Stimulation of Root Growth in Cuttings 

 Table 2 {concluded) 



81 



As shown by table 2 and also by figure 1, potassium permanganate 

 causes a marked stimulation of root growth in Ligustrum in the 24-hours, 

 5-days, and continuous treatments. With but one exception the maximum 

 stimulation occurred in the strongest solutions, indicating that higher 

 concentrations might give even better results.. Subsequent experiments 

 have shown, however, that concentrations close to the optimum were 

 used in the 24-hours and continuous treatments. The optima in these 

 two gave results of 4.09 ±0.36 and 3.33 ±0.28, respectively, relative to 

 the check as unity. The difference between the check and the best 

 treatment is over eight and a half times the probable error. The cuttings 

 placed in the sand, as shown by the same table, indicated a lesser degree 



