Amylopectin chain length distribution in grains of japonica rice as affected by nitrogen fertilizer and genotype

Yang Xiaoyu Bi Junguo Gilbert Robert G. Li Gang-Hua Liu Zhenghui WANG Shao-hua Ding Yanfeng · 2016

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支链淀粉精细结构

粳稻

氮

理化性质

期刊名称：

Journal of Cereal Science 2016 年 71 卷

发表日期：

2016.09.01

摘要：

This study investigated the chain length distribution (CLD) of two japonica rice cultivars under six nitrogen (N) treatments by high performance size exclusion chromatography, with the aims to elucidate the effect of N on rice quality and its biological mechanism. Results showed significant influence of N on CLD. In comparison with low N rate, high N lowered the percentage of short amylopectin branches. Fitting with the CLD model of Wu-Gilbert, it suggested that relative activity of SBE to SS was lower at high N rate, thus producing fewer short amylopectin branches. Comparison of CLD between N rates and between cultivars revealed that decrease in short amylopectin branches or the relative ratio of short to long amylopcetin branches correlated with increase in flour gelatinization temperatures (T