FIG 2.

Effects of HetPV13-an1 on the growth of H. annosum and H. parviporum. (A) Growth (in cm²) of Heterobasidion strains in 6 days on 2% MEA plates. Green bars show strains infected with HetPV13-an1, and purple bars indicate isogenic strains without the virus. The red and blue bars show two cultures of 94233/32D, which were reinfected with HetPV13-an1 (sampling is shown in Fig. 1C). The error bars represent standard deviation. (B) Growth of H. parviporum in Norway spruce trees in the forest, showing the number of trees with (dark gray) or without (light gray) H. parviporum growth 10 cm above the inoculation point. (C) Growth (in cm²) of H. parviporum in inoculated spruce trees. +, RK15A* (HetPV13-an1 infected); −, RK15A without HetPV13-an1.