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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Inferring muscular ground patterns in Bivalvia: Myogenesis in the scallop Nodipecten nodosus

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Autor(es):
Audino, Jorge A. [1] ; Marian, Jose Eduardo A. R. [1] ; Kristof, Alen [2] ; Wanninger, Andreas [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Zool, BR-05508090 Sao Paulo - Brazil
[2] Univ Vienna, Dept Integrat Zool, A-1090 Vienna - Austria
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Frontiers in Zoology; v. 12, DEC 2 2015.
Citações Web of Science: 4
Resumo

Background: Myogenesis is currently investigated in a number of invertebrate taxa using combined techniques, including fluorescence labeling, confocal microscopy, and 3D imaging, in order to understand anatomical and functional issues and to contribute to evolutionary questions. Although developmental studies on the gross morphology of bivalves have been extensively pursued, organogenesis including muscle development has been scarcely investigated so far. Results: The present study describes in detail myogenesis in the scallop Nodipecten nodosus (Linnaeus, 1758) during larval and postmetamorphic stages by means of light, electron, and confocal microscopy. The veliger muscle system consists of an anterior adductor muscle, as well as four branched pairs of striated velum retractors and two pairs of striated ventral larval retractors. The pediveliger stage exhibits a considerably elaborated musculature comprising the velum retractors, the future adult foot retractor, mantle (pallial) muscles, and the anterior and posterior adductors, both composed of smooth and striated portions. During metamorphosis, all larval retractors together with the anterior adductor degenerate, resulting in the adult monomyarian condition, whereby the posterior adductor retains both myofiber types. Three muscle groups, i.e., the posterior adductor, foot retractor, and pallial muscles, have their origin prior to metamorphosis and are subsequently remodeled. Conclusions: Our data suggest a dimyarian condition (i.e., the presence of an anterior and a posterior adductor in the adult) as the basal condition for pectinids. Comparative analysis of myogenesis across Bivalvia strongly argues for ontogenetic and evolutionary independence of larval retractors from the adult musculature, as well as a complex set of larval retractor muscles in the last common bivalve ancestor. (AU)

Processo FAPESP: 12/11708-1 - Anatomia e morfogênese da borda do manto da vieira Nodipecten nodosus (L. 1758)(Bivalvia: Pectinidae)
Beneficiário:Jorge Alves Audino
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 13/17685-6 - Aplicação de microscopia confocal e reconstrução 3D em investigações de anatomia em Pectinidae (Bivalvia): novas perspectivas para a compreensão do desenvolvimento da margem palial
Beneficiário:Jorge Alves Audino
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Mestrado