Figure 1. Relative growth of Verticillium longisporum 43-3 on PDA at 25°C for four days when exposed to volatiles emitted from 19 Arabidopsis thaliana accessions.

Red bars represent mycelial growth in the absence of plant tissue and black bars represent (A) leaf and (B) root tissue. Data represent the mean of five replicates, and the error bar represents the standard error. Significant differences between the control mycelia and those exposed to plant material are indicated by asterisks (*: p<0.05, **: p<0.01, ***: p<0.001). (C) The effect on the in vitro growth of V. longisporum 43-3 of leaf volatiles emitted from the three most suppressive accessions after four days of exposure. The red circle indicates a diameter of 1.6 cm.