Investigations of the Diurnal Activity of the Endocrine Dorsal bodies inHelix aspersa
- 1 December 1988
- journal article
- research article
- Published by Taylor & Francis in International Journal of Invertebrate Reproduction and Development
- Vol. 14 (2-3) , 229-243
- https://doi.org/10.1080/01688170.1988.10510382
Abstract
The activity of the endocrine dorsal bodies (DB) of the adult land snail Helix aspersa living in the field shows striking fluctuations during a 24 hr cycle. Quantitative electron microscopical data revealed that the number of secretory granules, the volume of the Golgi apparatus and the number of Golgi saccules containing electron-dense material were maximal at 1 am and minimal at 1 pm. The use of tannic acid indicated the exocytosis of secretory material was intense around 1 pm and only moderate at 1 am. The results suggest that, under natural conditions, the DB have a diurnal rhythm of activity, packaging secretory material into secretory granules mainly during the night and releasing it during the afternoon.Keywords
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