Novel arabinan and galactan oligosaccharides from dicotyledonous plants

Daniel Wefers, Catrin E. Tyl, Mirko Bunzel

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40 Scopus citations


Arabinans and galactans are neutral pectic side chains and an important part of the cell walls of dicotyledonous plants. To get a detailed insight into their fine structure, various oligosaccharides were isolated from quinoa, potato galactan, and sugar beet pulp after enzymatic treatment. LC-MS2 and one- and two-dimensional NMR spectroscopy were used for unambiguous structural characterization. It was demonstrated that arabinans contain β-(1→3)-linked arabinobiose as a side chain in quinoa seeds, while potato galactan was comprised of β-(1→4)-linked galactopyranoses which are interspersed with α-(1→4)-linked arabinopyranoses. Additionally, an oligosaccharide with two adjacent arabinofuranose units O2-substituted with two ferulic acid monomers was characterized. The isolated oligosaccharides gave further insight into the structures of pectic side chains and may have an impact on plant physiology and dietary fiber fermentation.

Original languageEnglish (US)
Article number100
JournalFrontiers in Chemistry
Issue numberNOV
StatePublished - 2014

Bibliographical note

Publisher Copyright:
© 2014 Wefers, Tyl and Bunzel.


  • Arabinans
  • Cell wall
  • Ferulic acid
  • Galactans
  • NMR
  • Oligosaccharides
  • Pectin
  • Polysaccharides


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