Figure 3

Mean activity levels of different defense-related compounds in tea plants. The activity of PPO (a), chitinase (b), and PAL (c) and the content of callose (d) in the control (Con) and laminarin-treated leaves (Lam) were analyzed at different time intervals. (e) Callose deposition in the control (Con) and laminarin-treated leaves (Lam). Leaflets were stained with aniline blue to detect callose. Representative microscope images are shown. Scale bars represent 50 μm. Values represent the mean + SE of five repeats. Asterisks indicate the significant differences between treatments and controls at each time point (*P < 0.05; **P < 0.01; Student’s t-test).