Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/97756
Type: Artigo
Title: Change with age of Feulgen-DNA values in the blood-sucking insect, Triatoma infestans Klug
Author: Mello, Maria Luiza S.
Raymundo, Heloisa H.
Abstract: Feulgen-DNA values were evaluated cytophotometrically in the Malpighian tubes of T. infestans at the nymphal, adult and ageing life periods. In all cases the total nuclear Feulgen-DNA contents were found to be distributed within the 32C and 64C classes. However, part of the Feulgen-DNA values is shifted to lower intervals in ageing insects, as compared with nymphal and adult individuals, promoted by decrease in Feulgen-DNA values of the euchromatins. Changed response to Feulgen reaction due to some aging-induced alteration in DNP complexes, and/or breaks and loss of DNA in the euchromatins, as part of the senescence process, are ascribed as responsible for such phenomena.
Feulgen-DNA values were evaluated cytophotometrically in the Malpighian tubes of T. infestans at the nymphal, adult and ageing life periods. In all cases the total nuclear Feulgen-DNA contents were found to be distributed within the 32C and 64C classes. However, part of the Feulgen-DNA values is shifted to lower intervals in ageing insects, as compared with nymphal and adult individuals, promoted by decrease in Feulgen-DNA values of the euchromatins. Changed response to Feulgen reaction due to some aging-induced alteration in DNP complexes, and/or breaks and loss of DNA in the euchromatins, as part of the senescence process, are ascribed as responsible for such phenomena.
Subject: Envelhecimento
Triatoma infestans
Eucromatina
Heterocromatina
Replicação do DNA
Túbulos de Malpighi
Country: Alemanha
Editor: Springer
Citation: Histochemistry. , v. 54, n. 3, p. 219 - 223, 1977.
Rights: fechado
Identifier DOI: 10.1007/BF00492244
Address: https://link.springer.com/article/10.1007/BF00492244
Date Issue: 1977
Appears in Collections:IB - Artigos e Outros Documentos

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