DECAY OF THE DELAYED LIGHT IX ChlorcUa 133 



But I must emphasize what Strehler said about the transients. Whatever these 

 complicated transients are they depend on the whole photosynthetic system 

 much more than the Hill reaction. 



Rabinowitch: I was rather confused by the different saturation curves. Can 

 one not suppose that one corresponds to the long component and the short com- 

 ponent of different saturation curves and that the others are combinations? 



Arnold : Well, I am not convinced that it is justified to break my data into two 

 components. 



Rabinowitch: Now, the second question or suggestion. Perhaps some of this 

 complicated law of decay can be associated with the following: You get two prod- 

 ucts, H and YOH. If both disappear at the same rate, you have a simple second- 

 order reaction. If either one is pulled away faster than the other, you are going 

 to get something much more complicated and you have no reason to assume that 

 the two are pulled out at the same rate, one by the peroxide — 



Arnold : Particularly after the plant has been doing photosynthesis in a steady 

 way. 



Rabinowitch : Yes, so that seems to be a bimolecular reaction. 



References 



1. Strehler, B. L., and Arnold, W. A., "Light production by green plants," J 

 Gen. Physiol, 34, 809-820 (1951). 



