Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae)
Various types of "nuages" and "lamellae anulata" can be found during Dermatobia hominis spermatogenesis. In spermatogonia, the "nuages" occur as granules juxtaposed to the cytoplasmic face of the nuclear envelope or as cytoplasmic granules similar to glycogen granules....
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Instituto Oswaldo Cruz, Ministério da Saúde
1995-08-01
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doaj-c07779a2fc0e41a0842e63e795fd6d592020-11-24T21:30:40ZengInstituto Oswaldo Cruz, Ministério da SaúdeMemórias do Instituto Oswaldo Cruz.0074-02761678-80601995-08-0190453754510.1590/S0074-02761995000400023Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae)Irani Quagio-GrassiottoEdy de LelloVarious types of "nuages" and "lamellae anulata" can be found during Dermatobia hominis spermatogenesis. In spermatogonia, the "nuages" occur as granules juxtaposed to the cytoplasmic face of the nuclear envelope or as cytoplasmic granules similar to glycogen granules. In spermatocytes, in addition to the "nuages", dense spherical bodies of approximately 1.0 µm in diameter are also observed. In the spermatids the "nuages" can be of the following types: perinuclear granules, spherical granules with diameters varying in length from 0.5 to 1.0 µm, granules similar to glycogen granules, granules with variable diameters which accumulate at the flagellum base forming the centriole adjunct, or remain in the cytoplasm. "Nuages" can also be observed in these cellular types as dense masses, without a definite outline and are common to animal germinal cells in general. The "lamellae anulata" on the other hand, are observed only in spermatocytes I and in early spermatids, being always immersed in electron-dense material of indefinite outline. In spermatids, the "lamellae anulata" are close to the nuclear envelope suggesting, in spite of opposing opinions, that these cells are envolved in the synthesis and transport of material from the nucleus to the cytoplasm.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761995000400023Dermatobia hominisspermatogenesisnuagelamellae anulata |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Irani Quagio-Grassiotto Edy de Lello |
spellingShingle |
Irani Quagio-Grassiotto Edy de Lello Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae) Memórias do Instituto Oswaldo Cruz. Dermatobia hominis spermatogenesis nuage lamellae anulata |
author_facet |
Irani Quagio-Grassiotto Edy de Lello |
author_sort |
Irani Quagio-Grassiotto |
title |
Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae) |
title_short |
Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae) |
title_full |
Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae) |
title_fullStr |
Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae) |
title_full_unstemmed |
Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae) |
title_sort |
occurrence of "nuages" and "lamellae anulata" during spermatogenesis in dermatobia hominis (diptera: cuterebridae) |
publisher |
Instituto Oswaldo Cruz, Ministério da Saúde |
series |
Memórias do Instituto Oswaldo Cruz. |
issn |
0074-0276 1678-8060 |
publishDate |
1995-08-01 |
description |
Various types of "nuages" and "lamellae anulata" can be found during Dermatobia hominis spermatogenesis. In spermatogonia, the "nuages" occur as granules juxtaposed to the cytoplasmic face of the nuclear envelope or as cytoplasmic granules similar to glycogen granules. In spermatocytes, in addition to the "nuages", dense spherical bodies of approximately 1.0 µm in diameter are also observed. In the spermatids the "nuages" can be of the following types: perinuclear granules, spherical granules with diameters varying in length from 0.5 to 1.0 µm, granules similar to glycogen granules, granules with variable diameters which accumulate at the flagellum base forming the centriole adjunct, or remain in the cytoplasm. "Nuages" can also be observed in these cellular types as dense masses, without a definite outline and are common to animal germinal cells in general. The "lamellae anulata" on the other hand, are observed only in spermatocytes I and in early spermatids, being always immersed in electron-dense material of indefinite outline. In spermatids, the "lamellae anulata" are close to the nuclear envelope suggesting, in spite of opposing opinions, that these cells are envolved in the synthesis and transport of material from the nucleus to the cytoplasm. |
topic |
Dermatobia hominis spermatogenesis nuage lamellae anulata |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761995000400023 |
work_keys_str_mv |
AT iraniquagiograssiotto occurrenceofnuagesandlamellaeanulataduringspermatogenesisindermatobiahominisdipteracuterebridae AT edydelello occurrenceofnuagesandlamellaeanulataduringspermatogenesisindermatobiahominisdipteracuterebridae |
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1725962386512281600 |