Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae)
When 4th instar nymphs of Panstrongylus megistus are fed with a saturant blood meal, there is an intense proliferation of the spermatogonia. At the end of the intermoult, the older spermatogonial cysts differentiate into 1st primary spermatocyte cysts. In the nymphs deprived of the blood meal this e...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Fundação Oswaldo Cruz (FIOCRUZ)
1991-03-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761991000100003 |
| _version_ | 1797756903723368448 |
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| author | Maria José Costa Schuetz André Freire Furtado |
| author_facet | Maria José Costa Schuetz André Freire Furtado |
| author_sort | Maria José Costa Schuetz |
| collection | DOAJ |
| description | When 4th instar nymphs of Panstrongylus megistus are fed with a saturant blood meal, there is an intense proliferation of the spermatogonia. At the end of the intermoult, the older spermatogonial cysts differentiate into 1st primary spermatocyte cysts. In the nymphs deprived of the blood meal this evolution is not observed, but a small growth of the testicular follicles occurs, due to a few mitotic divisions. This growth is observed at least, until 25 days after ecdysis. Since day 15, an autolytic process starts in the older spermatogonial cysts. The presence of exogenous juvenile hormone III (JH III) does not promote the development of the germ cells in the fasting insects. There is only a small growth of the testicular follicles and the autolytic process is also observed. In the precocious adults obtained by allatectomy or precocene II treatment, germ cells are observed in all development stages, except packed and elongated spermatozoa bundels. |
| first_indexed | 2024-03-12T18:07:16Z |
| format | Article |
| id | doaj.art-3f13289169784d67af615f76cbb2e3aa |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T18:07:16Z |
| publishDate | 1991-03-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-3f13289169784d67af615f76cbb2e3aa2023-08-02T09:25:55ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80601991-03-01861111810.1590/S0074-02761991000100003Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae)Maria José Costa SchuetzAndré Freire FurtadoWhen 4th instar nymphs of Panstrongylus megistus are fed with a saturant blood meal, there is an intense proliferation of the spermatogonia. At the end of the intermoult, the older spermatogonial cysts differentiate into 1st primary spermatocyte cysts. In the nymphs deprived of the blood meal this evolution is not observed, but a small growth of the testicular follicles occurs, due to a few mitotic divisions. This growth is observed at least, until 25 days after ecdysis. Since day 15, an autolytic process starts in the older spermatogonial cysts. The presence of exogenous juvenile hormone III (JH III) does not promote the development of the germ cells in the fasting insects. There is only a small growth of the testicular follicles and the autolytic process is also observed. In the precocious adults obtained by allatectomy or precocene II treatment, germ cells are observed in all development stages, except packed and elongated spermatozoa bundels.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761991000100003Panstrongylus megistushemipterajuvenile hormonemitosismeiosisnutritionspermatogenesis |
| spellingShingle | Maria José Costa Schuetz André Freire Furtado Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae) Memorias do Instituto Oswaldo Cruz Panstrongylus megistus hemiptera juvenile hormone mitosis meiosis nutrition spermatogenesis |
| title | Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae) |
| title_full | Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae) |
| title_fullStr | Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae) |
| title_full_unstemmed | Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae) |
| title_short | Juvenile hormone III and nutrition effects on spermatogenesis in the 4th instar nymphs of Panstrongylus megistus (Hemiptera: Reduviidae) |
| title_sort | juvenile hormone iii and nutrition effects on spermatogenesis in the 4th instar nymphs of panstrongylus megistus hemiptera reduviidae |
| topic | Panstrongylus megistus hemiptera juvenile hormone mitosis meiosis nutrition spermatogenesis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761991000100003 |
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