硒对镉胁迫下水稻幼苗叶片元素含量的影响

Effects of Se on some element contents in leaves of rice seedling under Cd stress

采用溶液培养研究Se对Cd胁迫下水稻幼苗叶片叶绿素和几种元素含量的影响结果表明，单用Cd处理，高浓度Cd使水稻幼苗叶片CaMg、Fe．Zn、Mn含量显著减少；单用0．10mg／L Se处理可显著增加叶片Fe、Zn、Mn含量。Se使较高浓度Cd（5．0～10．0mg／L）胁迫下水稻幼苗叶片CaMg、Fe、Mn含量高于单用Cd处理，Se与CA的互作效应影响叶片Ca、Mg、Fe、Zn、Mn含量。叶绿素a／b值不能作为水稻幼苗Cd毒害指标。

Nutrient solution culture experiment was conducted to study the effects of Se on some element and chlorophyll contents in leaves of rice seedling under Cd stress. The results indicate that under a high concentration of Cd stress without Se supply, the Ca, Mg, Fe,Zn, Mn contents decrease while under a single treatment of 0.10mg/L Se, the Fe,Zn, Mn contents can increase in leaves significantly. The addition of Se to the solution with Cd （5.0- 10.0rag/L） can increase the Ca, Mg, Fe, Mn contents, and Ca, Mg, Fe, Zn, Mn contents are affected by the interaction of Se and Cd. The value of chl. a/b ratio can not be taken as the index of Cd poison to rice seedling.