Abstract
With time-lapse videomicroscopy it was demonstrated that cells of Myxococcus xanthus are capable of directed (tactic) movement toward appropriate targets. Mutants that had lost A motility (J. Hodgkin and D. Kaiser, Mol. Gen. Genet. 171:177-191, 1979) were unable to show directed movement. Cells showed directed movement to polystyrene latex beads and to glass beads, as well as to clumps of Micrococcus luteus. This is consistent with other observations in an accompanying paper (M. Dworkin and D. Eide, J. Bacteriol. 154:437-442, 1983) that indicate that M. xanthus does not perceive chemical gradients.
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