INSOLUBLE ELLAGITANNINS IN CASTANEA-SATIVA AND QUERCUS-PETRAEA WOODS
INSOLUBLE ELLAGITANNINS IN CASTANEA-SATIVA AND QUERCUS-PETRAEA WOODS
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DOI：
10.1016/0031-9422(91)85250-4
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发表时间：
1991-01-01
期刊：
影响因子：
3.8
通讯作者：
MONTIES, B
中科院分区：
文献类型：
--
作者：
PENG, S;SCALBERT, A;MONTIES, B
用丙酮水溶液对甜板栗（Castanea sativa）和无柄栎（Quercus petraea）的边材和心材样品进行浸提。通过Folin-Ciocalteu方法和测定酸降解后形成的鞣花酸，估计了提取物和提取残留物中的鞣花单宁。发现鞣花单宁在两个物种的心材中以可比的浓度（约10%DM）积累。可溶性鞣花单宁的浓度随着年龄的增长从心材的外围到中心缓慢下降。这种减少是平衡的不溶性鞣花单宁，导致可能从缓慢的氧化聚合或与细胞壁的可溶性鞣花单宁成分共聚的等效增加。
Sapwood and heartwood samples of sweet chestnut (Castanea sativa) and sessile oak (Quercus petraea) were extracted with aqueous acetone. Ellagitannins were estimated in both extracts and extraction residues, by the Folin-Ciocalteu method and by determination of ellagic acid formed after acid degradation. Ellagitannins were found to accumulate in comparable concentrations (ca 10% DM) in the heartwoods of both species. The concentrations of soluble ellagitannins slowly decreased from the periphery to the centre of the heartwood as it ages. This decrease was balanced by an equivalent increase of insoluble ellagitannins, resulting probably from the slow oxidative polymerization or copolymerization with cell-wall components of soluble ellagitannins.