Artikel: Short-term effects of plant hormones on membrane potential and membrane permeability of dwarf maize coleoptile cells (Zea mays L. d 1) in comparison with growth responses.
2014 Band 137, Heft 3, Seite(n) 293–298
Abstract: The membrane potential difference of dwarf maize coleoptile cells is increased by both 10(-5)moll(-1) gibberellic acid (GA3) and indoleacetic acid (IAA) a few minutes after application. A final level is reached after 10-20 min. The membrane permeability ... ...
Abstract | The membrane potential difference of dwarf maize coleoptile cells is increased by both 10(-5)moll(-1) gibberellic acid (GA3) and indoleacetic acid (IAA) a few minutes after application. A final level is reached after 10-20 min. The membrane permeability ratio P Na:P K is altered by both hormones during the first 15 min after application, indicating a rapid effect on the membrane. Elongation growth of coleoptile segments, however, is only stimulated by IAA. The auxin-induced growth as well as the auxin effect on membrane permeability depends on the calcium ion concentration of the medium. It is concluded that IAA acts via a proton extrusion pump that is electrically balanced by a potassium ion uptake, driven by the electromotive force of the pump. The mode of action of GA3 on elongation growth is assumed to involve a process that depends on the physiologic state of the tissue and/or metabolic energy. |
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Sprache | Englisch |
Erscheinungsdatum | 2014-01-13 |
Erscheinungsland | Germany |
Dokumenttyp | Journal Article |
ZDB-ID | 208909-9 |
ISSN | 1432-2048 ; 0032-0935 ; 1866-2749 |
ISSN (online) | 1432-2048 |
ISSN | 0032-0935 ; 1866-2749 |
DOI | 10.1007/BF00388165 |
Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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