SUMMARY: Multiplication of aerobic piliated fla and fla growing in aerated mixed culture gave fla:fla ratios approximately 1:1 over a 24 hr growth period. When fla and fla were cultured simultaneously in non-aerated media, fla then outgrew the fla mutant to a final (24 hr) ratio of 10:1 or greater, thereby lending supporting evidence to the view that motility is a survival factor in environments where ‘nutrients’ are limited or discontinuous.

Gravity, magnetism, and light did not influence a negative chemotactic response of fla to hydrogen ions. Temperature variations, pH, or viscosity alterations either inhibited or stimulated motility, thereby making impossible a determination of their specific effects. Various antibiotics, membrane-active agents, and protein or DNA synthesis inhibitors were employed in attempts to interfere with the chemotactic response, but none completely inhibited chemotaxis without also affecting motility. The cytoplasmic membrane may act as a transducer of environmental stimuli in chemotaxis.


Article metrics loading...

Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error