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Yang Z, Zhang B, Hu Y, Zhao L, Chen Z, Zhong J, Su J, Chen Y. Molecular characterization of a novel gammapartitivirus infecting the fungus Nigrospora oryzae. Arch Virol 2024; 169:188. [PMID: 39187668 DOI: 10.1007/s00705-024-06111-6] [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: 07/03/2024] [Accepted: 07/23/2024] [Indexed: 08/28/2024]
Abstract
Here, we identified a new mycovirus infecting the phytopathogenic fungus Nigrospora oryzae, which we have designated "Nigrospora oryzae partitivirus 2" (NoPV2). The genome of NoPV2 consists of two dsRNA segments (dsRNA 1 and dsRNA 2), measuring 1771 and 1440 bp in length, respectively. dsRNA 1 and dsRNA 2 each contain a single open reading frame (ORF) that encodes the RNA-dependent RNA polymerase (RdRp) and capsid protein (CP), respectively. A BLASTp search showed that the RdRp of NoPV2 had significant sequence similarity to the RdRps of other partitiviruses, including Nigrospora sphaerica partitivirus 1 (75.61% identity) and Magnaporthe oryzae partitivirus 1 (67.53% identity). Phylogenetic analysis revealed that NoPV2 is a new member of the genus Gammapartitivirus in the family Partitiviridae. This study provides important information for understanding the diversity of mycoviruses in N. oryzae.
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Affiliation(s)
- Zhijuan Yang
- Dali Tobacco Company of Yunnan Province, Dali City, Yunnan Province, 671000, P.R. China
| | - Baolin Zhang
- Qujing Tobacco Company of Yunnan Province, Qujing Yunnan Province, 655000, P.R. China
| | - Yang Hu
- Chuxiong Company of Yunnan Provincial Tobacco Corporation, Chuxiong, 675000, P.R. China
| | - Lianjing Zhao
- Chuxiong Company of Yunnan Provincial Tobacco Corporation, Chuxiong, 675000, P.R. China
| | - Zengmin Chen
- Chuxiong Company of Yunnan Provincial Tobacco Corporation, Chuxiong, 675000, P.R. China
| | - Jie Zhong
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Nongda Road 1, Furong District, Changsha City, Hunan Province, 410128, P.R. China
| | - Jiaen Su
- Dali Tobacco Company of Yunnan Province, Dali City, Yunnan Province, 671000, P.R. China.
| | - Yi Chen
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, Yunnan Province, 650021, P.R. China.
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Battersby JL, Stevens DA, Coutts RHA, Havlíček V, Hsu JL, Sass G, Kotta-Loizou I. The Expanding Mycovirome of Aspergilli. J Fungi (Basel) 2024; 10:585. [PMID: 39194910 DOI: 10.3390/jof10080585] [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: 06/27/2024] [Revised: 08/08/2024] [Accepted: 08/14/2024] [Indexed: 08/29/2024] Open
Abstract
Mycoviruses are viruses that infect fungi and are widespread across all major fungal taxa, exhibiting great biological diversity. Since their discovery in the 1960s, researchers have observed a myriad of fungal phenotypes altered due to mycoviral infection. In this review, we examine the nuanced world of mycoviruses in the context of the medically and agriculturally important fungal genus, Aspergillus. The advent of RNA sequencing has revealed a previous underestimate of viral prevalence in fungi, in particular linear single-stranded RNA viruses, and here we outline the diverse viral families known to date that contain mycoviruses infecting Aspergillus. Furthermore, we describe these novel mycoviruses, highlighting those with peculiar genome structures, such as a split RNA dependent RNA polymerase gene. Next, we delineate notable mycovirus-mediated phenotypes in Aspergillus, in particular reporting on observations of mycoviruses that affect their fungal host's virulence and explore how this may relate to virus-mediated decreased stress tolerance. Furthermore, mycovirus effects on microbial competition and antifungal resistance are discussed. The factors that influence the manifestation of these phenotypes, such as temperature, fungal life stage, and infection with multiple viruses, among others, are also evaluated. In addition, we attempt to elucidate the molecular mechanisms that underpin these phenotypes, examining how mycoviruses can be targets, triggers, and even suppressors of RNA silencing and how this can affect fungal gene expression and phenotypes. Finally, we highlight the potential therapeutic applications of mycoviruses and how, in an approach analogous to bacteriophage therapy, their ability to produce hypovirulence in Aspergillus might be used to attenuate invasive aspergillosis infections in humans.
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Affiliation(s)
- Josephine L Battersby
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
- Department of Clinical, Pharmaceutical and Biological Science, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - David A Stevens
- California Institute for Medical Research, San Jose, CA 95128, USA
- Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Robert H A Coutts
- Department of Clinical, Pharmaceutical and Biological Science, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Vladimír Havlíček
- Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 00 Prague, Czech Republic
- Department of Analytical Chemistry, Palacky University, 17. Listopadu 2, 779 00 Olomouc, Czech Republic
| | - Joe L Hsu
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Gabriele Sass
- California Institute for Medical Research, San Jose, CA 95128, USA
| | - Ioly Kotta-Loizou
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
- Department of Clinical, Pharmaceutical and Biological Science, University of Hertfordshire, Hatfield AL10 9AB, UK
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Kokkoris V, Banchini C, Paré L, Abdellatif L, Séguin S, Hubbard K, Findlay W, Dalpé Y, Dettman J, Corradi N, Stefani F. Rhizophagus irregularis, the model fungus in arbuscular mycorrhiza research, forms dimorphic spores. THE NEW PHYTOLOGIST 2024; 242:1771-1784. [PMID: 37434339 DOI: 10.1111/nph.19121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/10/2023] [Indexed: 07/13/2023]
Abstract
Rhizophagus irregularis is the model species for arbuscular mycorrhizal fungi (AMF) research and the most widely propagated species for commercial plant biostimulants. Using asymbiotic and symbiotic cultivation systems initiated from single spores, advanced microscopy, Sanger sequencing of the glomalin gene, and PacBio sequencing of the partial 45S rRNA gene, we show that four strains of R. irregularis produce spores of two distinct morphotypes, one corresponding to the morphotype described in the R. irregularis protologue and the other having the phenotype of R. fasciculatus. The two spore morphs are easily distinguished by spore colour, thickness of the subtending hypha, thickness of the second wall layer, lamination of the innermost layer, and the dextrinoid reaction of the two outer spore wall layers to Melzer's reagent. The glomalin gene of the two spore morphs is identical and that of the PacBio sequences of the partial SSU-ITS-LSU region (2780 bp) obtained from single spores of the R. cf fasciculatus morphotype has a median pairwise similarity of 99.8% (SD = 0.005%) to the rDNA ribotypes of R. irregularis DAOM 197198. Based on these results, we conclude that the model AMF species R. irregularis is dimorphic, which has caused taxonomic confusion in culture collections and possibly in AMF research.
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Affiliation(s)
- Vasilis Kokkoris
- Department of Biology, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
- Amsterdam Institute for Life and Environment (A-LIFE), Faculty of Science, Section Systems Ecology, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV, Amsterdam, the Netherlands
| | - Claudia Banchini
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Louis Paré
- Université Laval, Centre d'Étude de la Forêt (CEF) and Institut de Biologie Intégrative et des Systèmes (IBIS), 1030 Ave de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Lobna Abdellatif
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Sylvie Séguin
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Keith Hubbard
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Wendy Findlay
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Yolande Dalpé
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Jeremy Dettman
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
| | - Nicolas Corradi
- Department of Biology, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
| | - Franck Stefani
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A 0C6, Canada
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Hassan S, Syun-Ichi U, Shabeer S, Kiran TA, Wu CF, Moriyama H, Coutts RHA, Kotta Loizou I, Jamal A. Molecular and biological characterization of a novel partitivirus from Talaromyces pinophilus. Virus Res 2024; 343:199351. [PMID: 38453057 PMCID: PMC10982079 DOI: 10.1016/j.virusres.2024.199351] [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: 12/18/2023] [Revised: 02/13/2024] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
Talaromyces spp. have a worldwide distribution, are ecologically diverse and have been isolated from numerous different substrates. Talaromyces spp. are considered biotechnologically important due to their ability to produce a range of enzymes and pigments. Talaromyces pinophilus, belonging to genus Talaromyces and family Trichocomaceae, is known for producing several important bioactive metabolites. Here we report the isolation and characterisation of a partitivirus from T. pinophilus which we have nominated Talaromyces pinophilus partitivirus-1 (TpPV-1). TpPV-1 possesses a genome consisting of three double stranded (ds) RNA segments i.e., dsRNAs1-3, 1824 bp, 1638 bp and 1451 bp respectively, which are encapsidated in icosahedral particles 35 nm in diameter. Both dsRNA1 and dsRNA2 contain a single open reading frame (ORF) encoding respectively a 572 amino acid (aa) protein of 65 kDa and a 504 aa protein of 50 kDa. The third segment (dsRNA3) is potentially a satellite RNA. Phylogenetic analysis revealed that the TpPV-1 belongs to the family Partitiviridae in the proposed genus Zetapartitivirus. TpPV-1 infection decreases the mycelial growth rate of the host fungus and alters pigmentation as indicated by time course experiments performed on a range of different solid media comparing virus-infected and virus-free isogenic lines. This is the first report of mycovirus infection in T. pinophilus and may provide insights into understanding the effect of the mycovirus on the production of enzymes and pigments by the host fungus.
