ACKNOWLEDGMENTS
We thank Prof. Dr. Hubert Felle for his permanent willingnessto constructive discussions and critical reading of the manuscript,Dr. Martin Fronius for the supply of the patch-clamp equipmentand expert technical advice, Prof. Dr. Wolfgang Clauss (Instituteof Animal Physiology, JLU Giessen) for the hospitality in hisinstitute, Kai Konrad and Prof. Dr. Rainer Hedrich (Julius-von-SachsInstitute for Biosciences, University of Würzburg) forhelpful comments on patch-clamp studies, and Tina Henrich fordedicated technical assistance.
Received July 24, 2007; accepted September 15, 2007; published September 20, 2007.
FOOTNOTES
1 This work was supported by the Deutsche Forschungsgemeinschaftin the frame of Schwerpunktprogramm 1108 (BE 1925/8–2).
The author responsible for distribution of materials integralto the findings presented in this article in accordance withthe policy described in the Instructions for Authors (www.plantphysiol.org)is: Jens B. Hafke (jens.hafke@bot1.bio.uni-giessen.de ).
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* Corresponding author; e-mail aart.v.bel@bot1.bio.uni-giessen.de .