Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniforme: Atherinopsidae)
Por:
Cardenas, R, Chavez, M, Gonzalez, JL, Aley, P, Espinosa, J, Jimenez-Garcia, LF
Publicada:
1 sep 2008
Categoría:
Agricultural and Biological Sciences (miscellaneous)
Resumen:
The structural and ultrastructural features of gonads from endemic Mexican fish have received scarce attention. This study describes the histological and ultrastructural characteristics of oocyte from Chirostoma humboldtianum. The ovary is asynchronic, and as such, most phases of oocyte development are found in the same ovary. The complete process of oogenesis was divided in five stages: oogonium and folliculogenesis, primary growth, cortical alveoli and lipid inclusions, vitellogenesis, and maturation. The presence of big filaments, which appear at the end of primary growth, induces some common follicular adaptation. During primary growth, abundant ribosomes, the rough endoplasmic reticulum, and mitochondria are grouped in the cytoplasm. At the end of this stage, the Z1 layer of the chorion is developed, while microvilli start to be evident. In the cortical alveoli and lipid droplets phase, intense PAS positive vesicles, some of them containing nucleoid material, are observed in the p
Filiaciones:
Cardenas, R:
Univ Nacl Autonoma Mexico, Lab Endocrinol Peces, Unidad Morfol & Func, Fac Estudios Super Iztacala, Tlalnepantla 54090, Edo Mexico, Mexico
Aley, P:
Univ Nacl Autonoma Mexico, Lab Neuromorfol, UIICSE, FES Iztacala, Tlalnepantla 54090, Edo Mexico, Mexico
Espinosa, J:
Univ Nacl Autonoma Mexico, Lab Neuromorfol, UIICSE, FES Iztacala, Tlalnepantla 54090, Edo Mexico, Mexico
Jimenez-Garcia, LF:
Univ Nacl Autonoma Mexico, Fac Ciencias, Lab Microscopia Confocal, Tlalnepantla 54090, Edo Mexico, Mexico
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