镉胁迫下草莓幼龄期叶、根矿质元素积累和分布的变化

Changes of Mineral Element Accumulation and Distribution in Young Age Strawberry under Cadmium Stress

采用水培实验,研究重金属镉对草莓幼龄期叶、根矿质元素含量和分布的影响。结果表明,高量镉降低草莓根中K、Ca、Mg、P、Cu、Zn、Mn、Fe的积累,叶片相应元素以及B、Mo含量也随镉浓度增大而呈降低趋势;但镉浓度较低时,K、Mg、P、Zn在叶、根中的含量均增加,而后才随镉处理浓度提高而降低。在镉胁迫下,同一元素在草莓叶、根之间的分布也受到影响,而且某些矿质元素含量间有显著相关性。

Changes of mineral element accumulation and distribution in leaves and root of young age strawberry under cadmium stress were investigated by hydroponic experiment. The results showed that the accumulation of mineral elements in strawberry root, such as K, Ca, Mg, P, Cu, Zn Mn and Fe, was reduced under stress of high concentration cadmium. Similarly, contents of K, Ca, Mg, P, Cu, Zn, Mn, Fe, B and Mo in strawberry leaves decreased with the increase of cadmium concentration. However, contents of some mineral elements, such as K, Mg, P and Zn in both strawberry leaves and root increased at low cadmium concentration. Mineral element distribution in strawberry changed under cadmium stress. Also, contents of some mineral elements were significantly correlated to each other.