Abstract
Cell surface hydrophobicity was measured in the bacterium Myxococcus xanthus during vegetative growth, fruiting body formation, and glycerol-induced spore formation by the method of Rosenberg et al. (FEMS Microbiol. Lett. 9:29-33, 1980). A significant decrease in cell surface hydrophobicity was observed 12 to 36 h after fruiting body formation and 60 to 120 min after glycerol-induced sporulation. The hydrophilic shift was correlated with the ability of the cells to sporulate but not with their ability to aggregate. Sucrose gradient purification removed the hydrophilic substance from the fruiting body spores but not from the glycerol-induced spores. The change in cell surface hydrophobicity in M. xanthus should be a useful developmental marker.
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