Modeling the Calcium Signaling in Stomatal Guard Cells under the Action of Abscisic Acid

Modeling the Calcium Signaling in Stomatal Guard Cells under the Action of Abscisic Acid A theoretical model of calcium signaling is presented that simulates oscillations of cytoplasmic calcium concentration ([Ca2+]cyt) in stomatal guard cells under the action of abscisic acid. The model is based on the kinetics of inositol 1,4,5-trisphosphate-sensitive calcium channels of endoplasmic reticulum and cyclic ADP-ribose-sensitive calcium channels of the tonoplast. The operation of two energy-dependent pumps—the Ca2+-ATPase of the endoplasmic reticulum and the Ca2+/H+ antiporter of the tonoplast—is also included in the model. It is shown that the removal of excessive Ca2+ from the cytoplasm by the tonoplast Ca2+/H+ antiporter is the main factor accounting for generation of [Ca2+]cyt oscillations at a wide range of ABA concentrations (0.01–1 μM). The long period of [Ca2+]cyt oscillations in plant cells is explained by a slow release from inhibition of inositol 1,4,5-trisphosphate-gated calcium channels. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Modeling the Calcium Signaling in Stomatal Guard Cells under the Action of Abscisic Acid

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1025686603389
Publisher site
See Article on Publisher Site

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