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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
05/07/2023 |
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Autoria: |
COURTENS, J. L. |
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Título: |
Some nucleocytoplasmic exchanges during spermiogenesis of boar, ram, and stallion. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Gamete Research, v. 5, n. 2, p. 137-152, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The problem of how the successive nucleoproteins enter and leave the nucleus of mammalian spermatids is studied with electron microscopy in thick and thin sections of testis, stained en bloc with the procedure of Thiery and Rambourg [1976], which is able to immobilize small molecules. Staining at different pH values reveals that the stain could demonstrate some spermatidspecific nucleoproteins in elongating nuclei and the spermatozoa-specific protamines in elongated nuclei of the boar, the ram, and the stallion. The stained substances enter or leave the nuclei at precise steps in spermiogenesis. They follow several ways inside a special apparatus made rigid with the manchette. The apparatus is composed of the endoplasmic reticulum, continuous with the nuclear envelope, and of the nuclear pockets continuous with the nuclear pores. In the stallion and the boar, cytoplasmic granules, surrounded by a double wall of membranes, fuse with the nuclear envelope at the time the protamines enter the nucleus. |
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Thesagro: |
Bioquímica; Caprino; Espermatogênese; Ovino; Reprodução; Sêmen. |
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Thesaurus Nal: |
Reproduction; Sheep; Spermatogenesis; Spermatozoa. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01669naa a2200241 a 4500
001 1523766
005 2023-07-05
008 1982 bl uuuu u00u1 u #d
100 1 $aCOURTENS, J. L.
245 $aSome nucleocytoplasmic exchanges during spermiogenesis of boar, ram, and stallion.$h[electronic resource]
260 $c1982
520 $aAbstract: The problem of how the successive nucleoproteins enter and leave the nucleus of mammalian spermatids is studied with electron microscopy in thick and thin sections of testis, stained en bloc with the procedure of Thiery and Rambourg [1976], which is able to immobilize small molecules. Staining at different pH values reveals that the stain could demonstrate some spermatidspecific nucleoproteins in elongating nuclei and the spermatozoa-specific protamines in elongated nuclei of the boar, the ram, and the stallion. The stained substances enter or leave the nuclei at precise steps in spermiogenesis. They follow several ways inside a special apparatus made rigid with the manchette. The apparatus is composed of the endoplasmic reticulum, continuous with the nuclear envelope, and of the nuclear pockets continuous with the nuclear pores. In the stallion and the boar, cytoplasmic granules, surrounded by a double wall of membranes, fuse with the nuclear envelope at the time the protamines enter the nucleus.
650 $aReproduction
650 $aSheep
650 $aSpermatogenesis
650 $aSpermatozoa
650 $aBioquímica
650 $aCaprino
650 $aEspermatogênese
650 $aOvino
650 $aReprodução
650 $aSêmen
773 $tGamete Research$gv. 5, n. 2, p. 137-152, 1982.
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