EVOLUTION BY Chlorellai II 



427 



Oe CONCENTRATION IN mm. Hg. 

 1 2 3 4 5 6 



3 -4 - 

 o 



> -6 



UJ 



C\J 



■8 



TERMINAL RESPIRATION RATE 

 BEFORE Oj SPIKE 



± 



2 4 6 8 10 12 



Og CONCENTRATION IN m^ MOLES / ml. 



Fig. 9. Plot of data from Fig. 8. 



14 



prior dark oxidation rate) and the dissociation of the O2 burst process 

 from that of CO2 fixation is harmonious with most of the available 

 time course measurements of related processes. For example, the 

 inverse oxygen influence on the time course of anaerobic fluorescence 

 reported in Chlorella (6) is quantitatively in harmony with the burst 

 O2 dependence. While the range of oxygen dependence here is similar 

 (0 to 1% O2), further correlation is subject to the usual dependency 

 of time course phenomena upon conditions of culture, age, etc., in 

 Chlorella. Similarly, the general character of the time course of the 

 luminescence (7) which reflects reversal of the overall process, and the 

 time course of bound phosphate (8) approximate the composite tran- 

 sient O2 rate (burst superposition on sustained rate) presented in our 

 data. ATP and fixed C^*02 (9) approximate the course of our com- 

 posite Oo rate minus l)urst rate. In the stud}' of CO2 transients in 

 C/i/o/-e//a with the glass electrode (10,11), an interval (0 to 60 seconds) 



