Table VI.

Effect of Ca²⁺ on total Na⁺ accumulation per plant and on the amount of Na⁺ accumulated per unit mass of root, measured in 6-week-old plants grown hydroponically as described in “Materials and Methods,” and supplemented with 50 mm NaCl from 3 weeks after planting

Data represent mean ± se (n = 14 at 0.05 mm Ca²⁺ activity, n = 24 at 0.2 mm Ca²⁺, and n = 21 at 3.0 mm Ca²⁺ activity). FM, Fresh mass.

Ca2+ Activity	Na+ Content	Na+ Content per Unit Mass of Root
mm	μmol plant−1	μmol g−1 root FM plant−1
0.05	225 ± 15	1281 ± 163
0.2	155 ± 11	853 ± 79
3.0	39 ± 7	335 ± 68