Structural and functional properties of indica rice starch as influenced by late-stage nitrogen fertilization

文献类型： 外文期刊

第一作者： Teng, Bin

作者： Teng, Bin;Xi, Min;Du, Shiyun;Zhou, Yongjin;Zhang, Ying;Luo, Zhixiang;Wu, Wenge;Zhang, Yuexiong

作者机构：

关键词： Rice; nitrogen; crystalline structure; starch molecular structure; functional properties

期刊名称：INTERNATIONAL JOURNAL OF FOOD PROPERTIES （ 影响因子：2.727； 五年影响因子：2.938 ）

ISSN： 1094-2912

年卷期： 2021 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Late-stage nitrogen (N) fertilization is an important crop management for improving rice production and also affects the quality of rice, whereas information on the influence of late N on structural and functional properties of indica rice starch is lacking. In this study, effects of various N rates (0, 60, and 120 kg ha(-1) referred to as N-0, N-60 and N-120, respectively) on structural and functional properties of grain starches from two rice cultivars (OM052 and Chaoyou1000) were investigated. Comparison of different N treatments showed that late N application exhibited strong influence on starch properties, and the sensitivity to N application varied with rice genotypes. Compared to non N rate, higher input of N (N-60 for OM052, and N-120 for Chaoyou1000) significantly reduced apparent amylose content (AAC), relative crystallinity (RC), gelatinization enthalpy, swelling power, solubility and degree of hydrolysis, but significantly increased the proportion of short chains with degree of polymerization 6-12 in amylopectin and gelatinization onset temperature. Further comparison and principal component analyses revealed that the variations in the starch functional properties were due mainly to the changes in RC. The solubility was positively associated with AAC. The present results can provide important information for understanding the environmental regulation of starch biosynthesis in rice grain.

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