Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/23790
Title: | Brachycoelium salamandrae (Frölich, 1789) (Digenea: Brachycoeliidae): ultrastructural study of spermiogenesis and the mature spermatozoon |
Author: | Bakhoum, Abdoulaye J. S. Ribas, Alexis Eira, Catarina Bâ, Cheikh Tidiane Miquel, Jordi |
Keywords: | Brachycoeliidae Brachycoelium salamandrae Digenea Gorgoderoidea Spermatozoon Spermiogenesis Ultrastructure |
Issue Date: | 2013 |
Publisher: | Elsevier |
Abstract: | Ultrastructural characters of spermiogenesis and the mature spermatozoon of Brachycoelium salamandrae are described by means of transmission electron microscopy. Spermiogenesis begins with the formation of a differentiation zone containing a nucleus, several mitochondria, and two centrioles associated with striated rootlets and with an intercentriolar body between them. The two centrioles originate two free flagella that grow orthogonally to the median cytoplasmic process before fusing with it. The final stage of spermiogenesis is characterized by a constriction of the ring of arched membranes and the liberation of the young spermatozoon. In this final stage a pear shaped electron-dense material appears at the level of centrioles. Spermatozoon of B. salamandrae exhibits two axonemes of different length with the 9+'1' trepaxonematan pattern, a nucleus, two mitochondria, two bundles of parallel cortical microtubules and granules of glycogen. Additionally, the spermatozoon of B. salamandrae shows external ornamentations of the plasma membrane and spinelike bodies. The most relevant spermatozoon characters of B. salamandrae are discussed and compared with those of other species belonging to the superfamily Gorgoderoidea. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/23790 |
DOI: | 10.1016/j.jcz.2012.05.003 |
ISSN: | 0044-5231 |
Appears in Collections: | CESAM - Artigos DBio - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Bakhoum et al. - 2013 - Brachycoelium salamandrae (Frolich, 1789) (Digenea.pdf | 3.85 MB | Adobe PDF |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.