Ultrastructure of ovarian follicular epithelium of the amazonian fish Pseudotylosurus microps (Gunther) (Teleostei, Belonidae): I. the follicular cells cycle of development
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Data
2001-03
Autores
Cruz-landim, Carminda Da [UNESP]
Cruz-hofling, Maria Alice Da
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zoologia
Resumo
The present paper deals with the changes on ultrastructural features of the follicular cells along the growth of the oocyte of Pseudotylosurus microps (Gunther, 1868). The epithelium pass from single squamous to pseudostratified and finally cylindric. Remarkable are the changes in the nuclear shapes, the increasing amount of rough endoplasmic reticulum and the formation of large lipid deposits in the follicular cells by the end of vitellogenic phase. Very peculiar intercellular deposits forms between the perinucleolar and vitellogenic phase of oocyte maturation. Although largely referred to in the specialized literature, our attempts to correlate the follicular cells changes with the formation of the oocyte envelopes or even with an endocrine function are not supported by conclusive evidences in the present paper.
Descrição
Palavras-chave
Pseudotylosurus microps, follicular epithelium, ultrastructure, teleost
Como citar
Revista Brasileira de Zoologia. Curitiba, PR, Brazil: Sociedade Brasileira de Zoologia, v. 18, n. 1, p. 99-109, 2001.