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Electrophysiology of Stomata

  • Gerhard Thiel
  • Dietrich Gradmann
Part of the Progress in Botany/Fortschritte der Botanik book series (BOTANY, volume 55)

Abstract

The discovery in 1968 that osmotically driven movement of guard cells is correlated with substantial transport of K+ through the plasmalemma (Fisher 1968) has challenged electrophysiologists ever since; but only recent progress in tailoring the experimental conditions suitable for the use of conventional microelectrodes (Blatt 1987a, b) or application of patch-clamp techniques to guard cell protoplasts (Schroeder et al. 1984) has paved the way to studying electrical parameters of the membrane in greater detail. Today, guard cells are, for diverse reasons, the electrophysiologically best investigated cells of vascular plants. First, because stomatal physiology has always been a major topic in botany. Second, because guard cells are exceptional in that they have no cytoplasmic contact to adjacent cells (Wille and Lucas 1984). This provides the researcher with the desired system of an electrically isolated cell and makes guard cells most suitable for both physiological and biophysical studies. Finally, for patch-clamp investigations, guard cells offer another benefit: the small protoplasts can be easily distinguished from the mass of cells from other tissues.

Keywords

Guard Cell Outward Current Anion Channel Membrane Voltage Guard Cell Protoplast 
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 1994

Authors and Affiliations

  • Gerhard Thiel
    • 1
  • Dietrich Gradmann
    • 1
  1. 1.Pflanzenphysiologisches Institutder Universität Untere Karspüle 2GöttingenGermany

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