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A Method for Measuring Chemotaxis and Use of the Method to Determine Optimum Conditions for Chemotaxis by Escherichia coli
Abstract
SUMMARY: Chemotaxis of a bacterium such as Escherichia coli is assayed by measuring the number of organisms attracted into a capillary tube containing an attractant. Rate of bacterial accumulation in capillaries and a concentration-response curve for l-aspartate taxis are presented and interpreted, and the effect of bacterial concentration is reported. Other parameters of the assay were studied, such as the volume of fluid in the capillary and the size of the capillary opening. The concentration gradient of chemical was also described. Escherichia coli chemotaxis requires EDTA to allow motility, a buffer to maintain the pH at its optimum near neutrality, and l-methionine if it cannot be synthesized. Under certain conditions there is stimulation by inorganic ions, either by K+ or, less effectively, by Na+. Chemotaxis is dependent on temperature, there being a 20-fold increase in the number of bacteria accumulating in a capillary when the temperature is raised from 20 to 30 °C.
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Cited by
Berg, H. C., & Purcell, E. M. (1977) · Biophysical Journal · doi:10.1016/s0006-3495(77)85544-6 · Cited by 1,758
Adler, J. (1975) · Annual Review of Biochemistry · doi:10.1146/annurev.bi.44.070175.002013 · Cited by 522
Self-citationA vegan or vegetarian diet substantially alters the human colonic faecal microbiota
Zimmer, J., Lange, B., Frick, J.-S., Sauer, H., Zimmermann, K., Schwiertz, A., Rusch, K., Klosterhalfen, S., & Enck, P. (2012) · European Journal of Clinical Nutrition · doi:10.1038/ejcn.2011.141 · Cited by 465
Weigert Muñoz, A., Hoyer, E., Schumacher, K., Grognot, M., Taute, K. M., Hacker, S. M., Sieber, S. A., & Jung, K. (2022) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2118227119 · Cited by 16
Metadata
- Authors
- ADLER, J.
- Venue
- Journal of General Microbiology
- Publisher
- Microbiology Society
- Published
- 1973-01-01
- Volume
- 74
- Issue
- 1
- Pages
- 77-91
- ISSN
- 0022-1287 (ISSN-L)
- OpenAlex
- W2072788975
- Cited by
- 794
- References
- 0
- FWCI
- 14.06
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: A Method for Measuring Chemotaxis and Use of the Method to Determine Optimum Conditions for Chemotaxis by Escherichia coli. https://app.cochat.ai/papers/10.1099/00221287-74-1-77
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- ADLER, J. (1973). A Method for Measuring Chemotaxis and Use of the Method to Determine Optimum Conditions for Chemotaxis by Escherichia coli. Journal of General Microbiology. https://doi.org/10.1099/00221287-74-1-77
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