Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development
Synbranchus marmoratus is a protogynous diandric teleost fish widely distributed throughout South America. The aim of this work was to study the ultrastructure of the vitelline envelope and the relationship among oocyte and their follicular cells during oogenesis. During perinucleolar stage, the ooc...
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todo:paper_00408166_v35_n1_p9_Ravaglia2023-10-03T14:51:11Z Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development Ravaglia, M.A. Maggese, M.C. Oogenesis Ovarian follicle Synbranchidae Ultrastructure Vitelline envelope animal experiment article cell membrane cell ultrastructure cytology developmental stage female microvillus nonhuman oocyte oocyte development oocyte maturation ovary follicle ovary follicle cell ovary follicle development ovulation teleost vitelline membrane zona pellucida Synbranchidae Synbranchus marmoratus Teleostei Synbranchus marmoratus is a protogynous diandric teleost fish widely distributed throughout South America. The aim of this work was to study the ultrastructure of the vitelline envelope and the relationship among oocyte and their follicular cells during oogenesis. During perinucleolar stage, the oocyte and the follicular cells form microvillar processes that project into the perivitelline space. The oocyte secretes a dense and amorphous material, which appears as the first evidence of the vitelline envelope (VE) development. The VE passes from a double to a multilayered structure during oocyte growth. In mature oocytes, the VE reach a mean thickness of 11 μm, having up to 30 layers. Oocyte microvilli are thinner than the follicular ones and were seen in contact with the follicular plasmalema, however we could not find any contact between the follicular microvilli and the oolemma. Before ovulation, microvillar processes retract and the pore canals seem to collapse. An outer electron dense layer occludes the superficial pore and forms a continuous layer. No jelly or adhesive coatings were seen at least in ovulated eggs sampled from ovarian lumen. Follicular cell and oocyte cytological characteristics do not differ from those described in other teleosts species. © 2003 Elsevier Science Ltd. All rights reserved. Fil:Ravaglia, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maggese, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00408166_v35_n1_p9_Ravaglia |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Oogenesis Ovarian follicle Synbranchidae Ultrastructure Vitelline envelope animal experiment article cell membrane cell ultrastructure cytology developmental stage female microvillus nonhuman oocyte oocyte development oocyte maturation ovary follicle ovary follicle cell ovary follicle development ovulation teleost vitelline membrane zona pellucida Synbranchidae Synbranchus marmoratus Teleostei |
| spellingShingle |
Oogenesis Ovarian follicle Synbranchidae Ultrastructure Vitelline envelope animal experiment article cell membrane cell ultrastructure cytology developmental stage female microvillus nonhuman oocyte oocyte development oocyte maturation ovary follicle ovary follicle cell ovary follicle development ovulation teleost vitelline membrane zona pellucida Synbranchidae Synbranchus marmoratus Teleostei Ravaglia, M.A. Maggese, M.C. Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development |
| topic_facet |
Oogenesis Ovarian follicle Synbranchidae Ultrastructure Vitelline envelope animal experiment article cell membrane cell ultrastructure cytology developmental stage female microvillus nonhuman oocyte oocyte development oocyte maturation ovary follicle ovary follicle cell ovary follicle development ovulation teleost vitelline membrane zona pellucida Synbranchidae Synbranchus marmoratus Teleostei |
| description |
Synbranchus marmoratus is a protogynous diandric teleost fish widely distributed throughout South America. The aim of this work was to study the ultrastructure of the vitelline envelope and the relationship among oocyte and their follicular cells during oogenesis. During perinucleolar stage, the oocyte and the follicular cells form microvillar processes that project into the perivitelline space. The oocyte secretes a dense and amorphous material, which appears as the first evidence of the vitelline envelope (VE) development. The VE passes from a double to a multilayered structure during oocyte growth. In mature oocytes, the VE reach a mean thickness of 11 μm, having up to 30 layers. Oocyte microvilli are thinner than the follicular ones and were seen in contact with the follicular plasmalema, however we could not find any contact between the follicular microvilli and the oolemma. Before ovulation, microvillar processes retract and the pore canals seem to collapse. An outer electron dense layer occludes the superficial pore and forms a continuous layer. No jelly or adhesive coatings were seen at least in ovulated eggs sampled from ovarian lumen. Follicular cell and oocyte cytological characteristics do not differ from those described in other teleosts species. © 2003 Elsevier Science Ltd. All rights reserved. |
| format |
JOUR |
| author |
Ravaglia, M.A. Maggese, M.C. |
| author_facet |
Ravaglia, M.A. Maggese, M.C. |
| author_sort |
Ravaglia, M.A. |
| title |
Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development |
| title_short |
Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development |
| title_full |
Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development |
| title_fullStr |
Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development |
| title_full_unstemmed |
Ovarian follicle ultrastructure in the teleost Synbranchus marmoratus (BLOCH, 1795), with special reference to the vitelline envelope development |
| title_sort |
ovarian follicle ultrastructure in the teleost synbranchus marmoratus (bloch, 1795), with special reference to the vitelline envelope development |
| url |
http://hdl.handle.net/20.500.12110/paper_00408166_v35_n1_p9_Ravaglia |
| work_keys_str_mv |
AT ravagliama ovarianfollicleultrastructureintheteleostsynbranchusmarmoratusbloch1795withspecialreferencetothevitellineenvelopedevelopment AT maggesemc ovarianfollicleultrastructureintheteleostsynbranchusmarmoratusbloch1795withspecialreferencetothevitellineenvelopedevelopment |
| _version_ |
1807318952303394816 |