Data/hora: 10/06/2024 03:34:51

Provedor de dados: | 76
País: | Brazil
Título: | Cytochemical study of Rhodnius neglectus and Rhodnius prolixus salivary gland cells (Hemiptera, Triatominae)
Autores: | Anhê,Ana C. B. M.; Lima-Oliveira,Ana P. M.; Azeredo-Oliveira,Maria T. V.
Data: | 2014-12-01
Ano: | 2014
Palavras-chave: | Gland; Morphology; Chromatin; Nucleolus; Nucleus.
Resumo: | Triatomines are hematophagous bugs of medical interest in South and Central America, where they may act as invertebrate hosts of the hemoflagellate protozoa Trypanosoma cruzi (the causative of Chagas’ disease) and Trypanosoma rangeli (Tejera, 1920). Triatomines of Rhodnius genus have salivary gland formed by two close and independent units: the principal and the accessory. This gland secretes saliva that abounds in substances that facilitate and permit feeding. Despite this importance, there are few reports on its cytochemistry. In purpose of amplifying this understanding, in this work it was investigated the nuclear structures (chromatin and nucleolar corpuscles) of salivary gland cells of Rhodnius neglectus (Lent, 1954) and Rhodnius prolixus (Stål, 1859). The salivary glands were removed from adult insects, fixed and submitted to different cytochemical methods: lacto-acetic orcein, silver ion impregnation, Feulgen reaction, Toluidine Blue, Variant method of critical electrolyte concentration and C-banding. The results evidenced predominance of binucleated cells, with bulky and polyploid nucleus, decondensed chromatin and a large nucleolar area. In addition, cytoplasmic metachromasy and a clear association between nucleolar and heterochromatic corpuscles were observed. Such characteristics were associated with intense synthesis activity to produce saliva. Besides, the heterochromatic corpuscles observed with C Banding permitted the differentiation of sexes and species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000400002
Editor: | Museu de Ciências Naturais
Relação: | 10.1590/1678-476620141044399403
Formato: | text/html
Fonte: | Iheringia. Série Zoologia  v.104 n.4 2014
Fonte: | info:eu-repo/semantics/openAccess