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Title: Spermiogenesis and the spermatozoon ultrastructure of Robphildollfusium fractum (Digenea: Gyliauchenidae), an intestinal parasite of Sarpa salpa (Pisces: Teleostei)
Author: Bakhoum, Abdoulaye Jacque Sacodou
Sène, Aminata
Ndiaye, Papa Ibnou
Bâ, Cheikh Tidiane
Miquel Colomé, Jordi
Keywords: Espermatogènesi
Ultraestructura (Biologia)
Ultrastructure (Biology)
Issue Date: Jul-2012
Publisher: Elsevier Masson SAS
Abstract: Spermiogenesis in Robphildollfusium fractum begins with the formation of a differentiation zone containing: two centrioles, each bearing striated rootlets, nucleus, several mitochondria and an intercentriolar body constituted by seven electron-dense layers. The two centrioles originate two free flagella growing orthogonally to the median cytoplasmic process. Later, the free flagella rotate and undergo proximodistal fusion with the median cytoplasmic process. Nuclear and mitochondrial migrations occur before this proximodistal fusion. Finally, the young spermatozoon detaches from the residual cytoplasm after the constriction of the ring of arched membranes. The spermatozoon of R. fractum exhibits two axonemes of different length of the 9 +"1" trepaxonematan pattern, nucleus, two mitochondria, two bundles of parallel cortical microtubules, external ornamentation of the plasma membrane, spine-like bodies and granules of glycogen. Additionally, a shorter axoneme, which does not reach the nuclear region, the presence of an electron-dense material in the anterior spermatozoon extremity and the morphologies of both spermatozoon extremities characterize the mature sperm of R. fractum.
Note: Versió postprint del document publicat a:
It is part of: Comptes Rendus Biologies, 2012, vol. 335, num. 7, p. 435-444
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ISSN: 1631-0691
Appears in Collections:Articles publicats en revistes (Biologia, Sanitat i Medi Ambient)
Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio))

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