The germination and cotyledon greening rates of each line under different NaCl concentrations. (a) Col-0, atpprt1, OE2 and OE10 were monitored for 7 days on MS medium plates with and without salt; the germination (b) and cotyledon greening (c) rates of Col-0, atpprt1, OE2 and OE10 on MS medium plates supplemented with different concentrations of NaCl. Error bars represent ± SD (n = 50, * p < .05 and ** p < .01, t-test).