Synthesis of glyceollins in soybean cotyledons treated with different concentrations of <i>R</i>. <i>guttatus</i> and <i>R</i>. <i>marina</i> (0.1, 0.2, 0.3, 0.4, and 0.5 mg/mL), sterile water (0), and <i>S</i>. <i>cerevisiae</i> (SC).

Cultivars treated with R. guttatus cutaneous secretions (species 1): (A) ‘Monsoy 8372 IPRO’; (B) ‘TMG 132 RR’; and (C) nontransgenic ‘TMG 4182’. Cultivars treated with R. marina cutaneous secretions (species 2): (D) ‘Monsoy 8372 IPRO’; (E) ‘TMG 132 RR’; and (F) nontransgenic ‘TMG 4182’. The experiments were performed three times for each treatment. The same letters indicate absence of significant differences by the Scott–Knott test at P ≤ 0.05. Metric bars indicate the standard error of the mean (SE). Data were transformed as follows: (x+1)0.5.