Acidic polysaccharides from Psidium cattleianum (Araçá)

The aim of this work was to study the acidic polysaccharides of Psidium cattleianum. Pectic fractions were obtained by successive extractions with water, EDTA and sodium carbonate (4 and 25ºC). Monosaccharide composition, total carbohydrates, uronic acids and protein contents were determined for eac...

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Published in:Brazilian archives of biology and technology Vol. 52; no. 2; pp. 259 - 264
Main Authors: Vriesmann, Lúcia Cristina(Universidade Estadual de Ponta Grossa Campus de Uvaranas), Petkowicz, Carmen Lúcia de Oliveira(Universidade Federal do Paraná Departamento de Bioquímica e Biologia Molecular Setor de Ciências Biológicas), Carneiro, Paulo Irajara Borba(Universidade Estadual de Ponta Grossa Campus de Uvaranas), Costa, Maria Eugênia(Universidade Estadual de Ponta Grossa Campus de Uvaranas), Beleski-Carneiro, Eliana(Universidade Estadual de Ponta Grossa Campus de Uvaranas)
Format: Journal Article
Language:English
Published: Tecpar 01-04-2009
Instituto de Tecnologia do Paraná (Tecpar)
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Abstract The aim of this work was to study the acidic polysaccharides of Psidium cattleianum. Pectic fractions were obtained by successive extractions with water, EDTA and sodium carbonate (4 and 25ºC). Monosaccharide composition, total carbohydrates, uronic acids and protein contents were determined for each fraction. The yield of water and EDTA-soluble fractions and high content of uronic acid were consistent with the presence of pectins probably arising from the middle lamellae. On the other hand, sodium carbonate-soluble pectins had a higher neutral sugar content, indicating highly branched polysaccharides in these fractions, consistent with pectins from cell wall. Psidium cattleianum, árvore nativa do sul do Brasil, produz frutos popularmente conhecidos como araçá e que muitas vezes não são colhidos e estragam nos campos. Neste trabalho, os frutos de P. cattleianum foram utilizados como fonte de polissacarídeos ácidos. Frações de pectinas foram obtidas por extrações seqüenciais com água, agente quelante (EDTA) e carbonato de sódio (4 e 25ºC). A composição monossacarídica, os teores de açúcar total, ácidos urônicos e proteínas foram determinados para cada fração. O rendimento das frações solúveis em água e EDTA e o elevado teor de ácidos urônicos são consistentes com a presença de pectinas oriundas provavelmente da lamela média. Por outro lado, as pectinas solúveis em carbonato de sódio têm o maior teor de açúcares neutros, indicando a presença de polissacarídeos altamente ramificados nestas frações, consistentes com pectinas da parede celular.
AbstractList The aim of this work was to study the acidic polysaccharides of Psidium cattleianum. Pectic fractions were obtained by successive extractions with water, EDTA and sodium carbonate (4 and 25ºC). Monosaccharide composition, total carbohydrates, uronic acids and protein contents were determined for each fraction. The yield of water and EDTA-soluble fractions and high content of uronic acid were consistent with the presence of pectins probably arising from the middle lamellae. On the other hand, sodium carbonate-soluble pectins had a higher neutral sugar content, indicating highly branched polysaccharides in these fractions, consistent with pectins from cell wall. Psidium cattleianum, árvore nativa do sul do Brasil, produz frutos popularmente conhecidos como araçá e que muitas vezes não são colhidos e estragam nos campos. Neste trabalho, os frutos de P. cattleianum foram utilizados como fonte de polissacarídeos ácidos. Frações de pectinas foram obtidas por extrações seqüenciais com água, agente quelante (EDTA) e carbonato de sódio (4 e 25ºC). A composição monossacarídica, os teores de açúcar total, ácidos urônicos e proteínas foram determinados para cada fração. O rendimento das frações solúveis em água e EDTA e o elevado teor de ácidos urônicos são consistentes com a presença de pectinas oriundas provavelmente da lamela média. Por outro lado, as pectinas solúveis em carbonato de sódio têm o maior teor de açúcares neutros, indicando a presença de polissacarídeos altamente ramificados nestas frações, consistentes com pectinas da parede celular.
The aim of this work was to study the acidic polysaccharides of Psidium cattleianum. Pectic fractions were obtained by successive extractions with water, EDTA and sodium carbonate (4 and 25ºC). Monosaccharide composition, total carbohydrates, uronic acids and protein contents were determined for each fraction. The yield of water and EDTA-soluble fractions and high content of uronic acid were consistent with the presence of pectins probably arising from the middle lamellae. On the other hand, sodium carbonate-soluble pectins had a higher neutral sugar content, indicating highly branched polysaccharides in these fractions, consistent with pectins from cell wall.Psidium cattleianum, árvore nativa do sul do Brasil, produz frutos popularmente conhecidos como araçá e que muitas vezes não são colhidos e estragam nos campos. Neste trabalho, os frutos de P. cattleianum foram utilizados como fonte de polissacarídeos ácidos. Frações de pectinas foram obtidas por extrações seqüenciais com água, agente quelante (EDTA) e carbonato de sódio (4 e 25ºC). A composição monossacarídica, os teores de açúcar total, ácidos urônicos e proteínas foram determinados para cada fração. O rendimento das frações solúveis em água e EDTA e o elevado teor de ácidos urônicos são consistentes com a presença de pectinas oriundas provavelmente da lamela média. Por outro lado, as pectinas solúveis em carbonato de sódio têm o maior teor de açúcares neutros, indicando a presença de polissacarídeos altamente ramificados nestas frações, consistentes com pectinas da parede celular.
Author Beleski-Carneiro, Eliana(Universidade Estadual de Ponta Grossa Campus de Uvaranas)
Carneiro, Paulo Irajara Borba(Universidade Estadual de Ponta Grossa Campus de Uvaranas)
Costa, Maria Eugênia(Universidade Estadual de Ponta Grossa Campus de Uvaranas)
Vriesmann, Lúcia Cristina(Universidade Estadual de Ponta Grossa Campus de Uvaranas)
Petkowicz, Carmen Lúcia de Oliveira(Universidade Federal do Paraná Departamento de Bioquímica e Biologia Molecular Setor de Ciências Biológicas)
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SubjectTerms acidic polysaccharides
cell wall
Pectins
Psidium cattleianum
Title Acidic polysaccharides from Psidium cattleianum (Araçá)
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