Figure 4.

Chlorophyll content ((a): Chl a; (b): Chl b; (c): Chl a+b; (d): Car) of tomato seedlings grown in hydroponic nutrient solution by non-pretreated and pretreated with VA (50 μM; 2 d) under drought stress (4 d). Here, C: control, VA: vanillic acid, W0: without water, PEG: 12% PEG. Mean value (±SD) was calculated from the three replications (n = 3) for each treatment; dissimilar letters in a column refer to significant different among the treatments at p ≤ 0.05 applying Fisher’s LSD test.