Publication: Ultraestructura de los órganos ectodérmicos ampulares en las larvas de dos especies de ascidias (Tunzcata)
Authors
Turón, Xavier
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Facultad de Biología
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Publisher
Murcia: Universidad de Murcia, Servicio de Publicaciones
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DOI
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info:eu-repo/semantics/article
Description
Abstract
Se estudian aspectos ultrastructurales de los órganos ectodérmicos ampulares de las larvas de Diplosoma
spongiforme (Giard) y Polysyncraton lacazei (Giard) (familia Didemnidae). En ambas especies se trata de
órganos tubulares formados por células glandulares secretoras. Los órganos ampulares de Diplosoma spongiforme
producen una secreción electrodensa en su zona distal, mientras que las células de las paredes laterales
presentan una marcada vacuolización del citoplasma apical. Estas características no se han observado en
Polysyncraton lacazei. El desarrollo postmetamórfico de los órganos ampulares en ambas especies es también
distinto. Se discute la posible función de estos órganos en la fijación al sustrato de las larvas y en la producción
de túnica.
The ultrastructure of the ectodermic ampullae in the larvae of Diplosoma spongiforme (Giard) and Polysyncraton lacazei (Giard) (family Didemnidae) is studied. These organs are tubular in shape and are made up of secretory cells in both species. The ampullae of Diplosoma spongiforme produce a dark secretion at their distal end, whereas the cells in their lateral walls undergo a process of vacuolation. These features are not found in Polysyncraton lacazei. The postmetamorphic development of the ampullae is different in both species. The possible role of the arnpullae in tunic supply and attachment is discussed.
The ultrastructure of the ectodermic ampullae in the larvae of Diplosoma spongiforme (Giard) and Polysyncraton lacazei (Giard) (family Didemnidae) is studied. These organs are tubular in shape and are made up of secretory cells in both species. The ampullae of Diplosoma spongiforme produce a dark secretion at their distal end, whereas the cells in their lateral walls undergo a process of vacuolation. These features are not found in Polysyncraton lacazei. The postmetamorphic development of the ampullae is different in both species. The possible role of the arnpullae in tunic supply and attachment is discussed.
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