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Affiliation(s)
- Sidra Hassan
- Department of Plant and Environmental Protection, PARC Institute of Advanced Studies in Agriculture (Affiliated with Quaid-i-Azam University), National Agricultural Research Centre, Islamabad 45500, Pakistan
| | - Urayama Syun-Ichi
- 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
| | - Saba Shabeer
- Department of Bioscience, COMSATS University, Islamabad 44000, Pakistan; Crop Diseases Research Institute (CDRI), National Agricultural Research Centre, Park Road, Islamabad 45500, Pakistan
| | - Tahseen Ali Kiran
- Crop Diseases Research Institute (CDRI), National Agricultural Research Centre, Park Road, Islamabad 45500, Pakistan
| | - Chien-Fu Wu
- Laboratory of Molecular and Cellular Biology, Department of Applied Biological Sciences, Tokyo University of Agriculture & Technology, 3-5-8, Saiwaicho, Fuchu, Tokyo 184-8509, Japan
| | - Hiromitsu Moriyama
- Laboratory of Molecular and Cellular Biology, Department of Applied Biological Sciences, Tokyo University of Agriculture & Technology, 3-5-8, Saiwaicho, Fuchu, Tokyo 184-8509, Japan
| | - Robert H A Coutts
- Department of Clinical, Pharmaceutical & Biological Science, School of Life and Medical Sciences, University of Hertfordshire, AL10 9AB, Hatfield, United Kingdom
| | - Ioly Kotta Loizou
- Department of Clinical, Pharmaceutical & Biological Science, School of Life and Medical Sciences, University of Hertfordshire, AL10 9AB, Hatfield, United Kingdom; Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, SW7 2AZ, London, United Kingdom.
| | - Atif Jamal
- Crop Diseases Research Institute (CDRI), National Agricultural Research Centre, Park Road, Islamabad 45500, Pakistan.
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Zhao Y, Zhang X, Mu T, Wu X. Complete genome sequence of a novel partitivirus with a dsRNA3 segment, isolated from Fusarium commune strain CP-SX-3 causing strawberry root rot. Arch Virol 2024; 169:60. [PMID: 38430446 DOI: 10.1007/s00705-024-06004-8] [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: 11/12/2023] [Accepted: 01/24/2024] [Indexed: 03/03/2024]
Abstract
A novel partitivirus, Fusarium commune partitivirus 1 (FcoPV1), was identified in Fusarium commune strain CP-SX-3 isolated from diseased roots of strawberry with symptoms of root rot. The complete genome of FcoPV1 comprises three double-stranded RNAs (dsRNAs): dsRNA1 (1,825 nt), dsRNA2 (1,592 nt), and dsRNA3 (1,421 nt). dsRNA1 contains a single open reading frame (ORF1) encoding an RNA-dependent RNA polymerase (RdRp), and dsRNA2 contains a single ORF (ORF2) encoding a coat protein (CP). dsRNA3 is a possible satellite RNA that does not appear to encode a known protein. BLASTp analysis revealed that RdRp (86.59%) and CP (74.13%) encoded by the two ORFs (ORF1 and ORF2) had the highest sequence similarity to their counterparts in Fusarium equiseti partitivirus 1 (FePV1). Phylogenetic analysis based on the complete amino acid sequence of RdRp suggested that FcoPV1 should be considered a member of a new species in the proposed genus "Zetapartitivirus" within the family Partitiviridae. To the best of our knowledge, this is the first report of a zetapartitivirus infecting phytopathogenic F. commune.
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Affiliation(s)
- Yumeng Zhao
- Department of Plant Pathology, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China
- Liaoning Institute of Pomology, Yingkou City, Liaoning, 115009, People's Republic of China
| | - Xinyi Zhang
- Department of Plant Pathology, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China
| | - Tongyu Mu
- Department of Plant Pathology, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China
| | - Xuehong Wu
- Department of Plant Pathology, China Agricultural University, Haidian District, Beijing, 100193, People's Republic of China.
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Zhu JZ, Qiu ZL, Gao BD, Li XG, Zhong J. A novel partitivirus conferring hypovirulence by affecting vesicle transport in the fungus Colletotrichum. mBio 2024; 15:e0253023. [PMID: 38193704 PMCID: PMC10865989 DOI: 10.1128/mbio.02530-23] [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: 09/17/2023] [Accepted: 11/28/2023] [Indexed: 01/10/2024] Open
Abstract
Colletotrichum spp. are economically important phytopathogenic fungi that cause anthracnose in a variety of plant species worldwide. Hypovirulence-associated mycoviruses provide new options for the biological control of plant fungal diseases. Here, we found a novel partitivirus from Colletotrichum alienum and named it Colletotrichum alienum partitivirus 1 (CaPV1). CaPV1 contained two dsRNA segments encoding an RNA-dependent RNA polymerase and a capsid protein and was classified under the genus Gammapartitivirus of the family Partitiviridae. CaPV1 significantly decreased host virulence, mycelial growth, appressorial development, and appressorium turgor but increased conidial production with abnormal morphology. In addition, CaPV1 could be successfully transfected into other Colletotrichum species, including C. fructicola, C. spaethianum, and C. gloeosporioides, and caused hypovirulence, indicating the broad application potential of this virus. CaPV1 caused significant transcriptional rewiring of the host fungus C. alienum. Notably, some genes related to vesicle transport in the CaPV1-infected strain were downregulated, consistent with the impaired endocytosis pathway in this fungus. When the Rab gene CaRab7, which is associated with endocytosis in vesicle transport, was knocked out, the virulence of the mutants was reduced. Overall, our findings demonstrated that CaPV1 has the potential to control anthracnose caused by Colletotrichum, and the mechanism by which Colletotrichum induces hypovirulence is caused by affecting vesicle transport.IMPORTANCEColletotrichum is a kind of economically important phytopathogenic fungi that cause anthracnose disease in a variety of plant species worldwide. We found a novel mycovirus of the Gammapartitivirus genus and Partitiviridae family from the phytopathogenic fungus Colletotrichum alienum and named it CaPV1. This study revealed that CaPV1 infection significantly decreased host virulence and fitness by affecting mycelial growth, appressorial development, and appressorium turgor. In addition, CaPV1 could also infect other Colletotrichum species, including C. fructicola, C. spaethianum, and C. gloeosporioides, by viral particle transfection and resulting in hypovirulence of these Colletotrichum species. Transcriptomic analysis showed that CaPV1 caused significant transcriptional rewiring of the host fungus C. alienum, especially the genes involved in vesicle transport. Moreover, endocytosis and gene knockout assays demonstrated that the mechanism underlying CaPV1-induced hypovirulence is, at least in part, caused by affecting the vesicle transport of the host fungus. This study provided insights into the mechanisms underlying the pathogenesis of Colletotrichum species and mycovirus-fungus interactions, linking the role of mycovirus and fungus vesicle transport systems in shaping fungal pathogenicity.
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Affiliation(s)
- Jun Zi Zhu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
| | - Ze Lan Qiu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
| | - Bi Da Gao
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
| | - Xiao Gang Li
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
| | - Jie Zhong
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
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Jiang Y, Liu X, Tian X, Zhou J, Wang Q, Wang B, Yu W, Jiang Y, Hsiang T, Qi X. RNA interference of Aspergillus flavus in response to Aspergillus flavus partitivirus 1 infection. Front Microbiol 2023; 14:1252294. [PMID: 38033556 PMCID: PMC10682719 DOI: 10.3389/fmicb.2023.1252294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 10/19/2023] [Indexed: 12/02/2023] Open
Abstract
RNA interference (RNAi) is one of the important defense responses against viral infection, but its mechanism and impact remain unclear in mycovirus infections. In our study, reverse genetics and virus-derived small RNA sequencing were used to show the antiviral responses of RNAi components in Aspergillus flavus infected with Aspergillus flavus partitivirus 1 (AfPV1). qRT-PCR revealed that AfPV1 infection induced the expression of the RNAi components in A. flavus compared with noninfected A. flavus. Knock mutants of each RNAi component were generated, but the mutants did not exhibit any obvious phenotypic changes compared with the A. flavus parental strain. However, after AfPV1 inoculation, production of AfPV1 was significantly less than in the parental strain. Furthermore, sporulation was greater in each AfPV1-infected mutant compared with the AfPV1-infected parental A. flavus. We also investigated the sensitivity of virus-free and AfPV1-infected RNAi mutants and the parental strain to cell wall stress, osmotic stress, genotoxic stress, and oxidative stress. The mutants of DCLs and AGOs infected by AfPV1 displayed more changes than RDRP mutants in response to the first three stresses. Small RNA sequencing analysis suggested that AfPV1 infection reduced the number of unique reads of sRNA in A. flavus, although there were many vsiRNA derived from the AfPV1 genome. GO term and KEGG pathway analyses revealed that the functions of sRNA affected by AfPV1 infection were closely related to vacuole production. These results provide a better understanding of the functional role of RNAi in the impact of AfPV1 on the hypovirulence of A. flavus.
