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Morphogenesis in Myxococcus xanthus and Myxococcus virescens (Myxobacterales)

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Abstract

  1. 1.

    Myxococcus xanthus B and M. virescens V2 were compared with a view to establishing the control of their morphogenetic cycles. Both organisms are typical myxococci and on solid media with low concentrations of nutrient they form fruiting bodies, within which vegetative cells convert to myxospores. Ultrathin sections of vegetative M. virescens resembled those of M. xanthus and contained prominent heavily stained bodies, presumed to be polyphosphate granules. Shadowed preparations showed fimbriae associated with M. xanthus but not with M. virescens.

  2. 2.

    M. xanthus B converted to myxospores in liquid medium in response to certain alcohols. M. virescens V2 produced phase-refractile spheres, which were not viable and had an unusual ultrastructure.

  3. 3.

    The distributions of fruiting bodies on solid media containing 0.02% Casitone were recorded for the two species and were compared with a Poisson distribution. Cells responded to differences in cell density in a manner suggestive of a response to a chemotactic attractant. Cells growing vegetatively and also cells forming fruiting bodies produced 3′,5′-cyclic adenosine monophosphate (cAMP) as measured by the incorporation of exogeneous [3H] adenosine into cAMP.

  4. 4.

    The significance of these findings for theories of fruiting body formation are discussed.

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Authors and Affiliations

  1. Department of Biochemistry, University of Leeds, 9 Hyde Terrace, LS2 9LS, Leeds, England

    J. H. Parish, K. R. Wedgwood & D. G. Herries

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  1. J. H. Parish
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  2. K. R. Wedgwood
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  3. D. G. Herries
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Parish, J.H., Wedgwood, K.R. & Herries, D.G. Morphogenesis in Myxococcus xanthus and Myxococcus virescens (Myxobacterales). Arch. Microbiol. 107, 343–351 (1976). https://doi.org/10.1007/BF00425350

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  • DOI: https://doi.org/10.1007/BF00425350

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