Figure 2.

Phytohormone levels in Brassica rapa shoots (left column, panels A–C) and roots (right column, panels D–F) in response to hormonal application. The levels of (A, D) JA, (B, E) SA and (C, F) ABA were measured at 4, 8, 24 and 48 h after local MeJA, ABA, SA or ethephon application. Bars represent log₂ fold changes (log₂ FC + SE) of concentrations in relation to the respective control. In each hormonal treatment, asterisks over the horizontal line represent the overall significant treatment main effect and those over individual bars indicate significant differences between the treatment group and their respective control plants, according to two-way ANOVA (n = 3–4 per treatment and harvest time, except for ABA-treated roots at 24 h where n = 2) *P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.001.