Motory effects of perforating peripheral cell layers ofAmoeba proteus |
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Authors: | Lucyna Grębecka |
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Affiliation: | (1) Department of Cell Biology, Nencki Institute of Experimental Biology, 3 Pasteur St., P-02093 Warsaw 22, Poland |
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Abstract: | Summary Perforation of peripheral cell layers ofA. proteus in any place provokes immediate endoplasm efflux, what supports the view that the hydrostatic pressure is higher in the cell interior than outside. The local effusion of endoplasm results in the reversal of flow in formerly advancing pseudopodia, in agreement with the pressure gradient theories of protoplasmic streaming. Amoebae with destroyed frontal zones squeeze all their endoplasm out through the breach, what disproves the frontal contraction hypothesis of amoeboid movement, but supports the concept of a general contraction of cell cortex.Study supported by the Research Project II.1 of the Polish Academy of Science. |
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Keywords: | Amoeba proteus Amoeboid movement Protoplasmic streaming Contraction |
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