Uptake of NO2 by plants grown at different salinity levels.

It is demonstrated that the uptake of nitrogen dioxide (NO2) by Phaseolus vulgaris L. is decreased by the addition of sodium chloride (NaCl) to the root medium, as a result of increased diffusive resistance of the leaves. The NO2-uptake rate constant measured kinetically was in agreement with the nitrite content of the leaves after the fumigation.