期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 63, 期 50, 页码 10822-10830出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.5b04419
关键词
oats; Avena sativa; cell wall polysaccharides; arabinoxylan; enzymatic fingerprinting; distribution
资金
- European Union
- European Regional Development Fund
- Ministry of Economic Affairs, Agriculture and Innovation, Peaks in the Delta
- Municipality of Groningen
- Provinces of Groningen, Fryslan
- Provinces of Groningen, Drenthe
- Dutch Carbohydrate Competence Center [CCC WP24]
- Agrifirm
- Nutrition Sciences
- DSM
- University Medical Center Groningen (UMCG)
- University of Groningen (RUG)
- Wageningen University (WUR)
Cell wall material from whole oat grains was sequentially extracted to study the structural characteristics of individual arabinoxylan (AX) populations. Araf was singly substituted at both O-3 (mainly) and O-2 positions of Xylp, and no disubstitution of Xylp with Araf residues was found in oat AXs. Both highly substituted and sparsely substituted segments were found in AXs in Ba(OH)(2) extracts, whereas AXs in 1 and 6 M NaOH extracts were rarely branched and easily aggregated. Both O-2-linked GlcA and 4-O-MeGlcA residues were present in oat AXs. A series of AX oligomers with galactose as a substituent was detected for the first time in oats. The present study suggested that the distribution of Araf was contiguous in oat AXs, different from the homogeneous distribution of Aral in wheat and barley AXs, which might result in different fermentation patterns in humans and animals.
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