Morphometric in vitro analysis of the control of the activity of the neurosecretory dark green cells in the freshwater snail Lymnaea stagnalis (L.)
- 1 October 1976
- journal article
- research article
- Published by Springer Nature in Cell and tissue research
- Vol. 174 (2) , 221-231
- https://doi.org/10.1007/bf00222160
Abstract
The neurosecretory Dark Green Cells (DGC) in the pleural and parietal ganglia of the freshwater snail Lymnaea stagnalis seem to be involved in osmoregulation. Previous experiments have indicated that changes of the osmolality of the environment induce activity changes of the DGC. Furthermore, it was shown that information on environmental osmolality reaches the DGC via the blood. In the present study right pleural and parietal ganglion complexes were cultured for 3 days in vitro under different osmotic conditions. Quantitative electron microscopy revealed that, compared with the control osmolality (130 mOsm/kg H2O), osmolalities of 160 and 190 mOsm/kg H2O caused a reduced synthesis and an increased storage of neurohormone in the DGC. Apparently, the activity of the DGC depended on the osmotic pressure of the medium. It is proposed that in vivo the osmotic pressure of the blood (which is related to the osmolality of the environment) regulates DGC activity.Keywords
This publication has 11 references indexed in Scilit:
- An ultrastructural in vitro study on the regulation of neurosecretory activity in the freshwater snail Lymnaea stagnalis (L.) with particular reference to Caudo-dorsal cellsCell and tissue research, 1976
- Electrical properties of ‘dark green’ and ‘yellow’ neurosecretory cells in the snail Lymnaea stagnalis L.Nature, 1975
- Regulation of neurosecretory activity in the freshwater pulmonate Lymnaea stagnalis (L.) with particular reference to the role of the eyesCell and tissue research, 1975
- Secretory Activity of Neurons and Related Electrical ActivityPublished by Elsevier ,1975
- Structure of the neurosecretory system in LepidopteraGeneral and Comparative Endocrinology, 1974
- Changes of extent of Neuro-vascular contacts and number of neuro-glial synaptoid contacts in the pituitary posterior lobe of dehydrated ratsBrain Structure and Function, 1974
- Regulation of neurosecretory activity in the freshwater pulmonate Lymnaea stagnalis (L.)Cell and tissue research, 1973
- Micropinocytotic Origin of Coated and Smooth Microvesicles (“Synaptic Vesicles”) in Neurosecretory Terminals of Posterior Pituitary Glands demonstrated by Incorporation of Horseradish PeroxidaseNature, 1971
- Ultrastructure and histochemistry of neurosecretory cells and neurohaemal areas in the pond snail Lymnaea stagnalis (L.)Cell and tissue research, 1970
- A Method for Breeding and Studying Freshwater Snails Under Continuous Water Change, With Some Remarks On Growth and Reproduction in Lymnaea Stagnalis (L.)Netherlands Journal of Zoology, 1968