Skip Navigation


JXB Advance Access originally published online on February 27, 2004
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
55/398/879    most recent
erh087v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (5)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Maurel, K.
Right arrow Articles by Pétel, G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Maurel, K.
Right arrow Articles by Pétel, G.
Agricola
Right arrow Articles by Maurel, K.
Right arrow Articles by Pétel, G.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Experimental Botany, Vol. 55, No. 398, pp. 879-888, April 1, 2004
© 2004 Oxford University Press

Regulation of Growth, Development and Whole Organism Physiology

Sorbitol uptake is regulated by glucose through the hexokinase pathway in vegetative peach-tree buds

Received 13 October; Accepted 14 December 2003

Karine Maurel1, Soulaïman Sakr1,*, François Gerbe1, Agnès Guilliot1, Marc Bonhomme2, Rémy Rageau2 and Gilles Pétel1

1 UMR 547-PIAF Université Blaise Pascal, 24 avenue des Landais, F-63177 Aubière Cedex, France
2 UMR 547-PIAF INRA, domaine de Crouël, 234 avenue du Brézet, F-63039 Clermont-Ferrand Cedex 2, France

* To whom correspondence should be addressed. Fax: +33 4 73 40 79 16. E-mail: Soulaiman.SAKR{at}piaf.univ-bpclermont.fr

In peach trees (Prunus persica L. Batsch cv. Redhaven), sorbitol is a primary photosynthetic product and may play an important role in the budbreak process. Surprisingly, before budbreak (from January to early March), the concentration of sorbitol in the xylem sap decreases, while that of hexoses (glucose and fructose) increases. The aim of this work was to study the control of sorbitol uptake into vegetative buds by hexoses. Sorbitol uptake was selectively inhibited by hexoses at low and physiological concentrations and this effect was both reversible and concentration-dependent. In addition, the active uptake of sorbitol significantly declined in the plasma membrane vesicles-enriched fraction purified from glucose-treated vegetative buds, suggesting that the inhibitory action of glucose was at the membrane level. Finally, among several glucose analogues tested, only hexokinase substrates (2-deoxyglucose and mannose) were able to mimic the glucose effect, which was completely blocked by the hexokinase inhibitor mannoheptulose. These results represent the first steps towards a better understanding of polyol transport control in plants.

Key words: Budbreak, hexoses, regulation, sugar transport, vegetative bud, xylem sap.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Physiol.Home page
C. Conde, A. Agasse, D. Glissant, R. Tavares, H. Geros, and S. Delrot
Pathways of Glucose Regulation of Monosaccharide Transport in Grape Cells
Plant Physiology, August 1, 2006; 141(4): 1563 - 1577.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.