Figure 2.

In vitro antifungal activity of two NPAAs (GABA and ß-alanine) against S. sclerotiorum, the causal agent of white mold disease of common bean. (A) Antifungal activity of GABA and ß-alanine against S. sclerotiorum, (B) Mycelial growth inhibition (%) of S. sclerotiorum after the treatment with different concentrations of GABA and ß-alanine (12.5, 25, 50, 75, and 100 mg.L⁻¹). Bars represent the average of six biological replicates (n = 6), whereas whiskers represent the standard deviation (means ± SD). Different letters indicate statistically significant differences between treatments (p< 0.05). (C–E) Probit regression analysis of the inhibition effects of the commercial fungicide “Rizolex”, ß-alanine, and GABA, respectively, against S. sclerotiorum. The probit regression lines are presented as blue solid lines, whereas the confidence intervals (95%) are edged with dotted red lines.