﻿BOTANICAL GAZETTE 



greater oxygen absorption. It does not necessarily follow, however, 

 that sprouting was brought about by the greater energy release 

 resulting from the increased respiration. The facts seem to indicate 

 that this was not the case. It is more probable that under normal 

 conditions the skin becomes suberized before the completion of 



TABLE XXIV 











bromid/as- 



January 18 





28.54 

 27.85 



i:3-93 

 i:3-83 



some growth mechanism requiring oxygen. The rate of oxygen 

 diffusion through the suberized skin then determines the time, the 

 natural rest period, required for the perfection of the growth 

 mechanism. 



TABLE XXV 



The role of oxygen in plant physiological processes is very com- 

 plex and at the present time quite obscure. However, several cases 

 are noted in the literature which show the wide range of oxygen 

 influence in growth processes. Ivanoff (ii) claims that oxygen 

 is necessary for the transformation of zymogen into zymase. 

 Zaleski (32) has shown that protein synthesis is influenced by 



