Data/hora: 03/06/2024 08:17:29

Provedor de dados: | 76
País: | Brazil
Título: | Morphological and functional study of the marginal sphincter of the sea anemones Phymactis clematis and Aulactinia marplatensis from intertidal of Mar del Plata, Argentina
Autores: | Oliveira,Elvira A. González; Patronelli,Darlo Luis; Zamponi,Mauricio O.
Data: | 2009-09-01
Ano: | 2009
Palavras-chave: | Actiniaria; Marginal sphincter; Morphology; Contractility.
Resumo: | It was made the characterization of marginal sphincter to the species Phymactis clematis (Drayton in Dana, 1849) and Aulactinia marplatensis (Zamponi, 1977), from intertidal ecosystem through their morphogical and functional study. The species P. clematis has a circumscript sphincter of palmate type. This muscle is constituted by a mesogloeal axis and several mesogloeal subaxes. Axis as well as subaxes give a support to the endoderm which border is smooth. Aulactinia marplatensis has a circunscript sphincter pinnate type. The axis has a truncated cone shape while in P. clematis the shape is cylindrical on its origin and it is bifurcated at the end. Both species experiments were carried out using the isolated muscles. They were stimulated at increasing KCl concentrations ranging from 20 to 200 mM. The results were analysed in the form of dose-response curves expressed in tension in grams force vs concentration. Contractil force increases in a sigmoid form to increasing KCl concentrations. The correlation between morphology and function and the differences shown in both species would be related to their intertidal distribution.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000300014
Editor: | Museu de Ciências Naturais
Relação: | 10.1590/S0073-47212009000300014
Formato: | text/html
Fonte: | Iheringia. Série Zoologia  v.99 n.3 2009
Fonte: | info:eu-repo/semantics/openAccess