1
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Wu L, Wu Q, Cao J, Wu X, Yang M, Liu H. Molecular characterization of a novel mitovirus from the plant-pathogenic fungus Nigrospora oryzae. Arch Virol 2024; 169:181. [PMID: 39150574 DOI: 10.1007/s00705-024-06110-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Accepted: 07/06/2024] [Indexed: 08/17/2024]
Abstract
Here, we characterized a novel mitovirus from the fungus Nigrospora oryzae, which was named "Nigrospora oryzae mitovirus 3" (NoMV3). The NoMV3 genome is 2,492 nt in length with a G + C content of 33%, containing a single large open reading frame (ORF) using the fungal mitochondrial genetic code. The ORF encodes an RNA-dependent RNA polymerase (RdRp) of 775 amino acids with a molecular mass of 88.75 kDa. BLASTp analysis revealed that the RdRp of NoMV3 had 68.6%, 50.6%, and 48.6% sequence identity to those of Nigrospora oryzae mitovirus 2, Suillus luteus mitovirus 6, and Fusarium proliferatum mitovirus 3, respectively, which belong to the genus Unuamitovirus within the family Mitoviridae. Phylogenetic analysis based on amino acid sequences supported the classification of NoMV3 as a member of a new species in the genus Unuamitovirus within the family Mitoviridae.
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Affiliation(s)
- Lei Wu
- College of Forestry, Central South University of Forestry and Technology, Changsha, China
| | - Qinxiang Wu
- College of Forestry, Central South University of Forestry and Technology, Changsha, China
| | - Jiwu Cao
- College of Forestry, Central South University of Forestry and Technology, Changsha, China
| | - Xizhi Wu
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Manguo Yang
- Forestry Bureau of Shuangpai County, Yongzhou, China
| | - Hong Liu
- College of Forestry, Central South University of Forestry and Technology, Changsha, China.
- Hunan Provincial Key Laboratory for Control of Forest Diseases and Pests, Changsha, China.
- Key Laboratory of National Forestry and Grassland Administration on Control of Artiffcial Forest Diseases and Pests, Changsha, China.
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Hua H, Zhang X, Liu L, Wu X. A Novel Strain of Fusarium oxysporum Alternavirus 1 Isolated from Fusarium oxysporum f. sp. melonis Strain T-BJ17 Confers Hypovirulence and Increases the Sensitivity of Its Host Fungus to Difenoconazole and Pydiflumetofen. Viruses 2024; 16:901. [PMID: 38932193 PMCID: PMC11209391 DOI: 10.3390/v16060901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 05/30/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
In the current study, a novel strain of Fusarium oxysporum alternavirus 1 (FoAV1) was identified from the Fusarium oxysporum f. sp. melonis (FOM) strain T-BJ17 and was designated as Fusarium oxysporum alternavirus 1-FOM (FoAV1-FOM). Its genome consists of four dsRNA segments of 3515 bp (dsRNA1), 2663 bp (dsRNA2), 2368 bp (dsRNA3), and 1776 bp (dsRNA4) in length. Open reading frame 1 (ORF1) in dsRNA1 was found to encode a putative RNA-dependent RNA polymerase (RdRp), whose amino acid sequence was 99.02% identical to that of its counterpart in FoAV1; while ORF2 in dsRNA2, ORF3 in dsRNA3, and ORF4 in dsRNA4 were all found to encode hypothetical proteins. Strain T-BJ17-VF, which was verified to FoAV1-FOM-free, was obtained using single-hyphal-tip culture combined with high-temperature treatment to eliminate FoAV1-FOM from strain T-BJ17. The colony growth rate, ability to produce spores, and virulence of strain T-BJ17 were significantly lower than those of T-BJ17-VF, while the dry weight of the mycelial biomass and the sensitivity to difenoconazole and pydiflumetofen of strain T-BJ17 were greater than those of T-BJ17-VF. FoAV1-FOM was capable of 100% vertical transmission via spores. To our knowledge, this is the first time that an alternavirus has infected FOM, and this is the first report of hypovirulence and increased sensitivity to difenoconazole and pydiflumetofen induced by FoAV1-FOM infection in FOM.
