J. A. BASSHAM AND M. CALVIN 



synthesis as compared with leaving them in the dark for several 

 hours. This indicates a photosynthesis enhancement of the rate 



17 



16 



15 



14 



13 



12 



•/♦ 



10 



9- 



8 - 



QUANTUM REQUIREMENT OF 

 PHOTOSYNTHESIS BY Chlorella 



• UNCORRECTED 

 O CORRECTED 



5 P/R 



10 



15 



I 



10 15 20 30 



q X 10-'^ 



40 



Fig. 4. Relation between quantum requirement in photosynthesis and 

 the ratio of photosynthesis to respiration rate. 



of respiration over the rate required by the plants while resting 

 in the dark. 



64 



