Effects of oxygen and inorganic carbon concentrations on the photosynthetic quotients of marine algae

✍ Scribed by J. E. Burris

• Publisher: Springer-Verlag
• Year: 1981
• Tongue: English
• Weight: 550 KB
• Volume: 65
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00397114

✦ Synopsis

The photosynthetic quotients of the marine prymnesiophyte Pavlova lutheri and the marine dinoflagellate Glenodinum sp. were measured at different concentrations of dissolved oxygen and inorganic carbon. Dissolved oxygen concentration appeared to be the most important factor controlling the photosynthetic quotient, Photosynthetic quotients generally were between 1.0 and 1.8 at oxygen concentrations less than saturation, were approximately 1.0 at oxygen saturation, and generally were from 0.1 to 1.0 at oxygen concentrations greater than saturation. The photosynthetic quotients greater than 1.0 were not caused by lipid synthesis. They may have been partially caused by the presence of KNO3 rather than an ammonium salt in the growth media. The lowered photosynthetic quotients at higher oxygen concentrations were probably caused by algal photorespiration.