The counteraction of exogenous L-proline at different concentrations w
ith salinity (100 mM NaCl at sublethal concentration) were observed on
germinating rice. Supplemented 30 mM L-proline was shown to be the mo
st effective; at higher concentration it reduced seedling growth and K
+/Na+ ratio. Thus 30 mM L-proline can alleviate the salinity stress in
rice seedlings.