Ultrastructure of spermiogenesis and mature spermatozoon of Breviscolex orientalis (Cestoda: Caryophyllidea)

0359383 - BC 2012 RIV DE eng J - Journal Article
Yoneva, Aneta - Levron, Céline - Oros, M. - Orosová, M. - Scholz, Tomáš
Ultrastructure of spermiogenesis and mature spermatozoon of Breviscolex orientalis (Cestoda: Caryophyllidea).
Parasitology Research. Roč. 108, č. 4 (2011), 997-1005. ISSN 0932-0113. E-ISSN 1432-1955
R&D Projects: GA ČR GA524/08/0885; GA ČR GAP506/10/1994; GA MŠMT LC522
Institutional research plan: CEZ:AV0Z60220518
Keywords : GLARIDACRIS-CATOSTOMI COOPER * WENYONIA-VIRILIS WOODLAND * SPERMATOLOGICAL CHARACTERS * SPERM ULTRASTRUCTURE * SPERMATOGENESIS * EUTETRARHYNCHIDAE
Subject RIV: GJ - Animal Vermins ; Diseases, Veterinary Medicine
Impact factor: 2.149, year: 2011

Spermiogenesis and spermatozoon ultrastructure of the caryophyllidean cestode Breviscolex orientalis Kulakovskaya, 1962, a parasite of cyprinid fish Abbottina rivularis, are described using TEM. Spermiogenesis in B. orientalis follows the Type II. During the spermiogenesis, an electron-dense material is observed in the apical region of the differentiation zone; one of the centrioles gives rise to a free flagellum, which then rotates and undergoes proximodistal fusion with the cytoplasmic protrusion of the differentiation zone. The mature spermatozoon of B. orientalis corresponds to the Type III pattern. The comparison of the spermiogenesis of B. orientalis with those of the other caryophyllidean species demonstrates some variation within the order relative to the presence and morphology of the intercentriolar body, the presence of slight rotation of the flagellar bud and a complete proximodistal fusion of the free flagellum with a cytoplasmic protrusion.
Permanent Link: http://hdl.handle.net/11104/0197177