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Histochemistry of the glands associated with the reproductive tract of Lymnaea stagnalis

Research paper by Anna Maria Bolognani Fantin, Emanuela Vigo

Indexed on: 01 Oct '68Published on: 01 Oct '68Published in: Histochemie. Histochemistry. Histochimie



Abstract

The albumen gland, the muciparous gland and the oöthecal gland of female genital tract of Lymnaea stagnalis, collected in spring, autumn and winter have been studied.The reactions for polysaccharides, proteins and RNA have been performed in order to characterise the secretion of the glands.The albumen gland secretion consists almost exclusively of slightly acid polysaccharides whose histochemical reactions, according to Lison and Grainger and Shillitoe confirm the presence of galactogen. Proteins are also present in the secretion. The muciparous gland secretion consists of strongly acid mucopolysaccharides (non sulphated) produced by large cells among which small cells containing sulphated mucopolysaccharides are present.In the oöthecal gland two zones are present, one with a single type of cells containing acid mucopolysaccharides, and the other with two different types of cells: the first with mucopolysaccharides and the second with sulphated mucopolysaccharides, proteins and glycogen at the basis of the cell. Sialic acids are not present in the secretion of the glands studied.The polysaccharidic composition of the secretion of the glands is different from gland to gland. The secretion of the glands gradually changes and gets acid according to the composition of the various membranes and envelopes wrapping up the eggs.