Ultrastructure of vitellocytes in the cestode Progrillotia pastinacae Dollfus, 1946 [Trypanorhyncha, Progrillotiidae]

• Autorzy: Swiderski Z , Miquel J. , Mlocicki D. , Neifar L. , Grytner-Ziecina B. , Mackiewicz J.S.
• Języki publikacji: EN

Abstrakty

EN

The present study describes the ultrastructure of mature vitellocytes of the trypanorhynch cestode Progrillotia pastinacae Dollfus, 1946 (Progrillotiidae), a parasite of the common stingray Dasyatis pastinaca (Linnaeus, 1758) (Dasyatidae). The vitelline cells of this species measure about 24 μm in length and about 20 μm in width. They have small, elongated, slightly lobulated nuclei, about 4–5 μm in length, with large dense elongated nucleoli and numerous irregularly-shaped dense clumps of heterochromatin. The extensive cytoplasm is rich in numerous cell organelles and cell inclusions. While the perinuclear cytoplasm contains numerous long parallel cisternae of GER, ribo-and polyribosomes, several Golgi complexes and mitochondria, the peripheral cytoplasm contains predominantly three types of cell inclusions: a great number of large lipid droplets, several shell globule clusters, and a very small amount of glycogen-like particles. The most characteristic features of vitellocytes in P. pastinacae are having almost no traces of glycogen and the great number of large, highly osmiophobic lipid droplets representing saturated fatty acids. The presence of large amounts of lipids also in two other trypanorhynchs, Grillotia erinaceus (Beneden, 1858) Guiart, 1927 and Dollfusiella spinulifera (Beveridge et Jones, 2000) Beveridge, Neifar et Euzet, 2004, is in strong contrast to the condition in the most evolved cestodes, Cyclophyllidea, that usually show no trace of lipids.

Słowa kluczowe

EN

parasite; Trypanorhyncha; Progrillotiidae; Progrillotia pastinacae; vitelline cell; cestode; ultrastructure; vitellogenesis

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2006
• Tom: 51
• Numer: 3
• Opis fizyczny: p.194-199,fig.,ref.

Twórcy

autor

Swiderski Z

• Polish Academy of Sciences, Warsaw, Poland

autor

Miquel J.

autor

Mlocicki D.

autor

Neifar L.

autor

Grytner-Ziecina B.

autor

Mackiewicz J.S.

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