REST IN BUDS OF WOODY PLANTS 209 



16 C. H. Hendershott and D. R. Walker, Science, 130 (1959) 3378. 

 1" S. HousLEY AND W. C. Taylor, J. Exptl. Botanv, 9 (1958) 458. 

 18 P. F. Wareing and M. Black, The Physiology of Forest Trees, Ed. K.V. 

 Thimann, Ronald Bros. Co., New York, 1958. 



DISCUSSION 



Koller: You mentioned artificial wakening of buds as the 

 result of an increase in acetaldehyde or anaerobiosis in buds, 

 what happens in this respect as a result of the cold treatment? 



Samish: It is thought that cold treatment destroys inhibitors. 



Avi-Dor: Do dinitrophenol and related compounds convert 

 the aerobic respiration to glycolysis? Usually dinitrophenol 

 increases respiration. Might it not be a lifting of the Pasteur 

 effect? Is there any proof for an increase in glycolysis? 



Samish: This work has not been done with the type of 

 material we are talking about, but it has been shown in animal 

 tissues that energy-rich phosphorus bonds are not created and 

 that respiration is directed into fermentative pathways. 



Avi-DoR : The alternative explanation for the lack of respira- 

 tion might be the absence of an ATP acceptor. The addition of 

 dinitrophenol breaks down ATP and respiration can start. 

 There must not necessarily be a conversion from aerobiosis to 

 anaerobiosis. 



Reinhold: I should like to point out in answer to Dr. Avi- 

 Dor's earlier question that in both shoots and roots occurs a 

 reversal of the Pasteur effect in the presence of dinitrophenol, 

 with the occurrence both of anaerobic respiration and of 

 increased glycolysis. 



LIBRAfiylpo 



