ourmiavirus in the family Botourmiaviridae. This is the first virus from P. citrinopileatus to be characterized.
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Zhang Y, Gao J, Li Y. Diversity of mycoviruses in edible fungi. Virus Genes 2022; 58:377-391. [PMID: 35668282 DOI: 10.1007/s11262-022-01908-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 04/21/2022] [Indexed: 11/25/2022]
Abstract
Mycoviruses (fungal viruses) are widespread in all major taxonomic groups of fungi. Although most mycovirus infections are latent, some mycoviruses, such as La France isometric virus, mushroom virus X, and oyster mushroom spherical virus, can cause severe diseases in edible fungi and lead to significant production losses. Recently, deep sequencing has been employed as a powerful research tool to identify new mycoviruses and to enhance our understanding of virus diversity and evolution. An increasing number of novel mycoviruses that can infect edible fungi have been reported, including double-stranded (ds) RNA, positive-sense ( +)ssRNA, and negative-sense (-)ssRNA viruses. To date, approximately 60 mycoviruses have been reported in edible fungi. In this review, we summarize the recent advances in the diversity and evolution of mycoviruses that can infect edible fungi. We also discuss mycovirus transmission, co-infections, and genetic variations, as well as the methods used to detect and control of mycoviruses in edible fungi, and provide insights for future research on mushroom viral diseases.
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Affiliation(s)
- Yanjing Zhang
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, College of Plant Protection, Jilin Agricultural University, Changchun, 130118, Jilin, China
- Laboratory of Plant Pathology, College of Plant Protection, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - Jie Gao
- Laboratory of Plant Pathology, College of Plant Protection, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - Yu Li
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, College of Plant Protection, Jilin Agricultural University, Changchun, 130118, Jilin, China.
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Sun Y, Guo M, Wang J, Bian Y, Xu Z. Curing two predominant viruses occurring in Lentinula edodes by chemotherapy and mycelial fragmentation methods. J Virol Methods 2021; 300:114370. [PMID: 34813824 DOI: 10.1016/j.jviromet.2021.114370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 06/02/2021] [Accepted: 11/18/2021] [Indexed: 10/19/2022]
Abstract
Previous research has established that Lentinula edodes mycovirus HKB (LeV-HKB) and L. edodes partitivirus 1(LePV1) are major mycoviruses identified in L.edodes germplasm. In this paper, two different methods for curing these two dsRNA mycoviruses, ribavirin treatment and mycelial fragmentation, were evaluated for the first time. Mycelial fragmentation was found to resulted in LeV-HKB- and LePV1-cured fungal strains, whereas ribavirin treatment could eliminate LeV-HKB only. Although no LePV1-cured strain was obtained via ribavirin treatment by the end of the experiment, the relative LePV1 concentration in the eighth successive subcultures was lower than that of the untreated control. The culture features of several virus-cured strains had faster mycelial growth rate and higher colony density than the infected ones. It was also suggested that LeV-HKB infection may affect the pigmentation in plate- and bag-cultivated mycelia of L. edodes strain L135.