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Affiliation(s)
| | | | | | - Xuehong Wu
- College of Plant Protection, China Agricultural University, Haidian District, Beijing 100193, China (X.Z.); (L.L.)
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3
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Hua H, Zhang X, Yao Y, Wu X. Complete genome sequence of a novel mitovirus identified in the phytopathogenic fungus Fusarium oxysporum f. sp. melonis strain T-SD3. Arch Virol 2024; 169:126. [PMID: 38753067 DOI: 10.1007/s00705-024-06042-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 04/22/2024] [Indexed: 06/13/2024]
Abstract
A novel mitovirus was identified in Fusarium oxysporum f. sp. melonis strain T-SD3 and designated as "Fusarium oxysporum mitovirus 3" (FoMV3). The virus was isolated from diseased muskmelon plants with the typical symptom of fusarium wilt. The complete genome of FoMV3 is 2269 nt in length with a predicted AU content of 61.40% and contains a single open reading frame (ORF) using the fungal mitochondrial genetic code. The ORF was predicted to encode a polypeptide of 679 amino acids (aa) containing a conserved RNA-dependent RNA polymerase (RdRp) domain with a molecular mass of 77.39 kDa, which contains six conserved motifs with the highly conserved GDD tripeptide in motif IV. The 5'-untranslated region (UTR) and 3'-UTR of FoMV3 were predicted to fold into stem-loop structures. BLASTp analysis revealed that the RdRp of FoMV3 shared the highest aa sequence identity (83.85%) with that of Fusarium asiaticum mitovirus 5 (FaMV5, a member of the family Mitoviridae) infecting F. asiaticum, the causal agent of wheat fusarium head blight. Phylogenetic analysis further suggested that FoMV3 is a new member of the genus Unuamitovirus within the family Mitoviridae. This is the first report of a new mitovirus associated with F. oxysporum f. sp. melonis.
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Affiliation(s)
- Huihui Hua
- College of Plant Protection, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China
| | - Xinyi Zhang
- College of Plant Protection, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China
| | - Yilin Yao
- College of Plant Protection, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China
| | - Xuehong Wu
- College of Plant Protection, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China.
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4
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Hua H, Zhang X, Xia J, Wu X. A Novel Strain of Fusarium oxysporum Virus 1 Isolated from Fusarium oxysporum f. sp. niveum Strain X-GS16 Influences Phenotypes of F. oxysporum Strain HB-TS-YT-1 hyg. J Fungi (Basel) 2024; 10:252. [PMID: 38667923 PMCID: PMC11050907 DOI: 10.3390/jof10040252] [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: 03/04/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024] Open
Abstract
A novel strain of Fusarium oxysporum virus 1 (FoV1) was identified from the Fusarium oxysporum f. sp. niveum strain X-GS16 and designated as Fusarium oxysporum virus 1-FON (FoV1-FON). The full genome of FoV1-FON is 2902 bp in length and contains two non-overlapping open reading frames (ORFs), ORF1 and ORF2, encoding a protein with an unknown function (containing a typical -1 slippery motif G_GAU_UUU at the 3'-end) and a putative RNA-dependent RNA polymerase (RdRp), respectively. BLASTx search against the National Center for the Biotechnology Information (NCBI) non-redundant database showed that FoV1-FON had the highest identity (97.46%) with FoV1. Phylogenetic analysis further confirmed that FoV1-FON clustered with FoV1 in the proposed genus Unirnavirus. FoV1-FON could vertically transmit via spores. Moreover, FoV1-FON was transmitted horizontally from the F. oxysporum f. sp. niveum strain X-GS16 to the F. oxysporum strain HB-TS-YT-1hyg. This resulted in the acquisition of the F. oxysporum strain HB-TS-YT-1hyg-V carrying FoV1-FON. No significant differences were observed in the sporulation and dry weight of mycelial biomass between HB-TS-YT-1hyg and HB-TS-YT-1hyg-V. FoV1-FON infection significantly increased the mycelial growth of HB-TS-YT-1hyg, but decreased its virulence to potato tubers and sensitivity to difenoconazole, prochloraz, and pydiflumetofen. To our knowledge, this is the first report of hypovirulence and reduced sensitivity to difenoconazole, prochloraz, and pydiflumetofen in F. oxysporum due to FoV1-FON infection.
