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Título: Alterations in the lipid and soluble sugar content of melanoxylon brauna seeds during natural and accelerated ageing
Autor(es): Viviane Borges Corte
Eduardo Euclydes de Lima e Borges
José Francisco de Carvalho Gonçalves
Mirian S. Silva
Assunto: carbohydrates
fatty-acid profile
Tropical trees
ISSN: 0101-3122
Revista: Revista Brasileira de Sementes
Volume: 32
Resumo: The decay of seeds is irreversible and at best can only be delayed by applying techniques that reduce the velocity of the metabolic reactions involved. There is little information on the biochemistry of tropical forest tree seeds related to their storability. It was investigated the influence of the composition of lipids and soluble sugars of two storage compartments, the cotyledons and the embryonic axis, of Melanoxylon brauna Schot. (Leguminosae- Caesalpinioideae), a hardwood known as black brauna, seeds stored at 20 ºC for 0, 3, 6, 9 and 12 months (natural ageing) and for 0, 24, 48, 72 and 96 hours at 40 ºC (accelerated ageing). The levels of fatty acids and monosaccharides varied differentially in each of the embryo storage compartments. Changes in oligosaccharide levels were similar for both types of ageing, diminishing in both compartments. Ageing can be attributed to the significant decrease of oligosaccharides and the increase of glucose in both types of ageing and both embryo compartments.
ISSN: 0101-3122
Aparece nas coleções:Coordenação de Dinâmica Ambiental (CDAM)

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