Cell division and reformation of the amphiesma in the pelliculate dinoflagellate, Heterocapsa niei

Cytokinesis is described for the first time in a pelliculate dinoflagellate that retains its thecal plates during cell division. In Heterocapsa niei cytokinesis proceeded in a manner that differed from that described for other dinoflagellates. The thecal plates separated along the fission line befor...

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Bibliographic Details
Published in:Journal of the Marine Biological Association of the United Kingdom 1984-11, Vol.64 (4), p.939-953
Main Authors: Morrill, Lenitac, Loeblich, Alfred R.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cell kinetics
Cell physiology
Fundamental and applied biological sciences. Psychology
Heterocapsa niei
Marine
Plant physiology and development
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Summary:Cytokinesis is described for the first time in a pelliculate dinoflagellate that retains its thecal plates during cell division. In Heterocapsa niei cytokinesis proceeded in a manner that differed from that described for other dinoflagellates. The thecal plates separated along the fission line before the development of a cleavage furrow. A distinct cleavage furrow developed as cytokinesis progressed. The outer membrane and the outer plate membrane expanded during division to enclose the enlarging cell undergoing cytokinesis; however, as the cleavage furrow deepened, these membranes were not continuous with the cytoplasm. The pellicle was occasionally intermittent in the region of the cleavage furrow, possibly facilitating movement of material from the cytoplasm to the developing outer membranes. Thecal plate formation occurred within the thecal vesicle from unrecognizable precursors.
ISSN:0025-3154
1469-7769
DOI:10.1017/S0025315400047354