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Zhang C, Zheng X, Tie Z, Xi H, Shi M, Ma Y, Chen W, Mi Y, Yang R, Zhao S, Zhang X. Identification of Mycoviruses in the Pathogens of Fragrant Pear Valsa Canker from Xinjiang in China. Viruses 2024; 16:355. [PMID: 38543721 PMCID: PMC10974596 DOI: 10.3390/v16030355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 05/23/2024] Open
Abstract
As a common disease, canker seriously affects the yield and quality of fragrant pear due to the lack of effective control measures. Some fungi have been reported to harbor rich reservoirs of viral resources, and some mycoviruses can be used as biocontrol agents against plant diseases. In this study, 199 isolates were obtained from diseased branches of fragrant pear in the main production areas of Xinjiang. Among them, 134 belonged to Valsa spp., identified using morphological and molecular biological techniques, in which V. mali was the dominant species. The mycoviruses in Valsa spp. were further identified using metatranscriptomic sequencing and RT-PCR. The results revealed that a total of seven mycoviruses were identified, belonging to Botourmiaviridae, Endornaviridae, Fusariviridae, Hypoviridae, Mitoviridae, and Narnaviridae, among which Phomopsis longicolla hypovirus (PlHV) was dominant in all the sample collection regions. The Cryphonectria hypovirus 3-XJ1 (CHV3-XJ1), Botourmiaviridae sp.-XJ1 (BVsp-XJ1), and Fusariviridae sp.-XJ1 (Fvsp-XJ1) were new mycoviruses discovered within the Valsa spp. More importantly, compared with those in the virus-free Valsa spp. strain, the growth rate and virulence of the VN-5 strain co-infected with PlHV and CHV3-XJ1 were reduced by 59% and 75%, respectively, and the growth rate and virulence of the VN-34 strain infected with PlHV were reduced by 42% and 55%, respectively. On the other hand, the horizontal transmission efficiency of PlHV decreased when PlHV was co-infected with CHV3-XJ1, indicating that PlHV and CHV3-XJ1 were antagonistic. In summary, the mycoviruses in Valsa spp. were identified in Xinjiang for the first time, and three of them were newly discovered mycoviruses, with two strains yielding good results. These results will offer potential biocontrol resources for managing pear canker disease and provide a theoretical basis for the control of fruit tree Valsa canker disease.
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Affiliation(s)
- Chenguang Zhang
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Xiaoya Zheng
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Zhanjiang Tie
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Hui Xi
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Mai Shi
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Yanjun Ma
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Wenbin Chen
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Yingjie Mi
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Rui Yang
- Agricultural Technology Extension Station of the First Division, Alaer 843300, China;
| | - Sifeng Zhao
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
| | - Xuekun Zhang
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, China; (C.Z.); (X.Z.); (Z.T.); (H.X.); (M.S.); (Y.M.); (W.C.); (Y.M.)
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Contreras-Soto MB, Tovar-Pedraza JM. Viruses of plant-pathogenic fungi: a promising biocontrol strategy for Sclerotinia sclerotiorum. Arch Microbiol 2023; 206:38. [PMID: 38142438 DOI: 10.1007/s00203-023-03774-8] [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: 10/20/2023] [Revised: 11/17/2023] [Accepted: 11/26/2023] [Indexed: 12/26/2023]
Abstract
Plant pathogenic fungi pose a significant and ongoing threat to agriculture and food security, causing economic losses and significantly reducing crop yields. Effectively managing these fungal diseases is crucial for sustaining agricultural productivity, and in this context, mycoviruses have emerged as a promising biocontrol option. These viruses alter the physiology of their fungal hosts and their interactions with the host plants. This review encompasses the extensive diversity of reported mycoviruses, including their taxonomic classification and range of fungal hosts. We highlight representative examples of mycoviruses that affect economically significant plant-pathogenic fungi and their distinctive characteristics, with a particular emphasis on mycoviruses impacting Sclerotinia sclerotiorum. These mycoviruses exhibit significant potential for biocontrol, supported by their specificity, efficacy, and environmental safety. This positions mycoviruses as valuable tools in crop protection against diseases caused by this pathogen, maintaining their study and application as promising research areas in agricultural biotechnology. The remarkable diversity of mycoviruses, coupled with their ability to infect a broad range of plant-pathogenic fungi, inspires optimism, and suggests that these viruses have the potential to serve as an effective management strategy against major fungi-causing plant diseases worldwide.