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Affiliation(s)
| | | | | | - Xuehong Wu
- College of Plant Protection, China Agricultural University, Haidian District, Beijing 100193, China; (H.H.); (X.Z.); (J.X.)
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5
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Wang J, Ni Y, Zhao H, Liu X, Qiu R, Li S, Liu H. Complete genome sequence of a novel dsRNA virus from the phytopathogenic fungus Fusarium oxysporum. Arch Virol 2024; 169:75. [PMID: 38492088 DOI: 10.1007/s00705-024-05976-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 12/13/2023] [Indexed: 03/18/2024]
Abstract
Fusarium oxysporum is a widespread plant pathogen that causes fusarium wilt and fusarium root rot in many economically significant crops. Here, a novel dsRNA virus tentatively named "Fusarium oxysporum virus 1" (FoV1) was identified in F. oxysporum strain 3S-18. The genome of FoV1 is 2,944 nucleotides (nt) in length and contains two non-overlapping open reading frames (ORF1 and 2). The larger of these, ORF2, encodes an RNA-dependent RNA polymerase (RdRp) of 590 amino acids with a molecular mass of 67.52 kDa. ORF1 encodes a putative nucleocapsid protein consisting of 134 amino acids with a molecular mass of 34.25 kDa. The RdRp domain of FoV1 shares 60.00% to 84.24% sequence identity with non-segmented dsRNA viruses. Phylogenetic analysis further suggested that FoV1 is a new member of the proposed genus "Unirnavirus" accommodating unclassified monopartite dsRNA viruses.
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Affiliation(s)
- Jing Wang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Yunxia Ni
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Hui Zhao
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Xintao Liu
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Rui Qiu
- Institute of Tobacco, Henan Academy of Agricultural Sciences, Key Laboratory for Green Preservation & Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Shujun Li
- Institute of Tobacco, Henan Academy of Agricultural Sciences, Key Laboratory for Green Preservation & Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Zhengzhou, 450002, Henan Province, People's Republic of China.
| | - Hongyan Liu
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan Province, People's Republic of China.
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Lopez-Jimenez J, Herrera J, Alzate JF. Expanding the knowledge frontier of mitoviruses in Cannabis sativa. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2023; 116:105523. [PMID: 37940011 DOI: 10.1016/j.meegid.2023.105523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/25/2023] [Accepted: 11/04/2023] [Indexed: 11/10/2023]
Abstract
Mitoviruses were initially known for their presence in the mitochondria of fungi and were considered exclusive to these organisms. However, recent studies have shown that they are also present in a large number of plant species. Despite the potential impact that mitoviruses might have on the mitochondria of plant cells, there is a lack of information about these ancient RNA viruses, especially within the Cannabaceae family. Cannabis sativa has been in the spotlight in recent years due to the growing industrial applications of plant derivatives, such as fiber and secondary metabolites. Given the importance of Cannabis in today's agriculture, our study aimed to expand the knowledge frontier of Mitoviruses in C. sativa by increasing the number of reference genomes of CasaMV1 available in public databases and representing a larger number of crops in countries where its industrial-scale growth is legalized. To achieve this goal, we used transcriptomics to sequence the first mitoviral genomes of Colombian crops and analyzed RNA-seq datasets available in the SRA databank. Additionally, the evolutionary analysis performed using the mitovirus genomes revealed two main lineages of CasaMV1, termed CasaMV1_L1 and CasaMV1_L2. These mitoviral lineages showed strong clustering based on the geographic location of the crops and differential expression intensities.
