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https://doi.org/10.1007/bf01275804
Copy DOIJournal: Protoplasma | Publication Date: Dec 1, 1979 |
Citations: 23 |
The effect of electrolytes on the speed of locomotion of amoebae on glass coverslips was studied in a perfusion chamber. The intervening gap between the ventral surface of the cell and the glass substrate in the various solutions was also studied by means of reflexion interference microscopy. It was found that the presence of electrolyte increased the speed of movement,e.g., the amoebae moved almost four times faster in 10 mM KCl than in deionized water. The ventral surface of the amoebae was brought closer to the substrate when increasing amounts of electrolyte were present in the medium. This two fold effect was fully reversible by replacement of electrolyte with deionized water. Solutions of the non-electrolytes sucrose or urea did not affect the behaviour of the amoebae with respect to their speed of movement or cell-substrate separation distance compared with that observed in deionized water. Thus we have demonstrated a direct relationship between the speed of amoeboid cell locomotion and the closeness of the cell to the substrate.
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