336 



PHOTOMECHANICAL CONSIDERATIONS 



+ I& 



-1.2 



^0.8 



^0.4 



00 



-04 



TPN"*"— TPNH 



ATP? 



PPNR 

 (Ferredoxin)? 



Chi "^ 



Cyt f . 



'Plosto- 

 ^ quinone 

 ? 



Acceptor 



yt bf 



Fig. 1. Schematic diagram showing the approximate redox relationships of 

 some species proposed as involved in the primary quantum conversion act or 

 acts. 



Hole Migration 



Chi (705) 



Light 



Absorption 



Excifon 



Migration 

 Electron Transfer 



H20-'02l 

 \Chl (680) 

 Electron Migration 



Fig. 2. Schematic diagram of the proposed mechanism for the 

 primary quantum conversion act or acts. 



