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Liu F, Xia L, Cao S, Sun H, Chen H, Deng Q, Li W. A novel alternavirus with three dsRNA segments from Fusarium pseudograminearum, the pathogen of Fusarium crown rot in wheat. Arch Virol 2024; 169:49. [PMID: 38366289 DOI: 10.1007/s00705-024-05982-z] [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: 11/13/2023] [Accepted: 12/26/2023] [Indexed: 02/18/2024]
Abstract
Three dsRNA segments were detected in Fusarium pseudograminearum strain CF14029, a pathogen causing Fusarium crown rot in China. Characterization and sequence analysis confirmed that these dsRNA sequences originated from the same virus. The viral genome consists of three dsRNA segments: dsRNA1 (3,560 nt in length), encoding an RNA-dependent RNA polymerase (RdRp), dsRNA2 (2,544 nt in length), encoding a hypothetical protein, and dsRNA3 (2,478 nt in length), encoding a putative coat protein (CP). Phylogenetic analysis based on the RdRp and CP amino acid sequences revealed a high degree of similarity of this virus to members of the genus Alternavirus, family Alternaviridae, isolated from other Fusarium fungi. As a novel member of the genus Alternavirus, this virus was provisionally named "Fusarium pseudograminearum alternavirus 1" (FpgAV1). Like other alternaviruses found in Fusarium species, the positive-sense strand of each genomic dsRNA of FpgAV1 possesses a poly(A) tail and a distinctive 5'-terminal octamer sequence (5'-GCT GTG TG-3'). This is the first report of the genomic sequence of an alternavirus identified in F. pseudograminearum.
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Affiliation(s)
- Fuyu Liu
- College of Agriculture, Yangtze University, 434025, Hubei, Jingzhou, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, 210014, Nanjing, Jiangsu, China
| | - Lele Xia
- College of Plant Protection, Nanjing Agricultural University, 210095, Jiangsu, Nanjing, China
| | - Shulin Cao
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, 210014, Nanjing, Jiangsu, China
| | - Haiyan Sun
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, 210014, Nanjing, Jiangsu, China
| | - Huaigu Chen
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, 210014, Nanjing, Jiangsu, China
| | - Qingchao Deng
- College of Agriculture, Yangtze University, 434025, Hubei, Jingzhou, China.
| | - Wei Li
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, 210014, Nanjing, Jiangsu, China.
- College of Plant Protection, Nanjing Agricultural University, 210095, Jiangsu, Nanjing, China.
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Ye Y, Liu Y, Zhang Y, Wang X, Li H, Li P. Metatranscriptome-based strategy reveals the existence of novel mycoviruses in the plant pathogenic fungus Fusarium oxysporum f. sp. cubense. Front Microbiol 2023; 14:1193714. [PMID: 37275129 PMCID: PMC10234264 DOI: 10.3389/fmicb.2023.1193714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 04/28/2023] [Indexed: 06/07/2023] Open
Abstract
Fusarium oxysporum f. sp. cubense (Foc) is a devastating plant pathogen that caused a great financial loss in the banana's source area. Metatranscriptomic analysis was used to determine the diversity of mycoviruses in 246 isolates of F. oxysporum f. sp. cubense. Partial or nearly complete genomes of 20 mycoviruses were obtained by BLASTp analysis of RNA sequences using the NCBI database. These 20 viruses were grouped into five distinct lineages, namely Botourmiaviridae, Endornaviridae, Mitoviridae, Mymonaviridae, Partitiviridae, and two non-classified mycoviruses lineages. To date, there is no report of the presence of mycoviruses in this pathogen. In this study, we demonstrate the presence of mycoviruses isolated from Foc. These findings enhance our overall knowledge of viral diversity and taxonomy in Foc. Further characterization of these mycoviruses is warranted, especially in terms of exploring these novel mycoviruses for innovative biocontrol of banana Fusarium wilt disease.
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Cheng X, Zhang L, Luo J, Yang S, Deng Y, Li J, Hou C. Two Pathogenic Fungi Isolated From Chalkbrood Samples and Honey Bee Viruses They Carried. Front Microbiol 2022; 13:843842. [PMID: 35495671 PMCID: PMC9039454 DOI: 10.3389/fmicb.2022.843842] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/22/2022] [Indexed: 11/13/2022] Open
Abstract
Ascosphaera apis and some Aspergillus species are the main pathogenic fungi of honey bee, and A. apis is the pathogen of chalkbrood disease. However, the infection mechanism of them is incompletely known and it is still unclear whether other factors impact their pathogenesis. In this study, Aspergillus tubingensis were obtained from the chalkbrood bee samples for the first time. Our results showed that A. tubingensis could promote the accumulation of the spores of A. apis. Pathogenicity test found that inoculation of the spores of the two fungi alone or their combination could induce disease characterization of chalkbrood and stonebrood but the extent was less than those in field. To further identify other pathogens impacted the pathogenesis, we found several honey bee viruses presented in the pathogenic fungi A. apis and A. tubingensis, which were different from previous reported. Our results indicated that acute bee paralysis virus (ABPV) and chronic bee paralysis virus (CBPV) could replicate in these two fungi and increased in titer with the going of cultivation time. In addition, CBPV could not only transmit vertically to the next generation by spores, but also spread horizontally to different fungi through hyphal anastomosis. These results suggested that the honey bee chalkbrood contained the other pathogenic fungi besides A. apis, the interactions between different pathogens of chalkbrood microbial communities may influence the prevalence of chalkbrood. Moreover, the discovery of honey bee viruses and their transmission mode in these two fungi enhanced the potential of exploring fungi virus as valuable factors that cause fungal disease outbreak.
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Affiliation(s)
- Xuefen Cheng
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou, China.,Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, China.,Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Li Zhang
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ji Luo
- Guangxi Zhuang Autonomous Region Forestry Research Institute, Nanning, China
| | - Sa Yang
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanchun Deng
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jianghong Li
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chunsheng Hou
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, China
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