花后灌溉对小麦籽粒贮藏蛋白聚合程度和面团流变学特性的影响

为了明确灌溉麦黄水引起的小麦(Triticum aestivum)面团流变学特性劣变与籽粒贮藏蛋白聚合程度变化之间的关系, 在防雨池栽条件下, 以‘济麦20’为供试品种, 设置花后不灌水(W0), 花后灌1水(花后14 d, W1)和花后灌2水(花后14 d和花后28 d, W2) 3个处理, 分析了花后灌水对籽粒产量、贮藏蛋白聚合程度相关参数及其面团流变学特性的影响。研究结果表明, 籽粒产量、面团形成时间和稳定时间均以花后灌1水时达到最优, 再增加一次灌水(麦黄水), 导致面团形成时间和稳定时间显著缩短, 筋力变弱。同时观察到谷蛋白聚合指数和谷蛋白大聚合体平均粒径也因灌麦黄水而显著降低。回归分析表明, 灌麦黄水条件下谷蛋白大聚合体粒径变小是导致面团流变学特性变差和筋力变弱的主要原因。

Effects of post-anthesis irrigation on degree of polymerization of storage protein and rheological properties in wheat

Aims Our objective was to verify the relationship between worsening dough rheological properties caused by pre-harvest irrigation and degree of polymerization of storage protein in wheat.Methods We applied three irrigation regimes (none,14 days after anthesis and both 14 and 28 days after anthesis) to the Jimai 20 cultivar of wheat and examined effects on grain yield,parameters representing polymerization of storage protein and dough rheological properties.Important findings Grain yield was highest and both...