This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Huber, S. C. Articles by Bickett, D. M. Search for Related Content PubMed PubMed Citation Articles by Huber, S. C. Articles by Bickett, D. M. Agricola Articles by Huber, S. C. Articles by Bickett, D. M.

Articles

Evidence for Control of Carbon Partitioning by Fructose 2,6-Bisphosphate in Spinach Leaves ¹

United States Department of Agriculture, Agricultural Research Service, North Carolina State University, Raleigh, North Carolina 27650, Department of Botany, North Carolina State University, Raleigh, North Carolina 27650, Department of Crop Science, North Carolina State University, Raleigh, North Carolina 27650

Excision of spinach (Spinacia oleracea L.) leaves had no effect on photosynthetic rates, but altered normal carbon partitioning to favor increased formation of starch and decreased formation of sucrose. The changes were evident within 2 hours after excision. Concurrently, leaf fructose-2,6-bisphosphate content increased about 5-fold (from 0.1 to 0.5 nanomoles per gram fresh weight). The activities of sucrose-P synthase and cytoplasmic fructose 1,6-bisphosphatase in leaf extracts remained constant during the time period tested. It is postulated that the rise in fructose 2,6-bisphosphate was responsible for the change in carbon partitioning.

This article has been cited by other articles:

				E. Baroja-Fernandez, F. J. Munoz, A. Zandueta-Criado, M. T. Moran-Zorzano, A. M. Viale, N. Alonso-Casajus, and J. Pozueta-Romero Most of ADP{middle dot}glucose linked to starch biosynthesis occurs outside the chloroplast in source leaves PNAS, August 31, 2004; 101(35): 13080 - 13085. [Abstract] [Full Text] [PDF]