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Affiliation(s)
- Yinhui Jiang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Xiang Liu
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Xun Tian
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Jianhong Zhou
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Qinrong Wang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Bi Wang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Wenfeng Yu
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Yanping Jiang
- Department of Dermatology, The Affiliated Hospital, Guizhou Medical University, Guiyang, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
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Hassan S, Syun-ichi U, Shabeer S, Wu CF, Moriyama H, Coutts RHA, Kotta-Loizou I, Jamal A. Molecular and biological characterization of a partitivirus from Paecilomyces variotii. J Gen Virol 2023; 104:001925. [PMID: 38015047 PMCID: PMC10768695 DOI: 10.1099/jgv.0.001925] [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: 08/17/2023] [Accepted: 11/16/2023] [Indexed: 11/29/2023] Open
Abstract
Paeciliomyces variotii is a thermo-tolerant, ubiquitous fungus commonly found in food products, indoor environments, soil and clinical samples. It is a well-known biocontrol agent used against phytopathogenic fungi and its metabolites have many industrial applications. Rare reports of P. variotii-related human infections have been found in the medical literature. In this study, we report for the first time the infection of P. variotii isolated from a soil sample collected in a rice field with a double-stranded RNA virus, Paeciliomyces variotii partitivirus 1 (PvPV-1) in the family Partitiviridae. P. variotii harboured icosahedral virus particles 30 nm in diameter with two dsRNA segments 1758 and 1356 bp long. Both dsRNA1 and dsRNA2 have a single open reading frame encoding proteins of 63 and 40 kDa, respectively. These proteins have significant similarity to the RNA-dependent RNA polymerase and capsid protein encoded by the genomic segments of several viruses from the family Partitiviridae. Phylogenetic analysis revealed that PvPV-1 belongs to the family Partitiviridae but in an unclassified group/genus, tentatively nominated Zetapartitivirus. PvPV-1 was found to increase the growth rate of the host fungus, as indicated by time course experiments performed on a range of different media for virus-infected and virus-free isogenic lines. Further, dual-culture assays performed for both isogenic lines confirmed the antagonistic potential of P. variotii against other phytopathogenic fungi. The findings of this study assist us in understanding P. variotii as a potential biocontrol agent, together with plant-fungus-virus interactions.
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Affiliation(s)
- Sidra Hassan
- Department of Plant and Environmental Protection, PARC Institute of Advanced Studies in Agriculture (Affiliated with Quaid-i-Azam University), National Agricultural Research Centre, Islamabad, 45500, Pakistan
| | - Urayama Syun-ichi
- 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
| | - Saba Shabeer
- Department of Bioscience, COMSATS University, Islamabad, 44000, Pakistan
- Crop Diseases Research Institute (CDRI), National Agricultural Research Centre, Park Road, Islamabad, 45500, Pakistan
| | - Chien-Fu Wu
- Laboratory of Molecular and Cellular Biology, Department of Applied Biological Sciences, Tokyo University of Agriculture and Technology, 3-5-8, Saiwaicho, Fuchu, Tokyo 184-8509, Japan
| | - Hiromitsu Moriyama
- Laboratory of Molecular and Cellular Biology, Department of Applied Biological Sciences, Tokyo University of Agriculture and Technology, 3-5-8, Saiwaicho, Fuchu, Tokyo 184-8509, Japan
| | - Robert H. A. Coutts
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, AL10 9AB, UK
| | - Ioly Kotta-Loizou
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, AL10 9AB, UK
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Atif Jamal
- Crop Diseases Research Institute (CDRI), National Agricultural Research Centre, Park Road, Islamabad, 45500, Pakistan
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Wen Y, Qu J, Zhang H, Yang Y, Huang R, Deng J, Zhang J, Xiao Y, Li J, Zhang M, Wang G, Zhai L. Identification and Characterization of a Novel Hypovirus from the Phytopathogenic Fungus Botryosphaeria dothidea. Viruses 2023; 15:2059. [PMID: 37896836 PMCID: PMC10611357 DOI: 10.3390/v15102059] [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: 08/22/2023] [Revised: 10/02/2023] [Accepted: 10/03/2023] [Indexed: 10/29/2023] Open
Abstract
Many mycoviruses have been accurately and successfully identified in plant pathogenic fungus Botryosphaeria dothidea. This study discovered three mycoviruses from a B. dothidea strain SXD111 using high-throughput sequencing technology. A novel hypovirus was tentatively named Botryosphaeria dothidea hypovirus 1 (BdHV1/SXD111). The other two were known viruses, which we named Botryosphaeria dothidea polymycovirus 1 strain SXD111 (BdPmV1/SXD111) and Botryosphaeria dothidea partitivirus 1 strain SXD111 (BdPV1/SXD111). The genome of BdHV1/SXD111 is 11,128 nucleotides long, excluding the poly (A) tail. A papain-like cysteine protease (Pro), a UDP-glucose/sterol glucosyltransferase (UGT), an RNA-dependent RNA polyprotein (RdRp), and a helicase (Hel) were detected in the polyprotein of BdHV1/SXD111. Phylogenetic analysis showed that BdHV1/SXD111 was clustered with betahypovirus and separated from members of the other genera in the family Hypoviridae. The BdPmV1/SXD111 genome comprised five dsRNA segments with 2396, 2232, 1967, 1131, and 1060 bp lengths. Additionally, BdPV1/SXD111 harbored three dsRNA segments with 1823, 1623, and 557 bp lengths. Furthermore, the smallest dsRNA was a novel satellite component of BdPV1/SXD111. BdHV1/SXD111 could be transmitted through conidia and hyphae contact, whereas it likely has no apparent impact on the morphologies and virulence of the host fungus. Thus, this study is the first report of a betahypovirus isolated from the fungus B. dothidea. Importantly, our results significantly enhance the diversity of the B. dothidea viruses.
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Affiliation(s)
- Yongqi Wen
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Jinyue Qu
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Honglin Zhang
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Yi Yang
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Rui Huang
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Jili Deng
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Jiayu Zhang
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Yanping Xiao
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Jiali Li
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Meixin Zhang
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
| | - Guoping Wang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;
| | - Lifeng Zhai
- College of Life Science and Biotechnology, Yangtze Normal University, Chongqing 408100, China; (Y.W.); (J.Q.); (H.Z.); (Y.Y.); (R.H.); (J.D.); (J.Z.); (Y.X.); (J.L.); (M.Z.)
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10
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Kuroki M, Yaguchi T, Urayama SI, Hagiwara D. Experimental verification of strain-dependent relationship between mycovirus and its fungal host. iScience 2023; 26:107337. [PMID: 37520716 PMCID: PMC10372822 DOI: 10.1016/j.isci.2023.107337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/16/2023] [Accepted: 07/06/2023] [Indexed: 08/01/2023] Open
Abstract
Mycoviruses are viruses that infect fungi. Unlike mammalian infectious viruses, their life cycle does not generally have an extracellular stage, and a symbiosis-like relationship is maintained between virus and host fungi. Recently, mycoviruses have been reported to show effects on host fungi, altering biological properties such as growth rate, virulence, drug resistance, and metabolite production. In this study, we systematically elucidated the effects of viruses on host cells by comparing host phenotypes and transcriptomic responses in multiple sets of virus-infected and -eliminated Aspergillus flavus strains. The comparative study showed that mycoviruses affect several cellular activities at the molecular level in a virus- and host strain-dependent manner. The virus-swapping experiment revealed that difference with only three bases in the virus genome led to different host fungal response at the transcriptional level. Our results highlighted highly specific relationship between viruses and their host fungi.
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Affiliation(s)
- Misa Kuroki
- Faculty of Life and Environmental Science, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Takashi Yaguchi
- Medical Mycology Research Center, Chiba University, Inohana, Chou-ku, Chiba 260-8673, Japan
| | - Syun-ichi Urayama
- Faculty of Life and Environmental Science, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- Microbiology Research Center for Sustainability, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Daisuke Hagiwara
- Faculty of Life and Environmental Science, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- Microbiology Research Center for Sustainability, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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11
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Wu Z, Tian X, Liu X, Zhou J, Yu W, Qi X, Peng J, Hsiang T, Wang Q, Wu N, Jiang Y. Complete genome sequence of a novel chrysovirus infecting Aspergillus terreus. Arch Virol 2023; 168:209. [PMID: 37474811 DOI: 10.1007/s00705-023-05839-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/16/2023] [Indexed: 07/22/2023]
Abstract
A double-stranded RNA (dsRNA) mycovirus was obtained from Aspergillus terreus strain HJ3-26 and designated "Aspergillus terreus chrysovirus 1" (AtCV1). It consists of four dsRNA segments (dsRNA1-4) with lengths of 3612 bp, 3132 bp, 3153 bp, and 3144 bp, respectively. Sequence analysis showed that dsRNA1 encodes an RNA-dependent RNA polymerase (RdRp), dsRNA2 encodes a capsid protein, and both dsRNA3 and dsRNA4 encode hypothetical proteins. Phylogenetic analysis of the RdRp suggested that AtCV1 is a member of a new species of the genus Alphachrysovirus in the family Chrysoviridae. This is the first chrysovirus obtained from A. terreus.
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Affiliation(s)
- Zunqiu Wu
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
- National experimental demonstration center of basic medicine (Guizhou Medical University, 550025, Guiyang, Guizhou Province, China
| | - Xun Tian
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Xiang Liu
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Jianhong Zhou
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Wenfeng Yu
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Jian Peng
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, School of Biology and Engineering, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph), N1G 2W1, Guelph, ON, Canada
| | - Qinrong Wang
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China
| | - Ning Wu
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China.
