Figure 2. PLC-inhibitors suppress vanillin accumulation and PAL activity in C. chinense suspension cells. Cells were treated with 100 μM neomycin (N), 10 μM U73122 or 10 μM U73343 (inactive analog) for 15 min before SA addition and the PAL activity (A and B) and vanillin content (C and D) were evaluated. Data represent the mean of 3 independent experiments ± SE, *P < 0.001.