Resistant Starch Granules RS2 in Rice Varieties Basmati 370 and Koshihikari

Abstract

Abstract: The components and chain length distribution of resistant starch granules RS2 in a high quality indica rice Basmati 370 and a high quality japanica rice Koshihikari were studied. The RS2 components of the two varieties were mostly amylose, and the results analyzed by the Size Exclusion Chromatography (SEC) indicated that the amylose included not only the amylose linear chains but also the branched amylose chains and the long chains of amylopectin. Analysis on chain length distribution of RS2 branched chains showed that for both the two varieties, the proportion of long chains(Degree of polymerization＞36) were more than 26%.

Key words: rice, resistant starch granule, starch structure, chain length distribution

摘要： 以一个优质籼稻品种 Basmati 370 和一个优质粳稻品种 Koshihikari （越光）为材料，研究了抗性淀粉颗粒RS2的来源和链长分布情况。结果表明，两个品种RS2的主要来源均为直链淀粉，体积排阻色谱SEC的分析结果表明这部分直链淀粉不仅包括真正的直链淀粉，还包括了带分支的直链淀粉和带长分支链的支链淀粉。对抗性淀粉颗粒RS2的支链链长分析表明，2个品种长链(聚合度＞36)所占的比例均大于26%。

关键词: 水稻, 抗性淀粉颗粒, 淀粉结构, 链长分布

JIAO Guiai ,TANG Shaoqing,LUO Ju,WU Dianxing,HU Peisong. Resistant Starch Granules RS2 in Rice Varieties Basmati 370 and Koshihikari [J]. Chinese Journal of Rice Science.

焦桂爱唐绍清, 罗炬,吴殿星胡培松,. 水稻品种Basmati 370和Koshihikari 抗性淀粉颗粒RS2的研究[J]. 中国水稻科学.

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