- National experimental demonstration center of basic medicine (Guizhou Medical University, 550025, Guiyang, Guizhou Province, China.
| | - Yinhui Jiang
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University), 550004, Guiyang, Guizhou Province, China.
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12
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Pagnoni S, Oufensou S, Balmas V, Bulgari D, Gobbi E, Forgia M, Migheli Q, Turina M. A collection of Trichoderma isolates from natural environments in Sardinia reveals a complex virome that includes negative-sense fungal viruses with unprecedented genome organizations. Virus Evol 2023; 9:vead042. [PMID: 37692893 PMCID: PMC10491862 DOI: 10.1093/ve/vead042] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/20/2023] [Accepted: 06/30/2023] [Indexed: 09/12/2023] Open
Abstract
Trichoderma genus includes soil-inhabiting fungi that provide important ecosystem services in their interaction with plants and other fungi, as well as biocontrol of fungal plant diseases. A collection of Trichoderma isolates from Sardinia has been previously characterized, but here we selected 113 isolates, representatives of the collection, and characterized their viral components. We carried out high-throughput sequencing of ribosome-depleted total RNA following a bioinformatics pipeline that detects virus-derived RNA-directed RNA polymerases (RdRps) and other conserved viral protein sequences. This pipeline detected seventeen viral RdRps with two of them corresponding to viruses already detected in other regions of the world and the remaining fifteen representing isolates of new putative virus species. Surprisingly, eight of them are from new negative-sense RNA viruses, a first in the genus Trichoderma. Among them is a cogu-like virus, closely related to plant-infecting viruses. Regarding the positive-sense viruses, we report the presence of an 'ormycovirus' belonging to a recently characterized group of bisegmented single-stranded RNA viruses with uncertain phylogenetic assignment. Finally, for the first time, we report a bisegmented member of Mononegavirales which infects fungi. The proteins encoded by the second genomic RNA of this virus were used to re-evaluate several viruses in the Penicillimonavirus and Plasmopamonavirus genera, here shown to be bisegmented and encoding a conserved polypeptide that has structural conservation with the nucleocapsid domain of rhabdoviruses.
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Affiliation(s)
- Saul Pagnoni
- Department of Agricultural and Environmental Sciences—Production, Landscape, Agroenergy, University of Milan, via Celoria 2, Milan 20133, Italy
| | - Safa Oufensou
- Department of Agricultural Sciences and NRD—Desertification Research Center, University of Sassari, Viale Italia 39a, Sassari, Sardegna 07100, Italy
| | - Virgilio Balmas
- Department of Agricultural Sciences and NRD—Desertification Research Center, University of Sassari, Viale Italia 39a, Sassari, Sardegna 07100, Italy
| | - Daniela Bulgari
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, Brescia 25123, Italy
| | - Emanuela Gobbi
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, Brescia 25123, Italy
| | - Marco Forgia
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce, 73, Torino 10135, Italy
| | - Quirico Migheli
- Department of Agricultural Sciences and NRD—Desertification Research Center, University of Sassari, Viale Italia 39a, Sassari, Sardegna 07100, Italy
| | - Massimo Turina
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce, 73, Torino 10135, Italy
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13
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Taggart NT, Crabtree AM, Creagh JW, Bizarria R, Li S, de la Higuera I, Barnes JE, Shipley MA, Boyer JM, Stedman KM, Ytreberg FM, Rowley PA. Novel viruses of the family Partitiviridae discovered in Saccharomyces cerevisiae. PLoS Pathog 2023; 19:e1011418. [PMID: 37285383 PMCID: PMC10281585 DOI: 10.1371/journal.ppat.1011418] [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: 10/26/2022] [Revised: 06/20/2023] [Accepted: 05/11/2023] [Indexed: 06/09/2023] Open
Abstract
It has been 49 years since the last discovery of a new virus family in the model yeast Saccharomyces cerevisiae. A large-scale screen to determine the diversity of double-stranded RNA (dsRNA) viruses in S. cerevisiae has identified multiple novel viruses from the family Partitiviridae that have been previously shown to infect plants, fungi, protozoans, and insects. Most S. cerevisiae partitiviruses (ScPVs) are associated with strains of yeasts isolated from coffee and cacao beans. The presence of partitiviruses was confirmed by sequencing the viral dsRNAs and purifying and visualizing isometric, non-enveloped viral particles. ScPVs have a typical bipartite genome encoding an RNA-dependent RNA polymerase (RdRP) and a coat protein (CP). Phylogenetic analysis of ScPVs identified three species of ScPV, which are most closely related to viruses of the genus Cryspovirus from the mammalian pathogenic protozoan Cryptosporidium parvum. Molecular modeling of the ScPV RdRP revealed a conserved tertiary structure and catalytic site organization when compared to the RdRPs of the Picornaviridae. The ScPV CP is the smallest so far identified in the Partitiviridae and has structural homology with the CP of other partitiviruses but likely lacks a protrusion domain that is a conspicuous feature of other partitivirus particles. ScPVs were stably maintained during laboratory growth and were successfully transferred to haploid progeny after sporulation, which provides future opportunities to study partitivirus-host interactions using the powerful genetic tools available for the model organism S. cerevisiae.
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Affiliation(s)
- Nathan T Taggart
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Angela M Crabtree
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Jack W Creagh
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Rodolfo Bizarria
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
- Department of General and Applied Biology, São Paulo State University (UNESP), Rio Claro, São Paulo, Brazil
- Center for the Study of Social Insects, São Paulo State University (UNESP), Rio Claro, São Paulo, Brazil
| | - Shunji Li
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Ignacio de la Higuera
- Center for Life in Extreme Environments, Department of Biology, Portland State University, Portland, Oregon, United States of America
| | - Jonathan E Barnes
- Institute for Modeling Collaboration and Innovation, University of Idaho, Moscow, Idaho, United States of America
| | - Mason A Shipley
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Josephine M Boyer
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Kenneth M Stedman
- Center for Life in Extreme Environments, Department of Biology, Portland State University, Portland, Oregon, United States of America
| | - F Marty Ytreberg
- Institute for Modeling Collaboration and Innovation, University of Idaho, Moscow, Idaho, United States of America
- Department of Physics, University of Idaho, Moscow, Idaho, United States of America
| | - Paul A Rowley
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
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14
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Zhao C, Li S, Ma Z, Wang W, Gao L, Han C, Yang A, Wu X. Anastomosis Groups and Mycovirome of Rhizoctonia Isolates Causing Sugar Beet Root and Crown Rot and Their Sensitivity to Flutolanil, Thifluzamide, and Pencycuron. J Fungi (Basel) 2023; 9:jof9050545. [PMID: 37233256 DOI: 10.3390/jof9050545] [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: 02/21/2023] [Revised: 04/26/2023] [Accepted: 05/05/2023] [Indexed: 05/27/2023] Open
Abstract
Anastomosis groups (AGs) or subgroups of 244 Rhizoctonia isolates recovered from sugar beet roots with symptoms of root and crown rot were characterized to be AG-A, AG-K, AG-2-2IIIB, AG-2-2IV, AG-3 PT, AG-4HGI, AG-4HGII, and AG-4HGIII, with AG-4HGI (108 isolates, 44.26%) and AG-2-2IIIB (107 isolates, 43.85%) being predominate. Four unclassified mycoviruses and one hundred and one putative mycoviruses belonging to six families, namely Mitoviridae (60.00%), Narnaviridae (18.10%), Partitiviridae (7.62%), Benyviridae (4.76%), Hypoviridae (3.81%), and Botourmiaviridae (1.90%), were found to be present in these 244 Rhizoctonia isolates, most of which (88.57%) contained positive single-stranded RNA genome. The 244 Rhizoctonia isolates were all sensitive to flutolanil and thifluzamide, with average median effective concentration (EC50) value of 0.3199 ± 0.0149 μg·mL-1 and 0.1081 ± 0.0044 μg·mL-1, respectively. Among the 244 isolates, except for 20 Rhizoctonia isolates (seven isolates of AG-A and AG-K, one isolate of AG-4HGI, and 12 isolates of AG-4HGII), 117 isolates of AG-2-2IIIB, AG-2-2IV, AG-3 PT, and AG-4HGIII, 107 isolates of AG-4HGI, and six isolates of AG-4HGII were sensitive to pencycuron, with average EC50 value of 0.0339 ± 0.0012 μg·mL-1. Correlation index (ρ) of cross-resistance level between flutolanil and thifluzamide, flutolanil and pencycuron, and thifluzamide and pencycuron was 0.398, 0.315, and 0.125, respectively. This is the first detailed study on AG identification, mycovirome analysis, and sensitivity to flutolanil, thifluzamide, and pencycuron of Rhizoctonia isolates associated with sugar beet root and crown rot.
