Ca/GA对渗透胁迫下小麦种子萌发中蛋白质变化的调节

小麦萌发时，种子胚乳总蛋白含量逐渐下降，其中由于提供萌发所需氮化物球蛋白，醇溶蛋白和谷蛋白逐渐减少，合成数种启动种子萌发所需酶蛋白等的清蛋白逐渐增加，胚中蛋白质各组分随种子萌发过程垃逐渐增加，渗透胁迫下，萌发种子胚乳清蛋白和胚中蛋白质中组分的增加，以及胚乳中球蛋白，醇溶蛋白和谷蛋白的降解均受抑制，因此，种子萌发与其基因蛋白质密切相关，Ｃａ处理在萌发后期才对种子蛋白质变化起促进作用，ＧＡ和Ｃａ＋ＧＡ

Regulation of Ca/GA on Changes of Protein during Wheat Seed Germination under Osmotic Stress

Total protein content in wheat endosperm gradually declined during seed germination, but the contents of globulin, prolamin and glutelin decreased due to supplying nitrogen for germination, and the content of albumin gradually increased because of several kinds of enzymes synthesized for promoting seed germination. All protein composition gradually in creased in embryo. Under osmotic stress the increment of albumin in endosperm and all protein composition in embryo, and the degradation of globulin, prolamin and glutelin in endosperm were inhibited. Therefore wheat seed germination conditions were closely correlated with protein changes. Ca treatment was effective at the late stage of germination. Germination process was promoted using GA or Ca GA treatment after seed germination. The Ca/GA treatments, pos sessed buffering effect for osmotic stress during seed germination via seed protein regulation. The GA or Ca GA treatment was superior to Ca treatment.