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Affiliation(s)
- Juliana Lopez-Jimenez
- Centro Nacional de Secuenciación Genómica CNSG, Sede de Investigación Universitaria-SIU, Universidad de Antioquia, Medellín, Colombia
| | - Jorge Herrera
- Fábrica de Plantas y Semillas de Antioquia S.A.S. - FASPLAN, El Carmen de Viboral, Antioquia, Colombia
| | - Juan F Alzate
- Centro Nacional de Secuenciación Genómica CNSG, Sede de Investigación Universitaria-SIU, Universidad de Antioquia, Medellín, Colombia; Fábrica de Plantas y Semillas de Antioquia S.A.S. - FASPLAN, El Carmen de Viboral, Antioquia, Colombia; Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
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7
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Zhang Y, Guo H, Zhou S, Chen D, Xu G, Kang Z, Zheng L. A Novel Mitovirus PsMV2 Facilitates the Virulence of Wheat Stripe Rust Fungus. Viruses 2023; 15:1265. [PMID: 37376565 DOI: 10.3390/v15061265] [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: 04/02/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
Wheat stripe rust, caused by the obligate biotrophic fungus Puccinia striiformis f. sp. tritici (Pst), seriously affects wheat production. Here, we report the complete genome sequence and biological characterization of a new mitovirus from P. striiformis strain GS-1, which was designated as "Puccinia striiformis mitovirus 2" (PsMV2). Genome sequence analysis showed that PsMV2 is 2658 nt in length with an AU-rich of 52.3% and comprises a single ORF of 2348 nt encoding an RNA-dependent RNA polymerase (RdRp). Phylogenetic analysis indicated that PsMV2 is a new member of the genus Unuamitovirus within the family Mitoviridae. In addition, PsMV2 multiplied highly during Pst infection and it suppresses programmed cell death (PCD) triggered by Bax. Silencing of PsMV2 in Pst by barley stripe mosaic virus (BSMV)-mediated Host Induced Gene Silencing (HIGS) reduced fungal growth and decreased pathogenicity of Pst. These results indicate PsMV2 promotes host pathogenicity in Pst. Interestingly, PsMV2 was detected among a wide range of field isolates of Pst and may have coevolved with Pst in earlier times. Taken together, our results characterized a novel mitovirus PsMV2 in wheat stripe rust fungus, which promotes the virulence of its fungal host and wide distribution in Pst which may offer new strategies for disease control.
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Affiliation(s)
- Yanhui Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Hualong Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Siyu Zhou
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Daipeng Chen
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Gang Xu
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Li Zheng
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
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8
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Ye Y, Liu Y, Zhang Y, Wang X, Li H, Li P. Metatranscriptome-based strategy reveals the existence of novel mycoviruses in the plant pathogenic fungus Fusarium oxysporum f. sp. cubense. Front Microbiol 2023; 14:1193714. [PMID: 37275129 PMCID: PMC10234264 DOI: 10.3389/fmicb.2023.1193714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 04/28/2023] [Indexed: 06/07/2023] Open
Abstract
Fusarium oxysporum f. sp. cubense (Foc) is a devastating plant pathogen that caused a great financial loss in the banana's source area. Metatranscriptomic analysis was used to determine the diversity of mycoviruses in 246 isolates of F. oxysporum f. sp. cubense. Partial or nearly complete genomes of 20 mycoviruses were obtained by BLASTp analysis of RNA sequences using the NCBI database. These 20 viruses were grouped into five distinct lineages, namely Botourmiaviridae, Endornaviridae, Mitoviridae, Mymonaviridae, Partitiviridae, and two non-classified mycoviruses lineages. To date, there is no report of the presence of mycoviruses in this pathogen. In this study, we demonstrate the presence of mycoviruses isolated from Foc. These findings enhance our overall knowledge of viral diversity and taxonomy in Foc. Further characterization of these mycoviruses is warranted, especially in terms of exploring these novel mycoviruses for innovative biocontrol of banana Fusarium wilt disease.
