期刊论文

中文

中国农业科学

0578-1752

2013

46

14

2869-2879

10.3864/j.issn.0578-1752.2013.14.003

国家自然科学基金项目（30900874,30971745）； 湖南省自然科学基金项目（11JJ3026）； 湖南省教育厅基金项目（YB2009B023）； 湖南省科技计划博士后项目（2012RS4037）；

本校为第一机构

【目的】研究抽穗结实期不同时段高温处理对稻米品质的影响,阐明高温对稻米品质的影响机理及其时段效应。【方法】选用耐热性不同的两个水稻品系,利用人工气候室进行抽穗结实期不同时段温度试验,研究抽穗结实期高温对稻米外观品质、加工品质、直链淀粉含量、胶稠度、蛋白质含量、RVA特征谱、Mg/K及籽粒的淀粉粒结构的影响。【结果】抽穗结实期高温使两品系稻米长宽比变小,垩白粒率和垩白度增加,糙米率、精米率、整精米率降低,直链淀粉含量和蛋白质含量增加,胶稠度降低;淀粉RVA谱特征值崩解值降低,冷胶粘度、消减值和糊化温度升高,峰值时间延长,Mg、K含量增加,Mg/K比值降低;淀粉粒扫描电镜显示,高...

[ Objective ] The effects of high temperature treatment at different times during heading and filling periods on rice quality were studied to ascertain the mechanism of the effect of high temperature on rice quality and its time effect. [Method] The experiment was conducted with two rice lines, the heat-tolerant line 996 and heat-sensitive line 4628, in controlled environment chambers to investigate the effect of high temperature stress at different times during heading and filling stages on rice appearance quality, milling quality, amylose content, gel consistency, protein content, RVA charac...