Behavioral mutants of Rhizobium meliloti

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Abstract
R. meliloti exhibited behavior resembling that of other chemotactic bacteria. Nonflagellated, nonmotile but flagellated and nonchemotactic mutants were isolated, and genetic mapping placed all 3 types of lesions within a small region of the R. meliloti chromosome. Results from nodulation experiments performed with these mutants indicate that members of the 3 classes (Fla-, Mot- and Che-) infect and produce as many nodules on alfalfa plants as does the wild-type strain.

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