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Journal of Cell Science, Vol 9, 581-601, Copyright © 1971 by Company of Biologists

Submitted on February 22, 1971
Revised on May 13, 1971

Fine Structure of Swarmers of Cladophora and Chaetomorpha

I. The Plasmalemma and Golgi Apparatus in Naked Swarmers

D. G. ROBINSON 1 and R. D. PRESTON 1

1 Astbury Department of Biophysics, The University of Leeds England

Naked swarmers of both Cladophora rupestris and Chaetomorpha melagonium have been examined by the freeze-etching technique. The swarmers of Cladophora, collected just after settling, reveal several layers of granules external to the plasmalemma and internal to the so-called ‘fibrous-layer’. Chaetomorpha swarmers collected just before settling show extrusion of vesicles through the plasmalemma. The structures associated with the membranes are discussed in relation to known features of these swarmers already observed by sectioning. The role of granules in the synthesis of cell wall microfibrils is strengthened though the spatial arrangement of the granules seen in this investigation does not completely fulfil the ‘ordered granule’ hypothesis.

Description of, and comments on, features related to cell wall synthesis, particularly the Golgi and vacuolar systems, are given.

Submitted on February 22, 1971
Revised on May 13, 1971




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J. Ruiz-Herrera and S. Bartnicki-Garcia
Synthesis of Cell Wall Microfibrils in vitro by a "Soluble" Chitin Synthetase from Mucor rouxii
Science, October 25, 1974; 186(4161): 357 - 359.
[Abstract] [PDF]


© The Company of Biologists Ltd 1971