LIGHT CURVES OF PHOTOSYNTHESIS 



977 



500 



15% Hj, pH 6 3 

 ,o' 



INCIDENT INTENSITY, erg/cm sec 

 250 



o 

 o 



200 

 150 



I % H2S2O3, pH 6 3 

 \- (S) ^, 



without KCM 



o 100 



< 



H .50 



3 



tr A 



.9/ 



o'/0.00l5 % KCN 



xlO" 







I 



INCIDENT INTENSITY, erg/cm sec. 



INCIDENT INTENSITY, erg/cm sec 



600 



0187% NaNj 



xlO" 



INCIDENT INTENSITY, erg/cm' sec. 



300 



250 



1% H2S2O3, pH 6 3 



/-.^^" 



1 2'7o 



eti./lure'^i" ^ 



X IC 



INCIDENT INTENSITY, erg/cm sec 



Fig. 28.11. Light curves of inhibited purple bacteria (Chromatium) (after 

 Wassink, Katz and Dorrestein 1 942 ) . ( H. or H2S2O3 as reductant, 5 % CO2, 29 ° C . ) 

 HCN shows no effect in weak light with Ih. With HoSaOj, effect is shown also iu 

 weak light. Nn^OII-IICl shows no effect in weak light (c/. fig. 28.9B). With 

 ethylurethan, the effect is particularly strong in weak light. 



