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林产化学与工业 ›› 2008, Vol. 28 ›› Issue (3): 55-60.

• 论文 • 上一篇    下一篇

杨梅不同部位单宁含量与结构研究

李敏1, 向平1, 杨志伟1,2, 向成1, 林鹏1,2, 林益明1,2   

  1. 1. 厦门大学, 生命科学学院, 福建, 厦门, 361005;2. 厦门大学, 湿地与生态工程研究中心, 福建, 厦门, 361005
  • 收稿日期:2007-05-29 修回日期:1900-01-01 出版日期:2008-06-30 发布日期:2008-06-30
  • 通讯作者: 林益明,博士生导师,研究领域:植物生态学; E-mail:linym@xmu.edu.cn。

Content and Structure of Tannins in Different Parts of Bayberry(Myrica rubra(Lour.)Sieb.et Zucc.)

LI Min1, XIANG Ping1, YANG Zhi-wei1,2, XIANG Cheng1, LIN Peng1,2, LIN Yi-ming1,2   

  1. 1. Department of Biology, School of Life Sciences, Xiamen University, Xiamen 361005, China;2. Research Centre for Wetlands and Ecology Engineering, Xiamen University, Xiamen 361005, China
  • Received:2007-05-29 Revised:1900-01-01 Online:2008-06-30 Published:2008-06-30

摘要: 对杨梅的叶、枝和树皮的总酚含量与可溶缩合单宁含量进行了测定,并利用基质辅助激光解吸附飞行时间质谱(MALDI-TOF MS)详细研究了不同部位中缩合单宁的类型、聚合度及聚合物的分布情况.结果表明:树皮的总酚含量最高(43.5%),叶次之(34.9%),枝最低(18.53%);树叶的可溶缩合单宁含量最高(25.7%),皮次之(17.93%),枝最低(8.01%);3组分的缩合单宁都以(表)桔儿茶素-3-O-棓酸酯(EGCG/GCG)为基本结构单元的原翠雀定,且大部分聚合物的结构单元之间存在A型和B型两种连接方式,但其中叶和枝缩合单宁的聚合度要大于树皮.

关键词: 杨梅, 多酚, 缩合单宁, 基质辅助激光解吸附飞行时间质谱, 多聚物

Abstract: Contents of total phenolics and extractable condensed tannins in leaves, branches and bark of Myrica rubra (Lour.) Sieb. et Zucc. were determined. In addition, type of condensed tannins, degree of polymerization and distribution of polymer were characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The results were showed as follows: total phenolics content was the highest in bark (43.56%), followed by leaves(34.69%), and then branches(18.53%); while extractable condensed tannins content was the highest in leaves(25.67%), followed by bark(17.93%), and then branches(8.01%). Epigallocatechin-3-O-gallate was invariably the basic unit occurring in the three condensed tannins. A-type and B-type linkages were the common types among the structural units of polymers. Meanwhile tannins in leaves and branches had the larger highest polymerization degree than bark.

Key words: Myrica rubra (Lour.) Sieb. et Zucc., polyphenolics, condensed tannin, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, polymerization

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