NO. 17 GROWTH OF ALGAE IN WAVE-LENGTH REGIONS MEIER II 



grown in darkness. The assumed total volume based on cell length 

 and growth rate computations varied in a similar manner. 



Cells with beautiful green plastids were found in the cultures grown 

 in the blue, red, and yellow regions as well as in the daylight. The 

 cells exposed to the green region had green plastids but contained 

 much granular material. Those cells exposed to the infrared had 

 large vacuoles and very granular contents but contained green plastids. 

 Colorless cells and cells with faded yellow-green plastids and dis- 

 integrated contents were characteristic of the cultures exposed to 

 darkness. 



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