Short communication. Abscisic acid is not necessarily required for the induction of patchy stomatal closure |
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| Authors: | Eckstein J; Artsaenko O; Conrad U; Peisker M; Beyschlag W |
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| Institution: | Julius-von-Sachs-Institut fur Biowissenschaften, Lehrstuhl fur Botanik II, Mittlerer Dallenbergweg 64, D-97082 Wurzburg, Germany; Institut fur Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse 3, D-06466 Gatersleben, Germany; Lehrstuhl fur Experimentelle Okologie und Okosystembiologie, Universitatsstrasse 25, D-33615 Bielefeld, Germany; Corresponding author and correspondence address; Fax: +49 521 106 6038 |
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| Abstract: | Patchy stomatal closure was observed in leaves of transgenic plants of
Nicotiana plumbaginifolia producing antibodies that
block the action of abscisic acid. Stomatal patchiness was induced by leaf
detachment and subsequent water loss. Stomatal closure was followed by an
irreversible reduction of maximal chlorophyll fluorescence. The degree of
deviation from the A/ci-curve is correlated with steady-state diffusion
conductance before leaf detachment. It is concluded that a heterogeneous
sensitivity of stomata to abscisic acid is not directly involved in the
induction of patchy stomatal closure.Keywords:
Abscisic acid, chlorophyll fluorescence imaging, patchy stomatal
closure, Nicotiana plumbaginifolia.
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