Oogenesis and ovarian morphology in pollinating and non-pollinating fig wasps: evidence from adult and immature stages

Autor(es)

Elias, Larissa Galante ^[1] ; Lino-Neto, Jose ^[2] ; Santinelo Pereira, Rodrigo Augusto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biol, Ribeirao Preto - Brazil

^[2] Univ Fed Vicosa, Dept Biol Geral, Vicosa, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INVERTEBRATE REPRODUCTION & DEVELOPMENT; v. 62, n. 3, p. 162-168, 2018.
• Citações Web of Science: 0

Resumo

Hymenopteran insects have meroistic polytrophic ovaries characterised by trophocytes associated with oocytes inside the follicles. In pro-ovigenic species, all oocytes mature before emergence and no trace of oogenesis is visible in adult females. Pro-ovigeny is a rare condition among Hymenoptera, but common in pollinating fig wasps. In the present investigation, we studied adult and pupa females of three fig wasp species with different trophic strategies. We demonstrated that females of Pegoscapus aerumnosus and Idarnes spp. have an unusual ovarian organisation (i.e. each ovariole has only one mature egg and no oocyte) that has led to misleading interpretation of fig wasp reproductive anatomy. The ovaries of these studied species have several ovarioles, recognisable by the presence of nuclei of tunica propria cells surrounding them. Each adult wasp ovariole had one mature egg. None of the pupae had mature eggs, but all of them had follicles with oocytes in different developmental stages. The studied fig wasps are pro-ovigenic, irrespective of their trophic strategy, since there were no signs of ovigeny in adult females. We discuss ecological and phylogenetic factors that could play a role in fig wasps reproductive strategies. (AU)

• Processo FAPESP: 15/25417-7 - Diversidade e evolução das relações espécies-hospedeiros em vespas associadas a figueiras neotropicais
• Beneficiário: Rodrigo Augusto Santinelo Pereira
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/01918-1 - Papel das glândulas de veneno na biologia larval em espécies de vespas de figo (Hymenoptera: Chalcidoidea)
• Beneficiário: Larissa Galante Elias
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado