"Decision"-Making in Bacteria: Chemotactic Response of Escherichia coli to Conflicting Stimuli

  title={"Decision"-Making in Bacteria: Chemotactic Response of Escherichia coli to Conflicting Stimuli},
  author={Julius Adler and Wung-wai Tso},
  pages={1292 - 1294}
Motile bacteria presented simultaneously with both attractant and repellent respond to whichever one is present in the more effective concentration. Apparently bacteria have a processing mechanism that compares opposing signals from the chemoreceptors for positive and negative taxis, sums these signals up, and then communicates the sum to the flagella. 

Data processing by the chemotaxis machinery of Escherichia coli

The properties of che mutants are summarized and a model of the chemotaxis machinery is derived based on this genetic analysis of nonchemotactic mutants of the type first described in E. coli by Armstrong et al.7.

Bacterial Chemosensing

  • M. Manson
  • Medicine
    Methods in Molecular Biology
  • 2018
This volume collates the most recent methods developed to monitor and manipulate the processes by which bacteria sense and respond to their chemical environment.

Sensory Response in Bacteria

Bacterial behavior, therefore, is a phenomenon that has many analogies to more complex behavior patterns but is contained in an extremely small living cell.

Pattern Formation On a Negative Relation between Bacterial Taxis and Turing

—In this paper we introduce a bacteria-leukocyte model with bacteria chemotaxsis. We assume that bacteria develop a tactic defence mechanism as a response to Leukocyte phagocytosis. We explore the

On a Negative Relation between Bacterial Taxis and Turing Pattern Formation

A fine tuning of bacterial chemotaxis shows a significant effect on developing a non-uniform steady state and the effect of this tactic motion on Turing space in two parameter spaces is explored.

Chemotaxis in bacteria.

  • J. Adler
  • Biology
    Annual review of biochemistry
  • 1975
The present review will restrict itself to the recent work on chemotaxis in Escherichia coli and Salmonella typhimurium.

Responses of Escherichia coli Bacteria to Two Opposing Chemoattractant Gradients Depend on the Chemoreceptor Ratio

Using a recently developed microfluidic chemotaxis device, E. coli cells are exposed to two opposing but equally potent gradients of major attractants, methyl-aspartate and serine, and responses demonstrate the importance of the cellular microenvironment in determining phenotypic behavior.

Biphasic Excitation by Leucine in Escherichia coli Chemotaxis

Wild-type E. coli bacteria were attracted in spatial assays when the initial leucine concentration difference was 5 to 120 micro M but were repulsed when it was over 0.5 mM, confirming earlier deductions regarding biphasic excitation.


Reader for advice conceming the experiments on rotation of cells. Supported by NIH grant Al-08746