caa a22 4500 606219072 CHVBK 20210128101116.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11104-015-2418-4 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2418-4 The concentration of selenium matters: a field study on mercury accumulation in rice by selenite treatment in qingzhen, Guizhou, China [Elektronische Daten] [Yu-Feng Li, Jiating Zhao, Yunyun Li, Hanjun Li, Junfang Zhang, Bai Li, Yuxi Gao, Chunying Chen, Manyi Luo, Rui Huang, Jun Li] Aims: The consumption of rice grain produced in mercury (Hg) contaminated soil was identified as a major route of dietary Hg exposure. The aims were 1) to determine the most suitable concentration of Se that can lead to least Hg accumulation in rice grain in real Hg contaminated paddy field in Qingzhen, and 2) to elucidate the possible mechanism of the protection against the phytotoxicity of Hg in rice by Se. Methods: Rice plants were treated with different concentrations (0, 0.01, 0.1, 0.5, 1 and 5μg/mL) of sodium selenite in a real paddy field in Qingzhen, Guizhou, China. The concentrations of Hg and Se in soil, stream water, rice tissues, and the seed setting rate (SSR) and thousand seed weight (TSW) were checked. The distribution and chemical forms of Hg and Se in rice root were studied by XRF and XAS. Results: Treating the rice plants with 0.5μg/mL of sodium selenite achieved the lowest Hg accumulation in rice grain while the highest SSR and TSW. In rice root, XRF found decreased Hg uptake, and XAS found Hg-Se complexes were formed. These findings, together with the formation of biological barriers like iron plaque, could explain the decreased accumulation of Hg in rice grain at Se levels below 0.5μg/mL. Se concentrations over 0.5μg/mL led to increased Hg accumulation and decreased SSR and TSW, which were ascribed to the significantly increased Se accumulation in rice grain. Conclusions: This field study suggest that treatment with appropriate level of Se (0.5μg/mL in this study) is an efficient way to reduce Hg accumulation in rice and increase rice yield and quality, thereafter to protect the health of the rice-dependent populations in Hg-contaminated area. Springer International Publishing Switzerland, 2015 Rice nationallicence Mercury nationallicence Selenium nationallicence XRF nationallicence XAS nationallicence Seed setting rate nationallicence Thousand seed weight nationallicence Li Yu-Feng State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut Zhao Jiating State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut Li Yunyun State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut Li Hanjun State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut Zhang Junfang Guizhou Institute of Environmental Science and Designing, 550081, Guiyang, China aut Li Bai State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut Gao Yuxi State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut Chen Chunying National Center for Nanoscience and Technology, 100190, Beijing, China aut Luo Manyi Beijing National Day School, 100039, Beijing, China aut Huang Rui Beijing National Day School, 100039, Beijing, China aut Li Jun Beijing National Day School, 100039, Beijing, China aut Plant and Soil Springer International Publishing 391/1-2(2015-06-01), 195-205 0032-079X 391:1-2<195 2015 391 11104 https://doi.org/10.1007/s11104-015-2418-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2418-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Yu-Feng State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut NATIONALLICENCE 700 1- Zhao Jiating State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut NATIONALLICENCE 700 1- Li Yunyun State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut NATIONALLICENCE 700 1- Li Hanjun State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut NATIONALLICENCE 700 1- Zhang Junfang Guizhou Institute of Environmental Science and Designing, 550081, Guiyang, China aut NATIONALLICENCE 700 1- Li Bai State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut NATIONALLICENCE 700 1- Gao Yuxi State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, and CAS Key Laboratory for Biomedical Effects of Nanomateriasl and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China aut NATIONALLICENCE 700 1- Chen Chunying National Center for Nanoscience and Technology, 100190, Beijing, China aut NATIONALLICENCE 700 1- Luo Manyi Beijing National Day School, 100039, Beijing, China aut NATIONALLICENCE 700 1- Huang Rui Beijing National Day School, 100039, Beijing, China aut NATIONALLICENCE 700 1- Li Jun Beijing National Day School, 100039, Beijing, China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 391/1-2(2015-06-01), 195-205 0032-079X 391:1-2<195 2015 391 11104