title: Vitellogenesis in the tick Amblyomma triste (Koch, 1844) (Acari: Ixodidae) Role for pedicel cells.
abstract: This study presents new information on the vitellogenesis of the tick Amblyomma triste. In this species, the ovary consists of a layer of epithelial cells, which form the ovarian wall, oogonia and developing oocytes; and the pedicel, a cellular structure that synthesizes and provides yolk precursors for developing oocytes. The pedicel also attaches oocytes to the external surface of the epithelial wall. In this study, evidence is provided in support of pedicel cells in providing compounds for oocytes during vitellogenesis.
authors.affiliation: Departamento de Biologia, I.B., UNESP, Av. 24 A, No. 1515, Fone 55 19 35264135, Cx. Postal 199, CEP 13506-900 Rio Claro, SP, Brazil. patyrosaoliv@yahoo.com.br
authors.forename: Patrícia Rosa
authors.initials: PR
authors.lastname: de Oliveira
authors.forename: Maria Izabel Camargo
authors.initials: MI
authors.lastname: Mathias
authors.forename: Gervásio Henrique
authors.initials: GH
authors.lastname: Bechara
mesh_terms: D000818:Animals; D005260:Female; D026863:Ixodidae / Q000033:anatomy & histology* / Q000502:physiology* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning / Q000379:methods / Q000662:veterinary; D009865:Oocytes / Q000166:cytology* / Q000648:ultrastructure; D010053:Ovary / Q000166:cytology* / Q000648:ultrastructure; D014818:Vitellogenesis / Q000502:physiology*