Electrical Resistance of Cell Membranes of Avena coleoptiles

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Science  27 Mar 1964:
Vol. 143, Issue 3613, pp. 1448-1449
DOI: 10.1126/science.143.3613.1448


The cell membrane resistance to direct current was measured in single cells for the first time in a higher plant tissue, oat coleoptiles (Avena sativa). On the assumption that the current density over the cell surface was uniform, a mean value of about 1300 ohm-cm2 was found for cells in an external nutrient medium containing 1 mmole each of K+, Na+, and Ca++ per liter. As expected, either decreasing K+ concentration or increasing Ca++ concentration increased the resistance.

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