720 



LIGHT ABSORPTION BY PIGMENTS IN VIVO 



CHAP. 22 



100%.) This figure is too crude to reveal an increased participation of 

 chlorophyll b in the region of its band maximum in the red; but shows 



450 



700 750 



Fig. 22.39. 



500 550 600 650 

 WAVE LENGTH, m/x 



Absorption of pigment extracts from Ulva tacluca (green alga) 

 (after Montfort 1940). 



9? 



o 



_J 

 _l 

 >- 



X 



a. 

 o 



a: 

 o 



_i 



X 



o 



> 

 m 



z 

 g 



\- 

 a. 

 tr. 

 o 



CD 



m 



< 



100 

 500 600 



WAVE LENGTH, m/i 



Fig. 22. -40. Light absorption by 

 cliloi'ofucin (chlorophyll c), in per 

 cent of total absorption, by a meth- 

 anol extract from diat(jms (after 

 Strain and Manning 1942). 



100 



700 



500 600 



WAVE LENGTH, m>i 



Fig. 22.41. l'roi)ortions of light absorbed 

 hy cliloroi)hylls a and d in a methanol ex- 

 tract of Erythrophyllum delesserioides (after 

 Manning and Strain 1943). Absorption by 

 red and yellow pigments is not considered 

 in the calculation. 



clearly such an effect in the blue, l^etween 450 and 530 m^i, where the ab- 

 sorption by the 6-component is up to five times stronger than that by chloro- 

 phyll a. 



