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Histochemical studies on eggshell formation in Paramphistomum cervi (Digenea: Paramphistomatidae)

Published online by Cambridge University Press:  05 June 2009

B. C. Gupta ,
V. R. Parshad  and
S. S. Guraya
B. C. Gupta
Affiliation:
Department of Zoology, College of Basic Sciences and Humanities, Punjab Agricultural University, Ludhiana-141004, India
V. R. Parshad
Affiliation:
Department of Zoology, College of Basic Sciences and Humanities, Punjab Agricultural University, Ludhiana-141004, India
S. S. Guraya
Affiliation:
Department of Zoology, College of Basic Sciences and Humanities, Punjab Agricultural University, Ludhiana-141004, India
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Abstract

The formation of the egg mass in the ootype, containing the oocyte, vitelline cells, numerous spermatozoa and Mehlis’ gland secretion marks the beginning of eggshell formation. Mehlis’ gland cells pour their lipoprotein secretion into the ootype; this secretion forms a thin template around the egg mass and upon this template the shell globules are deposited. Eggshell formation begins in the proximal uterus and is completed in the middle uterus. The eggshells are devoid of phenols and phenolase indicating that hardening is not by quinone tanning. The eggshells contain keratin and are stabilized by disulphide linkages.

Keywords

Paramphistomum cervieggshell formationhistochemistry
Type
Research Papers
Information
Journal of Helminthology , Volume 61 , Issue 1 , March 1987 , pp. 59 - 64
Copyright
Copyright © Cambridge University Press 1987

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