Abstract
Quantitative measurement of positive chemotaxis inBacillus subtilis was performed by means of adaption of the procedure used in studies withEscherichia coli.
The motility ofB. subtilis was optimal in the presence of an exogeneous energy source and a nonionic detergent,e. g. Tween 80 or Brij-36.
B. subtilis is chemotactic toward the commonly occurringL-amino acids except arginine, lysine, aspartate and glutamate. No chemotactic response was observed towardD-amino acids. Threshold, optimal response and peak concentration were determined. Chemotaxis toward glutamine was optimal at pH 6-7 and a temperature of 32°C.
The maximum response toward a particular attractant was presumably influenced by the aerotactic behavior ofB. subtilis.
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Abbreviations
- O.D.600 :
-
optical density measured at 600 nm
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van der Drift, C., de Jong, M.H. Chemotaxis toward amino acids inBacillus subtilis . Arch. Microbiol. 96, 83–92 (1974). https://doi.org/10.1007/BF00590165
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DOI: https://doi.org/10.1007/BF00590165