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Fructans and water suppression on intact and fragmented rhizophores of Vernonia herbacea BABT
Dias-Tagliacozzo,Gláucia M.; Itaya,Nair M.; Carvalho,M. Angela Machado de; Figueiredo-Ribeiro,Rita de Cássia L.; Dietrich,Sonia M. C..
In order to evaluate the involvement of fructans in drought tolerance, experiments were conducted using intact plants and excised rhizophores of Vernonia herbacea. The water content in rhizophores of intact plants was maintained for 30 days when plants were watered every 7 and 15 days, whereas plants remained alive up to 60 days without water. Total fructan, oligo- to polysaccharides ratio and mean molecular mass of polysaccharides increased in these plants indicating depolymerization of median size molecules. In apical fragments of rhizophores kept dry the oligosaccharides increased in relation to polysaccharides one day after excision in treated tissues. This was reflected in the HPLC profile of the oligosaccharides in which the proportion of free...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inulin; Environmental stresses; Drought; Fructan metabolism; Reserve organs; Asteraceae.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300005
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