Wyniki wyszukiwania

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Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus [Digenea, Gastrothylacidae], a parasite of Bos taurus in Senegal

100%

Seck M. T., Marchand B., Ba C. T.

Acta Parasitologica

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2008

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tom 53

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nr 1

Ultrastructural study of spermiogenesis and of the spermatozoon of Carmyerius endopapillatus has enabled to describe some characteristics of this digenea. The intercentriolar body situated between the two striated roots and the two centrioles, presents a symmetric organization. Both external bands of this intercentriolar body are made up of a row of granules. During spermiogenesis, a flagellar rotation of 90° is described. The old spermatid does not present external ornamentations. The spermatozoon is characterized, in its anterior region, by the presence of a lateral expansion exhibiting one spinelike body. In C. endopapillatus, external ornamentations are localized only at the level where the lateral expansion appears. The posterior extremity of spermatozoon exhibits a nucleus surrounded by a plasmic membrane lacking microtubules, but presenting a small lateral expansion. This is the first species of Gastrothylacidae family studied by transmission electron microscopy.

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Ultrastructural examination of spermiogenesis and spermatozoon ultrastructure in Congo tetra Phenacogrammus interruptus Boulenger, 1899 [Ostariophysi: Characiformes: Alestidae]

80%

Pecio A.

Folia Biologica

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2009

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tom 57

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nr 1-2

13-21

3

Spermiogenesis and fine structure of the spermatozoon in a headstander, Chilodus punctatus [Teleostei, Characiformes, Anostomidae]

80%

Pecio A.

Folia Biologica

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2003

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tom 51

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nr 1-2

4

Spermiogenesis and sperm ultrastructure of the liver fluke Fasciola hepatica L., 1758 [Digenea, Fasciolidae]: transmission and scanning electron microscopy, and tubulin immunocytochemistry

80%

Ndiaye P. I., Miquel J., Fons R., Marchand B.

Acta Parasitologica

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2003

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tom 48

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nr 3

We describe here the ultrastructure of spermiogenesis and the mature spermatozoon of Fasciola hepatica (Trematoda, Digenet Fasciolidae) by means of scanning (SEM) and transmission electron microscopy (TEM). Spermiogenesis in F. hepatica follows the general pattern of digeneans. However, this is the first report of a flagellar rotation of about 120° in Digenea. The mature spermatozoon of F. hepatica is a filiform cell of about 275 µm in length. SEM and whole mount TEM revealed a helical pattern of axonemes around the sperm body. The spermatozoon presented the same ultrastructural organization as the congenent F. gigantica. The most interesting features of the male gamete of F. hepatica therefore are the dorsolateral cytoplasmic expansion, the external ornamentation of the cell membrane and the spine-like bodies. We also analysed the distribution pattern of tubulin in the microtubular cytoskeleton of F. hepatica by means of monoclonal anti-tubulins (anti-α-tubulin, anti-β-tubulin, anti-aα -acetylated tubulin and anti-α-tyrosinated tubulin). These anti-tubulins labelled axonemal and cortical microtubules but not the central core of the 9+‘1’ trepaxonematan axoneme.

Ograniczanie wyników

2 Acta Parasitologica

2 Folia Biologica

2 Marchand B.

2 Pecio A.

1 Ba C. T.

1 Fons R.

1 Miquel J.

1 Ndiaye P. I.

1 Seck M. T.

1 2009

1 2008

2 2003

Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus [Digenea, Gastrothylacidae], a parasite of Bos taurus in Senegal

Ultrastructural examination of spermiogenesis and spermatozoon ultrastructure in Congo tetra Phenacogrammus interruptus Boulenger, 1899 [Ostariophysi: Characiformes: Alestidae]

Spermiogenesis and fine structure of the spermatozoon in a headstander, Chilodus punctatus [Teleostei, Characiformes, Anostomidae]

Spermiogenesis and sperm ultrastructure of the liver fluke Fasciola hepatica L., 1758 [Digenea, Fasciolidae]: transmission and scanning electron microscopy, and tubulin immunocytochemistry