ISSN:
1432-0878
Keywords:
Corpus cardiacum
;
Scalariform junctions
;
Gap junctions
;
Endocrine gland
;
Intercellular communication
;
Schistocerca gregaria, Locusta migratoria (Insecta)
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The intercellular junctions in the corpora cardiaca of the locusts Schistocerca gregaria and Locusta migratoria were investigated by transmission electron microscopy. In the glandular lobes, complexes consisting of scalariform junctions and associated mitochondria, comparable to those previously observed in ion transporting epithelia, are formed between gland cells, and more rarely between gland cells and the neurons innervating them. Their structure and abundance are apparently unaffected by the stage of development or by the various experimental conditions employed. In the neural lobe, scalariform junctions form between glial cells and show close association with the endoplasmic reticulum. Gap junctions are present among glandular, neural and glial elements, and are formed between cells of the same type and of different types. Contacts resembling punctate tight junctions are widely distributed in the gland, but would be unlikely to form a barrier to diffusion. Septate junctions are formed exclusively between glial cells.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00218871
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