Fig 4. Levels of free amino acids in tomato leaves subjected to moderate drought stress and T. evansi infestation at 10 days post infestation (dpi).

Data represent the ratio ± SE of the different treatments with respect to non-infested control plants at 10 dpi. = [(Treatment−Control 10dpi) / Control 10dpi]. The division between essential and nonessential amino acids is based on a study with the closely related species Tetranychus urticae [32]. * Indicates significant difference of the treatment with the control determined by Dunnet post hoc test p<0.05.