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| Interactive Effects of Antimony and Silicon on Their Uptake and Accumulation by Rice Seedling in Solution Culture |
| Received:June 06, 2014 |
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| KeyWord:silicon;antimony;rice;interaction;toxicity;bio-accumulation factor |
| Author Name | Affiliation | E-mail | | XIANG Meng | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
Environmental and Resource Institute, Gansu Agricultural University, Lanzhou 730070, China | | | HUANG Yi-zong | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | hyz@rcees.ac.cn | | CAI Li-qun | Environmental and Resource Institute, Gansu Agricultural University, Lanzhou 730070, China | | | BAO Qiong-li | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | HUANG Yong-chun | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Xiao-ling | Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China | | | QIAO Min | Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | HU Ying | Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | JIN Shu-lan | Shangrao Normal University, Shangrao 334000, China | | | LI Ji | Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | WANG Fei | Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | |
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| Abstract: |
| Antimony(Sb) is a toxic element and silicon(Si) can alleviate metal toxicity. A solution culture experiment was carried out to investigate the effects of Si and Sb interaction on uptake and accumulation of Si and Sb by rice(Oryza sativa L.) seedling. Two forms of antimony[Sb(Ⅲ) and Sb(Ⅴ)] inhibited rice growth, with Sb(Ⅲ) being more toxic. Addition of silicon could alleviate Sb toxicity to rice seedlings. Concentrations of Si in rice roots and shoots were significantly affected by additions of Sb(Ⅲ) and Sb(Ⅴ). At 1.0 mmol·L-1 Si, adding 30 μmol·L-1 Sb(Ⅲ) and Sb(Ⅴ) significantly decreased Si concentrations in rice roots by 46.0% and 36.0% and in rice shoots by 52.2% and 23.5%, respectively, compared with the control. Likewise, Si addition significantly decreased concentrations of Sb in rice roots and shoots. Compared with the control, applying Si at 1.0~2.0 mmol·L-1 decreased Sb concentrations in rice roots and shoots respectively by 52.0%~88.4% and 24.6%~45.4% in 10 μmol·L-1 Sb(Ⅲ) solution, while by 53.8%~75.5% and 34.8%~49.6% in 10 μmol·L-1 Sb(Ⅴ) solution. In addition, Si significantly reduced bio-accumulation factor and distribution ratio of Sb in rice roots and shoots. These results suggest that Si application can inhibit Sb uptake and accumulation by plants, and thus reduce Sb risk to human health. |
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