Botrytis cinerea mycoviruses (antagonist)

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cultures (upper row) and pathogenicity (lower row on Nicotiana benthamiana leaves) of 2 strains of Botrytis cinerea. The strain on the right side is infected with the mycovirus "Botrytis cinerea mymonavirus 1" (click on image to enlarge it)
Authors: Fangmin Hao, Mingde Wu and Guoqing Li
Source: Viruses (2019) 10 (8) 432

Botrytis cinerea mycoviruses (antagonist)

Various mycoviruses have been described infecting the common plant pathogen Botrytis cinerea. These can be common and during a survey in Spain more than 50% of the B. cinerea isolates were infected with mycoviuses (Rodríguez-García et al., 2014). The viruses reduce the virulence of the fungus (hypovirulence). They are RNA viruses and both single-stranded and double-stranded viruses have been described.

Some viruses have been studied in detail and are listed separately. These include the viruses Botrytis virus F and Botrytis virus X which have been previously assigned to the family Flexiviridae, a family now replaced by several other families (e.g. Alphaflexiviridae and Gammaflexiviridae). The viruses covered here belong to other families like the Hypoviridae or Narnaviridae.