FIGURE 4.

Effects of increasing tryptamine (Trpm) concentrations on yeast growth. Trpm was added to minimal medium [1 mM (NH₄)₂SO₄] at increasing concentrations (50, 100, 250, 500, 750, and 1000 mg/L). (A) Growth curves obtained with S. cerevisiae Vin7 and M. pulcherrima FLAVIA. (B) Lag phase fold-change for each strain at different Trpm concentrations. (C) Maximal growth fold-change for each strain at different Trpm concentrations. Statistical analysis was performed comparing the effects of Trpm concentrations in each strain, using Tukey’s test statistical method; asterisk denotes a p-value < 0.05. The fold-change for each growth parameter was determined in relation to the control (no-supplemented condition, w/o).