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9
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Zhang X, Li S, Ma Z, Cai Q, Zhou T, Wu X. Complete genome sequence of a novel mitovirus isolated from the fungus Fusarium equiseti causing potato dry rot. Arch Virol 2022; 167:2777-2781. [PMID: 36178543 DOI: 10.1007/s00705-022-05578-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/14/2022] [Indexed: 12/14/2022]
Abstract
In this study, a novel mitovirus was isolated from the fungus Fusarium equiseti causing potato dry rot and tentatively designated as "Fusarium equiseti mitovirus 1" (FeMV1). The full-length genome sequence of FeMV1 consists of 2,459 nucleotides with a predicted A + U content of 69.5%. Using the mold mitochondrial genetic code, an open reading frame (ORF) of 725 amino acids (aa) was predicted to encode an RNA-dependent RNA polymerase (RdRp). The RdRp protein contains six conserved motifs, with the highly conserved GDD in motif IV, and the 5'-untranslated region (UTR) and 3'-UTR of FeMV1 have the potential to fold into stem-loop secondary structures and a panhandle structure, both of which are typical characteristics of members of the family Mitoviridae. Results of a BLASTp search showed that the RdRp aa sequence of FeMV1 shared the highest sequence similarity with that of Fusarium poae mitovirus 2 (FpMV2) (76.84% identity, E-value = 0.0). Phylogenetic analysis based on the complete aa sequence of RdRp further suggested that FeMV1 is a new member of the family Mitoviridae. This is the first report of the complete genome sequence analysis of a mitovirus associated with F. equiseti.
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Affiliation(s)
- Xiaofang Zhang
- College of Plant Protection, China Agricultural University, Haidian District, 100193, Beijing, People's Republic of China
| | - Siwei Li
- College of Plant Protection, China Agricultural University, Haidian District, 100193, Beijing, People's Republic of China
| | - Zhihao Ma
- College of Plant Protection, China Agricultural University, Haidian District, 100193, Beijing, People's Republic of China
| | - Qingnian Cai
- College of Plant Protection, China Agricultural University, Haidian District, 100193, Beijing, People's Republic of China
| | - Tao Zhou
- College of Plant Protection, China Agricultural University, Haidian District, 100193, Beijing, People's Republic of China
| | - Xuehong Wu
- College of Plant Protection, China Agricultural University, Haidian District, 100193, Beijing, People's Republic of China.
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Wang J, Li C, Song P, Qiu R, Song R, Li X, Ni Y, Zhao H, Liu H, Li S. Molecular and Biological Characterization of the First Mymonavirus Identified in Fusarium oxysporum. Front Microbiol 2022; 13:870204. [PMID: 35531277 PMCID: PMC9069137 DOI: 10.3389/fmicb.2022.870204] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 03/25/2022] [Indexed: 12/13/2022] Open
Abstract
We characterized a negative sense single-stranded RNA mycovirus, Fusarium oxysporum mymonavirus 1 (FoMyV1), isolated from the phytopathogenic fungus Fusarium oxysporum. The genome of FoMyV1 is 10,114 nt, including five open reading frames (ORFs1–5) that are non-overlapping and linearly arranged. The largest, ORF5, encodes a large polypeptide L containing a conserved regions corresponding to Mononegavirales RNA-dependent RNA polymerase and mRNA-capping enzyme region V; the putative functions of the remaining four ORFs are unknown. The L protein encoded by ORF5 shared a high amino acid identity of 65% with that of Hubei rhabdo-like virus 4, a mymonavirus that associated with arthropods. However, the L protein of FoMyV1 also showed amino acid similarity (27–36%) with proteins of mynonaviruses that infect the phytopathogenic fungi Sclerotinia sclerotiorum and Botrytis cineaea. Phylogenetic analysis based on L protein showed that FoMyV1 is clustered with the members of the genus Hubramonavirus in the family Mymonaviridae. Moreover, we found that FoMyV1 could successfully transfer by hyphal anastomosis to a virus-free strain. FoMyV1 reduced the vegetative growth and conidium production of its fungal host but did not alter its virulence. To the best of our knowledge, this is not only the first mymonavirus described in the species F. oxysporum, but also the first Hubramonavirus species found to infect a fungus. However, the incidence of FoMyV1 infections in the tested F. oxysporum strains was only 1%.
