Osmotically Induced Changes in Electrical Properties of Plant Protoplast Membranes

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Science  28 Oct 1977:
Vol. 198, Issue 4315, pp. 405-407
DOI: 10.1126/science.198.4315.405


The internal electrical potential of protoplasts from six different plant species was positive. Plasmolyzed cells of leaves had positive voltages of similar magnitude. Both Elodea leaf cells and tobacco protoplasts with regenerated cell walls became more electronegative during deplasmolysis. These findings suggest that cell turgor affects membrane components that determine cellular potential.