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. 1977 Jul;131(1):306–313. doi: 10.1128/jb.131.1.306-313.1977

Morphology and ultrastructure of Crenothrix polyspora Cohn.

H Völker, R Schweisfurth, P Hirsch
PMCID: PMC235423  PMID: 873887

Abstract

Naturally grown cell material of Crenothrix polyspora from the well of a waterworks was studied by means of phase-contrast and Nomarski interference microscopy as well as by transmission electron microscopy. The material consisted of clusters of sheathed filaments up to 2 cm long. Propagation forms observed were nonmotile, spherical cells that arose by simple ("macrogonidia") or multiple ("microgonidia") septation of the filamental tips. Ultrastructural analysis revealed Crenothrix to be procaryotic and gram negative, with several layers of sheath material surrounding the filaments. On thin sections, individual cells had elaborate membrane systems in the form of lamellar stacks. They resembled thylakoids of photosynthetic bacteria. Spectrophotometric analysis gave no indication of photosynthetic pigments. The cells also contained large hexagonal bodies, rod-shaped fibrillar elements, and polyphosphate granules.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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