铕对小麦根细胞钙调素及NAD激酶的影响研究

研究了Eu对小麦根细胞内钙调素的含量和活性以及对受钙调素调控的专一性酶NAD激酶的影响。结果表明，Eu^3＋有类似Ca^2＋的作用，影响受Ca^2＋浓度调控的信号系统关键蛋白——钙调素的活性和含量变化。从而引起钙调素调控酶NAD激酶的活性改变，最终影响细胞内生理生化过程。认为稀土离子对生物体的Hormesis效应町能与稀土离子对细胞信号传递系统的影响有关，稀土离子可能通过影响细胞信号系统来调节细胞内的各种生理生化变化，形成稀土元素生物效应的多样性特征。

Effects of Europium on Calmodulin and Nadkase in Wheat Root Cells

The content and the activity of calmodulin in wheat root cell influenced by the rare earth element Eu were determined.The activity of NAD kinase specially regulated by calmodulin was measured at the same time.The results show that the Eu~(3+) can simulate the function of Ca~(2+) to affect the content and the activity of calmodulin.The most important protein is regulated by Ca~(2+) in signal transport system,which consequently influences the NAD kinase activity and finally results in the changes of physiological courses in wheat root cells.The research considers that the hormesis effect of rare earth ion in cell should be related probably to its effect on the signal transport system of cells.The rare earth ions possibly influence cell physiology through signal transport system.