Simulation of Variation Potential in Higher Plant Cells

Simulation of Variation Potential in Higher Plant Cells Variation potential (VP), a propagating electrical signal unique to plants, induces a number of changes in many physiological processes. However, the mechanisms of its generation and propagation are still under discussion and require experimental and theoretical analysis, including VP simulations. The mathematical model for VP formation in plants has been worked out and is based on our previous description of electrophysiological processes in higher plant cells, including plasma membrane ion transport systems (K+, Cl− and Ca2+ channels, H+ and Ca2+-ATPase, 2H+/Cl− symporter and H+/K+ antiporter) and their regulation, ion concentration changes in cells and extracellular spaces and buffers in cytoplasm and apoplast. In addition, the VP model takes into account wound substance diffusion, which is described by a one-dimensional diffusion equation, and ligand-gated Ca2+ channels, which are activated by this substance. The VP model simulates the experimental dependence of amplitude, velocity and shape of VP on the distance from the wounding site and describes the influence of metabolic inhibitors, divalent cation chelators and anion channel blockers on the generation of this electrical reaction, as shown in experiments. Thus, our model favorably simulates VP in plants and theoretically supports the role of wound substance diffusion and Ca2+ influx in VP development. The Journal of Membrane Biology Springer Journals

Simulation of Variation Potential in Higher Plant Cells

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Copyright © 2013 by Springer Science+Business Media New York
Life Sciences; Biochemistry, general; Human Physiology
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