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Plant Physiology 56:164-166 (1975)
© 1975 American Society of Plant Biologists

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Articles

Carbon Dioxide Fixation in Isolated Kalanchoe Chloroplasts 1

Carolyn Levi2 and Martin Gibbs

a Department of Biology, Brandeis University, Waltham, Massachusetts 02154

Chloroplasts isolated from Kalanchoe diagremontiana leaves were capable of photosynthesizing at a rate of 5.4 µmoles of CO2 per milligram of chlorophyll per hour. The dark rate of fixation was about 1% of the light rate. A high photosynthetic rate was associated with low starch content of the leaves. Ribose 5-phosphate, fructose 1,6-diphosphate, and dithiothreitol stimulated fixation, whereas phosphoenolpyruvate and azide were inhibitors. The products of CO2 fixation were primarily those of the photosynthetic carbon reduction cycle.

2 Trainee of the National Institutes of Health, Grant GM-1586-07. Present address: Department of Biochemistry and Biophysics, University of California, Davis, Calif. 95616.

1 This research was supported by the United States Atomic Energy Commission Grant AT 11-1(3231).






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Copyright © 1975 by the American Society of Plant Biologists