-1 

 < 

 O 

 CO 



ID 

 u. 



en 



\- 

 z 



O 



o 



o 

 o 

 o 



> 



O 



< 



o 



o 



< 

 a: 



MM 



Fig. 3. The effect of various treatments on the localization of radioactivity in bean 

 stem sections following exposure to l-C"-2,4-D. Curve 1, 1-hr. exposure. Curve 2, 

 2-hr. exposure. Curve 3, 4-hr. exposure. Curve 4, 2-hr. exposure to unlabeled 2,4-D 

 followed by 2-hr. exposure to radioactive 2,4-D- Curve 5, 2-hr. exposure to radio- 

 active 2,4-D followed by 2 hrs., with no additions. Curve 6, 2-hr. exposure to radio- 

 active 2,4-D followed by 2-hr. exposure to unlabeled 2,4-D. 



[281 ] 



