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Abstract:

This study deals with the structure of the digestive gland of the carnivorous gastropod Adelomelon beckii in Mar del Plata area (Argentina) and discusses the function of its cell types and compare with other gastropods. According to histological and transmission electron microscopy observations the epithelium is composed of two types of cells that are subject to cyclical changes, involving three phases: absorption, digestion and fragmentation. The majority of the cells, called digestive cells, have a basal nucleus with a cytoplasm filled by spherical digestive vesicles in different stages. The apical pole of the cell is covered with microvilli and cilia and shows evidence of endocytotic activity during the absorption phase. The intracellular digestive process passes through: (1) fusion of endocytotic vesicles; (2) transformation in heterolysososmes by fusion with enzyme-rich vesicles; (3) formation of residual bodies after digestion, which are pinched off to the lumen gland during fragmentation phase. The second type of cell in the acini are called vacuolated cells, which occur in clusters, the nucleus is in the mid-basal region and the cytoplasm is basophilic, filled with stacks of RER. During the absorption phase the vacuolated cells secrete neutral mucins that probably serve as lubrication to facilitate transport of food particles. During all phases, a large amount of lipofuscin, an insoluble pigment that is accumulated after lysosome digestion, is accumulated. The functional morphology of the different cell types found in this carnivorous gastropod is very similar to that found in herbivorous and deposit-feeding gastropods, which suggests that the feeding type does not influence the micro-morphology of the digestive gland. © 2015 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Ultrastructure and histochemistry of the digestive gland of the giant predator snail Adelomelon beckii (Caenogastropoda: Volutidae) from the SW Atlantic
Autor:Arrighetti, F.; Teso, V.; Penchaszadeh, P.E.
Filiación:CONICET-Museo Argentino de Ciencias Naturales, Av. Angel Gallardo 470 3 piso lab. 80, Ciudad Autónoma de Buenos Aires, C1405DJR, Argentina
IBBEA, CONICET-UBA, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, Ciudad Autónoma de Buenos Aires, C1428EHA, Argentina
Palabras clave:Caeonogastropod; Digestive cells; Digestive gland; Histology; Ultrastructure; Vacuolated cells; lipofuscin; mucin; absorption; Adelomelon beckii; animal cell; animal tissue; Article; cell structure; cell transport; cell vacuole; controlled study; digestion; digestive function; endocytosis; epithelium cell; eukaryotic flagellum; exocrine gland; fragmentation; histochemistry; lubrication; lysosome; marine snail; membrane vesicle; microvillus; nonhuman; protein secretion; secretory vesicle; species difference; transmission electron microscopy; ultrastructure; animal; cell nucleus; cytochemistry; cytoplasm; digestive system; epithelium; procedures; snail; Caenogastropoda; Gastropoda; Volutidae; Animals; Cell Nucleus; Cytoplasm; Digestive System; Epithelium; Histocytochemistry; Microscopy, Electron, Transmission; Snails
Año:2015
Volumen:47
Número:2
Página de inicio:171
Página de fin:177
DOI: http://dx.doi.org/10.1016/j.tice.2015.01.002
Título revista:Tissue and Cell
Título revista abreviado:Tissue Cell
ISSN:00408166
CODEN:TICEB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00408166_v47_n2_p171_Arrighetti

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Citas:

---------- APA ----------
Arrighetti, F., Teso, V. & Penchaszadeh, P.E. (2015) . Ultrastructure and histochemistry of the digestive gland of the giant predator snail Adelomelon beckii (Caenogastropoda: Volutidae) from the SW Atlantic. Tissue and Cell, 47(2), 171-177.
http://dx.doi.org/10.1016/j.tice.2015.01.002
---------- CHICAGO ----------
Arrighetti, F., Teso, V., Penchaszadeh, P.E. "Ultrastructure and histochemistry of the digestive gland of the giant predator snail Adelomelon beckii (Caenogastropoda: Volutidae) from the SW Atlantic" . Tissue and Cell 47, no. 2 (2015) : 171-177.
http://dx.doi.org/10.1016/j.tice.2015.01.002
---------- MLA ----------
Arrighetti, F., Teso, V., Penchaszadeh, P.E. "Ultrastructure and histochemistry of the digestive gland of the giant predator snail Adelomelon beckii (Caenogastropoda: Volutidae) from the SW Atlantic" . Tissue and Cell, vol. 47, no. 2, 2015, pp. 171-177.
http://dx.doi.org/10.1016/j.tice.2015.01.002
---------- VANCOUVER ----------
Arrighetti, F., Teso, V., Penchaszadeh, P.E. Ultrastructure and histochemistry of the digestive gland of the giant predator snail Adelomelon beckii (Caenogastropoda: Volutidae) from the SW Atlantic. Tissue Cell. 2015;47(2):171-177.
http://dx.doi.org/10.1016/j.tice.2015.01.002