Histological, histochemical and electron microscopical studies on the cytosomes of the nerve cells in Anodonta cygnea L. (Mollusca, Lamellibranchiata)

Zs.-Nagy, Imre (1967) Histological, histochemical and electron microscopical studies on the cytosomes of the nerve cells in Anodonta cygnea L. (Mollusca, Lamellibranchiata). A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 34. pp. 25-39. ISSN 0365-3005

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Abstract

Author investigated on all the three paired ganglia of Anodonta cygnea L. the properties of cytosomes in the usual way as well as after freeze-drying in paraffine-embedded material and On cryostat sections. The applied methods were: “neurosecretory” stainings histochemical reactions to detect respiratory enzymes and electron-microscopic investigations. The electron-microscopic structure of lipochrome pigment-containing granules is identical with the structure of cytosomes in Gastropods reported by Nolte and co-workers (1965). The paraldehydefuchsin-positive material of the cytosomes corresponds to the carotenoid-containing lipochrome pigments. This pigment is in general alcohol-soluble — in summer, autumn and winter it can be dissolved from the cells completely within a short period of time (30 min) and in this case be obtained paraldehydefuchsin positivity in material exposed to alcohol treatment only for a short time or not at all. In spring the alcohol solubility of the pigment decreases and it cannot be dissolved from the nerve cells even after a longer (20 hours) period. In these cases be found in the cells paraldehydefuchsin positivity in materials exposed to longer alcohol treatment, too. Histochemically the cytochrome oxidase and succinate-dehydrogenase activities are localized besides mitochondria also in the cytosomes. This emphasizes the important role of cytosomes in cell metabolism. Tubular mitochondria of special structure are present besides the cytosomes.

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