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The Role of Plasmodesmata in the Electrotonic Transmission of Action Potentials

  • Roger M. Spanswick
Chapter

Abstract

The mounting evidence for the transmission of action potentials from cell to cell in a range of plants has exposed our lack of knowledge concerning the mechanism of transmission. While variation potentials (also known as slow wave potentials) involve chemicals released from damaged tissues and/or associated hydrodynamic changes, there is little or no evidence for the involvement of chemicals in the intercellular transmission of action potentials in plants. Plasmodesmata provide electrical connections between plant cells, as demonstrated by experiments in which current injected into one cell can produce a change in potential in a neighboring cell (electrical coupling). The evidence available to date supports a mechanism for electrotonic coupling of cells in transmission of action potentials rather than a direct transmission of excitation along the plasma membranes in the plasmodesmatal pores.

Keywords

Specific Resistance Electrical Coupling Internodal Cell Intercellular Transport Characean Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Biological and Environmental EngineeringCornell UniversityIthacaUSA

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