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Journal of Cell Science, Vol 96, 617-630, Copyright © 1990 by Company of Biologists

Submitted on April 5, 1990
Accepted on May 8, 1990

Domain-specific changes of ciliary striated rootlets during the cell cycle in the hypotrich ciliate Paraurostyla weissei

MARIA JERKA-DZIADOSZ 1

1 Centre de Ginitique Moleculaire, Centre National de la Recherche Scientifique, 91198 Gif-sur-Yvette Cedex, France and M. Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw, Poland

Address for correspondence: M. Nencki Institute, Pasteur Str. 3, 02-093 Warsaw, Poland

The dynamics of striated ciliary rootlets (cr) during development of ciliary structures in cells of the hypotrich ciliate Paraurostyla weissei was studied by immunostaining with polyclonal antibody raised against isolated cr of Paramecium tetraurelia. Wildtype cells and two mutants: mlm/pl showing multiple left marginal cirri and mlm/pl showing in addition a certain degree of pattern lability were used to study the boundaries of particular cortex domains.

In interphase cells, cr are attached to all left marginal and caudal cirri and to only the posterior third of the right marginal cirri, cr appear in all nonoral primordia during the first wave of basal body proliferation. After nucleation and early elongation of cr, some cr undergo site-specific regression or stabilization. The spatial deployment of these different modes of development corresponds to specific cortical domains.

In mlm/pl mutants, where specific cortical domains are broadened, changes in the cr system are characteristic for a given domain, regardless of its broadening, but boundaries between adjacent domains are weakened.

Key words: pattern formation, ciliate, cortical domains, striated rootlets, mutants

Submitted on April 5, 1990
Accepted on May 8, 1990


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© The Company of Biologists Ltd 1990