PMID: 558087Apr 19, 1977Paper

Observations on the mitosis and on the chromosome evolution during the lifecycle of Oodinium, a parasitic dinoflagellate

Chromosoma
J Cachon, M Cachon

Abstract

The life cycle of the dinoflagellate Oodinium alternates between an ectoparasitic trophic phase and a phase of multiplication as free-living flagellates. The nucleus of the young ectoparasite has rod-like chromosomes similar to those of free-living dinoflagellates. As growth of the trophout proceeds the nucleus becomes increasingly homogeneous. When Oodinium leaves its host, nuclear reorganization processes occur rapidly; they correspond to a peculiar prophase of the first sporogenetic division. The following division stages are similar. A conspicuous fusorial system appears between two archoplasmic areas which are responsible for daughter-chromosome segregation. The nuclear envelope remains intact while the fusorial microtubules are attached at distinct, kinetochore-like structures onto the nucleus. As the chromosomes become more condensed the kinetochore-like formations disappear.

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Citations

Jan 1, 1985·Bio Systems·P J Rizzo
Dec 20, 2002·Biology of the Cell·Karla Consort RibeiroMarlene Benchimol
Dec 29, 2012·Open Biology·Hauke Drechsler, Andrew D McAinsh
Oct 26, 2001·Environmental Health Perspectives·J M BurkholderP J Cancellieri
Oct 23, 2015·Protist·Eunyoung MoonD Wayne Coats
Mar 9, 1990·European Journal of Protistology·E SchnepfH Quader
Jun 15, 2005·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Joseph T Y Wong, Alvin C M Kwok
Jan 31, 2019·Scientific Reports·Gregory S GavelisBrian S Leander

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