Chrysoviruses in Magnaporthe oryzae
AbstractMagnaporthe oryzae, the fungus that causes rice blast, is the most destructive pathogen of rice worldwide. A number of M. oryzae mycoviruses have been identified. These include Magnaporthe oryzae. viruses 1, 2, and 3 (MoV1, MoV2, and MoV3) belonging to the genus, Victorivirus, in the family, Totiviridae; Magnaporthe oryzae. partitivirus 1 (MoPV1) in the family, Partitiviridae; Magnaporthe oryzae. chrysovirus 1 strains A and B (MoCV1-A and MoCV1-B) belonging to cluster II of the family, Chrysoviridae; a mycovirus related to plant viruses of the family, Tombusviridae (Magnaporthe oryzae. virus A); and a (+)ssRNA mycovirus closely related to the ourmia-like viruses (Magnaporthe oryzae. ourmia-like virus 1). Among these, MoCV1-A and MoCV1-B were the first reported mycoviruses that cause hypovirulence traits in their host fungus, such as impaired growth, altered colony morphology, and reduced pigmentation. Recently we reported that, although MoCV1-A infection generally confers hypovirulence to fungi, it is also a driving force behind the development of physiological diversity, including pathogenic races. Another example of modulated pathogenicity caused by mycovirus infection is that of Alternaria alternata chrysovirus 1 (AaCV1), which is closely related to MoCV1-A. AaCV1 exhibits two contrasting effects: Impaired growth of the host fungus while rendering the host hypervirulent to the plant, through increased production of the host-specific AK-toxin. It is inferred that these mycoviruses might be epigenetic factors that cause changes in the pathogenicity of phytopathogenic fungi. View Full-Text
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Moriyama, H.; Urayama, S.-I.; Higashiura, T.; Le, T.M.; Komatsu, K. Chrysoviruses in Magnaporthe oryzae. Viruses 2018, 10, 697.
Moriyama H, Urayama S-I, Higashiura T, Le TM, Komatsu K. Chrysoviruses in Magnaporthe oryzae. Viruses. 2018; 10(12):697.Chicago/Turabian Style
Moriyama, Hiromitsu; Urayama, Syun-ichi; Higashiura, Tomoya; Le, Tuong M.; Komatsu, Ken. 2018. "Chrysoviruses in Magnaporthe oryzae." Viruses 10, no. 12: 697.
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