682 



LIGHT ABSORPTION BY PIGMENTS IN VIVO 



CHAP. 22 



(a) (b) 



Fig. 22.8. Leaves of Naegelia zebrina (after Mecke and Baldwin 1937). Normal 

 leaves, left; water-filled leaves, right; photographed on (a) panchromatic plate and on 

 (6) infrared-sensitive plate (max. 850 mju)- Increase of transmittance by decreased 

 scattering best recognizable on the infrared photograph. 



Fig. 22.9. Leaf of Tussilago farfara on black background (after Schan- 

 derl and Kaempfert 1933). Dark sections imbibed with water, therefore 

 more transparent than the air-filled section. 



