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The xylose-rich pectins from pea hulls
C M Renard1, R M Weightman, J F Thibault
1Institut National de la Recherche Agronomique, Centre de Recherches Agro-alimentaires, Laboratoire de Biochimie et Technologie des Glucides, Nantes, France.
International Journal of Biological Macromolecules
|August 1, 1997
Summary
Hot acid extracts from pea hull (HSP) were analyzed for their carbohydrate composition. Fractionation revealed pectins and arabinans, with one pectic fraction containing xylogalacturonans, suggesting potential applications in food science.
Area of Science:
- Plant biochemistry
- Carbohydrate chemistry
- Food science
Background:
- Pea hulls are a rich source of polysaccharides.
- Understanding the composition of pea hull polysaccharides is crucial for valorization.
Purpose of the Study:
- To characterize the hot acid extract of pea hull (HSP).
- To investigate the structural features of HSP fractions.
Main Methods:
- Hot acid extraction of pea hull.
- Fractionation using copper precipitation and ion-exchange chromatography.
- Enzymatic degradation with endo-polygalacturonase and endo-xylanase.
Main Results:
- HSP was rich in galacturonic acid, arabinose, and xylose.
- The copper-soluble fraction contained arabinan, heteroxylans, and glucan.
- The copper-precipitate contained pectins, arabinan, xylan, glucan, and mannan.
- A pectic fraction rich in terminal xylose and fucose was identified, containing xylogalacturonans.
Conclusions:
- Pea hull hot acid extract is a complex mixture of polysaccharides, primarily pectins and arabinans.
- The presence of xylogalacturonans in a pectic fraction suggests specific structural motifs.
- Further research into the enzymatic degradation and structural elucidation of these fractions is warranted.