Figure 6. The relative expression levels of the 12 AsbHLH genes under MeJA treatments. A.sinensis calluses were treated with 100 µM MeJA for different times (0 h, 2 h, 6 h, 1 d, 4 d, 8 d, 12 d and 16 d ). The expression levels of AsbHLH genes at different times were compared with that at 0 h and GADPH was used as an internal control. Data are means (± SE) of three independent biological replicates. Asterisks indicate significant differences between each treatment point and controls (0-h) (* p < 0.05, ** p < 0.01, student’s