The mutual effect of extracellular Ca2+, abscisic acid, and pH on the rate of stomatal closure
Abstract
An analysis of the rate of stomatal closure in epidermal strips of Commelina communis L. induced by different calcium concentrations (10 nM to 1 mM) demonstrated a biphasic dependency, the initial process of closure being more calcium dependent. This dependency was more evident at pH 7 than pH 5 of the bathing medium. Addition of low concentrations of abscisic acid (10 nM) induced a broadening of the Ca-2 dependency, while 10 mu M abscisic acid increased the rate of stomatal closure in the whole Ca2+ range and to a large extent abolished the calcium-induced effects. Such results indicate an interaction of external protons, Ca2+, and abscisic acid, and possible competition for the membrane associated binding sites of the mechanism(s) responsible for the regulation of stomatal closure.
Keywords:
stomata / abscisic acid / pH / Commelina communis L.Source:
Biophysics from Molecules to Brain: in Memory of Radoslav K. Andjus, 2005, 1048, 513-516Publisher:
- New York Acad Sciences, New York
DOI: 10.1196/annals.1342.079
ISSN: 0077-8923
PubMed: 16154989
WoS: 000233712300073
Scopus: 2-s2.0-25144436357
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Poljoprivredni fakultetTY - CONF AU - Prokić, Ljiljana AU - Jovanović, Zorica AU - Stikić, Radmila AU - Vucinić, Z PY - 2005 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/1005 AB - An analysis of the rate of stomatal closure in epidermal strips of Commelina communis L. induced by different calcium concentrations (10 nM to 1 mM) demonstrated a biphasic dependency, the initial process of closure being more calcium dependent. This dependency was more evident at pH 7 than pH 5 of the bathing medium. Addition of low concentrations of abscisic acid (10 nM) induced a broadening of the Ca-2 dependency, while 10 mu M abscisic acid increased the rate of stomatal closure in the whole Ca2+ range and to a large extent abolished the calcium-induced effects. Such results indicate an interaction of external protons, Ca2+, and abscisic acid, and possible competition for the membrane associated binding sites of the mechanism(s) responsible for the regulation of stomatal closure. PB - New York Acad Sciences, New York C3 - Biophysics from Molecules to Brain: in Memory of Radoslav K. Andjus T1 - The mutual effect of extracellular Ca2+, abscisic acid, and pH on the rate of stomatal closure EP - 516 SP - 513 VL - 1048 DO - 10.1196/annals.1342.079 ER -
@conference{ author = "Prokić, Ljiljana and Jovanović, Zorica and Stikić, Radmila and Vucinić, Z", year = "2005", abstract = "An analysis of the rate of stomatal closure in epidermal strips of Commelina communis L. induced by different calcium concentrations (10 nM to 1 mM) demonstrated a biphasic dependency, the initial process of closure being more calcium dependent. This dependency was more evident at pH 7 than pH 5 of the bathing medium. Addition of low concentrations of abscisic acid (10 nM) induced a broadening of the Ca-2 dependency, while 10 mu M abscisic acid increased the rate of stomatal closure in the whole Ca2+ range and to a large extent abolished the calcium-induced effects. Such results indicate an interaction of external protons, Ca2+, and abscisic acid, and possible competition for the membrane associated binding sites of the mechanism(s) responsible for the regulation of stomatal closure.", publisher = "New York Acad Sciences, New York", journal = "Biophysics from Molecules to Brain: in Memory of Radoslav K. Andjus", title = "The mutual effect of extracellular Ca2+, abscisic acid, and pH on the rate of stomatal closure", pages = "516-513", volume = "1048", doi = "10.1196/annals.1342.079" }
Prokić, L., Jovanović, Z., Stikić, R.,& Vucinić, Z.. (2005). The mutual effect of extracellular Ca2+, abscisic acid, and pH on the rate of stomatal closure. in Biophysics from Molecules to Brain: in Memory of Radoslav K. Andjus New York Acad Sciences, New York., 1048, 513-516. https://doi.org/10.1196/annals.1342.079
Prokić L, Jovanović Z, Stikić R, Vucinić Z. The mutual effect of extracellular Ca2+, abscisic acid, and pH on the rate of stomatal closure. in Biophysics from Molecules to Brain: in Memory of Radoslav K. Andjus. 2005;1048:513-516. doi:10.1196/annals.1342.079 .
Prokić, Ljiljana, Jovanović, Zorica, Stikić, Radmila, Vucinić, Z, "The mutual effect of extracellular Ca2+, abscisic acid, and pH on the rate of stomatal closure" in Biophysics from Molecules to Brain: in Memory of Radoslav K. Andjus, 1048 (2005):513-516, https://doi.org/10.1196/annals.1342.079 . .