食品科学 ›› 2010, Vol. 31 ›› Issue (9): 12-15.doi: 10.7506/spkx1002-6630-201009003

• 基础研究 • 上一篇    下一篇

淀粉的支链精细结构与消化性能

缪 铭,张 涛,沐万孟,江 波,金征宇   

  1. 江南大学 食品科学与技术国家重点实验室
  • 收稿日期:2009-10-11 修回日期:2010-01-05 出版日期:2010-05-01 发布日期:2010-12-29
  • 通讯作者: 缪铭 E-mail:miao_ming@126.com
  • 基金资助:

    国家自然科学基金项目(20976073);“十一五”国家科技支撑计划项目(2006BAD05A07-A-02);
    江苏省自然基金创新学者攀登项目(BK2008003);江南大学食品科学与技术国家重点实验室目标导向
    资助项目(SKLF-MB-200804);江南大学自主科研计划资助项目(JUSRP10930)

Relationship between Fine Structure of Amylopectin and Digestibility from Cereal Starch

MIAO Ming,ZHANG Tao,MU Wan-meng,JIANG Bo,JIN Zheng-yu   

  1. State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
  • Received:2009-10-11 Revised:2010-01-05 Online:2010-05-01 Published:2010-12-29
  • Contact: MIAO Ming E-mail:miao_ming@126.com

摘要:

采用高效液相排阻色谱技术探索不同淀粉中支链淀粉精细结构与其慢消化性能的关系。结果表明:支链淀粉结构中的链长分布Fr Ⅰ(DP > 30)、Fr Ⅱ(13 < DP < 30)均与慢消化淀粉(SDS)呈极显著正相关(r = 0.909,P <0.05;r = 0.847,P < 0.05);Fr Ⅲ(DP < 13)与SDS 呈极显著负相关(r= - 0.869,P < 0.05)。支链淀粉的分支链长分布与淀粉低血糖特性关系密切,可采用基因工程调控淀粉链合成从而开发高营养品质的新淀粉品种。

关键词: 支链淀粉, 精细结构, 慢消化性, 链长, 低血糖生成指数

Abstract:

The correlation between starch digestibility and fine structure of amylopectin was investigated in this study. Slowly digestible starch (SDS) fraction was positively correlated (r = 0.909, P < 0.05; r = 0.847, P < 0.05) with FrI (DP > 30) and FrII (13 < DP < 30), respectively, and negatively correlated (r = - 0.869, P < 0.05) with FrIII (DP < 13). Thus, the chain length distribution of debranched amylopectin exhibited a relationship with low glycemic index. These investigations revealed a molecular basis of fine structural variability in amylopectin for starch digestion property and could provide a strategy to develop raw starch materials with high nutritional value.

Key words: amylopectin, fine structure, digestibility, chain length, low glycemic index

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