Abstract
The relative strength of attachment to the walls of a glass capillary displayed by Naegleria gruberi amoebae during locomotion under different electrolyte conditions was measured. The proportion of initially adherent cells remaining attached to the capillary after 10 ml of defined solution which had previously been shown to modulate the speed of locomotion and cell-substrate gap distance, was then determined. It was found that an inverse relationship existed between the strength of cell-substrate adhesion and the cell-substrate separation distance. When locomotion speeds were considered it was found that an optimal level of cell-substrate adhesion occurred for maximal cell motility (e.g. in 10 mM NaCl). However locomotion rates of about 30% of this value were found in media producing low adhesivity (i.e. deionized H 2O) or very high adhesivity (i.e. polylysine solutions).
Published Version
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