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The Interaction between Hypovirulence-Associated Chrysoviruses and Their Host Fusarium Species
Chengwu Zou1, Xueying Cao1, Qiujuan Zhou1
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Laboratory of Sugarcane Biology, College of Agriculture, Guangxi University, Nanning 530004, China.
Abstract:
Chrysoviruses are isometric virus particles (35-50 nm in diameter) with a genome composed of double-stranded RNAs (dsRNA). These viruses belonged to the Chrysoviridae family, named after the first member isolated from Penicillium chrysogenum. Phylogenetic classification has divided the chrysoviruses into Alphachrysovirus and Betachrysovirus genera. Currently, these chrysoviruses have been found to infect many fungi, including Fusarium species, and cause changes in the phenotype and decline in the pathogenicity of the host. Thus, it is a microbial resource with great biocontrol potential against Fusarium species, causing destructive plant diseases and substantial economic losses. This review provides a comprehensive overview of three chrysovirus isolates (Fusarium graminearum virus 2 (FgV2), Fusarium graminearum virus-ch9 (FgV-ch9), and Fusarium oxysporum f. sp. dianthi mycovirus 1 (FodV1)) reported to decline the pathogenicity of Fusarium hosts. It also summarizes the recent studies on host response regulation, host RNA interference, and chrysovirus transmission. The information provided in the review will be a reference for analyzing the interaction of Fusarium species with chrysovirus and proposing opportunities for research on the biocontrol of Fusarium diseases. Finally, we present reasons for conducting further studies on exploring the interaction between chrysoviruses and Fusarium and improving the accumulation and transmission efficiency of these chrysoviruses.
Insights
Chrysoviruses, dsRNA viruses infecting fungi like Fusarium, show biocontrol potential. This review highlights three isolates that reduce Fusarium pathogenicity, offering insights for disease management.
Area of Science:
- Mycoviruses
- Plant Pathology
- Biocontrol Agents
Background:
- Chrysoviruses are isometric dsRNA viruses in the Chrysoviridae family, infecting various fungi.
- Phylogenetic analysis categorizes them into Alphachrysovirus and Betachrysovirus genera.
- Infection by chrysoviruses can alter fungal phenotype and reduce pathogenicity.
Purpose of the Study:
- To provide a comprehensive overview of chrysoviruses with biocontrol potential against Fusarium species.
- To summarize research on host response, RNA interference, and transmission of specific Fusarium-infecting chrysoviruses (FgV2, FgV-ch9, FodV1).
- To explore opportunities for biocontrol of Fusarium diseases using chrysoviruses.
Main Methods:
- Literature review of studies on chrysovirus isolates affecting Fusarium species.
- Analysis of research on host-chrysovirus interactions, including host response and RNA interference.
- Summary of chrysovirus transmission mechanisms in fungal hosts.
Main Results:
- Three chrysovirus isolates (FgV2, FgV-ch9, FodV1) are identified as reducing Fusarium pathogenicity.
- Studies indicate chrysovirus infection influences host response and RNA interference pathways.
- Understanding chrysovirus transmission is crucial for effective biocontrol application.
Conclusions:
- Chrysoviruses represent a promising microbial resource for biocontrol of destructive Fusarium plant diseases.
- Further research into chrysovirus-Fusarium interactions is warranted to optimize biocontrol strategies.
- Enhancing chrysovirus accumulation and transmission efficiency is key to their practical application.
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