Data/hora: 10/06/2024 04:59:10

Provedor de dados: 	88	
País: 	Brazil	
Título: 	Assimilate partitioning in leaves of the raffinose-storing herb Lamium album L.: the effects of altering source-sink balance	
Autores: 	Kochhar,A.; Rees,T. Ap; Pollock,C.J.	
Data: 	2003-12-01	
Ano: 	2003	
Palavras-chave: 	Lamium album; Oligosaccharides; Source-sink interactions; Starch; Sucrose.	
Resumo: 	In Lamium album, sucrose and raffinose-family oligosaccharides are the major products of photosynthesis that are stored in leaves. Using gas analysis and 14CO2 feeding, we compared photosynthesis and the partitioning of recently-fixed carbon in plants where sink activity was lowered by excision of flowers and chilling of roots with those where sink activity was not modified. Reduction in sink activity led to a reduction in the maximum rate of photosynthesis, to retention of fixed carbon in source leaves and to the progressive accumulation of raffinose-family oligosaccharides. This ultimately affected the extractable activities of invertase and sucrose phosphate synthase. At the end of the light period, invertase activity was significantly higher in treated plants. By contrast sucrose phosphate synthase activity was significantly lower in treated plants. We propose that reducing sink activity in L. album is associated with a shift in metabolism away from starch and sucrose synthesis and towards sucrose catabolism, galactinol utilisation and the synthesis of raffinose-family oligosaccharides.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000400012	
Editor: 	Sociedade Botânica de São Paulo	
Relação: 	10.1590/S0100-84042003000400012	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Botany  v.26 n.4 2003	
Fonte: 	info:eu-repo/semantics/openAccess