69 



of the total amount of translocated material at the a=0.014 level than 

 meristems of plants which did receive GA, pretreatment (10.59 percent). 

 On a dpm/mg basis, the same pattern of distribution occurred; however, 

 it was not significant at the a=0.05 level. 



Daughter plants which were produced after initiation of the treat- 



14 

 ment period consistently contained higher amounts of C activity on 



both a dpm/mg and percentage basis when the parent plant did not receive 

 GA 3 pretreatment. However, due to the variability in the data as 

 reflected by the standard error term, none of the differences in the 

 means were significant at the a=0.05 level. Six-day, trial 2, plants 

 yielded similar results but were also non-significant at the a=0.05 

 level . 



A significant difference in mean dpm/mg was noted for roots of six- 

 day, trial 1, plants, i.e., 5.06 dpm/mg for the plants with GA 3 and 

 10.44 dpm/mg for the plants without GA3 (a=0.04). A similar trend was 

 also observed on a percentage of total translocated radioactivity for 

 roots of six-day, trial 1, plants, however, the difference between 

 treatment means was not significant at the a=0.05 level. Significant 

 differences were not observed for roots of six-day, trial 2, plants on 

 either a dpm/mg or percentage basis. 



Results obtained for leaves other than the leaves which received the 



14 

 direct application of C-labeled 2,4-D provided the only indication of 



increased translocation of 2,4-D due to GA3 pretreatment. Leaves of 



both the one-day and six-day (trial 1) plants which were treated with 



GA3 contained significantly higher (a=0.004 and a=0.021, respectively) 



