硒对镉胁迫下水稻幼苗叶片元素含量的影响

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

摘要: 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Ca、Mg、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Ca、Mg、Fe 、Mn含量高于单用Cd处理，Se与Cd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。

Abstract: 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 （5.0～10.0mg/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.