EMPIRICAL PLANT SPECTRA 



093 



Fig. 22.25. 



400 500 



600 700 800 

 WAVE LENGTH, m^ 



900 1000 



Transmission spectrum {To/T) of a Chromatium suspension 

 (after Vermeulen, Wassink and Reman 1937). 



800 900 



WAVE LENGTH, m>. 



1000 



400 



R, bonds of red pigment 

 spirillaxonfhin 



G, bonds of green pigment 

 boctenoctilorophyll 



600 800 



WAVE LENGTH, m/i 



Fig. 22.26. Absorption curve of ex- 

 tracted pigment (broken line) compared 

 with transmission curve of pigment in 

 live cells of Streptococcus varians (strain 

 Cll) (after Frencli 1940). Absorption 

 bands of extracted pigment shifted to 

 let maxima coincide with those of the live 

 cells. 



Fig. 22.27. Relative absorption curve 

 of the pigments of Spirillum rubrum in 

 living bacteria (measured photoelectric- 

 ally using a scattering control of bleached 

 bacteria) (after French 1937). 



