夏玉米不同粒位蛋白质组分氮素效应及与子粒脱水的关系研究

从蛋白质粒位差异的角度,以不同自然脱水类型玉米品种为材料,分析不同氮肥运筹处理下不同部位子粒蛋白质组分含量、子粒脱水速率,研究子粒脱水与蛋白质组分和氮素施用的关系。结果表明,脱水速率差异较大的品种总蛋白质存在较大差异,蠡玉16和先玉335总蛋白质含量分别为11.25%、12.16%。增施氮肥蛋白质含量明显增加;增施氮肥主要增加了醇溶蛋白和谷蛋白含量,清蛋白和球蛋白含量影响较小。增施氮肥生理成熟后不同处理间脱水速率存在显著差异;蛋白质组分和脱水速率之间存在密切关系,先玉335生理成熟后不同部位间醇溶蛋白和谷蛋白与脱水速率呈显著或极显著负相关,醇谷比与子粒脱水呈正相关。

Nitrogen Effect of Different Grain Protein Fractions in Summer Maize and Its Relationship with Grain Dehydration

To clarify the relationship between maize dehydration and protein component as well as nitrogenous fertilizer application, from the perspective of the difference of protein grain position effect, different types of natural dehydration maize cultivars as material, to analysis the protein component content, grain dehydration rate of different parts of the grain after flowering. The results showed that there was a big difference between the different varieties of dehydration rate of total protein, Liyu 16 and Xianyu335 varieties of total protein content were 11.25% and 12.16%, respectively. Nitrogen fertilization mainly increased gliadin and glutenin content, has little effect on albumin and globulin content. Nitrogen physiological maturity among different treatments of dehydration rate have significant difference. There was a close relationship between different protein components and dehydration rate, especially the first 335 varieties of jade, after physiological maturity in different parts of the protein components, especially gliadin and glutenin and dehydration rate were significant or extremely significant negative correlation; valley ratio correlated with grain alcohol dehydration positive relationship.