Document Detail

The nature of control of oral development by the micronucleus in sexual reproduction of Paramecium tetraurelia.
MedLine Citation:
PMID:  23195213     Owner:  NLM     Status:  In-Data-Review    
Twelve laser-irradiated cell lines and eight cis. platin-treated cultures possessing defective micronuclei exhibited micronuclear and oral abnormalities during autogamy. Micronuclear abnormalities were characterized by the failure of some of the cells to complete the micronuclear cycle resulting in the absence of either micronuclei or macronuclear anlagen, or both. Oral abnormalities included reduction in the length of the buccal cavity and oral membranelles, abnormal oral membranellar patterns and arrest of oral development at early and late stages. The present study demonstrated a close relationship between micronuclear and stomatogenic abnormalities during sexual reproduction. It is concluded that the micronucleus plays an important role in the specification of a normal oral pattern during sexual reproduction. The participation of postzygotic micronuclear activities in the control of sexual stomatogenesis is discussed. In contrast to the situation in sexual reproduction, the development of the oral apparatus was normal during asexual propagation of the cell lines possessing defective micronuclei. This paradoxical situation forms the basis of speculations on the nature of micronuclear control of oral development in sexual reproduction. It is probable that micronuclear genes are involved.
M F Chau; S F Ng
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Publication Detail:
Type:  Journal Article     Date:  2011-11-02
Journal Detail:
Title:  European journal of protistology     Volume:  23     ISSN:  0932-4739     ISO Abbreviation:  Eur. J. Protistol.     Publication Date:  1988 Jul 
Date Detail:
Created Date:  2012-11-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8917383     Medline TA:  Eur J Protistol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  248-57     Citation Subset:  -    
Copyright Information:
Copyright © 1988 Gustav Fischer Verlag · Stuttgart · New York. Published by Elsevier GmbH.. All rights reserved.
Zoology Department, University of Hong Kong, Hong Kong.
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