Publicação: The ultrastructural aspects of vitellogenesis or oocyte secondary growth in Serrasalmus spilopleura (Teleostei, Characiformes, Serrasalminae)
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Oocyte secondary growth in S. spiloleura corresponds to the period in which different vesicular structures are formed, including the cortical alveoli and the yolk granules. The oocytes with cortical alveolus formation show vesicular structures with filamentous content in the cortical cytoplasmic region, which are the cortical alveolus precursors. In these oocytes, electron-dense vesicles of heterogenous content are dispersed in the inner cytoplasmic region and their nuclei are irregular, showing many nucleoli of different sizes. The oocytes in vitellogenesis are filled with many vesicles. The cortical alveolus precursors are in the peripheral region, and electron-dense granules are seen near to the nucleus. These fuse and form yolk granules. The oocytes in vitellogenesis show a very irregular nucleus that has nucleoli of different sizes. In the oocytes in final vitellogenesis, the yolk granules are scattered throughout the cytoplasm, displacing the cortical alveoli toward cell periphery. The nucleus is similar to the other stages.
Descrição
Palavras-chave
Female, Fish, Serrasalmus spilopleura, Vitellogenesis, cell nucleus, cell vacuole, cytoplasm, egg yolk, female, nonhuman, oocyte development, teleost, vitellogenesis, animal, biosynthesis, Brazil, cytoplasm vesicle, electron microscopy, fish, growth, development and aging, oocyte, physiology, ultrastructure, Characiformes, Serrasalminae, Serrasalmus, Teleostei, vitellogenin, Animals, Cytoplasmic Vesicles, Fishes, Microscopy, Electron, Oocytes, Oogenesis, Vitellogenins
Idioma
Inglês
Como citar
Journal of Submicroscopic Cytology and Pathology, v. 34, n. 2, p. 199-206, 2002.
