Figure 4. Time course evolution of ABA levels in leaves and roots of wild type and vte1 and vte4 mutants of A. thaliana growing in a hydroponic system exposed to control or salt stress conditions for 72h. Data are the mean ± SE of n = 4 replicates. Results of statistics are given in the panels (ANOVA, P ≤ 0.05). NS, not significant.