Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801)
The physiological significance of the glycoproteins (GPs) secreted by the epithelium of ovarian lamellae is discussed in reference to the reproductive biology of G. blacodes. Histochemical procedures for localising and characterising GPs were used to determine the cytoplasmic components of cells of...
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todo:paper_09201742_v35_n3_p359_Freijo2023-10-03T15:44:46Z Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) Freijo, R.O. García, A.M. Portiansky, E.L. Barbeito, C.G. Macchi, G.J. Díaz, A.O. Epithelium of ovarian lamellae Genypterus blacodes Glycoproteins Histochemistry Ovary animal Argentina article Atlantic Ocean cytochemistry epithelium female fish histology metabolism microscopy ovary Animals Argentina Atlantic Ocean Epithelium Female Fishes Histocytochemistry Microscopy Ovary Genypterus blacodes Ophidiidae Pisces The physiological significance of the glycoproteins (GPs) secreted by the epithelium of ovarian lamellae is discussed in reference to the reproductive biology of G. blacodes. Histochemical procedures for localising and characterising GPs were used to determine the cytoplasmic components of cells of the epithelium that covers the ovarian lamellae of pink cuskeel, Genypterus blacodes (Schneider, 1801) (Pisces, Ophidiidae), during spawning. This species is one of the most valuable demersal fish resources in the Argentine Sea, mainly due its large size and flesh quality. GPs with oxidizable vicinal diol groups, sialic acid with or without O-acyl substituents, O-acyl sugars, neutral sugars and GPs with carboxyl and sulphate groups were detected. Light microscope examination showed morphological changes in the epithelium of ovarian lamellae during the spawning season, associated with a secretory activity of mucus. Optical density studies revealed the presence of polyploid cells encompassing those morphological changes. Results of the present study suggest that the epithelium of ovarian lamellae of G. blacodes performs a secretory role, which is intensified during ovarian maturity, suggesting that G. blacodes could release masses of eggs enveloped in mucus. © Springer Science+Business Media B.V. 2008. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09201742_v35_n3_p359_Freijo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| language |
English |
| orig_language_str_mv |
English |
| topic |
Epithelium of ovarian lamellae Genypterus blacodes Glycoproteins Histochemistry Ovary animal Argentina article Atlantic Ocean cytochemistry epithelium female fish histology metabolism microscopy ovary Animals Argentina Atlantic Ocean Epithelium Female Fishes Histocytochemistry Microscopy Ovary Genypterus blacodes Ophidiidae Pisces |
| spellingShingle |
Epithelium of ovarian lamellae Genypterus blacodes Glycoproteins Histochemistry Ovary animal Argentina article Atlantic Ocean cytochemistry epithelium female fish histology metabolism microscopy ovary Animals Argentina Atlantic Ocean Epithelium Female Fishes Histocytochemistry Microscopy Ovary Genypterus blacodes Ophidiidae Pisces Freijo, R.O. García, A.M. Portiansky, E.L. Barbeito, C.G. Macchi, G.J. Díaz, A.O. Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) |
| topic_facet |
Epithelium of ovarian lamellae Genypterus blacodes Glycoproteins Histochemistry Ovary animal Argentina article Atlantic Ocean cytochemistry epithelium female fish histology metabolism microscopy ovary Animals Argentina Atlantic Ocean Epithelium Female Fishes Histocytochemistry Microscopy Ovary Genypterus blacodes Ophidiidae Pisces |
| description |
The physiological significance of the glycoproteins (GPs) secreted by the epithelium of ovarian lamellae is discussed in reference to the reproductive biology of G. blacodes. Histochemical procedures for localising and characterising GPs were used to determine the cytoplasmic components of cells of the epithelium that covers the ovarian lamellae of pink cuskeel, Genypterus blacodes (Schneider, 1801) (Pisces, Ophidiidae), during spawning. This species is one of the most valuable demersal fish resources in the Argentine Sea, mainly due its large size and flesh quality. GPs with oxidizable vicinal diol groups, sialic acid with or without O-acyl substituents, O-acyl sugars, neutral sugars and GPs with carboxyl and sulphate groups were detected. Light microscope examination showed morphological changes in the epithelium of ovarian lamellae during the spawning season, associated with a secretory activity of mucus. Optical density studies revealed the presence of polyploid cells encompassing those morphological changes. Results of the present study suggest that the epithelium of ovarian lamellae of G. blacodes performs a secretory role, which is intensified during ovarian maturity, suggesting that G. blacodes could release masses of eggs enveloped in mucus. © Springer Science+Business Media B.V. 2008. |
| format |
JOUR |
| author |
Freijo, R.O. García, A.M. Portiansky, E.L. Barbeito, C.G. Macchi, G.J. Díaz, A.O. |
| author_facet |
Freijo, R.O. García, A.M. Portiansky, E.L. Barbeito, C.G. Macchi, G.J. Díaz, A.O. |
| author_sort |
Freijo, R.O. |
| title |
Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) |
| title_short |
Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) |
| title_full |
Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) |
| title_fullStr |
Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) |
| title_full_unstemmed |
Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes (Schneider, 1801) |
| title_sort |
morphological and histochemical characteristics of the epithelium of ovarian lamellae of genypterus blacodes (schneider, 1801) |
| url |
http://hdl.handle.net/20.500.12110/paper_09201742_v35_n3_p359_Freijo |
| work_keys_str_mv |
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1807321870126546944 |