Data/hora: 05/06/2024 15:59:21

Provedor de dados: | 88
País: | Brazil
Título: | Diurnal variations of non-structural carbohydrates in vegetative tissues of Melinis minutiflora, Echinolaena inflexa and Lolium multiflorum (Poaceae)
Autores: | Souza,Amanda de; Sandrin,Carla Z.; Moraes,Moemy G.; Figueiredo-Ribeiro,Rita de Cássia L.
Data: | 2005-12-01
Ano: | 2005
Palavras-chave: | Cerrado; Fructans; Panicoideae; Pooideae; Starch; Sugars.
Resumo: | Echinolaena inflexa (Poir.) Chase is a native C3 grass species with high biomass production and abundance in the cerrado comparable to Melinis minutiflora Beauv., a C4 forage grass of African origin, widespread in the cerrado, displacing some native herbaceous species. These species accumulate mainly starch, differently of Lolium multiflorum Lam. ssp. italicum Beck cv. Lema (ryegrass), a C3 temperate forage grass that accumulates fructans as the major storage carbohydrate in the vegetative tissues. In the present study, we analyzed diurnal variations in the content and composition of non-structural carbohydrates (NSC) in the aerial vegetative parts of the three species. Results showed similarity in water-soluble carbohydrates (WSC) and starch contents between Melinis minutiflora and Echinolaena inflexa, with the exotic grass accumulating higher amounts of NSC. However, the levels of sucrose, glucose and fructose were 10 fold higher in Lolium multiflorum, that accumulates fructan as the main storage carbohydrate. Although the contents of WSC and starch were similar in the tropical species E. inflexa and M. minutiflora, their diurnal variations were different and could be related to starch metabolism, especially in M. minutiflora.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000400010
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042005000400010
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.28 n.4 2005
Fonte: | info:eu-repo/semantics/openAccess