Chemical characterization of pectin from green tea (Camellia sinensis)

被引：38
|
作者：
Ele-Ekouna, Jean-Pierre [1 ]
Pau-Roblot, Corinne [1 ]
Courtois, Bernard [1 ]
Courtois, Josiane [1 ]
机构：
[1] Univ Picardie Jules Verne, IUT Amiens, Dept GB, Lab Polysaccharides Microbiens & Vegetaux, F-80025 Amiens, France
来源：
CARBOHYDRATE POLYMERS | 2011年 / 83卷 / 03期
关键词：
Green tea; Camellia sinensis; Pectin; Homogalacturonan; Esterification; Polyphenol; SUGAR-BEET PECTIN; PLANT-CELL-WALLS; POLYPHENOLS; ANTIOXIDANT; POLYSACCHARIDES; QUANTIFICATION; INGREDIENTS; FLAVONOIDS; COHESION; HEALTH;
D O I：
10.1016/j.carbpol.2010.09.028
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
From green tea leaves, two distinct pectin fractions were obtained based on their solubility in water. Polyphenols were detected only in the easily water soluble fraction (P1). The estimated uronic acids/neutral sugars ratio was 1.7 in the easily water soluble pectin fraction (P1), and 1.0 in the less water soluble fraction (P2). Homogalacturonan sequences (HGAs) corresponded to about 62% of the P1 pectin fraction but only 47% of the P2 fraction. After degradation of the two pectin fractions by pectin lyase, chemical studies revealed rhamnogalacturonan RG I and RG II regions present in the P1 pectin fraction, whereas only RG I sequences were detected in the P2 pectin fraction. The degree of substitution was lower for HGAs of the P1 pectin fraction than P2. Different acetylation patterns for the two fractions were observed. Polyphenols extracted simultaneously with pectins were present only in HGA fractions from P1. (c) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1232 / 1239
页数：8
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