Fig. 3

Effects of different levels of NaCl stress on Na⁺ (a), K⁺(b) and the K⁺ /Na⁺ (c) in leaves for the non-transgenic control (CK) and the transgenic lines with with ‘High’ (T3 and T13), ‘Medium’ (T1, T2 and T5), ‘Low’ (T11 and T15) degree tolerance (as ranked in Table 2). Significant differences among means over the NaCl-stress treatments were determined according to Tukey’s HSD test at P < 0.05. The line bars are standard errors (n = 9, i.e., 3 replicates × 3 runs of the experiment)