Figure 1.

Growth response of A. thaliana to F. oxysporum volatiles. (A) Mean shoot fresh weights of ecotype Col-0 cocultivated with no fungus (control) and 46 F. oxysporum strains individually for 2 weeks are shown. Means and standard errors for nine biological replicates per treatment, with five seedlings per replicate, are shown. Isolates that did not cause statistically significant growth enhancement compared to control (Tukey's test, α < 0.05) are marked with star. Arrows denote the three strains used for subsequent analyses. Images of seedlings after cocultivation with these three strains are shown in (B–E). The center partition, marked by an arrow in (B) prevents physical contact between two compartments. A strip of fungal culture medium along the center partition was removed at the time of fungal inoculation to prevent fungal overgrowth to the plant side.