Abstract
Summary Using an electron microprobe, the variation of K and Cl elements in the stomatal complexes of Vicia faba and Commelina communis were followed. Our purpose was also to assess whether migrations of other elements such as Na, P, Ca, Mg and S occur during stomatal movements. Differences were found in the total ionic amount between open and closed states in the stomatal complexes and also an imbalance in ion fluxes between guard cells and epidermal cells. Tentatively, this could be explained by peristomatal transpiration mechanisms as described by Maier-Maercker.
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