Abstract
Ultrastructural studies were carried out to describe the nuclear division cycle of a strain of Encephalitozoon hellem isolated from an Italian AIDS patient. The nuclear division occurs during the proliferative vegetative phase and it is characterized by the intranuclear mitosis and by the lack of centrioles. The spindle termini are electron dense spindle plaques (ESPs), resembling to the spindle pole bodies (SPBs) of Saccharomycetes. The ESPs are bifacial organella forming microtubules on both nucleoplasmic and cytoplasmic faces. In the outer layer of the spindle plaque are present vesicular elements lined by a double membrane of unknown function. The peculiar morphological features of E. hellem ESPs indicate that both intranuclear spindle and cytoplasmic microtubules are involved in the nuclear division.
Original language | English |
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Journal | Journal of Eukaryotic Microbiology |
Volume | 44 |
Issue number | 6 |
Publication status | Published - Nov 1997 |
Keywords
- Encephalitozoon hellem
- Microsporidia
- Nuclear division
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Applied Microbiology and Biotechnology
- Agricultural and Biological Sciences (miscellaneous)
- Microbiology