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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Activity of the Electrogenic Pump in Chara corallina as Inferred from Measurements of the Membrane Potential, Conductance,
TL;DR: The effects of various inhibitors on the membrane potential, resistance, and K+ permeability of Chara corallina were measured, providing evidence that there is an electrogenic pump in the membrane as discussed by the authors.
Book ChapterDOI
Secretory Events in Gastric Mucosa
TL;DR: Identification of the presence of carbonic anhydrase, the enzyme catalyzing the reaction of CO 2 with water, may precede further elucidation of the transport processes—for example, in the shell-boring mechanism of gastropods or in the unicellular algae.
Factors affecting absorption and transport of potassium in maize roots
TL;DR: In other experiments, absorption and translocation of K + were estimated simultaneously in excised roots of young maize plants and in decapitated roots of maize plants 5 weeks old as discussed by the authors.
Journal ArticleDOI
A simple theoretical model of steady-state electrogenic transfer of reactive species across membranes. The case of Chara corallina.
TL;DR: Transfer across membranes is treated for simultaneous active pumping and passive flow of the main ionic constituents of plant cells and the role of anion inward pumping and of non-diffusible anions is emphasized.
Book ChapterDOI
Photosynthetic Electron Flow and Associated Changes in Electrical Potential and Resistance of Cytoplasmic Membranes in Green Plant Cells
TL;DR: The electrical potential of the cytoplasmic membranes of Nitella translucens and various other algal and green plant cells has been observed to respond to light absorbed and converted by the photosynthetic apparatus.
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.
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