Spermiogenesis and Spermatozoon Ultrastructure of the Cranial Digenean Troglotrema Acutum (Leuckart, 1842).
From: Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Spain. jordimiquel@ub.edu
The Journal of parasitology
- Publish Date: Jun 2006
- ISSN: 0022-3395
- Volume: 92
- Issue: 3
- Pages: 441-53
- Medium: Print
- Language: English
- Citation (JAMA): Miquel Jordi, Fournier-Chambrillon Christine, Fournier Pascal, et al. Spermiogenesis and Spermatozoon Ultrastructure of the Cranial Digenean Troglotrema Acutum (Leuckart, 1842).. J. Parasitol. Jun 2006;92:441-53
Abstract
Ultrastructure of spermiogenesis and the main characters of the mature spermatozoon of Troglotrema acutum are described by means of transmission electron microscopy. Specimens were obtained from the nasolacrimal sinuses of an American mink (Mustela vison). Spermiogenesis in T. acutum follows the general pattern of digeneans. The zone of differentiation is a conical-shaped area bordered by cortical microtubules and delimited at its base by a ring of arched membranes. This area contains 2 centrioles associated with striated rootlets and an intercentriolar body between them. The centrioles develop 2 free flagella that grow ortogonally to the median cytoplasmic process. The posterior flagellar rotation and proximodistal fusion of the free flagella with the median cytoplasmic process originate the spermatozoon. The mature spermatozoon of T. acutum is characterized by the presence of 2 axonemes of different lengths presenting the 9+’1’ trepaxonematan pattern, 2 bundles of parallel cortical microtubules, 2 mitochondria, a nucleus, and granules of glycogen. These ultrastructural characters are compared with other digenean species previously studied and the importance of different spermatological features is discussed.
Mesh Headings (Keywords): Animals, Female, Flagella, Male, Microscopy, Electron, Transmission, Mink, Mitochondria, Paranasal Sinuses, Spermatogenesis, Spermatozoa, Trematoda, Trematode Infections
Check for Full Text / PubMed Unique Identifier (PMID): 16883984
This abstract is part of PubMed, a service of the U.S. National Library of Medicine. PubMed includes more than 17 million citations from MEDLINE and other life science journals for biomedical articles. See Copyright and Disclaimers.
Linked medical terms appearing on this page are added by Healia to help readers find more information and are not part of the original PubMed document.
The data herein was last updated on July 8th, 2008 and may not reflect the most current and accurate data available from NLM.