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Viruses Infecting the Plant Pathogenic Fungus Rhizoctonia solani.


ABSTRACT: The cosmopolitan fungus Rhizoctonia solani has a wide host range and is the causal agent of numerous crop diseases, leading to significant economic losses. To date, no cultivars showing complete resistance to R. solani have been identified and it is imperative to develop a strategy to control the spread of the disease. Fungal viruses, or mycoviruses, are widespread in all major groups of fungi and next-generation sequencing (NGS) is currently the most efficient approach for their identification. An increasing number of novel mycoviruses are being reported, including double-stranded (ds) RNA, circular single-stranded (ss) DNA, negative sense (-)ssRNA, and positive sense (+)ssRNA viruses. The majority of mycovirus infections are cryptic with no obvious symptoms on the hosts; however, some mycoviruses may alter fungal host pathogenicity resulting in hypervirulence or hypovirulence and are therefore potential biological control agents that could be used to combat fungal diseases. R. solani harbors a range of dsRNA and ssRNA viruses, either belonging to established families, such as Endornaviridae, Tymoviridae, Partitiviridae, and Narnaviridae, or unclassified, and some of them have been associated with hypervirulence or hypovirulence. Here we discuss in depth the molecular features of known viruses infecting R. solani and their potential as biological control agents.

SUBMITTER: Abdoulaye AH 

PROVIDER: S-EPMC6950361 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Viruses Infecting the Plant Pathogenic Fungus <i>Rhizoctonia solani</i>.

Abdoulaye Assane Hamidou AH   Foda Mohamed Frahat MF   Kotta-Loizou Ioly I  

Viruses 20191130 12


The cosmopolitan fungus <i>Rhizoctonia solani</i> has a wide host range and is the causal agent of numerous crop diseases, leading to significant economic losses. To date, no cultivars showing complete resistance to <i>R. solani</i> have been identified and it is imperative to develop a strategy to control the spread of the disease. Fungal viruses, or mycoviruses, are widespread in all major groups of fungi and next-generation sequencing (NGS) is currently the most efficient approach for their i  ...[more]

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