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Affiliation(s)
- Can Zhao
- College of Plant Protection, China Agricultural University, Beijing 100193, China
- College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Siwei Li
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Zhihao Ma
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Wenjun Wang
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Lihong Gao
- College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Chenggui Han
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Anpei Yang
- Institute of Plant Protection, Xinjiang Academy of Agricultural Science, Urumqi 830091, China
| | - Xuehong Wu
- College of Plant Protection, China Agricultural University, Beijing 100193, China
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15
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Sahin E, Ozbey Saridogan BG, Keskin E, Akata I. Identification and complete genome sequencing of a novel betapartitivirus naturally infecting the mycorrhizal desert truffle Terfezia claveryi. Virus Genes 2023; 59:254-259. [PMID: 36735175 DOI: 10.1007/s11262-023-01972-6] [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: 10/15/2022] [Accepted: 01/24/2023] [Indexed: 02/04/2023]
Abstract
Viruses that naturally infect fungal species and capable of establishing mycorrhizae are largely unknown. In this study, we identified and characterized a new partitivirus inhabiting the ascomycete, mycorrhizal desert truffle species Terfezia claveryi, and named it "Terfezia claveryi partitivirus 1" (TcPV1). The entire genome of TcPV1, sequenced by both high throughput sequencing of the total dsRNA extracts and by Sanger sequencing of the RLM-RACE PCR products comprised two dsRNA segments of 2404 bp and 2374 bp, respectively. Both dsRNA genome segments harbored a single open reading frame (ORF), encoding a putative RNA-dependent RNA polymerase (RdRp), and a capsid protein (CP), respectively. The BLASTp search of the RdRp and CP sequences revealed the highest sequence identities (41.92% and 24.13% identity, respectively) to those of Bipolaris maydis partitivirus 2 and Plasmopara viticola lesion associated partitivirus 5. Molecular phylogenetic analyses of the RdRp sequence showed that TcPV1 fall within a clade composed entirely of members of the genus Betapartitivirus, belonging to the family Partitiviridae. In light of this molecular evidence, TcPV1 is a new member of the genus Betapartitivirus. This is the first report of a new partitivirus hosted by the ascomycete, mycorrhizal fungus T. claveryi.
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Affiliation(s)
- Ergin Sahin
- Department of Biology, Faculty of Science, Dokuz Eylül University, Buca, 35390, İzmir, Turkey.
- Fauna and Flora Research and Application Center, Dokuz Eylül University, Buca, 35390, İzmir, Turkey.
| | | | - Emre Keskin
- Evolutionary Genetics Laboratory (eGL), Faculty of Agriculture, Department of Fisheries and Aquaculture, Ankara University, Dışkapı, 06110, Ankara, Turkey
| | - Ilgaz Akata
- Department of Biology, Faculty of Science, Ankara University, Tandogan, 06100, Ankara, Turkey
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16
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Akata I, Edis G, Keskin E, Sahin E. Diverse partitiviruses hosted by the ectomycorrhizal agaric Hebeloma mesophaeum and the natural transmission of a partitivirus between phylogenetically distant, sympatric fungi. Virology 2023; 581:63-70. [PMID: 36913914 DOI: 10.1016/j.virol.2023.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/01/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023]
Abstract
Mycorrhizal fungi host diverse mycoviruses that contribute to our understanding of their diversity and evolution. Here we report on the identification and complete genome characterization of three novel partitiviruses naturally infecting the ectomycorrhizal fungus Hebeloma mesophaeum. During NGS derived viral sequence analyses, we identified a partitivirus that is conspecific with the previously reported partitivirus (LcPV1) described from a saprotrophic fungus Leucocybe candicans. The two distinct fungal specimens inhabited the same vicinity of a campus garden. RdRp sequences encoded by the LcPV1 isolates from both host fungi was found to be identical. Bio-tracking studies revealed that viral loads of LcPV1 drop significantly in L. candicans but not in H. mesophaeum within four years period. The physical proximity of the mycelial networks of both fungal specimens implied the occurrence of a virus transmission event with unknown mechanism. Nature of this virus transmission was discussed in relation to transient interspecific mycelial contact hypothesis.
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Affiliation(s)
- Ilgaz Akata
- Ankara University Faculty of Science Department of Biology, 06100, Tandogan, Ankara, Turkey
| | - Gulce Edis
- Ankara University Science Institute, 06110, Dışkapı, Ankara, Turkey
| | - Emre Keskin
- Evolutionary Genetics Laboratory (eGL), Faculty of Agriculture Department of Fisheries and Aquaculture, Ankara University, 06110, Dışkapı, Ankara, Turkey
| | - Ergin Sahin
- Dokuz Eylül University Faculty of Science Department of Biology, 35390, Buca, İzmir, Turkey; Dokuz Eylül University Fauna and Flora Research and Application Center, 35390, Buca, İzmir, Turkey.
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17
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Ayllón MA, Vainio EJ. Mycoviruses as a part of the global virome: Diversity, evolutionary links and lifestyle. Adv Virus Res 2023; 115:1-86. [PMID: 37173063 DOI: 10.1016/bs.aivir.2023.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Knowledge of mycovirus diversity, evolution, horizontal gene transfer and shared ancestry with viruses infecting distantly related hosts, such as plants and arthropods, has increased vastly during the last few years due to advances in the high throughput sequencing methodologies. This also has enabled the discovery of novel mycoviruses with previously unknown genome types, mainly new positive and negative single-stranded RNA mycoviruses ((+) ssRNA and (-) ssRNA) and single-stranded DNA mycoviruses (ssDNA), and has increased our knowledge of double-stranded RNA mycoviruses (dsRNA), which in the past were thought to be the most common viruses infecting fungi. Fungi and oomycetes (Stramenopila) share similar lifestyles and also have similar viromes. Hypothesis about the origin and cross-kingdom transmission events of viruses have been raised and are supported by phylogenetic analysis and by the discovery of natural exchange of viruses between different hosts during virus-fungus coinfection in planta. In this review we make a compilation of the current information on the genome organization, diversity and taxonomy of mycoviruses, discussing their possible origins. Our focus is in recent findings suggesting the expansion of the host range of many viral taxa previously considered to be exclusively fungal, but we also address factors affecting virus transmissibility and coexistence in single fungal or oomycete isolates, as well as the development of synthetic mycoviruses and their use in investigating mycovirus replication cycles and pathogenicity.
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Affiliation(s)
- María A Ayllón
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)-Instituto Nacional de Investigación Agraria y Alimentaria (INIA/CSIC), Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain; Departamento Biotecnología-Biología Vegetal, E.T.S.I. Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (UPM), Madrid, Spain.
| | - Eeva J Vainio
- Forest Health and Biodiversity, Natural Resources Institute Finland (Luke), Helsinki, Finland
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18
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Jiang Y, Tian X, Liu X, Yang B, Wang N, Wang Q, Yu W, Qi X, Peng J, Hsiang T. Complete genome sequence of a novel chrysovirus infecting Talaromyces neofusisporus. Arch Virol 2022; 167:2789-2793. [PMID: 36156748 DOI: 10.1007/s00705-022-05582-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/20/2022] [Indexed: 12/14/2022]
Abstract
A double-stranded RNA (dsRNA) mycovirus was isolated from Talaromyces neofusisporus isolate HJ1-6 and named "Talaromyces neofusisporus chrysovirus 1" (TnCV1). It was found to consist of four dsRNA segments (TnCV1-1, TnCV1-2, TnCV1-3, and TnCV1-4) with lengths of 3595 bp, 3063 bp, 3054 bp, and 2876 bp, respectively. Sequence analysis showed that TnCV1-1 contains an open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) of 1136 amino acids (aa), TnCV1-2 contains an ORF encoding a hypothetical protein of 906 aa, TnCV1-3 contains an ORF encoding a putative capsid protein (CP) of 938 aa, and TnCV1-4 contains an ORF encoding a hypothetical protein of 849 aa. The 5' and 3' untranslated regions (UTRs) of TnCV1-1, TnCV1-2, TnCV1-3, and TnCV1-4 showed a high degree of sequence similarity to each other. Phylogenetic analysis based on RdRp sequences suggested that TnCV1 is a new member of the genus Alphachrysovirus in the family Chrysoviridae. This is the first chrysovirus isolated from T. neofusisporus.
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Affiliation(s)
- Yinhui Jiang
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China. .,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China.
| | - Xun Tian
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Xiang Liu
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Bi Yang
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Nianxue Wang
- Department of Biology, School of Basic Medical Sciences, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Qinrong Wang
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Wenfeng Yu
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, 550004, Guiyang, China.,Key Laboratory of Medical Molecular Biology, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Jian Peng
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, School of Biology and Engineering, Guizhou Medical University, 550004, Guiyang, Guizhou Province, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, N1G 2W1, Guelph, ON, Canada
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19
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Discovery, Genomic Sequence Characterization and Phylogenetic Analysis of Novel RNA Viruses in the Turfgrass Pathogenic Colletotrichum spp. in Japan. Viruses 2022; 14:v14112572. [PMID: 36423181 PMCID: PMC9698584 DOI: 10.3390/v14112572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 11/22/2022] Open
Abstract
Turfgrass used in various areas of the golf course has been found to present anthracnose disease, which is caused by Colletotrichum spp. To obtain potential biological agents, we identified four novel RNA viruses and obtained full-length viral genomes from turfgrass pathogenic Colletotrichum spp. in Japan. We characterized two novel dsRNA partitiviruses: Colletotrichum associated partitivirus 1 (CaPV1) and Colletotrichum associated partitivirus 2 (CaPV2), as well as two negative single-stranded (ss) RNA viruses: Colletotrichum associated negative-stranded RNA virus 1 (CaNSRV1) and Colletotrichum associated negative-stranded RNA virus 2 (CaNSRV2). Using specific RT-PCR assays, we confirmed the presence of CaPV1, CaPV2 and CaNSRV1 in dsRNAs from original and sub-isolates of Colletotrichum sp. MBCT-264, as well as CaNSRV2 in dsRNAs from original and sub-isolates of Colletotrichum sp. MBCT-288. This is the first time mycoviruses have been discovered in turfgrass pathogenic Colletotrichum spp. in Japan. CaPV1 and CaPV2 are new members of the newly proposed genus "Zetapartitivirus" and genus Alphapartitivirus, respectively, in the family Partitiviridae, according to genomic characterization and phylogenetic analysis. Negative sense ssRNA viruses CaNSRV1 and CaNSRV2, on the other hand, are new members of the family Phenuiviridae and the proposed family "Mycoaspirividae", respectively. These findings reveal previously unknown RNA virus diversity and evolution in turfgrass pathogenic Colletotrichum spp.
