Ultrastructural changes in female hepatocytes during ovarian maturation of Steindachnerina insculpta (Pisces: Curimatidae)
| Autor: | V. M. A. Ribeiro, T. A. Maria, Nilo Bazzoli, Gilmar B. Santos |
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| Rok vydání: | 2007 |
| Předmět: |
teleost fish
Glycogen Curimatidae Endoplasmic reticulum Ovary Steindachnerina insculpta Fishes Mitochondrion Biology biology.organism_classification Andrology chemistry.chemical_compound chemistry Microscopy Electron Transmission Cytoplasm ovarian maturation Ultrastructure Hepatocytes Animals hepatocytes Female Sexual Maturation General Agricultural and Biological Sciences Cellular Debris |
| Zdroj: | Brazilian Journal of Biology v.66 n.4 2006 Brazilian Journal of Biology Instituto Internacional de Ecologia (IIE) instacron:IIE |
| ISSN: | 1519-6984 |
| Popis: | During gonadal maturation the females of Steindachnerina insculpta, a teleost of the Furnas reservoir, Minas Gerais, Brazil, show low hepatosomatic and high gonadossomatic indexes, suggesting possible transference of hepatic substances to the ovaries. In comparison to the resting phase, in the maturation/mature one the hepatocytes show greater development of both smooth and rough endoplasmic reticula, increased electron density in the mitochondria, and glycogen scattered throughout the cytoplasm. In both resting and maturation/mature phases, the hepatic parenchyma contains melanomacrophagic centers that consist of degenerating cellular debris and are surrounded by capsules formed by cells, resembling fibroblasts, joined by desmosomes. No physiological relation of these centers with ovarian maturation was found. |
| Databáze: | OpenAIRE |
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