Data/hora: 01/06/2024 06:42:03

Provedor de dados: | 42
País: | Brazil
Título: | Oogenesis and egg development in triatomines: a biochemical approach
Autores: | Atella,Georgia C.; Gondim,Katia C.; Machado,Ednildo A.; Medeiros,Marcelo N.; Silva-Neto,Mário A.C.; Masuda,Hatisaburo.
Data: | 2005-09-01
Ano: | 2005
Palavras-chave: | Oogenesis; Vitellogenesis; Embryogenesis; Triatomines; Rhodnius prolixus.
Resumo: | In triatomines, as well as in other insects, accumulation of yolk is a process in which an extra-ovarian tissue, the fat body, produces yolk proteins that are packed in the egg. The main protein, synthesized by the fat body, which is accumulated inside the oocyte, is vitellogenin. This process is also known as vitellogenesis. There are growing evidences in triatomines that besides fat body the ovary also produces yolk proteins. The way these yolk proteins enter the oocyte will be discussed. Yolk is a complex material composed of proteins, lipids, carbohydrates and other minor components which are packed inside the oocyte in an organized manner. Fertilization triggers embryogenesis, a process where an embryo will develop. During embryogenesis the yolk will be used for the construction of a new individual, the first instar nymph. The challenge for the next decade is to understand how and where these egg proteins are used up together with their non-protein components, in pace with the genetic program of the embryo, which enables cell differentiation (early phase of embryogenesis) and embryo differentiation (late phase) inside the egg.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000300005
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652005000300005
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.77 n.3 2005
Fonte: | info:eu-repo/semantics/openAccess