PMID: 4132862Mar 1, 1974Paper

An unusual mitotic mechanism in the parasitic protozoan Syndinium sp

The Journal of Cell Biology
H Ris, D F Kubai

Abstract

Syndinium and related organisms which parasitize a number of invertebrates have been classified with dinoflagellates on the basis of the morphology of their zoospores. We demonstrate here that with respect to chromosome structure and chemistry as well as nuclear division, they differ fundamentally from free-living dinoflagellates. Alkaline fast green staining indicates the presence of basic proteins in Syndinium chromosomes. Chromatin fibers are about 30 A thick and do not show the arrangement characteristic of dinoflagellate chromosomes. The four V-shaped chromosomes are permanently attached at their apexes to a specific area of the nuclear membrane through a kinetochore-like trilaminar disk inserted into an opening of the membrane. Microtubules connect the outer dense layer of each kinetochore to the bases of the two centrioles located in a pocket-shaped invagination of the nuclear envelope. During division kinetochores duplicate, and each sister kinetochore becomes attached to a different centriole. As the centrioles move apart, apparently pushed by a bundle of elongating microtubules (central spindle), the daughter chromosomes are passively pulled apart. During the process of elongation of the central spindle, the cytoplasm...Continue Reading

Citations

Jan 1, 1975·Protoplasma·J D Pickett-HeapsD H Tippit
Sep 1, 1994·International Journal for Parasitology·K Vickerman
Jul 1, 1974·Bio Systems·J D Pickett-Heaps
Jan 1, 1980·Bio Systems·F J Taylor
Jan 1, 1984·Bio Systems·J O Corliss
Oct 1, 1974·The Journal of Cell Biology·B R Oakley, J D Dodge
Feb 1, 1975·The Journal of Cell Biology·U P Roos
Dec 29, 2012·Open Biology·Hauke Drechsler, Andrew D McAinsh
Feb 1, 1976·The Journal of protozoology·A R Loeblich
Jun 30, 1975·Annals of the New York Academy of Sciences·J D Pickett-Heaps
Oct 23, 2015·Protist·Eunyoung MoonD Wayne Coats
Jan 1, 1974·Biochimie·M GourévitchJ Parello
May 12, 2004·The Journal of Eukaryotic Microbiology·Jeffrey D SilbermanAndrew J Roger
Apr 27, 2011·The Journal of Eukaryotic Microbiology·Tsvetan R BachvaroffCharles F Delwiche
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