| Structural and ultrastructural characterization of zebu (Bos indicus) spermatozoa. | |
| | |
MedLine Citation:
|
PMID: 16845826 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The ultrastructure of normal, ejaculated spermatozoa of Bos indicus was studied by means of electron microscopy, being evaluated in two principal parts, the head and the tail. The head is flat, oval or paddle-shaped with a square base, which provides a concave recess for the insertion of the tail. The acrosome tightly covers the anterior two thirds of the nucleus. A distinct unilateral acrosomal bulge was observed along the apical edge of the head. The equatorial region demarcates the acrosome from the post-equatorial region that covers the caudal one third of the nucleus. The classical 9+9+2 fiber pattern which composes the axoneme was observed along three segments of the tail, namely middle, principal and terminal pieces. The axoneme is anteriorly bound by the mitochondrial helix (middle piece) and posteriorly by the fibrous helix (principal piece), except at the terminal piece. The border between the middle piece and principal piece was well defined due to the termination of the thick mitochondrial helix and the presence of the annulus. Some of the spermatozoa presented cytoplasmatic droplets, which appeared as stalk-like appendages. |
| | |
Authors:
|
Maria Carolina Aquino Luque; Sonia Nair Báo |
Related Documents
:
|
21090516 - The effect of parity and gravidity on the outcome of medical termination of pregnancy. 15229006 - Factors influencing parental decision making in prenatal diagnosis of sex chromosome an... 3208966 - Termination of early pregnancy by a single dose of mifepristone (ru 486), a progesteron... 16913556 - Uterine perforation as a rare complication of attempted pregnancy termination with miso... 2331296 - Botulinic toxin detection by counterimmunoelectrophoresis. 7360446 - First trimester molar pregnancy: nonspecific ultrasonographic appearance. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Biocell : official journal of the Sociedades Latinoamericanas de Microscopía Electronica ... et. al Volume: 30 ISSN: 0327-9545 ISO Abbreviation: Biocell Publication Date: 2006 Apr |
Date Detail:
|
Created Date: 2006-07-18 Completed Date: 2006-08-25 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 9438655 Medline TA: Biocell Country: Argentina |
Other Details:
|
Languages: eng Pagination: 33-8 Citation Subset: IM |
Affiliation:
|
Laboratório de Microscopia Eletrônica, Departamento de Biologia Celular, Instituto de Ciências Biológicas, UnB, Brasília DF 70919-970, Brasil. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Cattle / anatomy & histology* Male Microscopy, Electron Spermatozoa / ultrastructure* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Visualization of the ribosomal DNA (45S rDNA) of Indica rice with FISH on some phases of cell cycle ...
Next Document: Synergism of flavonoids with bacteriostatic action against Staphylococcus aureus ATCC 25 923 and Esc...