Spermiogenesis and spermatozoon ultrastructure of the digenean Neoapocreadium chabaudi (Apocreadiidae), a parasite of Balistes capriscus (Pisces,Teleostei) |
| |
| Authors: | H. Kacem A.J.S. Bakhoum L. Neifar J. Miquel |
| |
| Affiliation: | 1. Laboratoire de Biodiversité et Ecosystèmes Aquatiques, Département des Sciences de la Vie, Faculté des Sciences de Sfax, BP 1171, 3000 Sfax, Tunisia;2. Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E-08028 Barcelona, Spain;3. Institut de Recerca de la Biodiversitat, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, E-08028 Barcelona, Spain;1. Electron Microscope Unit, Department of Anatomy and Physiology, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Gauteng, South Africa;2. Department of Anatomy and Physiology, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Gauteng, South Africa;1. Laboratório de Biologia Estrutural, Departamento de Biologia Geral, UFV, 36570-900 Viçosa, Minas Gerais, Brazil;2. Dipartimento Scienze della Vita, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, Italy;1. Ecole Nationale Supérieure des Mines, FAYOL-EMSE, CNRS UMR 6158, LIMOS, 158, cours Fauriel, 42023 Saint-Etienne Cedex 2, France;2. United Institute of Informatics Problems, National Academy of Sciences of Belarus, Surganova 6, 220012 Minsk, Belarus;3. IDRAC, International School of Management, 47, rue Sergent Michel Berthet, CP 607 – 69258 Lyon Cedex 09, France;1. Department of Natural Sciences, The University of Findlay, Findlay, OH 45840, USA;2. Department of Biology, Southeastern Louisiana University, Hammond, LA 70402, USA;3. Department of Biology, Southeast Missouri State University, Cape Girardeau, MO 63701, USA;4. Department of Biology, University of Indianapolis, Indianapolis, IN 47201, USA;1. Instituto de Diversidad y Ecología Animal (IDEA) CONICET and Laboratorio de Biología del Comportamiento, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, CP: X5000JJC, Argentina;2. Instituto de Investigaciones Biológicas y Tecnológicas (IIByT) CONICET and Centro de Biología Celular y Molecular, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Velez Sarsfield 1611, CP: X5016GCA, Argentina;1. Laboratório de Microscopia Eletrônica, Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília-DF, CEP: 70910-900, Brazil;2. Laboratório de Biologia Evolutiva, Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília-DF, Brazil |
| |
| Abstract: | Spermiogenesis and the ultrastructural organization of the spermatozoon of the digenean Neoapocreadium chabaudi are described by means of transmission electron microscopy.Spermiogenesis follows the usual pattern found in the digeneans. It begins with the formation of a zone of differentiation bordered by cortical microtubules, characterized by the presence of an intercentriolar body composed of seven electron-dense plates situated between two striated rootlets and two centrioles. These centrioles give rise to two free flagella. Later, both flagella undergo a rotation of 90° and fuse with the median cytoplasmic process. Spermiogenesis finishes when the ring of arched membranes constricts. The mature spermatozoon of N. chabaudi 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. Nevertheless, several characters such as the morphology of sperm extremities and the presence of spinelike bodies allow us to distinguish N. chabaudi from other digenetic trematodes. The present paper provides the first ultrastructural results of a digenean belonging to the family Apocreadiidae that may be useful for the understanding of digenean relationships and phylogenetic studies. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
