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Intracytoplasmic flagellum in trypanosomatids.

R Milder¹, E P Camargo, E Freymuller

¹Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil.

European Journal of Protistology

|December 1, 2012

Summary

Certain Phytomonas flagellates possess an unusual intracytoplasmic flagellum, appearing as a naked axoneme encircling the nucleus. These atypical organisms also lack the typical flagellar pocket, a unique finding in trypanosomatids.

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Area of Science:

Cell Biology
Parasitology
Microbiology

Background:

Trypanosomatids are protozoan parasites with characteristic flagellar structures.
The genus Phytomonas infects plants and insects, with their ultrastructure being less studied than other trypanosomatids.

Purpose of the Study:

To investigate the ultrastructural morphology of flagellates within the genus Phytomonas.
To identify and characterize unusual or atypical features in the flagellar apparatus of these organisms.

Main Methods:

Electron microscopy was employed for detailed ultrastructural analysis.
Thin sectioning and detergent extraction techniques were utilized to visualize cellular components.

Main Results:

The study identified an intracytoplasmic flagellum in some Phytomonas flagellates.
This flagellum presented as a naked axoneme, encircling the nucleus before cell emergence.
A notable absence of the flagellar pocket was observed at the flagellum's emergence site.

Conclusions:

Certain Phytomonas species exhibit unique flagellar arrangements not previously described in trypanosomatids.
The absence of a flagellar pocket suggests novel mechanisms for flagellar function or cell interaction in these atypical flagellates.