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| Uptake and transport characteristics of cadmium and nutrients in different varieties of maize（Zea mays）at seedling stage |
| Received:August 31, 2022 |
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| KeyWord:maize variety;cadmium;absorption;transport;nutrient element |
| Author Name | Affiliation | E-mail | | FAN Yu | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | ZHUANG Zhong | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | ZHAO Lijie | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | ZHANG Chen | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | WANG Qi | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | LI Huafen | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | WAN Yanan | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | wanyanan@cau.edu.cn |
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| Abstract: |
| With the development of mining, metallurgy, industry, and agriculture, soil cadmium contamination has become increasingly serious. Screening of low accumulation varieties is an effective method to reduce cadmium in crops and its intake by humans. The uptake and transport characteristics of cadmium and its correlation with other nutrient elements in 24 maize varieties were studied through hydroponic experiments. The results showed significant differences in the uptake, transport, and accumulation of cadmium among different varieties of maize. The cadmium content in the shoot and root ranged from 40.8 μg·g-1 to 83.8 μg·g-1（dry weight）and from 544 μg·g-1 to 1 204 μg· g-1（dry weight）, respectively, with one time difference. The transport factor ranged from 0.060 to 0.297, with a difference of approximately four times. There was a significant positive correlation between cadmium content in shoot and cadmium content in root, and also between cadmium content in shoot and transport factor. All varieties were clustered and divided into three different cadmium accumulation types, and 11 types of maize were selected as low cadmium accumulation types. In addition, the cadmium content in the shoot exhibited significant negative correlations with phosphorus, manganese, and iron. Among 11 maize varieties with low cadmium accumulation, three with calcium accumulation, eight with magnesium accumulation, and one with zinc accumulation, two maize varieties （Weike 702 and Denghai 652）with low accumulation of cadmium and easy accumulation of nutrients were selected. |
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