The Ultrastructure of the Digestive and Excretory Organs

Martoja, R.; Ballan-Dufrancais, C.

doi:10.1007/978-1-4613-2715-8_6

Cited by 108 publications

(93 citation statements)

References 108 publications

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“…The regenerative cells in the midgut of mated female Rhodnius were similar to those described from earlier stages of Rhodnius (Bauer 1981) and from other diverse species (Martoja & Ballan-Dufrancais 1982), although they were never seen in conspicuous regenerative "nests" common in many insect groups. As mitotic activity was never observed after a blood meal, it is presumed that feeding does not induce proliferation of the epithelium.…”

Section: Discussionsupporting

confidence: 77%

“…While these cells exhibit the gross structure and organization typical of an insect midgut epithelium (for reviews see Andries 1982;Martoja & Ballan-Dufrancais 1982), the midgut cells of Rhodnius and other Hemiptera do possess some unusual ultrastructural modifications (Burgos & Gutierrez 1976;Gutierrez & Burgos 1978;Lane & Harrison 1979;Andries & Torpier 1982;Baerwald & Delcarpio 1983), some of which are produced in response to a blood meal (Bauer 1981;Billingsley & Downe 1983, 1985. It has been noted that, unlike many other insect groups (Anderson & Harvey 1966;de Priester 1971;Reinhardt 1976), the midgut of Rhodnius displays little evidence of specialization into functional cell types.…”

mentioning

confidence: 99%

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Nondigestive Cell Types in the Midgut Epithelium of Rhodnius Prolixus (Hemiptera: Reduviidae)1

Billingsley

Downe

1986

Journal of Medical Entomology

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Abstract. The ultrastructure of regenerative cells and endocrine cells in the midgut epithelium of mated female Rhodnius prolixus is described. Regenerative cells are numerous, found in all midgut regions, and do not contain any of the normal secretory apparatus of a cell. Endocrine cells are less numerous, restricted to the intestine, and contain prominent Golgi complexes, electron-opaque vacuoles, and intermediate-staining secretory granules. Both cell types rest on the basal lamina of the midgut and are considerably smaller than the normal digestive epithelial cells. The structure of the endocrine cells is compared to those from other insects, and a role for the endocrine cell in the hormonal control of blood meal digestion is postulated.

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Section: Discussionsupporting

confidence: 77%

mentioning

confidence: 99%

Nondigestive Cell Types in the Midgut Epithelium of Rhodnius Prolixus (Hemiptera: Reduviidae)1

Billingsley

Downe

1986

Journal of Medical Entomology

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“…The conjunctive tissue between muscle fibers and surrounding the muscles is connected to the peritoneal layer described by Buzzi & Miyazaki (1999) and Gallo et al (2002). According to Martoja & Ballan-Dufrançais (1984), Leite & Evangelista (2001) the results obtained in this research, which found that the epithelium of T. collaris is single-layered. However, those authors mention other types of cells, i.e., goblet, coprophilic, and those having an endocrine function.…”

Section: Discussionmentioning

confidence: 66%

Histological description of the midgut and the pyloric valve of Tropidacris collaris (Stoll, 1813) (Orthopetera: Romaleidae)

et al. 2006

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The present research describes the histology of the midgut, gastric caeca, and pyloric valve of Tropidacris collaris (Stoll, 1813), (Orthopetera: Romaleidae). We used light microscopy, staining (Gomori's trichrome and periodic acid-Schiff (PAS)), and a routine histological analysis method (hematoxilin-eosin). The insects were obtained from, and also bred in, the Laboratory of Entomology, Department of Biology, of the Rural Federal University of Pernambuco (UFRPE). The collected material was fixed in alcoholic Boüin and embedded in paraplast. The results demonstrated that the midgut wall is composed of an inner epithelial layer and two outer layers of striate muscles: one internal (circular) and the other external (longitudinal), with connective tissue between the muscle fibers. The epithelium is single-layered, with two cell types: regenerative and elongated columnar. The gastric caeca presents muscle layers similar to those of the midgut. Simple columnar epithelium lines the gastric caeca, which presents villi and projects towards the lumen. The pyloric valve is of striate muscle tissue, covered by a single epithelial-cell layer.

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“…Tissues were sectioned (6-μm thick) on a Leitz microtome (GMI, Ramsey, MN), mounted on albumincoated slides, dried, and stored at room temperature until stained. The slides were stained with hematoxylin and eosin (H&E) as previously described (Martoja et al, 1970) and examined and imaged under a BX21 light microscope (Olympus, Tokyo, Japan) fitted with a Digital Sight DS-U3 camera (Nikon, Tokyo, Japan).…”

Section: Histology Of Gill and Hepatopancreas Tissuesmentioning

confidence: 99%

Effects of hypoxia in the gills of the Manila clam Ruditapes philippinarum using NMR-based metabolomics

Zhang

Wei

et al. 2017

Marine Pollution Bulletin

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Coastal hypoxia affects the survival, behavior, and reproduction of individual local marine organisms, and the abundance, biomass, and biodiversity of coastal ecosystems. In this study, we investigated the chronic effects of hypoxia on the metabolomics in the gills of Ruditapes (R.) philippinarum. The results indicated significant alterations in the metabolite profiles in the gills of the hypoxia-treated clams, in comparison with those maintained under normoxia. The levels of betaine, taurine, glycine, isoleucine, and alanine were significantly reduced, suggesting a disturbance of osmotic balance associated with hypoxia. Meanwhile, metabolites involved in energy metabolism, such as alanine and succinate, were also affected. Dramatic histopathological changes were observed in the gills and hepatopancreases of R. philippinarum grown in hypoxic waters, demonstrating tissue damages apparently caused by long-term exposure to hypoxia. Our findings suggest that hypoxia significantly affects the physiology of R. philippinarum, even at a sub-lethal level, and impedes health of the clams.

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The Ultrastructure of the Digestive and Excretory Organs

Cited by 108 publications

References 108 publications

Nondigestive Cell Types in the Midgut Epithelium of Rhodnius Prolixus (Hemiptera: Reduviidae)1

Nondigestive Cell Types in the Midgut Epithelium of Rhodnius Prolixus (Hemiptera: Reduviidae)1

Histological description of the midgut and the pyloric valve of Tropidacris collaris (Stoll, 1813) (Orthopetera: Romaleidae)

Effects of hypoxia in the gills of the Manila clam Ruditapes philippinarum using NMR-based metabolomics

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