Plant Physiol. Drug Metab Dispos
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on December 1, 2006; 10.1104/pp.106.092643

This Article
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow All Versions of this Article:
143/1/28    most recent
pp.106.092643v1
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 Similar articles in this journal
Right arrow Similar articles in 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 Web of Science (14)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Marten, H.
Right arrow Articles by Hedrich, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Marten, H.
Right arrow Articles by Hedrich, R.
Agricola
Right arrow Articles by Marten, H.
Right arrow Articles by Hedrich, R.

Received November 5, 2006
Accepted November 26, 2006

Ca2+-dependent and -independent ABA Activation of Plasma Membrane Anion Channels in Guard Cells of Nicotiana tabacum

Holger Marten , Kai Konrad , Petra Dietrich , M. Rob G. Roelfsema , and Rainer Hedrich *

University of Würzburg, Biocenter, Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany

* Corresponding author; email: hedrich{at}botanik.uni-wuerzburg.de.

Drought induces stomatal closure, a response that is associated with the activation of plasma membrane anion channels in guard cells, by the phytohormone ABA. In several species, this response is associated with changes in the cytoplasmic free Ca2+ concentration. In Vicia faba, however, guard cell anion channels activate in a Ca2+-independent manner (Levchenko et al., 2005, PNAS 102; 4203-4208). Because of potential differences between species, Nicotiana tabacum guard cells were studied in intact plants, with simultaneous recordings of the plasma membrane conductance and the cytoplasmic free Ca2+ concentration. ABA triggered transient rises in cytoplasmic Ca2+ in the majority of the guard cells (14 out of 19). In 7 out of 14 guard cells the change in cytoplasmic free Ca2+ closely matched the activation of anion channels, while the Ca2+ rise was delayed in 7 other cells. In the remaining 5 cells, ABA stimulated anion channels without a change in the cytoplasmic Ca2+ level. Even though ABA could activate anion channels in N. tabacum guard cells independent of a rise in the cytoplasmic Ca2+ concentration, patch clamp experiments showed that anion channels in these cells are stimulated by elevated Ca2+, in an ATP-dependent manner. Guard cells thus seem to have evolved both Ca2+-independent and -dependent ABA signalling pathways. Guard cells of N. tabacum apparently utilize both pathways, while ABA signalling in V. faba seems to be restricted to the Ca2+-independent pathway.




This article has been cited by other articles:


Home page
 J Exp BotHome page
C. Sirichandra, A. Wasilewska, F. Vlad, C. Valon, and J. Leung
The guard cell as a single-cell model towards understanding drought tolerance and abscisic acid action
J. Exp. Bot., April 1, 2009; 60(5): 1439 - 1463.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
X. Ma, O. Shor, S. Diminshtein, L. Yu, Y. J. Im, I. Perera, A. Lomax, W. F. Boss, and N. Moran
Phosphatidylinositol (4,5)Bisphosphate Inhibits K+-Efflux Channel Activity in NT1 Tobacco Cultured Cells
Plant Physiology, February 1, 2009; 149(2): 1127 - 1140.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
J. Trouverie, G. Vidal, Z. Zhang, C. Sirichandra, K. Madiona, Z. Amiar, J.-L. Prioul, E. Jeannette, J.-P. Rona, and M. Brault
Anion Channel Activation and Proton Pumping Inhibition Involved in the Plasma Membrane Depolarization Induced by ABA in Arabidopsis thaliana Suspension Cells are Both ROS Dependent
Plant Cell Physiol., October 1, 2008; 49(10): 1495 - 1507.
[Abstract] [Full Text] [PDF]

Home page
 Mol PlantHome page
A. Wasilewska, F. Vlad, C. Sirichandra, Y. Redko, F. Jammes, C. Valon, N. F. d. Frey, and J. Leung
An Update on Abscisic Acid Signaling in Plants and More ...
Mol Plant, March 1, 2008; 1(2): 198 - 217.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
Y. Kang, W. H. Outlaw Jr, G. B. Fiore, and K. A. Riddle
Guard cell apoplastic photosynthate accumulation corresponds to a phloem-loading mechanism
J. Exp. Bot., December 1, 2007; 58(15-16): 4061 - 4070.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 2006 by the American Society of Plant Biologists