Figure 1

Characteristics of virus-free F. graminearum and FgV1-DK21-infected F. graminearum . (A) Virus-free F. graminearum (B) FgV1-DK21-infected F. graminearum. (C) Morphological differences between virus-free and virus-infected F. graminearum. ^aRadial growth was measured on PDA 120 h after inoculation. ^bThe number of spores was measured in CMC broth at 25°C for 9 days. The number of spores indicated represents the number per 1 ml. Data were described previously [6]. ^cProduction of deoxynivalenol and 15-acetyldeoxynivalenol. For toxin analysis, all strains were grown in minimal medium supplemented with 5 mM agmatine and incubated for 7 days. ^dN/D: not detected. ^* The value is significantly different than that of the virus-free isolate as determined by a Student’s t-test.