Nonchemotactic Mutants of Escherichia coli

作者：John Borden Armstrong, Julius Adler, Margaret M. Dahl · 发表于：Journal of Bacteriology · 年份：1967 · DOI：10.1128/jb.93.1.390-398.1967 · 被引用次数：237 · 研究领域：Protist diversity and phylogeny、Molecular Communication and Nanonetworks、Micro and Nano Robotics

We have isolated 40 mutants of Escherichia coli which are nonchemotactic as judged by their failure to swarm on semisolid tryptone plates or to make bands in capillary tubes containing tryptone broth. All the mutants have normal flagella, a fact shown by their shape and reaction with antiflagella serum. All are fully motile under the microscope and all are sensitive to the phage chi. Unlike its parent, one of the mutants, studied in greater detail, failed to show chemotaxis toward oxygen, glucose, serine, threonine, or aspartic acid. The failure to exhibit chemotaxis does not result from a failure to use the chemicals. The swimming of this mutant was shown to be random. The growth rate was normal under several conditions, and the growth requirements were unchanged.