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| Effects of combined application of silicon and phosphorus on cadmium uptake and transport in rice and its mechanisms |
| Received:July 17, 2019 |
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| KeyWord:rice;silicon;phosphorus;cadmium;relative expression of genes |
| Author Name | Affiliation | E-mail | | CAO Ting-yue | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | LIU Ming-da | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | WO Xi-hui | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | LI Jun | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | syau_lijun@163.com |
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| Abstract: |
| In order to explore the effects of silicon and phosphorus on the absorption and transport of cadmium in rice and its regulation mechanism. Shendao 529 was used as the research object in hydroponic experiments. In addition, four concentration gradients of silicon and phosphorus were applied under cadmium pollution stress, After 30 days of cultivation, rice samples were used to compare the biomass of rice, the cadmium content in shoots and below ground, the rhizosphere transfer coefficient, and the expression of cadmium transport related genes in rice.It was found that with the increase of silicon and phosphorus application in rice, lower cadmium content and rhizome transfer coefficients of the above-ground and underground parts of rice were achieved, specifically when combined with the silicon concentrations of 284 mg·kg-1 and phosphorus of 180 mg·kg-1.With the application of silicon and phosphorus, the rice OsLCT1 and LCD genes showed a downward trend in their relative expression. The OsNramp5 gene showed a trend of up-regulation in its relative expression, regulation range of the application was greater than that of the single element. It was therefore determined that the application of silicon and phosphorus can promote the growth of rice under cadmium stress and can affect the cadmium uptake and transfer in rice by regulating the expression of cadmium-related genes. |
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