122 



THE METABOLISM OF ALGAE 



l23'f-56789 



N/TROGEN AS PER CENT OF DRY WEIGHT 



FIG. 1 8. Production of fatty acids by various algae as a function of 

 their nitrogen contents (after ref. 94). 



will be seen that not only is the fatty acid production of the 

 various species different when compared at corresponding 

 nitrogen contents but that the capacity of a species to syn- 

 thesize fat is not the same at all levels of cell nitrogen. The 

 manner in which the capacity for fat synthesis varies in 

 relation to nitrogen content is different in different species. 