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Affiliation(s)
- Yijia Sun
- Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Mengpei Guo
- Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jinjie Wang
- Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yinbing Bian
- Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China; Key Laboratory of Agro-Microbial Resource and Development (Ministry of Agriculture), Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Zhangyi Xu
- Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China; Key Laboratory of Agro-Microbial Resource and Development (Ministry of Agriculture), Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
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Vainio EJ, Sutela S. Mixed infection by a partitivirus and a negative-sense RNA virus related to mymonaviruses in the polypore fungus Bondarzewia berkeleyi. Virus Res 2020; 286:198079. [PMID: 32599089 DOI: 10.1016/j.virusres.2020.198079] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 11/30/2022]
Abstract
Virus communities of forest fungi remain poorly characterized. In this study, we detected two new viruses co-infecting an isolate of the polypore fungus Bondarzewia berkeleyi using high-throughput sequencing. One of them was a putative new partitivirus designated as Bondarzewia berkeleyi partitivirus 1 (BbPV1), with two linear dsRNA genome segments of 1928 and 1863 bp encoding a putative RNA-dependent RNA polymerase (RdRP) of 591 aa and a putative capsid protein of 538 aa. The other virus, designated as Bondarzewia berkeleyi negative-strand RNA virus 1 (BbNSRV1), had a non-segmented negative-sense RNA genome of 10,983 nt and was related to members of family Mymonaviridae. The BbNSRV1 genome includes six predicted open reading frames (ORFs) of 279, 425, 230, 174, 200 and 1970 aa. The longest ORF contained conserved regions corresponding to Mononegavirales RdRP and mRNA-capping enzyme region V constituting the mononegavirus Large protein. In addition, a low level of sequence identity was detected between the putative nucleocapsid protein-coding ORF2 of Lentinula edodes negative-strand RNA virus 1 and BbNSRV1. The viruses characterized in this study are the first ones described in Bondarzewia spp., and BbNSRV1 is the second mymona-like virus described in a basidiomycete host.
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Affiliation(s)
- Eeva J Vainio
- Natural Resources Institute Finland, Latokartanonkaari 9, 00790, Helsinki, Finland.
| | - Suvi Sutela
- Natural Resources Institute Finland, Latokartanonkaari 9, 00790, Helsinki, Finland
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Lin YH, Fujita M, Chiba S, Hyodo K, Andika IB, Suzuki N, Kondo H. Two novel fungal negative-strand RNA viruses related to mymonaviruses and phenuiviruses in the shiitake mushroom (Lentinula edodes). Virology 2019; 533:125-136. [PMID: 31153047 DOI: 10.1016/j.virol.2019.05.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/21/2019] [Accepted: 05/19/2019] [Indexed: 02/04/2023]
Abstract
There is still limited information on the diversity of (-)ssRNA viruses that infect fungi. Here, we have discovered two novel (-)ssRNA mycoviruses in the shiitake mushroom (Lentinula edodes). The first virus has a monopartite RNA genome and relates to that of mymonaviruses (Mononegavirales), especially to Hubei rhabdo-like virus 4 from arthropods and thus designated as Lentinula edodes negative-strand RNA virus 1. The second virus has a putative bipartite RNA genome and is related to the recently discovered bipartite or tripartite phenui-like viruses (Bunyavirales) associated with plants and ticks, and designated as Lentinula edodes negative-strand RNA virus 2 (LeNSRV2). LeNSRV2 is likely the first segmented (-)ssRNA virus known to infect fungi. Its smaller RNA segment encodes a putative nucleocapsid and a plant MP-like protein using a potential ambisense coding strategy. These findings enhance our understanding of the diversity, evolution and spread of (-)ssRNA viruses in fungi.
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Affiliation(s)
- Yu-Hsin Lin
- Institute of Plant Science and Resources (IPSR), Okayama University, Kurashiki 710-0046, Japan
| | - Miki Fujita
- Institute of Plant Science and Resources (IPSR), Okayama University, Kurashiki 710-0046, Japan
| | - Sotaro Chiba
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan; Asian Satellite Campuses Institute, Nagoya University, Nagoya 464-8601, Japan
| | - Kiwamu Hyodo
- Institute of Plant Science and Resources (IPSR), Okayama University, Kurashiki 710-0046, Japan
| | - Ida Bagus Andika
- Institute of Plant Science and Resources (IPSR), Okayama University, Kurashiki 710-0046, Japan
| | - Nobuhiro Suzuki
- Institute of Plant Science and Resources (IPSR), Okayama University, Kurashiki 710-0046, Japan
| | - Hideki Kondo
- Institute of Plant Science and Resources (IPSR), Okayama University, Kurashiki 710-0046, Japan.
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