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Ultrastructure and behaviour of the spindle pole body of the aphid-pathogenic fungus Erynia neoaphidis.

Authors :
Butt, T.
Beckett, A.
Source :
Protoplasma; 1984, Vol. 120 Issue 1/2, p61-71, 11p
Publication Year :
1984

Abstract

A detailed account of the ultrastructure and behaviour of the spindle pole body (SPB) of the entomophthoraceous fungus Erynia neoaphidis is presented for the first time. The SPB consists of extranuclear (ENC) and intranuclear (INC) components. The ENC is a 'saucepan-shaped' structure which lies in a pocket of the nuclear envelope. It is composed of a forked, fibrillar 'handle' and a shallow, cylindrical 'pan'. The 'pan' has a wall of two layers, both of which are thickened with a regular periodicity so that they appear to be 'beaded'. It is postulated that the 'pan' is formed from rough endoplasmic reticulum and that it synthesizes the amorphous, electron-dense material coating the ENC. The INC is a 'saucer-shaped', electron-dense plaque in which the ends of the spindle microtubules terminate. During metaphase, a 'clear zone' separates the INC from the nuclear envelope and persists until telophase. The roles of the amorphous, electron-dense material and the 'clear zone' as well as the method of SPB replication are discussed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0033183X
Volume :
120
Issue :
1/2
Database :
Complementary Index
Journal :
Protoplasma
Publication Type :
Academic Journal
Accession number :
71004875
Full Text :
https://doi.org/10.1007/BF01287618