Ultrastructure of spermiogenesis and the spermatozoon of Macracanthorhynchus hirudinaceus (Pallas, 1781) (Acanthocephala: Archiacanthocephala), a parasite of the wild boar Sus scrofa
| Autor: | Bernard Marchand, Julia-Laurence Culioli, Joséphine Foata |
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| Přispěvatelé: | Parasites et Ecosystèmes Méditerranéens (PEM), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), Sciences pour l'environnement (SPE), Marchand, Bernard |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
0106 biological sciences
Axoneme Male MESH: Swine Diseases Spermiogenesis Sus scrofa 01 natural sciences MESH: Spermatocytes MESH: Helminthiasis Animal Acanthocephala Spermatocytes MESH: Animals Centrioles Swine Diseases 0303 health sciences biology Spermatozoon Synaptonemal Complex MESH: Spermatozoa Spermatids Spermatozoa Chromatin medicine.anatomical_structure Flagella MESH: Microscopy Electron Transmission Helminthiasis Animal MESH: Spermatogenesis [SDV.MP.PAR] Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology MESH: Spermatids Zoology Animals Wild Archiacanthocephala 010603 evolutionary biology MESH: Flagella MESH: Synaptonemal Complex MESH: Chromatin 03 medical and health sciences Macracanthorhynchus hirudinaceus Microscopy Electron Transmission medicine Animals MESH: Animals Wild [SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology Spermatogenesis Ecology Evolution Behavior and Systematics 030304 developmental biology Spermatid MESH: Centrioles MESH: Acanthocephala biology.organism_classification MESH: Male MESH: Sus scrofa Ultrastructure Parasitology |
| Zdroj: | The Journal of Parasitology The Journal of Parasitology, 2005, 91 (3), pp.499-506 |
| Popis: | International audience; The present paper describes the ultrastructure of spermiogenesis and the spermatozoon of Macracanthorhynchus hirudinaceus, an acanthocephalan parasite of the wild boar Sus scrofa. At the beginning of spermatogenesis, spermatocytes exhibit synaptonemal complexes and 2 centrioles. In the spermatid, only 1 centriole remains, generating a flagellum with a 9+2 pattern. Another ultrastructural feature observed during the spermiogenesis of M. hirudinaceus is the condensation of the chromatin, forming a "honeycomb" structure in the old spermatid and a homogeneous, electron-dense structure in the spermatozoon. The mature spermatozoon of M. hirudinaceus presents a reversed anatomy, as has been described previously in other species of the Acanthocephala. The spermatozoon is divided into 2 parts: an axoneme, and a nucleocytoplasmic derivative. The spermatozoon flagellum exhibits a 9+2 or 9+0 pattern. The process of spermiogenesis and the ultrastructural organization of the spermatozoon of M. hirudinaceus are compared with available data regarding other acanthocephalan species. |
| Databáze: | OpenAIRE |
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