Endopolyploidy in follicle epithelial cells around the nurse chamber during oogenesis in Chrysomya putoria (Diptera, Calliphoridae).
Genetica
; 81(1): 5-10, 1990.
Article
em En
| MEDLINE
| ID: mdl-2384217
Feulgen-DNA values and nuclear areas were evaluated microspectrophotometrically for epithelial cells of the ovarian follicle during oogenesis in Chrysomya putoria. The aim was to investigate whether polyploidization occurred in the cells surrounding the nurse chamber and/or in those around the oocyte as well as whether different DNA amounts were found regarding the cell types considered. Four DNA endoreduplicative cycles could be demonstrated for the epithelial cells regardless of their localization on the follicle, during oogenesis. A small percentage of epithelial cells reaches a 32C degree. The nuclear area, however, did not increase at the same rate in cells covering the oocyte as in those covering the nurse chamber, in some of the oogenesis stages. The meaning of endopolyploidy for these cells is discussed, considering reports on relevance of secretory activities and their maintenance in polyploid cell systems.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oogênese
/
Poliploidia
/
Corantes de Rosanilina
/
DNA
/
Dípteros
Limite:
Animals
Idioma:
En
Revista:
Genetica
Ano de publicação:
1990
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda