Zn、Cd及其复合对小麦幼苗吸收Ca、Fe、Mn的影响

Effect of Zn^( 2+),Cd^(2+)and their combined on Ca,Fe and Mn uptake by wheat seedlings.

研究了溶液培养条件下Cd、Zn及其复合对小麦幼苗吸收Ca、Fe、Mn的影响 .结果表明 ,小麦幼苗对Zn、Cd的吸收随溶液中Cd2 +、Zn2 +浓度的升高而增加 ,Cd、Zn同时存在时与其单独作用时幼苗对它们的吸收不同 ,Zn影响幼苗对Cd的吸收 ,Cd对Zn的吸收起抑制作用 .Ca、Mn的吸收随溶液中Cd2 +、Zn2 +浓度升高而呈下降趋势 ,在Cd单独处理组和Zn单独处理组中Fe的吸收随Cd2 +、Zn2 +浓度升高而增加 ,但在Zn +Cd处理组中 ,Fe的吸收则呈下降趋势 ,其效应方式还与作物具体部位有关 .

The effect of Zn,Cd and their combination on Ca,Fe and Mn uptake by wheat seedlings was studied with solution culture.The result shows the Zn and Cd contents of wheat increased with increasing concentrations of Zn 2+ and Cd 2+ in solution,while there was a difference between single and compound treatments.Zn affected Cd uptake by wheat,and Cd inhibited Zn uptake.The uptake of Ca and Mn reduced with the increase of Zn 2+ and Cd 2+ in solution.The uptake of Fe increased with increasing Zn 2+ and Cd 2+ concentrations in single treatment,while decreased in compound treatment.The interactive effect of Zn and Cd was also related to the parts of plants.