A study of secretion and cytoplasmic inclusions in the cells of the salivary glands of Tipula paludosa

Autor: R. A. R. Gresson
Rok vydání: 1936
Předmět:
Zdroj: Zeitschrift f�r Zellforschung und Mikroskopische Anatomie. 25:131-142
ISSN: 1432-0878
0302-766X
Popis: 1. The salivary glands of Tipula paludosa are lined by a single layer of cells; the shape and size of these cells are correlated with the phases of secretory activity. 2. The secretion, in liquid form, is stored in a vesicular area which makes its appearance in the cytoplasm at the basal pole of the nucleus; the vesicle increases in size, surrounds the nucleus, and finally discharges the secretory material into the lumen of the gland; the nucleus migrates into the cytoplasm in the basal region of the cell, and the cell, apparently regenerates. 3. The Golgi bodies in cells, prior to, and in the early phases of secretory activity, consist of an osmiophilic cortex and a chromophobic central substance. The mitochondria are present as granules, filaments, rods and spherical bodies. The Golgi bodies and mitochondria undergo changes of form and distribution during secretory activity. There is no visible connection between the Golgi bodies and mitochondria and the secretory substance. 4. It is suggested that the Golgi material and mitochondria take part in the synthesis of the secretory substance. As the nucleus remains in close association with the vesicular area, it is probable that it plays some part in the formation of the secretion. Extrusions from the nucleus to the cytoplasm were not observed. 5. It is concluded that vacuoles, which are stained by neutral red, are segregation products. 6. The Golgi bodies in the cells of the cerebral and thoracic ganglia consist of an osmiophilic cortex and a central chromophobic substance. Granular mitochondria occur scattered throughout the cytoplasm.
Databáze: OpenAIRE
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