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| Effects of foliar modulators on cadmium accumulation and transport of nutrient elements in rice |
| Received:July 06, 2018 Revised:September 05, 2018 |
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| KeyWord:rice;cadmium;malic acid;nutrient elements;foliar application |
| Author Name | Affiliation | E-mail | | ZHANG Shuo | Research Center of Agro-Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | LU Zhong-yan | Guangxi Subtropical Crops Research Institute, Nanning 530001, China | | | TANG Qi | Research Center of Agro-Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | LI Hua-xin | Research Center of Agro-Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | ZHANG Chang-bo | Research Center of Agro-Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIU Zhong-qi | Research Center of Agro-Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | liuzhongqi508@163.com |
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| Abstract: |
| To explore the mechanism of foliar regulators in decreasing the uptake of cadmium (Cd), the effects of foliar application with malic acid, manganese, and zinc, at the anthesis stage, on cadmium accumulation in grains and other organs of rice plants were studied. The results showed that Cd concentrations in the grains, rachises, uppermost internodes, and flag leaves of rice plants decreased. The Cd concentration in grains decrensed from 0.63 mg·kg-1 to 0.47, 0.28, and 0.26 mg·kg-1 after spraying 10 mmol·L-1 MnCl2, 10 mmol·L-1 ZnCl2, and 5 mmol·L-1 malic acid, respectively, and the corresponding percentages of Cd decrease were 23.84%, 55.44%, and 58.86%. Spraying malic acid promoted the transfer of Mg and Fe from flag leaves to the uppermost internodes, and of K, Mn, and Zn from rachises to grains, but significantly inhibited the transfer of Cd from flag leaves to the uppermost internodes. Furthermore, the application of malic acid decreased the concentration of Cd in the uppermost internodes by 59.84%, and in rachises by 75.77%. Spraying Zn significantly increased the content of Ca and Fe in grains. Spraying Mn significantly promoted the transport of K from rachises to grains. These results indicate that spraying malic acid, Mn, and Zn can significantly decrease the Cd content in rice grains by promoting the influx of essential elements (i.e., K, Mn, and Zn)into them. |
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