孕穗期低温对小麦籽粒蛋白质及其组分含量的影响
毕业论文关键词：小麦；孕穗期；低温胁迫；蛋白质；蛋白组分
Effect of Cold Stress during Booting Stage on the Concentrations of Grain Protein and Its Components of Wheat
Abstract： Climate change has resulted in a continuous increase in the frequency, intensity, and duration of extreme cold stress events. Cold stress is one of the major environmental stresses, which have serious effects on wheat grain quality. Understanding and quantifying the responding mechanism of grain quality formation to cold stress will provide theoretical guidance for wheat grain quality improvement. Environment-controlled phytotron experiments under different low temperature levels and durations at booting stage were conducted to investigate the impacts of simulated cold stress on the concentrations of grain protein and its components of wheat. The results showed that, the contents of grain protein and its components varied with the low temperature levels and durations. The low temperature during the booting stage increased the contents of total protein, albumin and glutelin, while decreased the contents of globulin for both Yangmai16 and Xumai30. Under 2 days of low temperature treatment, the contents of gliadin showed the increasing trends with the low temperature for both cultivars, while during the 4 and 6 days of low temperature treatments, the contents of glutelin showed the decreasing trends. Moreover, the grain protein and its components contents were more sensitive to low temperature levels than low temperature durations. In addition, for every 1˚C•d increase of ACDD at booting, the contents of total protein, albumin, globulin, gliadin and glutelin of Yangmai16 and Xumai30 increased by 0.41% and 0.48%, 0.96% and 1.26%, 2.12% and 0.98%, -0.38% and 0.62%, and -1.87% and -1.00%, respectively.
Key words: wheat；booting stage；cold stress；grain protein；protein components
目 录
摘要1
关键词1
Abstract1
Key words1
引言1
1 材料与方法2
1.1 试验材料 2
1.2 试验设计 3
1.3 测试指标与方法 .3
1.4 累积低温度日的计算方法 .4
1.5 数据分析方法 .4
2 结果与分析5
2.1 孕穗期不同低温水平对小麦籽粒蛋白质及其含量组分的影响5
2.1.1 孕穗期不同低温水平对小麦籽粒总蛋白含量的影响5
2.1.2 孕穗期不同低温水平对小麦籽粒清蛋白含量的影响6
2.1.3 孕穗期不同低温水平对小麦籽粒球蛋白含量的影响6
2.1.4 孕穗期不同低温水平对小麦籽粒醇溶蛋白含量的影响8
2.1.5 孕穗期不同低温水平对小麦籽粒谷蛋白含量的影响9