Fig. 1

Shoot (A) and (B) root fresh weight (g plant⁻¹) of maize seedlings treated or not (control) with humic acids (HA) in acclimation period. After 5 days of treatment, the seedlings were exposed to moderate salinity conditions (60 mM NaCl). The shoot (C) and root (D) fresh weight (g plant⁻¹) of primed state induced by HA and control plants were measured after 3 days of the salt exposition. The means (n  =  10) was followed by standard deviation. The *, ** and ns represent the significant difference at P  <  0.01 and P  <  0.05 and not significant, respectively, by LSD test