(A, B) The image and relative intensity of DCF fluorescence were obtained when the spores were exposed to thymol (0, 50, 100, 150, and 200 μg/mL, respectively) for 30 min; (C, D) The image and relative intensity of DCF fluorescence were obtained when the spores treated with NADPH oxidase inhibitors (DPI, PY, and IMZ) were exposed to 200μg/mL thymol for 30 min. Each data point or bar was indicated as the means of 3 replicates ± standard deviation. Asterisk indicates that mean values of three replicates are significantly different from the treatment of thymol (P<0.05). Different letter indicate a significant difference between them (P <0.05).