Plant Cell
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Supplemental Data
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Related articles in Plant Cell
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 Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via ISI Web of Science (39)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Knoblauch, M.
Right arrow Articles by van Bel, A. J. E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Knoblauch, M.
Right arrow Articles by van Bel, A. J. E.
Agricola
Right arrow Articles by Knoblauch, M.
Right arrow Articles by van Bel, A. J. E.
Plant Cell, Vol. 13, 1221-1230, May 2001, Copyright © 2001, American Society of Plant Physiologists

Reversible Calcium-Regulated Stopcocks in Legume Sieve Tubes

Michael Knoblaucha, Winfried S. Petersb, Katrin Ehlersa, and Aart J. E. van Bela
a Institut für Allgemeine Botanik und Pflanzenphysiologie, Justus-Liebig-Universität, Senckenbergstrasse 17-21, D-35390 Giessen, Germany
b AK Kinematische Zellforschung, Biozentrum der Johann Wolfgang Goethe-Universität, Marie-Curie-Strasse 9, D-60439 Frankfurt am Main, Germany

Correspondence to: Michael Knoblauch, michael.knoblauch{at}bot1.bio.uni-giessen.de (E-mail), 49-641-99-35119 (fax)

Sieve tubes of legumes (Fabaceae) contain characteristic P-protein crystalloids with controversial function. We studied their behavior by conventional light, electron, and confocal laser scanning microscopy. In situ, crystalloids are able to undergo rapid (<1 sec) and reversible conversions from the condensed resting state into a dispersed state, in which they occlude the sieve tubes. Crystalloid dispersal is triggered by plasma membrane leakage induced by mechanical injury or permeabilizing substances. Similarly, abrupt turgor changes imposed by osmotic shock cause crystalloid dispersal. Because chelators generally prevent the response, divalent cations appear to be the decisive factor in crystalloid expansion. Cycling between dispersal and condensation can be induced in opened cells by repetitive exchange of bathing media containing either Ca2+ or chelators. Sr2+ and Ba2+, but not Mg2+, are equally active. In conclusion, the fabacean P-protein crystalloids represent a novel class of mechanically active proteinaceous structures, which provide an efficient mechanism with which to control sieve tube conductivity.


Related articles in Plant Cell:

A Calcium-Regulated Gatekeeper in Phloem Sieve Tubes
Nancy A. Eckardt
Plant Cell 2001 13: 989-992. [Full Text]  



This article has been cited by other articles:


Home page
 Plant Physiol.Home page
M. V. Thompson and S. M. Wolniak
A Plasma Membrane-Anchored Fluorescent Protein Fusion Illuminates Sieve Element Plasma Membranes in Arabidopsis and Tobacco
Plant Physiology, April 1, 2008; 146(4): 1599 - 1610.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
J. B. Hafke, A. C.U. Furch, M. U. Reitz, and A. J.E. van Bel
Functional Sieve Element Protoplasts
Plant Physiology, November 1, 2007; 145(3): 703 - 711.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
A. C. U. Furch, J. B. Hafke, A. Schulz, and A. J. E. van Bel
Ca2+-mediated remote control of reversible sieve tube occlusion in Vicia faba
J. Exp. Bot., August 1, 2007; 58(11): 2827 - 2838.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
W. S. Peters, M. Knoblauch, S. A. Warmann, R. Schnetter, A. Q. Shen, and W. F. Pickard
Tailed Forisomes of Canavalia gladiata: A New Model to Study Ca2+-driven Protein Contractility
Ann. Bot., July 1, 2007; 100(1): 101 - 109.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
T. Will, W. F. Tjallingii, A. Thonnessen, and A. J. E. van Bel
Molecular sabotage of plant defense by aphid saliva
PNAS, June 19, 2007; 104(25): 10536 - 10541.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
C. A. Atkins and P. M. C. Smith
Translocation in Legumes: Assimilates, Nutrients, and Signaling Molecules
Plant Physiology, June 1, 2007; 144(2): 550 - 561.
[Full Text] [PDF]

Home page
 J Exp BotHome page
W. S. Peters, A. J. E. van Bel, and M. Knoblauch
The geometry of the forisome-sieve element-sieve plate complex in the phloem of Vicia faba L. leaflets
J. Exp. Bot., September 1, 2006; 57(12): 3091 - 3098.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
W. F. Tjallingii
Salivary secretions by aphids interacting with proteins of phloem wound responses
J. Exp. Bot., March 1, 2006; 57(4): 739 - 745.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
T. Will and A. J. E. van Bel
Physical and chemical interactions between aphids and plants
J. Exp. Bot., March 1, 2006; 57(4): 729 - 737.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
J. Kehr
Phloem sap proteins: their identities and potential roles in the interaction between plants and phloem-feeding insects
J. Exp. Bot., March 1, 2006; 57(4): 767 - 774.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
S. Dinant, A. M. Clark, Y. Zhu, F. Vilaine, J.-C. Palauqui, C. Kusiak, and G. A. Thompson
Diversity of the Superfamily of Phloem Lectins (Phloem Protein 2) in Angiosperms
Plant Physiology, January 1, 2003; 131(1): 114 - 128.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
N. A. Eckardt
A Calcium-Regulated Gatekeeper in Phloem Sieve Tubes
PLANT CELL, May 1, 2001; 13(5): 989 - 992.
[Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications THE PLANT CELL PLANT PHYSIOLOGY
Copyright © 2001 by the American Society of Plant Biologists