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Excrétion de phosphatase acide par les cellules mucipares de la branchie de Mytilus edulis L.

Etude au microscope électronique

Excretion of acidic phosphatase by the goblet-cells of the gill of Mytilus edulis L.

An electron microscopic study

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Zeitschrift für Zellforschung und Mikroskopische Anatomie Aims and scope Submit manuscript

Summary

Acidic phosphatase activity detected by the Gomori method applied to E.M., has been found in a few secretion granules of each goblet cell of the gill of Mytilus edulis L. In the close proximity of those granules golgian dictyosomes always occur, with acidic phosphatase activity in the lateral parts of the cisternae and in the vesicles arising from the latter. When the mucus is extruded, active and non active secretion granules are mixed and thus, acidic phosphatase activity is regularly found in the mucous tufts extruded into the palleal cavity. Therefore the digestive role — and not merely mechanic — of the mucous tufts may be considered as highly probable. Conversely, the secretion granules from which arises the continuous mucous cover of the epithelium and this cover also, are entirely devoid of any acidic phosphatase activity.

Résumé

Dans toutes les cellules mucipares de la branchie de Mytilus edulis L., quelques grains de secretion montrent une activité phosphatasique acide, décelée par la méthode cytochimique de Gomori appliquée au microscope électronique. A la proximité de ces grains se trouvent des dictyosomes golgiens où une activité phosphatasique se décèle dans les parties latérales des cisternes et dans les vésicules qui en émanent. Au moment de l'excrétion, tous les grains de sécrétion confluent et la phosphatase acide active est incluse dans l'amas de mucus expulsé dans la cavité palléale. Le rôle digestif de ces amas — et non purement mécanique — peut ainsi être considéré comme hautement probable. De telles manifestations enzymatiques sont totalement absentes dans le tapis muqueux ainsi que dans les cellules qui le constituent.

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Pasteels, J.J. Excrétion de phosphatase acide par les cellules mucipares de la branchie de Mytilus edulis L.. Z. Zellforsch. 102, 594–600 (1969). https://doi.org/10.1007/BF00335495

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  • DOI: https://doi.org/10.1007/BF00335495

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