Skip Navigation



JXB Advance Access published online on January 5, 2006
Journal of Experimental Botany, doi:10.1093/jxb/erj057
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrowOA All Versions of this Article:
57/3/675    most recent
erj057v1
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 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 Disclaimer
Google Scholar
Right arrow Articles by Prokic, L.
Right arrow Articles by Stikic, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Prokic, L.
Right arrow Articles by Stikic, R.
Agricola
Right arrow Articles by Prokic, L.
Right arrow Articles by Stikic, R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author [2006]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. The online version of this article has been published under an Open Access model. Users are entitled to use, reproduce, disseminate, or display the Open Access version of this article for non-commercial purposes provided that: the original authorship is properly and fully attributed; the Journal and the Society for Experimental Biology are attributed as the original place of publication with the correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated. For commercial re-use, please contact: journals.permissions@oxfordjournals.org
Received September 8, 2005
Accepted November 11, 2005

RESEARCH PAPER

Species-dependent changes in stomatal sensitivity to abscisic acid mediated by external pH

Ljiljana Prokic 1 *, Zorica Jovanovic 1, Martin R. McAinsh 2, Zeljko Vucinic 3, and Radmila Stikic 1

1 Department of Agrochemistry and Plant Physiology, Faculty of Agriculture, Nemanjina 6, Zemun 11080 Belgrade, Serbia and Montenegro
2 Department of Biological Science, Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
3 Center for Multidisciplinary Studies, Kneza Viseslava 1a, Belgrade, Serbia and Montenegro

* To whom correspondence should be addressed.
Ljiljana Prokic, E-mail: ljprokic{at}agrifaculty.bg.ac.yu


  Abstract

The direct effects of pH changes and/or abscisic acid (ABA) on stomatal aperture were examined in epidermal strips of Commelina communis L. and Arabidopsis thaliana. Stomata were initially opened at pH 7 or pH 5. The stomatal closure induced by changes in external pH and/or ABA (10 µM or 10 nM) was monitored using video microscopy and quantified in terms of changes in stomatal area using image analysis software. Measurements of aperture area enabled stomatal responses and, in particular, small changes in stomatal area to be quantified reliably. Both plant species exhibited a biphasic closure response to ABA: an initial phase of rapid stomatal closure, followed by a second, more prolonged, phase during which stomata closure proceeded at a slower rate. Changes in stomatal sensitivity to ABA were also observed. Comparison of these effects between C. communis and A. thaliana demonstrate that this differential sensitivity of stomata to ABA is species-dependent, as well as being dependent on the pH of the extracellular environment.

Keywords: ABA; aperture area; Arabidopsis thaliana; Commelina communis; pH; stomatal closure.
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




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.