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Affiliation(s)
- Jing Wang
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Chengjun Li
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Pengyu Song
- College of Biological Sciences, China Agricultural University, Beijing, China
| | - Rui Qiu
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Ruifang Song
- Tobacco Company of Henan Province, Zhengzhou, China
| | - Xiaojie Li
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Yunxia Ni
- Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, Henan Key Laboratory of Crop Pest Control, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Hui Zhao
- Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, Henan Key Laboratory of Crop Pest Control, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Hongyan Liu
- Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, Henan Key Laboratory of Crop Pest Control, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, China
- *Correspondence: Hongyan Liu,
| | - Shujun Li
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, Zhengzhou, China
- Shujun Li,
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11
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Shafik K, Umer M, You H, Aboushedida H, Wang Z, Ni D, Xu W. Characterization of a Novel Mitovirus Infecting Melanconiella theae Isolated From Tea Plants. Front Microbiol 2021; 12:757556. [PMID: 34867881 PMCID: PMC8635788 DOI: 10.3389/fmicb.2021.757556] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 10/12/2021] [Indexed: 11/13/2022] Open
Abstract
A dsRNA segment was identified in the fungus Melanconiella theae isolated from tea plants. The complete dsRNA sequence, determined by random cloning together with RACE protocol, is 2,461 bp in length with an AU-rich content (62.37%) and comprises a single ORF of 2,265-nucleotides encoding an RNA-dependent RNA-polymerase (RdRp, 754 amino acids in size). The terminus sequences can fold into predicted stable stem-loop structures. A BLASTX and phylogenetic analysis revealed the dsRNA genome shows similarities with the RdRp sequences of mitoviruses, with the highest identity of 48% with those of grapevine-associated mitovirus 20 and Colletotrichum fructicola mitovirus 1. Our results reveal a novel member, tentatively named Melanconiella theae mitovirus 1 (MtMV1), belongs to the family Mitoviridae. MtMV1 is capsidless as examined by transmission electron microscope, efficiently transmitted through conidia as 100 conidium-generated colonies were analyzed, and easily eliminated by hyphal tipping method combined with green-leaf tea powder. MtMV1 has a genomic sequence obviously divergent from those of most members in the family Mitoviridae and some unique characteristics unreported in known members. This is the first report of a mycovirus infecting Melanconiella fungi to date.
