Ultrastructure of the ovariole sheath in Diatraea saccharalis (Lepidoptera: Pyralidae)
Biocell
; 26(2): 229-235, Aug. 2002.
Artigo
em Inglês
| LILACS
| ID: lil-335849
Biblioteca responsável:
BR1.1
ABSTRACT
The ultrastructure of the ovariole sheath along the Diatraea saccharalis ovariole was studied by scanning and transmission electron microscopy. Each ovariole is surrounded by an epithelial sheath, a tunica propria and scattered lumen cells. These three components of the ovariole sheath show different ultrastructural features along the ovariole, in the germarium or in the vitellarium; these differences are more evident in the epithelial sheath cells. The epithelial sheath is composed by two layers of cells, the external one running longitudinally and the internal one running circularly in the ovariole. These cells, in vitellarium, present cytoplasmic bundles of myofilaments that are arranged parallel to the long axis of the cells; these myofilaments are apparently related to the contraction movements of the follicles within the ovariole. The acellular tunica propria, composed of finely filamentous material, is attached to the adjacent follicle cells by adhesive dense plates. Between the epithelial sheath and the tunica propria there is a population of lumen cells, with morphological features of secretory activity.
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Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Ovário
/
Lepidópteros
Limite:
Animais
Idioma:
Inglês
Revista:
Biocell
Assunto da revista:
Clulas
Ano de publicação:
2002
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual Paulista/BR
