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W. Kaiser, W. Hartung (1981)
Uptake and Release of Abscisic Acid by Isolated Photoautotrophic Mesophyll Cells, Depending on pH Gradients.Plant physiology, 68 1
E. Macrobbie (1981)
Ion Fluxes in ‘Isolated’ Guard Cells of Commelina communis L.Journal of Experimental Botany, 32
I. Cowan, J. Raven, W. Hartung, G. Farquhar (1982)
A Possible Role for Abscisic Acid in Coupling Stomatal Conductance and Photosynthetic Carbon Metabolism in LeavesFunctional Plant Biology, 9
Rtitter Rtitter, Willmer Willmer (1979)
A light and electron microscopy study of the epidermis of Paphiopedilum with emphasis on stomatal ultrastructurePlant, Cell and Environment, 2
Cowan Cowan, Raven Raven, Hartung Hartung, Farquhar Farquhar (1982)
A possible role for abscisic acid in coupling stomatal conductance and pliotosynthetie carbon metabolism in leavesAustralian Journal of Plant Physiology, 9
B. Heilmann, W. Hartung, H. Gimmler (1980)
The Distribution of Abscisic Acid between Chloroplasts and Cytoplasm of Leaf Cells and the Permeability of the Chloroplast Envelope for Abscisic AcidZeitschrift für Pflanzenphysiologie, 97
A. Ogunkanmi, D. Tucker, T. Mansfield (1973)
AN IMPROVED BIO‐ASSAY FOR ABSCISIC ACID AND OTHER ANTITRANSPIRANTSNew Phytologist, 72
W. Hartung, B. Heilmann, H. Gimmler (1981)
Do chloroplasts play a role in abscisic acid synthesisPlant Science Letters, 22
Abstract. Abscisic acid (ABA) is taken up by guard cells of isolated epidermata of Valerianella locusta only at low external pH values. At pH 8.0, when nearly all ABA molecules are present as the union of ABA (ABA−), no uptake can be observed. ABA‐dependent movement of stomata was tested at external pH values between 5.0 and 8.0. Independent of the external pH, ABA induced stomatal closure at all tested ABA concentrations. It is concluded that ABA need not be taken up into the cytosol of the guard cells in order to induce slomatal closure. The primary site of ABA action at the guard cell plasmalemma must be located either at the outer surface of the plasmalemma or at least be easily accessible from outside. ABA− is as effective as undissociated ABA (ABAH).
Plant Cell & Environment – Wiley
Published: Jul 1, 1983
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