Assessment of potential soybean cadmium excluder cultivars at different concentrations of Cd in soils.
The selection of cadmium-excluding cultivars has been used to minimize the transfer of cadmium into the human food chain. In this experiment, five Chinese soybean plants were grown in three soils with different concentrations of Cd (0.15, 0.75 and 1.12mg/kg). Variations in uptake, enrichment, and translocation of Cd among these soybean cultivars were studied. The results indicated that the concentration of Cd in seeds that grew at 1.12mg/kg Cd in soils exceeded the permitted maximum levels in soybeans. Therefore, our results indicated that even some soybean cultivars grown on soils with permitted levels of Cd might accumulate higher concentrations of Cd in seeds that are hazardous to human health. The seeds of these five cultivars were further assessed for interactions between Cd and other mineral nutrient elements such as Ca, Cu, Fe, Mg, Mn and Zn. High Cd concentration in soil was found to inhibit the uptake of Mn. Furthermore, Fe and Zn accumulations were found to be enhanced in the seeds of all of the five soybean cultivars in response to high Cd concentration. Cultivar Tiefeng 31 was found to fit the criteria for a Cd-excluding cultivar under different concentrations of Cd in soils.
College of Sciences, Northeastern University, Shenyang 110004, China; School of Medical Devices, Shenyang Pharmaceutical University, Shenyang 110016, China. Electronic address: zhiyang0412@163.com.
Yang
Y
Zhi
MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Kangxin
K
He
College of Sciences, Northeastern University, Shenyang 110004, China.
Ting
T
Sun
Techcomp Scientific Instrument Company Limited, Shanghai 200235, China.
Yongqiang
Y
Zhu
MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. Electronic address: zhouqx@nankai.edu.cn.
Qixing
Q
Zhou
D002104:Cadmium / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D012639:Seeds / Q000737:chemistry; D012989:Soil Pollutants / Q000378:metabolism*; D013025:Glycine max / Q000235:genetics / Q000378:metabolism*
D012989:Soil Pollutants; D002104:Cadmium
Cd-excluding cultivar; Food safety; Glycine max L; Mineral nutrient element