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Affiliation(s)
- María Belia Contreras-Soto
- Laboratorio de Fitopatología, Centro de Investigación en Alimentación y Desarrollo, Coordinación Regional Culiacán, 80110, Culiacán, Sinaloa, Mexico
| | - Juan Manuel Tovar-Pedraza
- Laboratorio de Fitopatología, Centro de Investigación en Alimentación y Desarrollo, Coordinación Regional Culiacán, 80110, Culiacán, Sinaloa, Mexico.
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Wu T, Mao H, Hai D, Cheng J, Fu Y, Lin Y, Jiang D, Xie J. Molecular characterization of a novel fungal alphaflexivirus reveals potential inter-species horizontal gene transfer. Virus Res 2023; 334:199151. [PMID: 37302657 PMCID: PMC10410596 DOI: 10.1016/j.virusres.2023.199151] [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: 04/26/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 06/13/2023]
Abstract
Sclerotinia sclerotiorum is a notorious phytopathogenic fungus that harbors diverse mycoviruses. A novel positive-sense single-stranded RNA virus, Sclerotinia sclerotiorum alphaflexivirus 2 (SsAFV2), was isolated from the hypovirulent strain 32-9 of S. sclerotiorum, and its complete genome was determined. The SsAFV2 genome contains 7,162 nucleotides (nt), excluding the poly (A) structure, and is composed of four open reading frames (ORF1-4). ORF1 encodes a polyprotein that contains three conserved domains: methyltransferase, helicase, and RNA-dependent RNA polymerase (RdRp). The ORF3 putative encodes coat proteins (CP), with ORF2 and ORF4 encoding hypothetical proteins of unknown functions. Phylogenetic analysis revealed that SsAFV2 clustered with Botrytis virus X (BVX) based on multiple alignments of helicase, RdRp, and CP, but the methyltransferase of SsAFV2 was most closely related to Sclerotinia sclerotiorum alphaflexivirus 1, suggesting that SsAFV2 is a new member of the Botrexvirus genus within the Alphaflexiviridae family, and also revealed the occurrence of potential inter-species horizontal gene transfer events within the Botrexvirus genus during the evolutionary process. Our results contribute to the current knowledge regarding the evolution and divergence of Botrexviruses.
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Affiliation(s)
- Tun Wu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Huilun Mao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China; College of Informatics, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Du Hai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Jiasen Cheng
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Yanping Fu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Yang Lin
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Daohong Jiang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China
| | - Jiatao Xie
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China; Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Hubei Hongshan Laboratory, Wuhan, Hubei, China.
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Xiao J, Wang X, Zheng Z, Wu Y, Wang Z, Li H, Li P. Molecular characterization of a novel deltaflexivirus infecting the edible fungus Pleurotus ostreatus. Arch Virol 2023; 168:162. [PMID: 37195309 DOI: 10.1007/s00705-023-05789-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/18/2023] [Indexed: 05/18/2023]
Abstract
A novel positive single-stranded RNA virus, Pleurotus ostreatus deltaflexivirus 1 (PoDFV1), was isolated from the edible fungus Pleurotus ostreatus strain ZP6. The complete genome of PoDFV1 is 7706 nucleotides (nt) long and contains a short poly(A) tail. PoDFV1 was predicted to contain one large open reading frame (ORF1) and three small downstream ORFs (ORFs 2-4). ORF1 encodes a putative replication-associated polyprotein of 1979 amino acids (aa) containing three conserved domains - viral RNA methyltransferase (Mtr), viral RNA helicase (Hel), and RNA-dependent RNA polymerase (RdRp) - which are common to all deltaflexiviruses. ORFs 2-4 encode three small hypothetical proteins (15-20 kDa) without conserved domains or known biological functions. Sequence alignments and phylogenetic analysis suggested that PoDFV1 is a member of a new species in the genus Deltaflexivirus (family Deltaflexiviridae, order Tymovirales). To our knowledge, this is the first report of a deltaflexivirus infecting P. ostreatus.
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Affiliation(s)
- Junbo Xiao
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Xin Wang
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Ziru Zheng
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Yugu Wu
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Zhe Wang
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Huaping Li
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China.
| | - Pengfei Li
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China.
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