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Cytodifferentiation during spermiogenesis in Lumbricus terrestris.
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MedLine Citation:
PMID:  10976199     Owner:  NLM     Status:  MEDLINE    
The structural changes during spermiogenesis were studied on developing spermatids in seminal vesicles and receptacles of Lumbricus terrestris fixed in glutaraldehyde-osmium tetroxide and embedded in Epon-Araldite. The centriole plays a prominent role in the morphogenesis and organization of the microtubules of the manchette and flagellum. Microtubules arising from the centriole extend anteriorly to encase the developing middle piece, the nucleus, and the acrosome. The manchette not only provides a supporting framework for the cell during elongation, but also may provide the motive force for the elimination of both nucleoplasm and cytoplasm. The manchette participates in segregation and elimination of the nuclear vesicle that contains the nonchromatin nucleoplasm. Compartmentalization and conservation may also be a function of the manchette since those elements which remain within the framework of microtubules are retained, while all the cytoplasm outside the manchette is discarded. At maturation, the endoplasmic reticulum plays a key role in dismantling the manchette and reducing the cytoplasm external to it. During the early stages of middle-piece formation, six ovoid mitochondria aggregate at the posterior pole of the spermatid nucleus. Concurrent with manchette formation, the mitochondria are compressed laterally into elongate wedge-shaped components, and their outer limiting membranes fuse to form an hexagonal framework that surrounds the dense intramitochondrial matrices. Dense glycogen granules are arranged linearly between the peripheral flagellar tubules and the outer membrane of the mature sperm tail.
W A Anderson; A Weissman; R A Ellis
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of cell biology     Volume:  32     ISSN:  0021-9525     ISO Abbreviation:  J. Cell Biol.     Publication Date:  1967 Jan 
Date Detail:
Created Date:  2000-09-14     Completed Date:  2000-09-14     Revised Date:  2010-06-22    
Medline Journal Info:
Nlm Unique ID:  0375356     Medline TA:  J Cell Biol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  11-26     Citation Subset:  IM    
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MeSH Terms
Cell Differentiation / physiology
Cell Nucleus / physiology,  ultrastructure
Cytoplasm / physiology,  ultrastructure
Endoplasmic Reticulum / physiology,  ultrastructure
Flagella / chemistry,  physiology,  ultrastructure
Glycogen / analysis
Microscopy, Electron
Oligochaeta / ultrastructure*
Osmium Tetroxide
Spermatids / cytology*,  ultrastructure*
Spermatogenesis / physiology*
Reg. No./Substance:
0/Fixatives; 111-30-8/Glutaral; 20816-12-0/Osmium Tetroxide; 9005-79-2/Glycogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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Journal Information
Journal ID (nlm-ta): J Cell Biol
ISSN: 0021-9525
ISSN: 1540-8140
Publisher: The Rockefeller University Press
Article Information
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Copyright © 1967 by The Rockefeller University Press
Received Day: 12 Month: 5 Year: 1966
Print publication date: Day: 1 Month: 1 Year: 1967
Volume: 32 Issue: 1
First Page: 11 Last Page: 26
ID: 2107096
PubMed Id: 10976199

W. A. Anderson
A. Weissman
R. A. Ellis
From the Division of Biological and Medical Sciences, Brown University, Providence, Rhode Island

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