The granules which occur in the cells of a part of the midgut wall in Cercopid larvae and adults (Homoptera) have been studied by biochemical and cytochemical methods and by electron microscopy. The granules have a diameter up to about 2µ and contain calcium, magnesium, iron, carbonates, and phosphates. Protein and acid mucopolysaccharide have also been detected. A chromatographic study shows that uric acid and guanine are not present. The young concretions occur primarily in ergastoplasmic cisternae. They are first wholly electron-opaque, but their center becomes more and more clear. In very old spheres, only a thin shell of electron-opaque material remains. The spheres which have reached about 1µ in diameter are all associated with myelin figures. The granule-containing cells, which nearly occlude the lumen of the midgut in larvae, are eliminated in the very young adults, but the storage excretion still continue in adults.
Article|
May 01 1968
COMPOSITION, STRUCTURE, ET MODE DE FORMATION DES CONCRÉTIONS MINÉRALES DANS L'INTESTIN MOYEN DES HOMOPTERES CERCOPIDES
Jean Gouranton
Jean Gouranton
From Groupe de Recherches de Biologie cellulaire, Faculté des Sciences, Rennes, France
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Jean Gouranton
From Groupe de Recherches de Biologie cellulaire, Faculté des Sciences, Rennes, France
Received:
October 25 1967
Revision Received:
November 28 1967
Online Issn: 1540-8140
Print Issn: 0021-9525
1968
J Cell Biol (1968) 37 (2): 316–328.
Article history
Received:
October 25 1967
Revision Received:
November 28 1967
Citation
Jean Gouranton; COMPOSITION, STRUCTURE, ET MODE DE FORMATION DES CONCRÉTIONS MINÉRALES DANS L'INTESTIN MOYEN DES HOMOPTERES CERCOPIDES . J Cell Biol 1 May 1968; 37 (2): 316–328. doi: https://doi.org/10.1083/jcb.37.2.316
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