摘要
稻米蛋白质的含量及组成是稻米品质和营养价值的重要指标,它既受遗传因素控制,也受到环境和栽培技术的影响。穗肥的施用明显提高了成熟期稻米粗蛋白的含量,但对各组分之间相对含量的影响不显著。高温胁迫处理较大程度改变了贮藏蛋白质组分的积累动态过程,包括57 kD以上多肽在内的溶于稀酸或稀碱的组分(被认为是谷蛋白的前体物质和谷蛋白聚合体),从灌浆一开始就维持在较高水平,高温胁迫后成熟的种子中谷蛋白多以高分子的聚合体状态存在,谷蛋白单体含量及醇溶蛋白含量降低。
The content and composition of storage protein, which were controlled by genetic factors, environment and cultivation techniques, are important index to evaluate rice quality and nutrition value. Panicle fertilizer obviously enhanced crude protein content of matured rice grain, but the impact on the relative content of each component was not significant. High temperature stress significantly changed the dynamic process of the accumulation of storage proteins components, the components soluble in dilute acid or dilute alkali, including more than 57 kD polypeptides （which is considered a precursor of glutelin or protein polymer）, maintained a high level from the beginning of filling stage. After high temperature stress, the glutelin of matured seeds were existed in state of high molecular polymer, and the contents of glutelin monomer and prolamin were reduced.
出处
《中国稻米》
2014年第2期23-24,共2页
China Rice
基金
国家自然科学基金(31160259)
转基因作物重大专项(2009ZX08001-020B)
海南大学科研启动基金(kyqd1045)
关键词
水稻
灌浆期
高温胁迫
贮藏蛋白
稻米品质
rice
filling stage
high temperature stress
storage protein
rice quality