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20
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Chen X, Yu Z, Sun Y, Yang M, Jiang N. Molecular characterization of a novel partitivirus isolated from Rhizoctonia solani. Front Microbiol 2022; 13:978075. [PMID: 36204602 PMCID: PMC9531756 DOI: 10.3389/fmicb.2022.978075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 08/17/2022] [Indexed: 11/13/2022] Open
Abstract
Rhizoctonia solani is a widely distributed plant pathogen that can damage many crops. Here, we identified a novel mycovirus tentatively named Rhizoctonia solani partitivirus 433 (RsPV433) from an R. solani (AG-3) strain which caused tobacco target spot disease on flue-cured tobacco. RsPV433 was consisted of two dsRNA segments with lengths of 2450 and 2273 bp, which encoded an RNA-dependent RNA polymerase and a coat protein, respectively. BLASTP results of RsPV433 showed that the closest relative of RsPV433 was Sarcosphaera coronaria partitivirus (QLC36830.1), with an identity of 60.85% on the RdRp amino sequence. Phylogenetic analysis indicated that RsPV433 belonged to the Betapartitivirus genus in the Partitiviridae family. The virus transmission experiment revealed that RsPV433 can be transmitted horizontally. We further tested the biological effect of RsPV433 on R. solani strains and found that the RsPV433-infected R. solani strain grew slower than the RsPV433-free strain on the PDA medium and RsPV433 seemed to have no obvious impact on the lesion inducing ability of R. solani.
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Affiliation(s)
- Xiangru Chen
- Key Laboratory of Agricultural Microbiology, College of Agriculture, Guizhou University, Guiyang, China
| | - Zhaoyao Yu
- Key Laboratory of Agricultural Microbiology, College of Agriculture, Guizhou University, Guiyang, China
| | - Yujia Sun
- Key Laboratory of Agricultural Microbiology, College of Agriculture, Guizhou University, Guiyang, China
| | - Meipeng Yang
- Key Laboratory of Agricultural Microbiology, College of Agriculture, Guizhou University, Guiyang, China
| | - Ning Jiang
- Agronomic Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- *Correspondence: Ning Jiang
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21
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Jiang Y, Yang B, Liu X, Tian X, Wang Q, Wang B, Zhang Q, Yu W, Qi X, Jiang Y, Hsiang T. A Satellite dsRNA Attenuates the Induction of Helper Virus-Mediated Symptoms in Aspergillus flavus. Front Microbiol 2022; 13:895844. [PMID: 35711767 PMCID: PMC9195127 DOI: 10.3389/fmicb.2022.895844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022] Open
Abstract
Aspergillus flavus is an important fungal pathogen of animals and plants. Previously, we reported a novel partitivirus, Aspergillus flavus partitivirus 1 (AfPV1), infecting A. flavus. In this study, we obtained a small double-stranded (ds) RNA segment (734 bp), which is a satellite RNA of the helper virus, AfPV1. The presence of AfPV1 altered the colony morphology, decreased the number of conidiophores, created significantly larger vacuoles, and caused more sensitivity to osmotic, oxidative, and UV stresses in A. flavus, but the small RNA segment could attenuate the above symptoms caused by the helper virus AfPV1 in A. flavus. Moreover, AfPV1 infection reduced the pathogenicity of A. flavus in corn (Zea mays), honeycomb moth (Galleria mellonella), mice (Mus musculus), and the adhesion of conidia to host epithelial cells, and increased conidial death by macrophages. However, the small RNA segment could also attenuate the above symptoms caused by the helper virus AfPV1 in A. flavus, perhaps by reducing the genomic accumulation of the helper virus AfPV1 in A. flavus. We used this model to investigate transcriptional genes regulated by AfPV1 and the small RNA segment in A. flavus, and their role in generating different phenotypes. We found that the pathways of the genes regulated by AfPV1 in its host were similar to those of retroviral viruses. Therefore, some pathways may be of benefit to non-retroviral viral integration or endogenization into the genomes of its host. Moreover, some potential antiviral substances were also found in A. flavus using this system.
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Affiliation(s)
- Yinhui Jiang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Bi Yang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Xiang Liu
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Xun Tian
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Qinrong Wang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Bi Wang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Qifang Zhang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Wenfeng Yu
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, China
| | - Yanping Jiang
- Department of Dermatology, The Affiliated Hospital, Guizhou Medical University, Guiyang, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
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22
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Shimura H, Kim H, Matsuzawa A, Akino S, Masuta C. Coat protein of partitiviruses isolated from mycorrhizal fungi functions as an RNA silencing suppressor in plants and fungi. Sci Rep 2022; 12:7855. [PMID: 35551196 PMCID: PMC9098641 DOI: 10.1038/s41598-022-11403-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 04/19/2022] [Indexed: 12/11/2022] Open
Abstract
Orchid seeds depend on colonization by orchid mycorrhizal (OM) fungi for their germination; therefore, the orchids and OM fungi have long maintained a close relationship (e.g., formation of the hyphal mass structure, peloton) during their evolution. In the present study, we isolated new partitiviruses from OM fungi; partitivirus were separately found in different subcultures from the same fungi. Partitiviruses have been believed to lack an RNA silencing suppressor (RSS), which is generally associated with viral pathogenicity, because most partitiviruses isolated so far are latent in both plants and fungi. However, we found that the coat protein (CP) of our partitiviruses indeed had RSS activity, which differed among the virus isolates from OM fungi; one CP showed RSS activity in both plants and fungi, while another CP showed no activity. The family Partitiviridae include viruses isolated from plants and fungi, and it has been suggested that these viruses may occasionally be transmitted between plant and fungal hosts. Given that there are several reports showing that viruses can adapt to nonhost using strong RSS, we here discussed the idea that partitiviruses may be better able to migrate between the orchid and fungus probably through the pelotons formed in the orchid cells, if host RNA silencing is suppressed by partitivirus RSS.
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Affiliation(s)
- Hanako Shimura
- Research Faculty of Agriculture, Hokkaido University, Kita-ku, Kita 9, Nishi 9, Sapporo, 060-8589, Japan.
| | - Hangil Kim
- Research Faculty of Agriculture, Hokkaido University, Kita-ku, Kita 9, Nishi 9, Sapporo, 060-8589, Japan
| | - Akihiko Matsuzawa
- Research Faculty of Agriculture, Hokkaido University, Kita-ku, Kita 9, Nishi 9, Sapporo, 060-8589, Japan
| | - Seishi Akino
- Research Faculty of Agriculture, Hokkaido University, Kita-ku, Kita 9, Nishi 9, Sapporo, 060-8589, Japan
| | - Chikara Masuta
- Research Faculty of Agriculture, Hokkaido University, Kita-ku, Kita 9, Nishi 9, Sapporo, 060-8589, Japan.
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23
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Six Novel Mycoviruses Containing Positive Single-Stranded RNA and Double-Stranded RNA Genomes Co-Infect a Single Strain of the Rhizoctoniasolani AG-3 PT. Viruses 2022; 14:v14040813. [PMID: 35458543 PMCID: PMC9025235 DOI: 10.3390/v14040813] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/07/2022] [Accepted: 04/12/2022] [Indexed: 12/10/2022] Open
Abstract
Six novel mycoviruses that collectively represent the mycovirome of Rhizoctonia solani anastomosis group (AG)-3 PT strain ZJ-2H, which causes potato black scurf, were identified through metatranscriptome sequencing and putatively designated as Rhizoctonia solani fusarivirus 4 [RsFV4, positive single-stranded RNA (+ssRNA)], Rhizoctonia solani fusarivirus 5 (RsFV5, +ssRNA), Rhizoctonia solani mitovirus 40 (RsMV40, +ssRNA), Rhizoctonia solani partitivirus 10 [RsPV10, double-stranded RNA (dsRNA)], Rhizoctonia solani partitivirus 11 (RsPV11, dsRNA), and Rhizoctonia solani RNA virus 11 (RsRV11, dsRNA). Whole genome sequences of RsFV4, RsMV40, RsPV10, RsPV11, and RsRV11, as well as a partial genome sequence of RsFV5, were obtained. The 3'- and 5'- untranslated regions of the five mycoviruses with complete genome sequences were folded into stable stem-loop or panhandle secondary structures. RsFV4 and RsFV5 are most closely related to Rhizoctonia solani fusarivirus 1 (RsFV1), however, the first open reading frame (ORF) of RsFV4 and RsFV5 encode a hypothetical protein that differs from the first ORF of RsFV1, which encodes a helicase. We confirmed that RsPV10 and RsPV11 assemble into the spherical virus particles (approximately 30 nm in diameter) that were extracted from strain ZJ-2H. This is the first report that +ssRNA and dsRNA viruses co-infect a single strain of R. solani AG-3 PT.
