Fusarium mycoviruses (antagonists)

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cultures of Fusarium graminearum - from top left to bottom right: virus free, infected with the mycoviruses FgV1, FgV2 and FgV3 (click on image to enlarge it)
Authors: Kyung-Mi Lee et al.
Source: PLoS ONE (2014) 9 (6) e100989
wheat heads infected with Fusarium graminearum - from left to right: wild type F. graminearum strain (virus-free), infected with the mycoviruses FgV1, FgV2, FgV3 and FgV4 (click on image to enlarge it)
Authors: Kyung-Mi Lee et al.
Source: PLoS ONE (2014) 9 (6) e100989

Fusarium mycoviruses (antagonist)

Species of Fusarium are among the most destructive pathogens of crops. Several mycoviruses have been described from Fusarium, some of which are of interest as biological control agents of plant pathogens. These belong to various families, including the Partitiviridae, Narnaviridae, Totiviridae, Deltaflexiviridae and Chrysoviridae.

For example, a number of mycoviruses have been described from the Fusarium head blight pathogen Fusarium graminearum, like "Fusarium graminearum virus 1" (FgV1) from the family Partitiviridae. This virus causes abnormal colony morphology, defects in perithecium development, and reductions in growth rate, conidiation, and virulence, e.g. see Lee et al. (2014). Others, like the viruses FgV3 and FgV4 from the families Totiviriridae and Chrysoviridae, cause few if any changes in the host fungus.