Mitotic and meiotic behavior of &gama; irradiated holocentric chromosomes of Rhynchospora pubera (Cyperaceae)
In order to evaluate the occurrence of diffuse kinetochores in Rhynchospora (Cyperaceae), chromosomes of R. pubera were fragmented or fused by &gama; irradiation. This material was investigated in subsequent cell generations, in both mitosis and meiosis. Alterations in number and size of chromos...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Brasil |
| Recursos: | Universidade Estadual de Maringá (UEM) |
| Repositorio: | Acta Scientiarum Biological Sciences |
| Idioma: | portugués |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/2364 |
| Acesso em linha: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2364 |
| Access Level: | acceso abierto |
| Palavra-chave: | Cyperaceae holocentric chromosomes meiosis mitosis Rhynchospora 2.00.00.00-6 Ciências Biológicas |
| Resumo: | In order to evaluate the occurrence of diffuse kinetochores in Rhynchospora (Cyperaceae), chromosomes of R. pubera were fragmented or fused by &gama; irradiation. This material was investigated in subsequent cell generations, in both mitosis and meiosis. Alterations in number and size of chromosomes were detected, but the anaphase behavior of irradiated chromosomes was normal and no micronucleus was observed. All these data point to the presence of diffuse kinetochores in R. pubera. |
|---|