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Titre du document / Document title

Regional differentiation of cortical structures and their reorganization during cell division in Paramecium trichium

Auteur(s) / Author(s)

TAKAHASHI T. (1) ; OKUBO M.-A. (1) ; HOSOYA H. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Biological Science, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, JAPON

Résumé / Abstract

We observed the cell surface of Paramecium trichium using three different methods. A non-dividing paramecium's cell surface consisted of three major regions outside of the oral apparatus: a) an oral groove region, with 2-cilia-2-basal-body (2C-2BB) units; b) a posterior region, occupying 1/4 to 1/5 of the cell surface, with l-cilium-1-basal-body (1C-1BB) units; c) the remainder, with 1 -cilium-2-basal-body (1C-2BB) units. Five kinds of region-specific cortical reorganization occurred prior to cytokinesis: the 2C-2BB and 1C-1BB units were not duplicated, while the 1C-2BB units were reorganized to 2C-2BB, 1C-2BB or 1C-1BB units. These reorganizations of the cell surface progressed from the fission line to the anterior in the prospective anterior daughter cell, and to the posterior in the prospective posterior daughter cell, and bilaterally from the old and also newly developing oral apparatus in both daughter cells. In contrast, the development of cilia and their associated structures in each of the cortical units always progressed from posterior to anterior. The present work also showed that two fission lines began to develop bilaterally from the oral primordium, and then they joined to become a single fission line at the dorsal surface.

Revue / Journal Title

The Journal of eukaryotic microbiology    ISSN  1066-5234   CODEN JEMIED 

Source / Source

1998, vol. 45, no4, pp. 369-380 (31 ref.)

Langue / Language

Anglais

Editeur / Publisher

Wiley, Hoboken, NJ, ETATS-UNIS  (1993) (Revue)

Mots-clés anglais / English Keywords

Differentiation

;

Molecular rearrangement

;

Cortical granulation

;

Cell surface

;

Cell division

;

Morphology

;

Scanning electron microscopy

;

Ciliata

;

Protozoa

;

Mots-clés français / French Keywords

Différenciation

;

Réarrangement moléculaire

;

Granulation corticale

;

Surface cellulaire

;

Division cellulaire

;

Morphologie

;

Microscopie électronique balayage

;

Paramecium trichium

;

Ciliata

;

Protozoa

;

Mots-clés espagnols / Spanish Keywords

Diferenciación

;

Recombinación molecular

;

Granulación cortical

;

Superficie celular

;

División celular

;

Morfología

;

Microscopía electrónica barrido

;

Ciliata

;

Protozoa

;

Localisation / Location

INIST-CNRS, Cote INIST : 8265, 35400007266076.0010

Nº notice refdoc (ud4) : 2423773



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