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Shoot (A) and (B), and roots (C) and (D) Na+ concentration in maize plantlets of the inbred line B73 and hybrid P26 grown for 10 days under control (C), drought (WS), salinity (SS), or the combination of drought and salinity (WS+SS) and after 4 days of recovery from the stresses. Values represent means ± SE (n = 3). Arrows represent sampling times throughout the experimental period.
