Fig. 1

Effects of salt stress treatment with different NaCl concentrations on P. macrophyllus seedlings. A Phenotype of P. macrophyllus seedling shoots under different concentrations of NaCl (0 mM [control, CK], 100 mM, 200 mM, 300 mM, 400 mM and 500 mM) treatment. Left, before treatment, right, after treatment for 14 days. Scale bar = 5 cm. B Leaf relative water contents of P. macrophyllus under different concentrations of NaCl treatment. C Leaf fresh weight of P. macrophyllus under different concentrations of NaCl treatment. Data shown are the average mean ± SE of three replicates (n = 3). Different letters above the bars indicates statistical significance at the P < 0.05 level among different concentrations of NaCl treatment according to Tukey’s test