Document Detail

Ultrastructure of two opposite types of abdominal perisympathetic organs in the heteropteran, Roscius elongatus Stål (Pyrrhocoridae). Abundant release of neurosecretory product by intraganglionic organs.
MedLine Citation:
PMID:  6884748     Owner:  NLM     Status:  MEDLINE    
The ultrastructural study of perisympathetic organs (POs) in Roscius elongatus revealed the existence of two opposite neurohemal structures. Distal POs formed a network at the end of each of the first pro-, meso-, metathoracic, and abdominal nerves. They display a thin branched structure favoring contact between axon endings and hemolymph. The distal metathoracic POs contained two types of neurosecretory ending, and the distal abdominal POs three types. On the contrary, "subjacent" POs, strangely located laterally in the abdominal area of the ganglionic nerve mass, display a dense compact structure, containing only one type of neurosecretory ending. These characters demonstrate that the "subjacent" POs, earlier classified as transverse POs because they are symmetrically located, are in fact median POs. In transverse POs, signs of extrusion by exocytosis were observed only in one type of neurosecretory ending. In "subjacent" POs unusual pictures were found indicating abundant release by single or compound exocytosis. Such pictures prove that "subjacent" POs have a neurohemal function despite their dense structure and internal localization. Physiological implications of these opposite structures are discussed.
N Baudry-Partiaoglou
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  General and comparative endocrinology     Volume:  50     ISSN:  0016-6480     ISO Abbreviation:  Gen. Comp. Endocrinol.     Publication Date:  1983 Jun 
Date Detail:
Created Date:  1983-10-08     Completed Date:  1983-10-08     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370735     Medline TA:  Gen Comp Endocrinol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  407-22     Citation Subset:  IM    
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MeSH Terms
Abdomen / innervation
Axons / ultrastructure
Cytoplasm / ultrastructure
Cytoplasmic Granules / ultrastructure
Insects / ultrastructure*
Microscopy, Electron
Neuroglia / ultrastructure
Neurosecretory Systems / ultrastructure
Sympathetic Nervous System / ultrastructure

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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