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Affiliation(s)
- Karim Shafik
- Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Department of Plant Pathology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
- Key Laboratory of Horticultural Plant Biology, College of Horticulture and Forestry Sciences, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Key Lab of Plant Pathology of Hubei Province, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Muhammad Umer
- Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Horticultural Plant Biology, College of Horticulture and Forestry Sciences, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Key Lab of Plant Pathology of Hubei Province, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Huafeng You
- Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Horticultural Plant Biology, College of Horticulture and Forestry Sciences, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Key Lab of Plant Pathology of Hubei Province, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hamdy Aboushedida
- Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Department of Plant Pathology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
- Key Laboratory of Horticultural Plant Biology, College of Horticulture and Forestry Sciences, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Key Lab of Plant Pathology of Hubei Province, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Zhenhua Wang
- Technology Center of Wuhan Customs District, Wuhan, China
| | - Dejiang Ni
- Key Laboratory of Horticultural Plant Biology, College of Horticulture and Forestry Sciences, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Wenxing Xu
- Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Horticultural Plant Biology, College of Horticulture and Forestry Sciences, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Key Lab of Plant Pathology of Hubei Province, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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12
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Molecular Characterization of the First Alternavirus Identified in Fusarium oxysporum. Viruses 2021; 13:v13102026. [PMID: 34696456 PMCID: PMC8538667 DOI: 10.3390/v13102026] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/30/2021] [Accepted: 10/05/2021] [Indexed: 01/25/2023] Open
Abstract
A novel mycovirus named Fusarium oxysporum alternavirus 1(FoAV1) was identified as infecting Fusarium oxysporum strain BH19, which was isolated from a fusarium wilt diseased stem of Lilium brownii. The genome of FoAV1 contains four double-stranded RNA (dsRNA) segments (dsRNA1, dsRNA 2, dsRNA 3 and dsRNA 4, with lengths of 3.3, 2.6, 2.3 and 1.8 kbp, respectively). Additionally, dsRNA1 encodes RNA-dependent RNA polymerase (RdRp), and dsRNA2- dsRNA3- and dsRNA4-encoded hypothetical proteins (ORF2, ORF3 and ORF4), respectively. A homology BLAST search, along with multiple alignments based on RdRp, ORF2 and ORF3 sequences, identified FoAV1 as a novel member of the proposed family "Alternaviridae". Evolutionary relation analyses indicated that FoAV1 may be related to alternaviruses, thus dividing the family "Alternaviridae" members into four clades. In addition, we determined that dsRNA4 was dispensable for replication and may be a satellite-like RNA of FoAV1-and could perhaps play a role in the evolution of alternaviruses. Our results provided evidence for potential genera establishment within the proposed family "Alternaviridae". Additionally, FoAV1 exhibited biological control of Fusarium wilt. Our results also laid the foundations for the further study of mycoviruses within the family "Alternaviridae", and provide a potential agent for the biocontrol of diseases caused by F. oxysporum.
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13
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Wang J, Li C, Qiu R, Li X, Zhao J, Bai J, Chen Y, Li S. Complete genome sequence of a novel mitovirus from the phytopathogenic fungus Fusarium oxysporum. Arch Virol 2021; 166:3211-3216. [PMID: 34495411 DOI: 10.1007/s00705-021-05210-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 07/02/2021] [Indexed: 11/26/2022]
Abstract
Fusarium oxysporum is a cosmopolitan plant pathogen that causes fusarium wilt and fusarium root rot in many economically important crops. There is still limited information about mycoviruses that infect F. oxysporum. Here, a novel mitovirus tentatively named "Fusarium oxysporum mitovirus 1" (FoMV1) was identified in F. oxysporum strain B2-10. The genome of FoMV1 is 2,453 nt in length with a predicted AU content of 71.6% and contains one large open reading frame (ORF) using the fungal mitochondrial genetic code. The ORF putatively encodes an RNA-dependent RNA polymerase (RdRp) of 723 aa with a molecular mass of 84.98 kDa. The RdRp domain of FoMV1 shares 29.01% to 68.43% sequence identity with the members of the family Mitoviridae. Phylogenetic analysis further suggested that FoMV1 is a new member of a distinct species in the genus Mitovirus.
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Affiliation(s)
- Jing Wang
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Chengjun Li
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Rui Qiu
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Xiaojie Li
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Jun Zhao
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Jingke Bai
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Yuguo Chen
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China
| | - Shujun Li
- Key Laboratory for Green Preservation and Control of Tobacco Diseases and Pest in Huanghuai Growing Area, Institute of Tobacco, Henan Academy of Agricultural Sciences, No. 116, Garden road, Jingshui District, Zhengzhou, 450002, Henan Province, People's Republic of China.
