18 



TRANSLOCATION IN PLANTS 



Acer were obtained. In all cases iodine tests showed little 

 or no starch above the upper ring and abundant starch 



Table 2. — Effect of Rings on Carbohydrate Transport as Indicated 



BY Starch Tests and Sugar Analyses 



Acer saccharum 



Fagus grandifolia 



* This part corresponded to that between the rings of the ringed stems. Starch in the 

 check stem decreased gradually toward the apex and increased somewhat toward the base 

 where it appeared very much as below the lower ring. 



t This part was in a position corresponding to that between rings of the ringed stem. 



between the rings. The stem analyzed for sugar was a 

 young sapling 3 cm. in diameter at a point 80 cm. from the 



