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Plant Physiology 52:561-564 (1973)
© 1973 American Society of Plant Biologists

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Articles

Proline Uptake and Utilization by Chlorella pyrenoidosa

Alan D. McNamer1 and Cecil R. Stewart

a Department of Botany and Plant Pathology, Iowa State University, Ames, Iowa 50010

Conditions for proline uptake and utilization by Chlorella pyrenoidosa Chick are described. Proline is taken up by growing cultures during late log phase growth after depletion of glucose from the medium. However, proline uptake by stationary phase cultures requires the presence of glucose in the medium. The results are consistent with the interpretation that some carbohydrate is required for proline uptake but proline uptake is inhibited by the accumulation of intracellular carbohydrates.

Metabolism of proline was by incorporation into protein and oxidation to CO2 by conversion to glutamic acid and subsequent metabolism of the carbon by the Krebs cycle.

1 Present address: Department of Biochemistry, College of Medicine, University of Iowa, Iowa City, Iowa 52240.






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Copyright © 1973 by the American Society of Plant Biologists