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14
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Zou Q, Gao Y, Wang Q, Yang Y, Wang F, Hong N, Wang G, Wang L. The full-length genome sequence of a novel mitovirus from Botryosphaeria dothidea, the causal agent of pear ring rot disease. Arch Virol 2021; 166:2881-2885. [PMID: 34338875 DOI: 10.1007/s00705-021-05189-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 06/08/2021] [Indexed: 10/20/2022]
Abstract
Here, we describe a novel mycovirus, tentatively designated as "Botryosphaeria dothidea mitovirus 3" (BdMV3), isolated from Botryosphaeria dothidea strain FJ, which causes pear ring rot disease in Fujian Province, China. The complete genome nucleotide sequence of BdMV3 is 2538 nt in length and contains a single 2070-nt open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) of 689 amino acids (aa) using the fungal mitochondrial genetic code. BLASTp analysis revealed that the RdRp of BdMV3 shares 28.91%-69.36% sequence identity (query sequence coverage more than 90%) with those of members of the genus Mitovirus, with the highest sequence identity of 69.36% and 68.79% to the corresponding RdRp aa sequences of Rhizoctonia solani mitovirus 10 and Macrophomina phaseolina mitovirus 4, respectively. Phylogenetic analysis based on RdRp aa sequences indicated that BdMV3 is a new member of the genus Mitovirus in the family Mitoviridae.
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Affiliation(s)
- Qi Zou
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China.,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China
| | - Yunjing Gao
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China.,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China
| | - Qiong Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China.,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China
| | - Yuekun Yang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China.,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China
| | - Fang Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China
| | - Ni Hong
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China.,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China
| | - Guoping Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China.,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China
| | - Liping Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, People's Republic of China. .,Key Lab of Plant Pathology of Hubei Province, Wuhan, Hubei, 430070, People's Republic of China.
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15
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Zhao Y, Zhang Y, Wan X, She Y, Li M, Xi H, Xie J, Wen C. A Novel Ourmia-Like Mycovirus Confers Hypovirulence-Associated Traits on Fusarium oxysporum. Front Microbiol 2020; 11:569869. [PMID: 33362731 PMCID: PMC7756082 DOI: 10.3389/fmicb.2020.569869] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 11/12/2020] [Indexed: 12/20/2022] Open
Abstract
Fusarium wilt caused by Fusarium oxysporum f. sp. momordicae (FoM) is an important fungal disease that affects the production of bitter gourd. Hypovirulence-associated mycoviruses have great potential and application prospects for controlling the fungal disease. In this study, a novel ourmia-like virus, named Fusarium oxysporum ourmia-like virus 1 (FoOuLV1), was isolated from FoM strain HuN8. The viral genomic RNA is 2,712 nucleotides (nt) in length and contains an open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) using either standard or mitochondrial codes. In strain HuN8, there was also a FoOuLV1-associated RNA segment with 1,173 nt in length with no sequence homology. Phylogenetic analysis showed that FoOuLV1 is a member of the genus Magoulivirus of the family Botourmiaviridae. FoOuLV1 was found to be associated with hypovirulence in FoM. Moreover, FoOuLV1 and its hypovirulence trait can be transmitted horizontally to other FoM strains and also to other formae speciale strains of F. oxysporum. In addition, FoOuLV1 showed significant biological control effect against the bitter gourd Fusarium wilt. To our knowledge, this study reveals the first description of a hypovirulence-associated ourmia-like mycovirus, which has the potential to the biological control of Fusarium wilt.
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Affiliation(s)
- Ying Zhao
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Yuanyan Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Xinru Wan
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Yuanyuan She
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Min Li
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Huijun Xi
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Jiatao Xie
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Caiyi Wen
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
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