Data/hora: 01/06/2024 06:49:48

Provedor de dados: | 47
País: | Argentina
Título: | An ultrastructural study of spermiogenesis in two species of Sitophilus: Coleoptera: Curculionidae
Autores: | Name,Khesller Patrícia Olázia; Dos Reis,Giuliano Pagy Felipe; Báo,Sônia Nair.
Data: | 2007-08-01
Ano: | 2007
Palavras-chave: | Curculionidae; Sitophilus; Spermiogenesis; Insect sperm; Ultrastructure.
Resumo: | The spermiogenesis of Sitophilus zeamais and Sitophilus oryzae, the maize and the rice weevil, respectively, was studied by light microscopy and scanning and transmission electron microscopy. Sitophilus spp. is the most widespread and destructive primary pest of stored cereals in the world. The spermiogenesis occurs within cysts. There are approximately 256 germ line cells per cyst. Inside each cysts, all the spermatids are in the same stage of maturation. The ultrastructure of the spermatozoa of S. zeamais and S. oryzae is similar to that described for other beetles. The head is formed by a three-layered acrosome with the perforatorium, the acrosomal vesicle, the extra-acrosomal layer and the nucleus. The flagellum has the typical axoneme formed by a 9+9+2 microtubules arrangement, two mitochondrial derivatives and two accessory bodies. The typical pattern for Curculionidae spermatozoa described here may provide useful information for future phylogenetic analysis of the superfamily Curculionoidea.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452007000200005
Editor: | Sociedad Latinoamericana de Microscopía Electrónica.; Centro Regional de Investigaciones Científicas y Tecnológicas (Mendoza, Argentina)
Formato: | text/html
Fonte: | Biocell  v.31 n.2 2007
Fonte: | info:eu-repo/semantics/openAccess