Fig. 1

Effects of different concentrations of PEG (0, 1%, 5%, and 10%) on root length (a) and plant height (b) of tomato seedlings. Photographs (c) showed the tomato seedlings were incubated in the Hoagland solution containing different concentrations of PEG for 7 days. The data are the average of three replicates and are presented as means ± SE. Different letters indicate significant differences at P < 0.05 according to Duncan’s multiple range tests