Figure 5.

Effect of Ca²⁺ on salt tolerance of wild-type (•), sos1 (▪, □), and sos3 (○) seedlings. ▪, sos1 seedlings that were killed by the treatments. Four-day-old seedlings grown on MS plates were transferred to grow on nutrient media supplemented with 50 mM NaCl and various levels of Ca²⁺. The nutrient media were the same as for MS except that Ca²⁺ was removed. Growth measurement was similar to that in Fig. 3. [Bars = SD (n = 15).]