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Article
Effects of Decreased Net Carbon Exchange on Carbohydrate Metabolism in Sugar Beet Source Leaves
Plant Physiology
  • Theodore C. Fox
  • Donald R. Geiger, University of Dayton
Document Type
Article
Publication Date
11-1-1984
Abstract
The relationship between CO2 concentration and starch synthesis and degradation was studied by measuring leaf starch content and disappearance of14C-starch. At a concentration of 340 microliters CO2 per liter, starch accumulated without degradation of previously synthesized starch. Degradation of starch began when CO2 concentration was lowered, but its synthesis continued. At 120 microliters CO2 per liter rates of synthesis and degradation were equal. Even at the CO2 compensation point, synthesis of starch continued. Concomitant starch synthesis and mobilization supported export from the leaf. Changes in starch metabolism that occur when photosynthesis is CO2-limited provide a means to study regulation of starch metabolism and carbon allocation in translocating leaves.
Inclusive pages
763-768
ISBN/ISSN
0032-0889
Publisher
American Society of Plant Biologists
Peer Reviewed
Yes
Disciplines
Citation Information
Theodore C. Fox and Donald R. Geiger. "Effects of Decreased Net Carbon Exchange on Carbohydrate Metabolism in Sugar Beet Source Leaves" Plant Physiology Vol. 76 (1984)
Available at: http://works.bepress.com/donald_geiger/58/