Spermiogenesis in the proteocephalidean cestode Proteocephalus torulosus (Batsch, 1786)

0157615 - PAU-O 20033002 RIV DE eng J - Článek v odborném periodiku
Bruňanská, Magdaléna - Nebesářová, Jana - Scholz, Tomáš
Spermiogenesis in the proteocephalidean cestode Proteocephalus torulosus (Batsch, 1786).
Parasitology Research. Roč. 90, č. 4 (2003), s. 318-324. ISSN 0932-0113. E-ISSN 1432-1955
Grant CEP: GA ČR GA524/01/1314; GA ČR GA206/03/1317
Výzkumný záměr: CEZ:AV0Z6022909
Klíčová slova: cestoda * spermiogenesis * ultrastructure
Kód oboru RIV: GJ - Choroby a škůdci zvířat, veterinární medicína
Impakt faktor: 1.000, rok: 2003

Spermiogenesis of the cestode Proteocephalus torulosus (Batsch, 1786) was examined for the first time using transmission electron microscopy. Spermiogenesis begins with the formation of a distal cytoplasmic protrusion, a differentiation zone, at the periphery of the early spermatid. This differentiation zone is lined with cortical microtubules and contains two centrioles. A flagellar bud arises from each centriole, growing later as a free flagellum. Simultaneously, a median cytoplasmic process (MCP) develops distally to the flagella. The two flagella, which are of unequal length, become longer and rotate towards the MCP. The nucleus elongates and when both flagella are fused with the MCP, the nucleus subsequently migrates into the MCP. Finally, the advanced spermatids detach from a condensing residual cytoplasm at the level of the arching membranes.
Trvalý link: http://hdl.handle.net/11104/0055053