Genotypic Differences of Microelements Concentrations among Cultivars of Spinach Exposed to Cadmium

The genotypic differences and effects on cadmium(Cd) concentrations and accumulations in spinach(Spinacia oleracea) growth were studied.The effects of cadmium absorption and accumulation on the physiological metabolisms were analyzed.It was shown that sixteen cultivars of spinach were grown in the nutrient solutions containing 10 mg/ml of cadmium in order to investigate genotypic differences in the effects of cadmium exposure during the plant growth.Cadmium concentrations in spinach ranged from 129.69 to 290.15 μg/g DW in shoots and from 87.26 to 1 487.67 μg/g DW respectively in roots after exposed in cadmium.Moreover,cadmium mainly accumulated in the roots.And it also caused some changes in uptake genotypic differences of cadmium concentrations and accumulations in both shoots and roots were observed among and distribution of nutrients in spinach.Under the influence of cadmium,the concentration of zinc(Zn) decreased in shoot and the concentration of manganese(Mn) and zinc(Zn) increased in roots.In addition,cadmium exposure resulted in an increase in ferrum(Fe) concentrations in both shoots and roots.