Fig. 6.

Salt stress response parameters evaluated in tolerant parent IR64-Saltol, susceptible parents Vialone Nano (VN), Onice (O) and VN1, VN4, O1 introgression lines. Plantlets were grown for 7 days (A Electrolyte leakage evaluation) or 14 days (B Relative water content in leaves; C shoot/root fresh weight ratio; D shoot and root length) in modified Yoshida solution in the absence (blue columns, controls) or presence (orange columns) of 80 mM NaCl. Data are the means from three independent experiments (12 plants per genotype for each experiment); bars represent the SE values (n = 36). Student’s t-test (*p < 0.05). Values with the same letter(s) are not significant at p < 0.05, as resulted by a Tukey post-hoc test with a Bonferroni correction