Abstract
This study was performed to examine whether Na and/or Cl application to culture medium increased nitrate reduction and assimilation in Suaeda salsa (L.) Pall. S. salsa was treated with NaCl solution containing 0.75mM Ca(15NO3)2. Treatments consisted of (1)-Na-Cl, (2)+Na-Cl, (3)-Na+Cl, (4)+Na+Cl solutions. The highest growth rate was attained in +Na+Cl treatment, followed by -Na+Cl, +Na-Cl and -Na-Cl treatments. No clear difference among treatments was shown in 15N atom% excess of total-N and NO3-N. Plants in -Na+Cl and +Na+Cl treatments contained higher 15N atom% excess of crude protein, total-15N content and crude protein-15N content than those in -Na-Cl and +Na-Cl treatments. These results suggested that Na has no relation to nitrate reduction and assimilation, but Cl increases nitrate reduction and assimilation.
