高温及穗肥对水稻子粒蛋白质积累动态的影响  

Influence of High Temperature Stress on Dynamic Accumulation of Rice Grain Protein under Different Earing Fertilization

作　　者：马启林[1,2] 李阳生[1] 鄢圣之[2] 雷慰慈[2] 

机构地区：[1]武汉大学生命科学学院,武汉430072 [2]长江大学农学院,荆州434103

出　　处：《湖北农业科学》2008年第11期1228-1231,共4页Hubei Agricultural Sciences

基　　金：中国博士后科学基金项目(20070420934);湖北省国际科技合作重点项目(2007CA018)

摘　　要：在穗肥施用和未施用条件下对灌浆期水稻进行了高温胁迫处理,对稻米蛋白质各组分的积累动态进行了分析。穗肥的施用显著提高了成熟期稻米粗蛋白的含量,但对蛋白质各组分相对含量的影响不显著。在N0和N2两个穗肥水平下,35℃高温处理均提高了子粒灌浆速度,明显降低了子粒单粒重;35℃高温处理还使谷蛋白的两个亚基的含量较25℃处理分别降低12.1%和5.7%,使醇溶蛋白含量分别降低6.7%和4.9%,同时却使谷蛋白组分中57kD及以上多肽的积累分别增加18.8%和11.7%,且子粒的粗蛋白含量也分别增加0.56%和0.35%。对高温下谷蛋白聚合体大量积累的原因及其对稻米品质的可能影响进行了分析。High temperature treatment during filling stage with and without eating fertilization was conducted in the present research for the analysis of the influence of high-temperature stress on protein content and its components of rice grain. Earing fertilization obviously increased crude protein content of matured grain, but the comparative content of its components was not remarkable change. Under two levels of earing fertilization （NO and N2）, compared with 25℃ treatment, heat stress （35 ℃ ） accelerated the grain filling and resulted in less grain weight, and also reduced the two glutelin subunits content of both fertilization treatments 12.1% and 5.7% respectively, and reduced the prolamin content of them 6.7% and 4.9% respectively. Simultaneously, the polypeptides above 57 kD was increased 18.8% and 11.7% respectively, and grain crude protein content was also increased 0.56% and 0.35% respectively. The possible mechanism of the massive accumulation of glutelin polymer and its influence to rice grain quality was discussed

关 键 词：水稻 灌浆期 高温胁迫 贮藏蛋白 稻米品质 

分 类 号：S511[农业科学—作物学]