spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by DALLAI, R.
Right arrow Articles by TALLURI, M. V.
Right arrow Search for Related Content
PubMed
Right arrow Articles by DALLAI, R.
Right arrow Articles by TALLURI, M. V.

Journal of Cell Science, Vol 89, 217-224, Copyright © 1988 by Company of Biologists

Submitted on September 28, 1987
Accepted on November 26, 1987

Evidence for septate junctions in the syzygy of the protozoon Gregarina polymorpha (Protozoa, Apicomplexa)

ROMANO DALLAI 1 and MARIA VEGNI TALLURI 1

1 Department of Evolutionary Biology, University of Siena Via Mattioh 4, 53100 Siena, Italy

A septate junction is described in reproductive pairs of the protozoon Gregarina polymorpha, using conventional thin sections, lanthanum tracer and freeze-fracture techniques. The septate junction is established between the plasma membranes at the tips of the joined epicytic folds. It is characterized by an intercellular space of 14-17 nm traversed by septa with a repeat of 15-25 nm. Lanthanum-treated material exhibits transparent curves forming a meshwork. Freeze-fracture replicas show membrane modifications in the shape of short rows of intramembranous particles on the E fracture face of the plasma membrane. The significance of the finding of such a septate junction between protozoan cells is discussed.

Key words: cell-to-cell contact, Gregarina syzygy, septate junction, Protozoa

Submitted on September 28, 1987
Accepted on November 26, 1987






© The Company of Biologists Ltd 1988