Ultrastructure of a marine psychrophilic Vibrio

Authors:
  • SKS. F. Kennedy
    S. F. Kennedy
  • RCR. R. Colwell
    R. R. Colwell
  • GCG. B. Chapman
    G. B. Chapman
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Abstract
The structure of Vibrio marinus strain PS-207 was studied by both phase and electron microscopy. It was found to possess a trilaminar plasma membrane and cell wall. Membrane-bounded subunits containing DNA-like material were found dispersed throughout the cytoplasm. Giant round forms or "macrospheres" were observed in all growth stages. The size, shape, and construction of the "macrospheres" showed some variation, but could not be related to culture age. Studies of cell division in V. marinus strain PS-207 indicate the primary mechanism to be a synthesis and centripetal deposition of plasma membrane with a concomitant or subsequent synthesis and centripetal deposition of cross wall material.