Data/hora: 09/06/2024 11:38:35

Provedor de dados: | 52
País: | Brazil
Título: | Storage sites in seeds of Caesalpinia echinata and C. ferrea (Leguminosae) with considerations on nutrients flow
Autores: | Teixeira,Simone de Pádua; Machado,Sílvia Rodrigues.
Data: | 2008-02-01
Ano: | 2008
Palavras-chave: | Cotyledon; Embryo; Endosperm; Histochemistry; Reserve substances; Ultrastructure.
Resumo: | The seeds of Caesalpinia echinata and C. ferrea behaved as typical endospermic seeds, despite their different morphological classification (exendospermic seeds were described for C. echinata and endospermic seeds for C. ferrea). Then, the aim of this work was to compare, under ultrastructural and histochemical terms, the nature of the storage substances and their accumulation sites, as well as the nutrient flow in seeds of these species. Cotyledons in C. echinata accumulate carbohydrates, lipids and proteins, which are mobilized from the outer to the inner parts as revealed by the position of plasmodesmata. Endosperm in C. ferrea accumulates carbohydrates and in C. echinata accumulates substances during the initial embryogenic phases. Such tissue develops a chalazal haustorium that is responsible for the transport of substances into the endosperm itself and from it into the embryo, confirmed by the presence of transference cells.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100016
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132008000100016
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.51 n.1 2008
Fonte: | info:eu-repo/semantics/openAccess