Data/hora: 09/06/2024 06:39:35

Provedor de dados: | 42
País: | Brazil
Título: | Morpho-anatomy and ontogeny of the underground system of Chrysolaena simplex (Less.) Dematt. (Asteraceae)
Autores: | Santos,Vanessa S.; Souza,Vinicius P.; Vilhalva,Divina A.A.; Ferreira,Fernanda P.S.; Paula,José R.; Rezende,Maria Helena.
Data: | 2016-03-01
Ano: | 2016
Palavras-chave: | Bud; Cerrado; Fructan; Phytochemical; Rhizophore; Secretory ducts.
Resumo: | The occurrence of thickened underground systems in Asteraceae is widely reported in the literature. Given the great complexity of underground systems, which may originate from roots, stems, or both, morpho-anatomical analyses are essential to ensure the use of correct terminology. The goals of this study were to describe the morpho-anatomy and ontogeny, investigate the occurrence of secondary metabolites and evaluate the effects of seasonality on the underground system of Chrysolaena simplex (Less.) Dematt. Samples were studied using standard protocols of plant anatomy, scanning electron microscopy, histochemical and phytochemical. The underground system of C. simplex was categorised as a rhizophore which started from cotyledonary node. In adult individuals, with rhizophores completely developed, the primary roots degenerated and adventitious radicular systems are formed. The buds in the subterranean portions promote the rhizophore growing, and form aerial stems when exposed to light. Lipophilic droplets were evident in the parenchymatous cells of the cortex and pith, endodermis and buds. Inulin-type fructans were observed in the stem axis and buds of the rhizophore. The presence of buds, secondary metabolites and the storage of fructans and lipids in the rhizophore can be seen as adaptive traits.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100269
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201620140676
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.88 n.1 2016
Fonte: | info:eu-repo/semantics/openAccess