Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
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 (2)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Keunecke, M.
Right arrow Articles by Hansen, U.P.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Keunecke, M.
Right arrow Articles by Hansen, U.P.
Agricola
Right arrow Articles by Keunecke, M.
Right arrow Articles by Hansen, U.P.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Experimental Botany, Vol. 52, No. 357, pp. 709-714, April 15, 2001
© 2001 Oxford University Press

Original Papers

Bundle sheath cells of small veins in maize leaves are the location of uptake from the xylem

M. Keunecke1, B. Lindner2, U. Seydel2, A. Schulz3 and U.P. Hansen1,4

1 Center for Biochemistry and Molecular Biology, University of Kiel, Leibnizstr. 11, D-24098 Kiel, Germany
2 Research Center Borstel, Center for Medicine and Biosciences, Parkallee 1-40, D-23845 Borstel, Germany
3 Department of Plant Biology, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40. DK-1871, Frederiksberg C, Copenhagen, Denmark

Rb+ as a tracer for K+ was used to test the hypothesis that uptake of K+ from xylem vessels of small veins into the symplast of maize leaves occurs at the xylem/bundle sheath cell interface. 22.5 min after immersing cut leaves into 20 mM RbCl+1 mM KCl, Rb+ appeared in the cells of the leaves. Sections of these leaves were freeze-dried. In cryo-thin sections (5 µm), 85Rb+ and 41K+ content was determined by laser microprobe mass analysis with a large resolution of about 1 µm. Determining the ratio of 85Rb+ to 41K+ in the cell walls and cytosols of bundle sheath cells, mesophyll cells, and in the cells between the xylem elements resulted in the following picture: In small veins, Rb+ entered the symplast directly at the xylem/bundle sheath cell interface.

Key words: Apoplast, LAMMA, rubidium, transport, veins.


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
 J Exp BotHome page
A. Rodriguez-Navarro and F. Rubio
High-affinity potassium and sodium transport systems in plants
J. Exp. Bot., March 1, 2006; 57(5): 1149 - 1160.
[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.