Translator Disclaimer
1 September 2000 Contributions of the Axostyle and Flagella to Closed Mitosis in the Protists Tritrichomonas foetus and Trichomonas vaginalis
Karla C. Ribeiro, Luiz Henrique Monteiro-LEAL, Marlene Benchimol
Author Affiliations +
Abstract

Tritrichomonas foetus and Trichomonas vaginalis are protists that undergo closed mitosis: the nuclear envelope remains intact and the spindle remains extranuclear. Here we show, in disagreement with previous studies, that the axostyle does not disappear during mitosis but rather actively participates in it. We document the main structural modifications of the cell during its cell cycle using video enhanced microscopy and computer animation, bright field light microscopy, confocal laser scanning microscopy, and scanning and transmission electron microscopy. We propose six phases in the trichomonad's cell cycle: an orthodox interphase, a pre-mitotic phase, and four stages during the cell division process. We report that in T. foetus and T. vaginalis: a) all skeletal structures such as the costa, pelta-axostyle system, basal bodies, flagella, and associated filaments of the mastigont system are duplicated in a pre-mitotic phase; b) the axostyle does not disappear during mitosis, otherwise playing a fundamental role in this process; c) axostyles participate in the changes in the cell shape, contortion of the anterior region of the cell, and karyokinesis; d) flagella are not under assembly during mitosis, as previously stated by others, but completely formed before it; and e) cytokinesis is powered in part by cell locomotion.

Karla C. Ribeiro, Luiz Henrique Monteiro-LEAL, and Marlene Benchimol "Contributions of the Axostyle and Flagella to Closed Mitosis in the Protists Tritrichomonas foetus and Trichomonas vaginalis," The Journal of Eukaryotic Microbiology 47(5), 481-492, (1 September 2000). https://doi.org/10.1111/j.1550-7408.2000.tb00077.x
Received: 7 October 1999; Accepted: 11 May 2000; Published: 1 September 2000
JOURNAL ARTICLE
12 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

Share
SHARE
KEYWORDS
Axostyle
cell cycle
cytoskeleton
flagella
karyokinesis
protist
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top