Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/99015
Type: Artigo
Title: Endopolyploidy in follicle epithelial cells around the nurse chamber during oogenesis In Chrysomya putoria (Diptera, Calliphoridae)
Title Alternative: 
Author: Avancini, R. M. P.
Mello, M. L. S.
Abstract: 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. © 1990 Kluwer Academic Publishers.
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.
Subject: Células epiteliais
Folículo ovariano
Oogênese
Poliploide
DNA
Chrysomya putoria
Country: Holanda
Editor: Kluwer Academic Publishers
Citation: Genetica. Kluwer Academic Publishers, v. 81, n. 1, p. 5 - 10, 1990.
Rights: fechado
Identifier DOI: 10.1007/BF00055230
Address: https://link-springer-com.ez88.periodicos.capes.gov.br/article/10.1007/BF00055230
Date Issue: 1990
Appears in Collections:IB - Artigos e Outros Documentos

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