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24
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Telengech P, Shahi S, Kondo H, Suzuki N. A novel deltapartitivirus from red clover. Arch Virol 2022; 167:1201-1204. [PMID: 35246731 DOI: 10.1007/s00705-022-05372-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 11/28/2022]
Abstract
The family Partitiviridae has five genera, among which is the genus Deltapartitivirus. We report here the complete genome sequence of a deltapartitivirus from red clover, termed "red clover cryptic virus 3" (RCCV3). RCCV3 has a bisegmented double-stranded (ds) RNA genome. dsRNA1 and dsRNA2 are 1580 and 1589 nucleotides (nt) in length and are predicted to encode an RNA-directed RNA polymerase (RdRP) and a capsid protein (CP), respectively. The RCCV3 RdRP shares the highest sequence identity with the RdRP of a previously reported deltapartitivirus, Medicago sativa deltapartitivirus 1 (MsDPV1) (76.5%), while the RCCV3 CP shows 50% sequence identity to the CP of MsDPV1. RdRP- and CP-based phylogenetic trees place RCCV3 into a clade of deltapartitiviruses. The sequence and phylogenetic analyses clearly indicate that RCCV3 represents a new species in the genus Deltapartitivirus. RCCV3 was detectable in all three tested cultivars of red clover.
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Affiliation(s)
- Paul Telengech
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Sabitree Shahi
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Hideki Kondo
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Nobuhiro Suzuki
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan.
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25
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Characterization of a Novel Mycovirus from the Phytopathogenic Fungus Botryosphaeria dothidea. Viruses 2022; 14:v14020331. [PMID: 35215923 PMCID: PMC8879742 DOI: 10.3390/v14020331] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 12/10/2022] Open
Abstract
Botryosphaeria dothidea is, globally, one of the most economically important phytopathogenic fungi worldwide, causing the canker and dieback of fruit trees. An increasing number of viruses infecting B. dothidea have lately been reported, several of which could confer hypovirulence. In this study, isolated from strain ZM170285-1 of B. dothidea, a novel double-stranded RNA (dsRNA) mycovirus, tentatively named Botryosphaeria dothidea partitivirus 2 (BdPV2), was identified well. The BdPV2 harbored three dsRNA segments (1–3) with lengths of 1751, 1568, and 1198 bp, which encoded an RNA-dependent RNA polymerase (RdRp), a capsid protein (CP), and a hypothetical protein of unknown function, respectively. BLASTp searches revealed that the predicted protein sequences of dsRNA1 and dsRNA2 had the highest identities (74.95% and 61.01%) with the corresponding dsRNAs of Penicillium stoloniferum virus S (PsV-S), whereas dsRNA3 shared the highest identity (32.95%) with the dsRNA3 of Aspergillus ochraceous virus 1 (AoV1). Phylogenetic analysis indicated that BdPV2 belonged to the Gammapartitivirus genus and Partitiviridae family. To our knowledge, this is the first report of a gammapartitivirus in B. dothidea.
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Wang S, Ahmed I, Li X, Nie J, Guo L. Evidence for a novel partitivirus isolated from the entomopathogenic nematode Steinernema ceratophorum. Arch Virol 2022; 167:969-972. [PMID: 35112200 DOI: 10.1007/s00705-021-05314-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 10/12/2021] [Indexed: 12/26/2022]
Abstract
Nematodes are abundant, but little is known about their viruses. In this study, we report a novel partitivirus isolated from the entomopathogenic nematode species Steinernema ceratophorum, named "Steinernema ceratophorum partitivirus 1" (ScPV-1). The complete genome of ScPV-1 comprises two dsRNA segments, dsRNA1 (2352 bp) and dsRNA2 (2196 bp). Each dsRNA contains a single open reading frame (ORF), encoding a putative RNA-dependent RNA polymerase (RdRp) and a coat protein (CP), respectively. The sequences of the RdRp and CP showed the highest similarity (47% and 33% identity, respectively) to Plasmopara viticola associated partitivirus 7 (PvAP-7). A multiple sequence alignment and phylogenetic analysis of the RdRp of ScPV-1 and other selected viruses indicated that ScPV-1 is a new member of the genus Betapartitivirus in the family Partitiviridae.
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Affiliation(s)
- Shuangchao Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Irfan Ahmed
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xianhui Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jianhua Nie
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lihua Guo
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
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27
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Complete genome sequence of a novel partitivirus infecting the phytopathogenic fungus Alternaria tenuissima. Arch Virol 2022; 167:635-639. [PMID: 35031860 DOI: 10.1007/s00705-021-05332-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/30/2021] [Indexed: 11/02/2022]
Abstract
In the present study, a novel double-stranded RNA (dsRNA) mycovirus designated as "Alternaria tenuissima partitivirus 2" (AttPV2), was isolated from Alternaria tenuissima strain BJ-SY-1, a phytopathogenic fungus causing muskmelon leaf blight in Beijing municipality of China. The genome of AttPV2 comprises two dsRNA segments. The larger segment is 1829 bp in length and has a single open reading frame (ORF), potentially encoding a 65.8-kDa RNA-dependent RNA polymerase (RdRp), and the smaller segment is 1681 bp in length and also contains a single ORF, encoding a putative coat protein (CP) with a molecular mass of 56.0 kDa. BLASTp analysis revealed that the RdRp and CP encoded by the two ORFs of AttPV2 have the highest sequence identity, 85.9% and 75.0%, respectively, to their counterparts in Colletotrichum eremochloae partitivirus 1 (CePV1). Phylogenetic analysis based on RdRp sequences showed that AttPV2 clustered most closely with CePV1, a member of the proposed genus "Epsilonpartitivirus" in the family Partitiviridae. Hence, we propose that AttPV2 is a new epsilonpartitivirus from A. tenuissima. To the best of our knowledge, this is the first report of an epsilonpartitivirus infecting A. tenuissima.
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28
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Degola F, Spadola G, Forgia M, Turina M, Dramis L, Chitarra W, Nerva L. Aspergillus Goes Viral: Ecological Insights from the Geographical Distribution of the Mycovirome within an Aspergillus flavus Population and Its Possible Correlation with Aflatoxin Biosynthesis. J Fungi (Basel) 2021; 7:833. [PMID: 34682254 PMCID: PMC8538035 DOI: 10.3390/jof7100833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/14/2021] [Accepted: 10/03/2021] [Indexed: 12/13/2022] Open
Abstract
Microbial multi-level interactions are essential to control the success of spreading and survival of most microbes in natural environments. Phytopathogenic mycotoxigenic fungal species, such as Aspergillus flavus, represent an important issue in food safety. Usually, non-toxigenic strains are exploited for biocontrol strategies to mitigate infections by toxigenic strains. To comprehend all the biological variables involved in the aflatoxin biosynthesis, and to possibly evaluate the interplay between A. flavus toxigenic and non-toxigenic strains during intraspecific biocompetition, the "virological" perspective should be considered. For these reasons, investigations on mycoviruses associated to A. flavus populations inhabiting specific agroecosystems are highly desirable. Here, we provide the first accurate characterization of the novel mycovirome identified within an A. flavus wild population colonizing the maize fields of northern Italy: a selection of A. flavus strains was biologically characterized and subjected to RNAseq analysis, revealing new mycoviruses and a peculiar geographic pattern distribution in addition to a 20% rate of infection. More interestingly, a negative correlation between viral infection and aflatoxin production was found. Results significantly expanded the limited existent data about mycoviruses in wild A. flavus, opening new and intriguing hypotheses about the ecological significance of mycoviruses.
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Affiliation(s)
- Francesca Degola
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy; (G.S.); (L.D.)
| | - Giorgio Spadola
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy; (G.S.); (L.D.)
| | - Marco Forgia
- Institute for Sustainable Plant Protection, CNR, Strada delle Cacce 73, 10135 Torino, Italy; (M.F.); (M.T.); (W.C.)
| | - Massimo Turina
- Institute for Sustainable Plant Protection, CNR, Strada delle Cacce 73, 10135 Torino, Italy; (M.F.); (M.T.); (W.C.)
| | - Lucia Dramis
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy; (G.S.); (L.D.)
| | - Walter Chitarra
- Institute for Sustainable Plant Protection, CNR, Strada delle Cacce 73, 10135 Torino, Italy; (M.F.); (M.T.); (W.C.)
- Council for Agricultural Research and Economics—Research Centre for Viticulture and Enology CREA-VE, Via XXVIII Aprile 26, 31015 Conegliano, Italy
| | - Luca Nerva
- Institute for Sustainable Plant Protection, CNR, Strada delle Cacce 73, 10135 Torino, Italy; (M.F.); (M.T.); (W.C.)
- Council for Agricultural Research and Economics—Research Centre for Viticulture and Enology CREA-VE, Via XXVIII Aprile 26, 31015 Conegliano, Italy
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Zhu JZ, Guo J, Hu Z, Zhang XT, Li XG, Zhong J. A Novel Partitivirus That Confer Hypovirulence to the Plant Pathogenic Fungus Colletotrichum liriopes. Front Microbiol 2021; 12:653809. [PMID: 34248869 PMCID: PMC8262616 DOI: 10.3389/fmicb.2021.653809] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 05/14/2021] [Indexed: 12/20/2022] Open
Abstract
Here, we report a novel double-stranded RNA virus designated Colletotrichum liriopes partitivirus 1 (ClPV1) from the plant pathogenic fungus C. liriopes. ClPV1 genome has two double stranded RNAs (dsRNAs), named as dsRNA 1 and dsRNA 2, which in the lengths of 1,807 and 1,706 bp, respectively. The dsRNA 1 and dsRNA 2 encoded proteins showing significant amino acid (aa) sequence identity to the RNA-dependent RNA polymerase (RdRp) and coat protein (CP) of partitiviruses, respectively. Phylogenetic analysis using the aa sequences of RdRp and CP indicated that ClPV1 was grouped to members of the putative Epsilonpartitivirus genus in the Partitiviridae family. Spherical viral particles in approximately 35 nm in diameter and packaging the ClPV1 genome were isolated. Virus elimination and virus transfection with purified viral particles, and biological comparison revealed that ClPV1 could reduce the virulence and conidia production of C. liriopes. To the best of our knowledge, this is the first report of mycovirus in C. liriopes fungus.
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Affiliation(s)
- Jun Zi Zhu
- Hunan Engineering Research Center of Agricultural Pest Early Warning and Control, Hunan Agricultural University, Changsha, China.,Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
| | - Jun Guo
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
| | - Zhao Hu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
| | - Xu Tong Zhang
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
| | - Xiao Gang Li
- Hunan Engineering Research Center of Agricultural Pest Early Warning and Control, Hunan Agricultural University, Changsha, China.,Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
| | - Jie Zhong
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
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30
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Wan X, Zhao Y, Zhang Y, Wei C, Du H, Zhang H, Chen J, Yang L, Zang R, Wen C. Molecular characterization of a novel partitivirus isolated from the phytopathogenic fungus Aplosporella javeedii. Arch Virol 2021; 166:1237-1240. [PMID: 33560459 DOI: 10.1007/s00705-021-04988-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 12/21/2020] [Indexed: 11/24/2022]
Abstract
Aplosporella javeedii is a pathogenic fungus that causes canker and dieback of jujube in China. In this study, we report a new mycovirus, Aplosporella javeedii partitivirus 1 (AjPV1), isolated from A. javeedii strain NX55-3. The AjPV1 genome contains two double-stranded RNA elements (dsRNA1 and dsRNA2). The size of dsRNA1 is 2,360 bp, and it encodes a putative RNA-dependent RNA polymerase (RdRp), while dsRNA2 is 2,301 bp in length and encodes a putative capsid protein (CP). The sequences of RdRp and CP have significant similarity to those of members of the family Partitiviridae. Sequence alignment and phylogenetic analysis showed that AjPV1 is a new member of the family Partitiviridae that is related to members of the genus Betapartitivirus. To our knowledge, AjPV1 is the first mycovirus reported from A. javeedii.
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Affiliation(s)
- Xinru Wan
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Ying Zhao
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Yuanyuan Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Chenxing Wei
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Hongyan Du
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Han Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Jiahui Chen
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Lijie Yang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Rui Zang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Caiyi Wen
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China.
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31
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A novel mycovirus infecting Aspergillus nidulans that is closely related to viruses in a new genus of the family Partitiviridae. Arch Virol 2021; 166:659-664. [PMID: 33404858 DOI: 10.1007/s00705-020-04930-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 11/06/2020] [Indexed: 12/21/2022]
Abstract
The bisegmented genome of a novel double-stranded (ds) RNA mycovirus, named "Aspergillus nidulans partitivirus 1" (AnPV1), isolated from the fungus Aspergillus nidulans strain HJ5-47, was sequenced and analyzed. AnPV1 contains two segments, AnPV1-1 and AnPV1-2. AnPV1-1 has 1837 bp with an open reading frame (ORF) that potentially encodes a putative RNA-dependent RNA polymerase (RdRp) of 572 amino acids (aa). AnPV1-2 has 1583 bp with an ORF encoding a putative capsid protein (CP) of 488 aa. Phylogenetic analyses indicated that AnPV1 and related viruses clustered in a group that could represent a new unclassified genus in the family Partitiviridae.
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32
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Ahmed I, Li P, Zhang L, Jiang X, Bhattacharjee P, Guo L, Wang S. First report of a novel partitivirus from the phytopathogenic fungus Fusarium cerealis in China. Arch Virol 2020; 165:2979-2983. [DOI: 10.1007/s00705-020-04802-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 08/08/2020] [Indexed: 12/16/2022]
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33
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Wang Y, Zhao H, Xue C, Xu C, Geng Y, Zang R, Guo Y, Wu H, Zhang M. Complete genome sequence of a novel mycovirus isolated from the phytopathogenic fungus Corynespora cassiicola in China. Arch Virol 2020; 165:2401-2404. [PMID: 32757057 DOI: 10.1007/s00705-020-04723-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/01/2020] [Indexed: 12/19/2022]
Abstract
A novel mycovirus, named "Corynespora cassiicola bipartite mycovirus 1" (CcBV1), was isolated from a phytopathogenic fungus, Corynespora cassiicola, the causal agent of rubber leaf fall disease. The nucleotide sequence of the complete genome of CcBV1, which consists of two double-stranded RNA (dsRNA) segments, was determined. The first dsRNA is 2,002 bp in length and contains a single open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) (69 kDa), while the second is 1,738 bp in length and contains a single ORF encoding a hypothetical protein of unknown function, with an approximately molecular weight of 36 kDa. The amino acid sequences of the both deduced proteins are most similar (58.9% and 45.1% identity, respectively) to those of Cryphonectria parasitica bipartite mycovirus 1 (CpBV1). Phylogenetic analysis indicated that CcBV1 clusters together with CpBV1 and other unassigned dsRNA mycoviruses. To the best of our knowledge, this represents the first report of a mycovirus infecting C. cassiicola.
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Affiliation(s)
- Yanfen Wang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Hang Zhao
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Caiying Xue
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Chao Xu
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Yuehua Geng
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Rui Zang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Yuxia Guo
- College of Animal and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Haiyan Wu
- Centre for Modern Experimental Technology, Henan Agricultural University, Zhengzhou, 450002, Henan, China.
| | - Meng Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, Henan, China.
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34
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Telengech P, Hisano S, Mugambi C, Hyodo K, Arjona-López JM, López-Herrera CJ, Kanematsu S, Kondo H, Suzuki N. Diverse Partitiviruses From the Phytopathogenic Fungus, Rosellinia necatrix. Front Microbiol 2020; 11:1064. [PMID: 32670213 PMCID: PMC7332551 DOI: 10.3389/fmicb.2020.01064] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 04/29/2020] [Indexed: 01/18/2023] Open
Abstract
Partitiviruses (dsRNA viruses, family Partitiviridae) are ubiquitously detected in plants and fungi. Although previous surveys suggested their omnipresence in the white root rot fungus, Rosellinia necatrix, only a few of them have been molecularly and biologically characterized thus far. We report the characterization of a total of 20 partitiviruses from 16 R. necatrix strains belonging to 15 new species, for which “Rosellinia necatrix partitivirus 11–Rosellinia necatrix partitivirus 25” were proposed, and 5 previously reported species. The newly identified partitiviruses have been taxonomically placed in two genera, Alphapartitivirus, and Betapartitivirus. Some partitiviruses were transfected into reference strains of the natural host, R. necatrix, and an experimental host, Cryphonectria parasitica, using purified virions. A comparative analysis of resultant transfectants revealed interesting differences and similarities between the RNA accumulation and symptom induction patterns of R. necatrix and C. parasitica. Other interesting findings include the identification of a probable reassortment event and a quintuple partitivirus infection of a single fungal strain. These combined results provide a foundation for further studies aimed at elucidating mechanisms that underly the differences observed.
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Affiliation(s)
- Paul Telengech
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Sakae Hisano
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Cyrus Mugambi
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Kiwamu Hyodo
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Juan Manuel Arjona-López
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan.,Institute for Sustainable Agriculture, Spanish Research Council, Córdoba, Spain
| | | | - Satoko Kanematsu
- Institute of Fruit Tree Science, National Agriculture and Food Research Organization (NARO), Morioka, Japan
| | - Hideki Kondo
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Nobuhiro Suzuki
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
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35
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Filippou C, Coutts RHA, Stevens DA, Sabino R, Kotta-Loizou I. Completion of the sequence of the Aspergillus fumigatus partitivirus 1 genome. Arch Virol 2020; 165:1891-1894. [PMID: 32458177 PMCID: PMC7351820 DOI: 10.1007/s00705-020-04660-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 04/12/2020] [Indexed: 11/26/2022]
Abstract
A Portuguese isolate of Aspergillus fumigatus was found to contain three double-stranded (ds) RNA elements ranging in size from 1.1 to 1.8 kbp and comprising the genome of a strain of Aspergillus fumigatus partitivirus 1 (AfuPV-1) previously thought to contain only the two largest dsRNA elements. The sequence of the smallest dsRNA element is described here, completing the sequence of the AfuPV-1 genome. Sequence analysis of the element revealed an open reading frame encoding a protein of unknown function similar in size and distantly related to elements previously identified in other members of the family Partitiviridae.
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Affiliation(s)
- Charalampos Filippou
- Department of Biological and Environmental Sciences, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
| | - Robert H A Coutts
- Department of Biological and Environmental Sciences, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
| | - David A Stevens
- Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA
- California Institute for Medical Research, San Jose, California, USA
| | - Raquel Sabino
- Infectious Diseases Department, National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal
| | - Ioly Kotta-Loizou
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, UK.
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