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First spermatological study in the Atractotrematidae (Digenea, Haploporoidea): the case of Atractotrema sigani, intestinal parasite of Siganus lineatus.

Bakhoum AJ, Quilichini Y, Justine JL, Bray RA, Miquel J, Feliu C, Bâ CT, Marchand B - Parasite (2015)

Bottom Line: However, the mature spermatozoon of A. sigani has some specific characters such as the morphology of its anterior region and the submembranous electron-dense material.Although similar structures have been reported in some digenean species, the presence of a submembranous electron-dense material describing a complete ring is reported here for the first time in the mature spermatozoon of A. sigani.In addition, sperm characteristics are compared between the Haploporoidea and their supposed close superfamilies, and possible phylogenetic implications of these findings for the Digenea are discussed.

View Article: PubMed Central - PubMed

Affiliation: CNRS-Università di Corsica, UMR 6134-SPE, SERME Service d'Étude et de Recherche en Microscopie Électronique, Corte 20250, Corsica, France - Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Cheikh Anta Diop University of Dakar, BP 5055, Dakar, Senegal.

No MeSH data available.


Related in: MedlinePlus

A–C. Cytochemical test of Thiéry (1967) in the spermatozoon of Atractotrema sigani. (A) Transmission electron micrographs showing the absence of granules of glycogen in region I. (B, C) Cross-sections exhibiting the presence of granules of glycogen in regions III–V of the mature spermatozoon of A. sigani. Cm, cortical microtubules; G, glycogen granules; M2, second mitochondrion; N, nucleus; Pse, posterior spermatozoon extremity. Scale in μm: (A–C), 0.3.
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Figure 3: A–C. Cytochemical test of Thiéry (1967) in the spermatozoon of Atractotrema sigani. (A) Transmission electron micrographs showing the absence of granules of glycogen in region I. (B, C) Cross-sections exhibiting the presence of granules of glycogen in regions III–V of the mature spermatozoon of A. sigani. Cm, cortical microtubules; G, glycogen granules; M2, second mitochondrion; N, nucleus; Pse, posterior spermatozoon extremity. Scale in μm: (A–C), 0.3.

Mentions: The granules of glycogen irregularly distributed along the mature spermatozoon of A. sigani are evidenced by the cytochemical test of Thiéry [47] (Fig. 3A–C). It is interesting to note the absence of glycogen in the anterior spermatozoon extremity (region I) (Fig. 3A).


First spermatological study in the Atractotrematidae (Digenea, Haploporoidea): the case of Atractotrema sigani, intestinal parasite of Siganus lineatus.

Bakhoum AJ, Quilichini Y, Justine JL, Bray RA, Miquel J, Feliu C, Bâ CT, Marchand B - Parasite (2015)

A–C. Cytochemical test of Thiéry (1967) in the spermatozoon of Atractotrema sigani. (A) Transmission electron micrographs showing the absence of granules of glycogen in region I. (B, C) Cross-sections exhibiting the presence of granules of glycogen in regions III–V of the mature spermatozoon of A. sigani. Cm, cortical microtubules; G, glycogen granules; M2, second mitochondrion; N, nucleus; Pse, posterior spermatozoon extremity. Scale in μm: (A–C), 0.3.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4609001&req=5

Figure 3: A–C. Cytochemical test of Thiéry (1967) in the spermatozoon of Atractotrema sigani. (A) Transmission electron micrographs showing the absence of granules of glycogen in region I. (B, C) Cross-sections exhibiting the presence of granules of glycogen in regions III–V of the mature spermatozoon of A. sigani. Cm, cortical microtubules; G, glycogen granules; M2, second mitochondrion; N, nucleus; Pse, posterior spermatozoon extremity. Scale in μm: (A–C), 0.3.
Mentions: The granules of glycogen irregularly distributed along the mature spermatozoon of A. sigani are evidenced by the cytochemical test of Thiéry [47] (Fig. 3A–C). It is interesting to note the absence of glycogen in the anterior spermatozoon extremity (region I) (Fig. 3A).

Bottom Line: However, the mature spermatozoon of A. sigani has some specific characters such as the morphology of its anterior region and the submembranous electron-dense material.Although similar structures have been reported in some digenean species, the presence of a submembranous electron-dense material describing a complete ring is reported here for the first time in the mature spermatozoon of A. sigani.In addition, sperm characteristics are compared between the Haploporoidea and their supposed close superfamilies, and possible phylogenetic implications of these findings for the Digenea are discussed.

View Article: PubMed Central - PubMed

Affiliation: CNRS-Università di Corsica, UMR 6134-SPE, SERME Service d'Étude et de Recherche en Microscopie Électronique, Corte 20250, Corsica, France - Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Cheikh Anta Diop University of Dakar, BP 5055, Dakar, Senegal.

No MeSH data available.


Related in: MedlinePlus