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Involvement of Divalent Cations in Maintaining Cell Membrane Integrity in Stressed Apple Fruit Tissues
Year:
1986
Source of publication :
Journal of Plant Physiology
Authors :
Nur, Talia
;
.
Volume :
125
Co-Authors:
Nur, T., ARO, Volcani Center, Bet Dagan, 50250, Israel
Ben-Arie, R., ARO, Volcani Center, Bet Dagan, 50250, Israel
Altman, A., Department of Horticulture, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, 76100, Israel
Facilitators :
From page:
47
To page:
60
(
Total pages:
14
)
Abstract:
The effects of divalent cations on the response of apple fruit tissue to accelerated ageing, temperature stress, or osmotic stress, were evaluated by measuring ethylene evolution, electrolyte leakage, and membrane microviscosity. Apple tissue slices, incubated in an isotonic sorbitol solution at 25°C for 24 hours, underwent rapid ageing, as expressed by a sharp drop in ethylene production (70–90%)and leakage of potassium from the tissue. At a higher temperature and in hypotonic medium these symptoms were accelerated and enhanced. Addition of Ca2+ to the isotonic incubation medium inhibited ethylene production during the first 6 hours but thereafter partially prevented the drop in ethylene production that took place in the aged tissue slices, and completely prevented K+ leakage beyond 4 hours of incubation. The influence of Ca2+ on the physical state of the membranes was observed by an increase in membrane microviscosity relative to control, as determined by the fluorescence depolarization technique. Using fluorescent probes that bind to different sites in the membrane, it was found that the effect of Ca2+ was more pronounced at the membrane surface and diminished toward the hydrophobic region of the membrane bilayer. © 1986, Gustav Fischer Verlag, Stuttgart. All rights reserved.
Note:
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More details
DOI :
10.1016/S0176-1617(86)80242-5
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21535
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:44
Scientific Publication
Involvement of Divalent Cations in Maintaining Cell Membrane Integrity in Stressed Apple Fruit Tissues
125
Nur, T., ARO, Volcani Center, Bet Dagan, 50250, Israel
Ben-Arie, R., ARO, Volcani Center, Bet Dagan, 50250, Israel
Altman, A., Department of Horticulture, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, 76100, Israel
Involvement of Divalent Cations in Maintaining Cell Membrane Integrity in Stressed Apple Fruit Tissues
The effects of divalent cations on the response of apple fruit tissue to accelerated ageing, temperature stress, or osmotic stress, were evaluated by measuring ethylene evolution, electrolyte leakage, and membrane microviscosity. Apple tissue slices, incubated in an isotonic sorbitol solution at 25°C for 24 hours, underwent rapid ageing, as expressed by a sharp drop in ethylene production (70–90%)and leakage of potassium from the tissue. At a higher temperature and in hypotonic medium these symptoms were accelerated and enhanced. Addition of Ca2+ to the isotonic incubation medium inhibited ethylene production during the first 6 hours but thereafter partially prevented the drop in ethylene production that took place in the aged tissue slices, and completely prevented K+ leakage beyond 4 hours of incubation. The influence of Ca2+ on the physical state of the membranes was observed by an increase in membrane microviscosity relative to control, as determined by the fluorescence depolarization technique. Using fluorescent probes that bind to different sites in the membrane, it was found that the effect of Ca2+ was more pronounced at the membrane surface and diminished toward the hydrophobic region of the membrane bilayer. © 1986, Gustav Fischer Verlag, Stuttgart. All rights reserved.
Scientific Publication
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