Electron microscopy discloses nerve endings in contact with gland cells situated in the labrum of Daphnia. Swellings of nerve fibers are in close contact with gland cell membranes, either on the cell surface or inserted into infoldings of plasma membrane. The axonal processes are single or double and lack glial wrappings. Inside the nerve fibers are vesicles of different sizes and electron density. These include granular vesicles, which often are dense‐cored, and also clearer vesicles. Some presynaptic differentiations lie along the contact line of the axonal process with the gland cell membrane. The significance of the vesicles is discussed in terms of their possible content of biogenic amines, as described in other invertebrates. Copyright © 1988 Wiley‐Liss, Inc.

Occurrence of innervation in labral glands of Daphnia obtusa (crustacea, cladocera)

ZENI, Cristina;ZAFFAGNINI, Fulvio
1988

Abstract

Electron microscopy discloses nerve endings in contact with gland cells situated in the labrum of Daphnia. Swellings of nerve fibers are in close contact with gland cell membranes, either on the cell surface or inserted into infoldings of plasma membrane. The axonal processes are single or double and lack glial wrappings. Inside the nerve fibers are vesicles of different sizes and electron density. These include granular vesicles, which often are dense‐cored, and also clearer vesicles. Some presynaptic differentiations lie along the contact line of the axonal process with the gland cell membrane. The significance of the vesicles is discussed in terms of their possible content of biogenic amines, as described in other invertebrates. Copyright © 1988 Wiley‐Liss, Inc.
1988
Zeni, Cristina; Zaffagnini, Fulvio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1396239
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