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| Differences in cadmium accumulation and translocation in different Zea mays cultivars |
| Received:October 15, 2018 |
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| KeyWord:Zea mays cultivars;cadmium;accumulation |
| Author Name | Affiliation | E-mail | | DENG Ting | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Guangdong Jingdi Planning Technology Co., Ltd, Guangzhou 510630, China | | | WU Jia-long | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | | LU Wei-sheng | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | lws2869@scau.edu.cn | | GUAN Yi-zhan | Qujiang District Agricultural Research Institute, Shaoguan 512100, China | | | LI Gui-jie | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | | ZHANG Qiu-hua | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | | YU Fang-yu | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | | ZENG Zu-lei | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | |
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| Abstract: |
| The objectives of this study were to further test and verify the high and low Cd accumulation in maize cultivars screened in previous studies. A field experiment was conducted to discuss the differences in the characteristics of Cd accumulation and transport in six maize cultivars. The results showed that there were significant differences in root and shoot biomass, Cd content in roots, stems, and leaves, and in the Cd accumulation coefficients, accumulation, and total accumulation of the six maize cultivars during the silking and maturity stages (P<0.05). During maturity stages, the Cd contents in shoots of Huacainuo 3 and Guanghongnuo 8 were 16.38 mg·kg-1 and 13.64 mg·kg-1, the accumulation coefficients were 7.45 and 6.20, the transfer coefficients were 1.88 and 3.02, respectively. The contents of Cd in grain in Huacainuo 3 and Guanghongnuo 8 were 0.65 mg·kg-1 and 0.63 mg·kg-1, respectively, which were far exceeding national food hygiene standards (GB 2762-2017) and feed hygiene standards (GB 13078-2017). The Cd accumulation coefficients in shoots of Yuecainuo 2, Huayu 8 and Guangzinuo 6 were 2.07, 1.39 and 1.85, respectively. And their contents of Cd in grain were 0.19, 0.17 and 0.15, respectively, which were higher than the national food hygiene standards but lower than the national feed health standard. The accumulation coefficients of shoots and grain of Zhongnuo 1 were 1.85 and 0.032, respectively, and its Cd content in grain was 0.07 mg·kg-1, which did not exceed the national food hygiene standard. Our results indicated that Huacainuo 3 and Guanghongnuo 8 could be used as high-accumulation maize cultivars but not for food or feed, while Zhongnuo 1 could be used as a high-accumulation maize cultivar for food or feed. |
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