Figure 2.

Extremely Low Concentration of Acetic Acid, Propionic Acid, and Sorbic Acid Induce Appressorium Formation

Each acid was added at each concentration as shown on the x axis.

(A and B) Effects of acetic acid on germ tube elongation and appressorium formation. Diagonal bars indicate the rates of conidia germination, and filled bars indicate the rates of conidia with appressorium formation in the wild-type (A) and Δcbp1 mutant (B). Experiments were repeated three times. *p < 0.05 (Student's t test). Error bars show standard deviations.

(C and D) Effects of propionic acid (C) and sorbic acid (D) on appressorium formation. Black bars indicate the appressorium formation rate of the wild-type strain, and white bars indicate that of the Δcbp1 mutant. *p < 0.05 (Student's t test). Error bars show standard deviations.

See also Table S1 and Figures S5–S7.