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Measuring surface potential changes on leaves

Nature Protocols volume 9, pages 1997–2004 (2014)Cite this article

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Abstract

We provide here a detailed protocol for studying the changes in electrical surface potential of leaves. This method has been developed over the years by plant physiologists and is currently used in different variants in many laboratories. The protocol records surface potential changes to measure long-distance electrical signals induced by diverse stimuli such as leaf wounding or current injection. This technique can be used to determine signaling speeds, to measure the connectivity between different plant organs and—by exploiting mutant plants—to identify transporters and ion channels involved in electrical signaling. The approach can be combined with the analysis of mRNA expression and of metabolite concentrations to correlate electrical signaling to specific physiological events. We describe how to use this protocol on Arabidopsis, looking at the effects of leaf wounding; however, it is broadly applicable to other plants and can be used to study other aspects of plant physiology. After wound infliction, surface potential recording takes ∼20 min per plant.

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Figure 1: Immobilization of an Arabidopsis leaf for wounding with forceps.
Figure 2: Ground and recording electrodes.
Figure 3: Current injection into leaves.
Figure 4: Traces from a typical recording of wound-induced surface potential changes.
Figure 5: Traces illustrating technical problems.

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Acknowledgements

We thank M. Blanchard and F. Pascaud for help with the electrophysiology approaches. This research was supported by a Faculty of Biology and Medicine Interdisciplinary grant (to S.K. and E.E.F.) and by Swiss National Science Foundation grant no. 31003A-138235 (to E.E.F.).

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Authors and Affiliations

  1. Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland

    Seyed A R Mousavi, Chi Tam Nguyen & Edward E Farmer

  2. Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland

    Stephan Kellenberger

Authors
  1. Seyed A R Mousavi
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  2. Chi Tam Nguyen
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  3. Edward E Farmer
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  4. Stephan Kellenberger
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Contributions

S.A.R.M. developed the technique together with S.K. and E.E.F. and provided some figures; C.T.N. applied the technique, drafted the manuscript and provided most figures; and S.K. and E.E.F. wrote the manuscript. All authors contributed to the final manuscript.

Corresponding author

Correspondence to Stephan Kellenberger.

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The authors declare no competing financial interests.

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Mousavi, S., Nguyen, C., Farmer, E. et al. Measuring surface potential changes on leaves. Nat Protoc 9, 1997–2004 (2014). https://doi.org/10.1038/nprot.2014.136

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