Table I.

Genotypic differences in net Na⁺ uptake

Net Na⁺ uptake, Na⁺ transport to the shoot (shoot Na⁺ uptake), and root Na⁺ uptake in salt tolerant line 149 and salt sensitive Tamaroi, calculated over a 5- to 10-d period in half-strength modified Hoagland plus 50 mm NaCl and 2 mm CaCl₂. Values are means ± sem (n = 4).

Na+ Uptake Parameter	Line 149	Tamaroi
μmol g FW−1(root) d−1
Net Na+ uptake (whole plant)	17.3 ± 0.4	26.3 ± 2.9
Shoot Na+ uptake	7.1 ± 0.5	17.3 ± 1.5
Root Na+ uptake	10.2 ± 0.5	9.0 ± 0.5