155 



Bacon Ke 



only the slowly decaying portion remained Below 15% intensity, the slowly 

 decaying portion also decreased. 



400 410 420 430 440 450 



WAVELENGTH. m>i 



Fig. 2. Difference spectrum of aged 

 chloroplasts in the presence of 

 2 X 10-3 M ascorbate and 3 x lO'^ M 

 PMS. ~ 



Fig. 3. Dependency of the composite peak on illumination intensity, 

 o total peak height. 

 • height of the slowly decaying portion. 



