Fig. 1

The effect of NaCl and thymol on the growth of tobacco seedlings. (a) The 6-day-old tobacco seedlings were transferred to plates containing 0–200 mM NaCl to measure root length after 72 h. (b) The seedlings were treated with 0–200 μM thymol and 150 mM NaCl for 72 h before measuring root length. (c) Tobacco seedlings were treated with water (C), 150 mM NaCl (S), 50 μM thymol (T) or the mixture of both (S + T) separately for 72 h. The root length was measured each 12 h. (d) The seedlings were photographed after 72-h treatment. Different letters indicate significant differences between the treatments (p < 0.05, ANOVA, LSD)