\ 



% 



■f ^s^k^ 



Figure 8. Autoradiograph of a bean plant grown at pH 4.0, 0.000 1 M P and 

 0.002 p.p.m. Fe. The radioiron was introduced into the leaf (via a vein of the leaflet 

 showing the highest concentration of radioiron) 24 hours before harvest. 



