钼对镉胁迫下小白菜镉含量和生理指标的影响

目的]探讨了钼对植物的镉吸收累积及生理方面的影响。方法]以Hoagland营养液为基础,以小白菜为材料,研究了不同钼离子浓度对镉胁迫下小白菜生长、地上部镉累积及全钾、全钠、全氮、全碳及可溶性糖含量的影响。结果]随着钼离子浓度的增加,小白菜株高、最大叶长、最大叶宽、最大叶面积及地上部鲜重和干重均显著低于对照 地下部鲜重和干重呈逐渐降低趋势,但各处理之间差异不显著。小白菜地上部对镉的累积随钼离子浓度的增加呈降低趋势,且与对照差异达显著水平。随钼离子浓度的增加,全钾含量呈增加趋势,且0.10 mg/L钼离子浓度处理与对照差异达显著水平 全钠和全氮含量各处理间差异均不显著 全碳和可溶性糖含量均以0.05mg/L钼离子浓度处理为最低,且与其他处理差异均达显著水平。结论]增加钼离子浓度能降低小白菜对镉的吸收累积,但对小白菜的生长有一定的抑制作用。

Effects of Molybdenum on Cadmium Content and Physiological Indices of Chinese White Cabbage under Cadmium Stress

Objective] The purpose was to discuss the effects of molybdenum on cadmium content and physiological indices of plant under cadmium stress.Method]With Chinese white cabbage as tested material,the effects of molybdenum on the growth, cadmium content and contents of total Kalium,total sodium,total nitrogen,total carbon and solubility sugar under cadmium stress were studied on the basis of Hoagland nutrition.Result]With molybdenum concentrations increasing under cadmium stress,plant height,the largest leaf ...