Fig. 1.

Growth parameters of two sorghum varieties under ER stress. SDM (a) and RDM (b) display the dry masses of shoots and roots, respectively. SL (c) and RL (d) indicate the length of shoots and roots, respectively. Three days old sorghum seedlings (CSF18 and CSF 20) were grown under control, TM 0.5 µg mL⁻¹, 1.5 µg mL⁻¹, and 2.5 µg mL⁻¹ treatments until they reach seven days old. The values are the mean of 7 repetitions, and bars represent standard error. Data were submitted to analysis of variance (ANOVA), and all four treatments were compared by the Tukey test (p < 0.05) in each TM concentration. Lowercase letters compare the two sorghum varieties. Uppercase letters compare the treatments within each variety of sorghum