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Titolo:
O-BETA-D-XYLOPYRANOSYL-(5-O-FERULOYL)-L-ARABINOSE, A WIDESPREAD COMPONENT OF GRASS CELL-WALLS
Autore:
WENDE G; FRY SC;
Indirizzi:
UNIV EDINBURGH,INST CELL & MOL BIOL,DBS,DANIEL RUTHERFORD BLDG,KINGS BLDG,MAYFIELD RD EDINBURGH EH9 3JH MIDLOTHIAN SCOTLAND UNIV EDINBURGH,INST CELL & MOL BIOL,DBS EDINBURGH EH9 3JH MIDLOTHIAN SCOTLAND
Titolo Testata:
Phytochemistry
fascicolo: 6, volume: 44, anno: 1997,
pagine: 1019 - 1030
SICI:
0031-9422(1997)44:6<1019:OAWC>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERULIC ACID; FERULOYLATED ARABINOXYLAN; STRUCTURAL CHARACTERIZATION; PHENOLIC COMPONENTS; SPINACH; POLYSACCHARIDES; GROWTH; OLIGOSACCHARIDES; IDENTIFICATION; COLEOPTILES;
Keywords:
FESTUCA ARUNDINACEA; GRAMINEAE; TALL FESCUE GRASS; FERULOYL ESTERS; OLIGOSACCHARIDES; ARABINOXYLANS; PLANT CELL WALLS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
G. Wende e S.C. Fry, "O-BETA-D-XYLOPYRANOSYL-(5-O-FERULOYL)-L-ARABINOSE, A WIDESPREAD COMPONENT OF GRASS CELL-WALLS", Phytochemistry, 44(6), 1997, pp. 1019-1030

Abstract

Graminaceous cell walls contain arabinoxylans in which some of the Araf residues are 5-O-feruloylated. In the present study, mild acid hydrolysis of (pentosyl-H-3)-labelled Festuca arundinacea cell walls yielded the well-characterized 5-O-Fer-L-Ara (1) and at least seven new (E)-feruloylated oligosaccharides, 2-8. Compound 2 was a feruloylated disaccharide, Fer-(D-Xylp --> L-Ara); electrophoresis in molybdate buffer, Smith degradation and methylation analysis showed a (1 --> 2)-linkage. H-1 and C-13 NMR data and susceptibility to commercial beta-D-xylosidase indicated a beta-linkage. Graded alkaline hydrolysis of 2 showedno evidence for more than one ester group. Hydrolysis with commercialbeta-xylosidase yielded 5-O-feruloyl-L-arabinose. Compound 2 was thusO-beta-D-xylopyranosyl-(5-O-feruloyl)-L-arabinose. We propose that 2 was furanose-linked to a xylan backbone in the intact polymer. Compounds 3-8 also appeared to be O-feruloyl oligosaccharides with a former Araf residue at the reducing terminus. Mild acid hydrolysis of cell walls from twenty other species of grass and one palm also yielded compounds 1-3, and most or all of 4-8. Therefore, these complex feruloylatedside-chains of arabinoxylans are widespread or universal in the Gramineae. Their possible biological roles are discussed. Copyright (C) 1997 Elsevier Science Ltd.

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Documento generato il 01/10/20 alle ore 13:41:55