FIGURE 6.

In vitro effects of TPS20c diterpene products on the growth of Pythium irregulare. (A) Growth inhibition assays with different concentration of dolabelladienol. (B) Growth inhibition assays with different concentration of dolathaliatriene. Values represent the mean ± standard error mean (SEM) of 3 biological replicates. Normalized area was calculated by dividing two averaged radial measurements (area = πr_avg²) of the growth area by the average area of the mock (DMSO). Statistical differences were determined in R (version 3.2.1) by One-way ANOVA and post hoc Tukey-Kramer HSD comparisons against the mock where α ≤ 0.05. ^∗ = p ≤ 0.05, ^∗∗ = 0.05 ≥p ≥ 0.001, ^∗∗∗ = p ≤ 0.0001.