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Titolo:
FERULIC ACID DEHYDRODIMERS IN THE CELL-WALLS OF BETA-VULGARIS AND THEIR POSSIBLE ROLE IN TEXTURE
Autore:
WALDRON KW; NG A; PARKER ML; PARR AJ;
Indirizzi:
AFRC,INST FOOD RES,NORWICH LAB,NORWICH RES PK,COLNEY LANE NORWICH NR47UA NORFOLK ENGLAND
Titolo Testata:
Journal of the Science of Food and Agriculture
fascicolo: 2, volume: 74, anno: 1997,
pagine: 221 - 228
SICI:
0022-5142(1997)74:2<221:FADITC>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUGAR-BEET PULP; FERULOYLATED OLIGOSACCHARIDES; AVENA COLEOPTILES; DIFERULIC ACID; INVOLVEMENT; GROWTH; IDENTIFICATION; PURIFICATION; LIGHT;
Keywords:
TEXTURE; CELL WALLS; BETA VULGARIS; SUGAR-BEET; BEETROOT; FERULIC ACID DEHYDRODIMERS; PECTIC POLYSACCHARIDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
K.W. Waldron et al., "FERULIC ACID DEHYDRODIMERS IN THE CELL-WALLS OF BETA-VULGARIS AND THEIR POSSIBLE ROLE IN TEXTURE", Journal of the Science of Food and Agriculture, 74(2), 1997, pp. 221-228

Abstract

Sugarbeet, a form of Beta vulgaris var vulgaris, fails to soften completely after heating at 100 degrees C for several hours. This is due to thermal stability of the cell-wall polymers involved in cell-cell adhesion. In contrast, beetroot softens within 25-30 min due to a relatively rapid increase in the ability of the cells to separate. Information concerning the cell-wall polymers responsible for cell-cell adhesion was obtained by subjecting sugarbeet and beetroot tissues to a rangeof chemical and biochemical treatments designed to cleave cell-wall chemical bonds selectively. Treatment of sugarbeet tissues with chelating agents, weak base (Na2CO3, 0.05 M) or a purified, specific endoxylanase did not facilitate vortex-induced cell separation. However, this could be induced after extraction in dilute, cold alkali (0.05-0.1 M KOH) or dilute, hot acid (0.1 M TFA, 100 degrees C). Tissues from beetroot behaved similarly. Furthermore, the cell walls of sugarbeet and beetroot were similar in yield and neutral carbohydrate composition; thecell-wall-galacturonic acid content of beetroot was 50% higher as compared with sugarbeet. They were also rich in ferulic acid (FA) and itsderivatives (6-7 mg g(-1) CWM), and exhibited pH-dependent autofluorescence which disappeared during alkali-induced cell separation. In sugarbeet, over 20% of the FA was in dimer form. In beetroot, however, the value was only 10%. The main FA dimers were 8-0-4'DiFA and 8,5'DiFA (benzofuran form). The results indicate that the degree of thermal stability of cell-cell adhesion and, therefore, texture in Beta vulgaris tissues is related to the degree of FA-cross linking between pectic polysaccharides.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 13:56:36