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Shoot Na+ uptake measured as shoot 22Na+ accumulation per root FW in wheat seedlings pretreated for 5 d in 25 mm NaCl and 2 mm CaCl2 in modified half-strength Hoagland. A, Shoot uptake over 4 h showing delay in initial uptake. B, Shoot uptake over 24 h. Black symbols represent salt tolerant line 149; white symbols represent salt sensitive Tamaroi; mean ± sem (n = 4).
