1972
DOI: 10.1002/jmor.1051380407
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Fine structure of the midgut epithelium in the developing brown shrimp, Penaeus aztecus

Abstract: The midgut epithelium of larval and early postlarval brown shrimp has been studied with light and electron microscopy. Ultrastructurally the features of the midgut do not change during these stages of development. On the basis of electron density, two epithelial cell types can be distinguished, and these are referred to as light and dark cells. The dark cells contain more rough endoplasmic reticulum and more free ribosomes than the light cells. Mitochondria in the dark cells have a matrix which is less electro… Show more

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Cited by 51 publications
(27 citation statements)
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“…This is supported by the strong immunoreactivity of the branchiostegites and epipodites compared with low levels of Na ϩ /K ϩ -ATPase in the gill filaments. Previous studies showed that the pleurae might be regulating organs before the gills develop (Talbot et al 1972;Lignot and Charmantier 2001). In C. crangon, we observed a similar situation, with branchiostegites and epipodites as the main osmoregulatory organs in the late larval and early juvenile phase, whereas the gills may attain a regulatory function only in later juvenile stages.…”
Section: Discussionsupporting
confidence: 82%
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“…This is supported by the strong immunoreactivity of the branchiostegites and epipodites compared with low levels of Na ϩ /K ϩ -ATPase in the gill filaments. Previous studies showed that the pleurae might be regulating organs before the gills develop (Talbot et al 1972;Lignot and Charmantier 2001). In C. crangon, we observed a similar situation, with branchiostegites and epipodites as the main osmoregulatory organs in the late larval and early juvenile phase, whereas the gills may attain a regulatory function only in later juvenile stages.…”
Section: Discussionsupporting
confidence: 82%
“…The epithelia of the branchiostegites and pleurae are differentiated in the zoea I and VI stages, showing typical features of ionocytes such as apical microvilli and basolateral infoldings of the cytoplasmic membrane in close contact with numerous mitochondria. A similar type of tissue differentiation was observed in larvae and juveniles of Farfantepenaeus aztecus (Talbot et al 1972) and Penaeus japonicus (Bouaricha et al 1994), in the zoeal stages of Callianassa jamaicense (Felder et al 1986), and in early juvenile stages of Homarus gammarus (Lignot and Charmantier 2001). In the first decapodid and subsequent juveniles of C. crangon, we identified ionocytes in the branchiostegites and epipodites, but they disappeared from the pleurae.…”
Section: Discussionsupporting
confidence: 80%
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“…Studies with electron microscopy revealed that the gut epithelium usually consists of a single layer of cells joined by junctional complexes at the apical margin, and separated by lateral intercellular spaces (Komuro & Yamamoto, 1968;Georgi, 1969;Koulish, 1971;Talbot, Clark & Lawrence, 1972;Hootman & Conte, 1974;Holdich & Mayes, 1975;Quaglia, Sabelli & Villani, 1976;Mykles, 1977Mykles, , 1979Johnson, 1980;see Gibson & Barker, 1979 for a review on the hepatopancreas). Commonly observed features include microvillous apical borders, and elaborate infoldings of the lateral and basal membranes that are closely associated with numerous mitochondria.…”
Section: List Of Tablesmentioning
confidence: 99%
“…They showed that nutrient absorption probably occurs in the MGT of penaeid shrimp during the larval stage, but minimal assimilation occurs in juveniles and adults (see also Ahearn, 1987). Observations that the MGT cells have the morphology of transporting epithelia has led to the suggestion that all or part of the MGT may serve a role in osmoregulation or water uptake, especially at molting (Talbot et al, 1971;Mykles, 1977;Neufeld and Cameron, 1994). However, a thorough understanding of the role of the MGT in normal crustacean physiology is lacking.…”
mentioning
confidence: 95%