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Spermiogenesis and spermatozoon ultrastructure of the cranial digenean Troglotrema acutum (Leuckart, 1842).
J Parasitol. 2006 Jun; 92(3):441-53.JP

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.

Authors+Show Affiliations

Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Spain. jordimiquel@ub.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16883984

Citation

Miquel, Jordi, et al. "Spermiogenesis and Spermatozoon Ultrastructure of the Cranial Digenean Troglotrema Acutum (Leuckart, 1842)." The Journal of Parasitology, vol. 92, no. 3, 2006, pp. 441-53.
Miquel J, Fournier-Chambrillon C, Fournier P, et al. Spermiogenesis and spermatozoon ultrastructure of the cranial digenean Troglotrema acutum (Leuckart, 1842). J Parasitol. 2006;92(3):441-53.
Miquel, J., Fournier-Chambrillon, C., Fournier, P., & Torres, J. (2006). Spermiogenesis and spermatozoon ultrastructure of the cranial digenean Troglotrema acutum (Leuckart, 1842). The Journal of Parasitology, 92(3), 441-53.
Miquel J, et al. Spermiogenesis and Spermatozoon Ultrastructure of the Cranial Digenean Troglotrema Acutum (Leuckart, 1842). J Parasitol. 2006;92(3):441-53. PubMed PMID: 16883984.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Spermiogenesis and spermatozoon ultrastructure of the cranial digenean Troglotrema acutum (Leuckart, 1842). AU - Miquel,Jordi, AU - Fournier-Chambrillon,Christine, AU - Fournier,Pascal, AU - Torres,Jordi, PY - 2006/8/4/pubmed PY - 2006/8/15/medline PY - 2006/8/4/entrez SP - 441 EP - 53 JF - The Journal of parasitology JO - J. Parasitol. VL - 92 IS - 3 N2 - 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. SN - 0022-3395 UR - https://www.unboundmedicine.com/medline/citation/16883984/Spermiogenesis_and_spermatozoon_ultrastructure_of_the_cranial_digenean_Troglotrema_acutum__Leuckart_1842__ L2 - http://www.journalofparasitology.org/doi/10.1645/GE-743R.1?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -