Journal ArticleDOI
The active transport of ions in plant cells.
TLDR
The present review indicates the existence of similar ion transports in higher plant cells, but it does not present a complete review of the experimental work on higher plants, and tries to assess progress towards understanding the mechanisms involved.Abstract:
In a recent review of the transport of salts and water across multicellular secretory tissues in animals (Keynes, 1969), a summary was given of the various types of active transport of ions necessary to explain the experimental observations in a very wide range of tissues, and five basic types of ion pump were discussed The question of whether plants and animals have any common mechanisms for the transport of salts and water was specifically excluded The original aim of the present review was to survey the types of ion pump found in plant cells and tissues, and to compare these with those found in animals Its aims narrowed very considerably in writing It now reviews ion transport processes in giant algal cells, and tries to assess progress towards understanding the mechanisms involved It indicates the existence of similar ion transports in higher plant cells, but it does not present a complete review of the experimental work on higher plantsread more
Citations
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Book ChapterDOI
III.5 – Energy Control of Ion Fluxes in Nitella as Measured by Changes in Potential, Resistance and Current-Voltage Characteristics of the Plasmalemma
Journal ArticleDOI
A method for measuring the kinetics of energy-dependent changes in the electrical membrane resistance of metabolizing plant cells.
TL;DR: The method is described which enables the electrical potential across and the resistance of membranes of intact cells, and energy-dependent changes occurring therein, to be recorded simultaneously, and the results are not inconsistent with the hypothesis that part of the membrane potential is maintained by an electrogenic ion pump.
Journal ArticleDOI
Changes in membrane potential associated with cyclic and non-cyclic electron transport in photochemical system 1 in Nitella translucens
TL;DR: In this paper, light-driven changes in the electrical potential of cytoplasmic membranes of opposite polarity occur in single Nitella cells in the presence of DCMU with DCPIP and ascorbate, and with PMS.
Journal ArticleDOI
Chloride accumulation in plant cells as a homeostatic system: Energy supply as a dependent variable
TL;DR: The decrease in Cl− influx must be due to a negative feedback signal from internal Cl−, as previously suggested, and it is pointed out that normal energy supply must be regarded not as an independent, controlling variable, but rather as a dependent variable of the KCl accumulation system.
Book ChapterDOI
Ion Fluxes and Ion-Stimulated ATPase Activities
TL;DR: The kinetics of the KCl stimulation of this enzyme closely resembled those of ion uptake by oat roots and concluded that the dual absorption isotherm observed during ion uptake is the result of the activity of this plasmalemma enzyme.
References
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Journal ArticleDOI
Coupling of Phosphorylation to Electron and Hydrogen Transfer by a Chemi-Osmotic type of Mechanism
TL;DR: Coupling of Phosphorylation to Electron and Hydrogen Transfer by a Chemi-Osmotic type of Mechanism is described.
Journal ArticleDOI
Chemiosmotic coupling in oxidative and photosynthetic phosphorylation
TL;DR: The end result of the coupling between the flows through the o/r and h/d pathways in oxidative phosphorylation in mitochondria is that, for the equivalent of each pair of electrons traversing the respiratory chain, up to 3 anhydro-bond equivalents may normally traverse the h/D pathway from adenosine diphosphate plus inorganic phosphate (ADP +Pi) to water.
Journal ArticleDOI
The Distinction by Means of Tracers Between Active Transport and Diffusion
TL;DR: It is shown that for a free ion diffusing through a membrane the ratio between the flux in one direction and the simultaneous flux in the opposite direction is independent of the structure of the membrane.
Journal ArticleDOI
The concepts of membrane flow and membrane vesiculation as mechanisms for active transport and ion pumping.
TL;DR: The hypothesis that membrane flow may be an important part of a type of active transport mechanism carrying particles, including ions, along, within, into, and out of cells is introduced.
Related Papers (5)
Compartments and Fluxes of K, NA, and CL in Avena Coleoptile Cells.
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