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Wu W, Qi D, Chen Y, Wang J, Zhang G, Wang Q, Niu H, Zhao Q, Peng T. Exogenous selenium mitigates cadmium uptake and accumulation in two rice (Oryza sativa L.) varieties in cadmium-contaminated soil. Sci Rep 2024; 14:21248. [PMID: 39261527 DOI: 10.1038/s41598-024-72113-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 09/03/2024] [Indexed: 09/13/2024] Open
Abstract
Rice grown in cadmium (Cd)-contaminated soil, is a potential threat to human health, but exogenous selenium (Se) application on rice can mitigate Cd toxicity. However, the mechanisms underlying Se mitigation of Cd stress in ratoon rice (RR) are still poorly understood. We conducted a pot experiment with moderate Cd-contaminated yellow-brown paddy soil on two rice varieties 'Taoyouxiangzhan' (TX) and 'Liangyou 6326'(LY). For all treatments, 1.0 mg kg-1 sodium selenite solution was added to soil. Treatment T1 was sodium selenite only, and in the other treatments 100 mg L-1 Se solution was sprayed on the leaves at seedling stage (T2), at tillering stage (T3), and in early anthesis stage (T4). Se treatments decreased Cd accumulation in rice grains and herbage. Under foliar spraying 100 mg L-1 Se at the seedling + 1.0 mg kg-1 Se in soil (T2), leaf Cd content decreased 16.95% in the current season and grains content decreased 46.67% in the subsequent season. Furthermore, grain Se content increased 0.94 mg kg-1 for the TX variety combined with the analysis of Cd bio-accumulation factor in grains, and Se treatments effectively decreased Cd grain concentrations due to reduced Cd translocation from roots to grains. TX variety rice showed a more pronounced response to Se treatments than LY.
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Affiliation(s)
- Wenjiang Wu
- Innovation Center of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
| | - Deqiang Qi
- Innovation Center of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
| | - Yalong Chen
- Innovation Center of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
| | - Jiaqi Wang
- Innovation Center of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
| | - Ganggang Zhang
- College of Horticulture, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
| | - Qinghua Wang
- Forestry and Fruit Research Institute of Beijing Academy of Agricultural Sciences, Beijing, 100089, People's Republic of China
| | - Hongbin Niu
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China
| | - Quanzhi Zhao
- Innovation Center of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China.
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China.
- College of Agronomy, Guizhou University, Guiyang, 550025, Guizhou, People's Republic of China.
| | - Ting Peng
- Innovation Center of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China.
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, Henan, People's Republic of China.
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Huang R, Bañuelos GS, Zhao J, Wang Z, Farooq MR, Yang Y, Song J, Zhang Z, Chen Y, Yin X, Shen L. Comprehensive evaluation of factors influencing selenium fertilization biofortification. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:6100-6107. [PMID: 38445779 DOI: 10.1002/jsfa.13442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 03/07/2024]
Abstract
BACKGROUND Dietary selenium (Se) deficiency, stemming from low Se concentrations in agricultural products, threatens human health. While Se-containing fertilizers can enhance the Se content in crops, the key factors governing Se biofortification with Se fertilization remain unclear. RESULTS This study constructed a global meta-analysis dataset based on field experiments comprising 364 entries on Se content in agricultural products and 271 entries on their yield. Random forest models and mixed effects meta-analyses revealed that plant types (i.e., cereals, vegetables, legumes, and forages) primarily influenced Se biofortification, with Se fertilization rates being the next significant factor. The random forest model, which included variables like plant types, Se fertilization rates, methods and types of Se application, initial soil conditions (including Se content, organic carbon content, and pH), soil types, mean annual precipitation, and temperature, explained 82.14% of the variation in Se content and 48.42% of the yield variation in agricultural products. For the same agricultural products, the increase in Se content decreased with higher rates of Se fertilization. The increase in Se content in their edible parts will be negligible for cereals, forages, legumes, and vegetable crops, when Se fertilization rates were 164, 103, 144, and 147 g Se ha-1, respectively. Conversely, while low Se fertilization rates enhanced yields, high rates led to a yield reduction, particularly in cereals. CONCLUSION Our findings highlight the need for balanced and precise Se fertilization strategies to optimize Se biofortification benefits and minimize the risk of yield reduction. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Ruilin Huang
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
- College of Resource and Environment, Anhui Science and Technology University, Chuzhou, China
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou, China
| | - Gary S Bañuelos
- USDA Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, Parlier, CA, USA
| | - Jianrong Zhao
- College of Resource and Environment, Anhui Science and Technology University, Chuzhou, China
| | - Zhangmin Wang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
| | - Muhammad Raza Farooq
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
| | - Yuling Yang
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou, China
- School of Food Engineering, Anhui Science and Technology University, Bengbu, China
| | - Jiaping Song
- College of Resource and Environment, Anhui Science and Technology University, Chuzhou, China
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou, China
| | - Zezhou Zhang
- College of Resource and Environment, Anhui Science and Technology University, Chuzhou, China
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou, China
| | - Youtao Chen
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou, China
| | - Xuebin Yin
- College of Resource and Environment, Anhui Science and Technology University, Chuzhou, China
- Yangtze River Delta Functional Agricultural (Food) Research Institute, Anhui Science and Technology University, Chuzhou, China
- Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou, China
| | - Lidong Shen
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
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Ali W, Mao K, Shafeeque M, Aslam MW, Li W. Effects of selenium on biogeochemical cycles of cadmium in rice from flooded paddy soil systems in the alluvial Indus Valley of Pakistan. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168896. [PMID: 38042182 DOI: 10.1016/j.scitotenv.2023.168896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/24/2023] [Accepted: 11/24/2023] [Indexed: 12/04/2023]
Abstract
This study delves into the pollution status, assesses the effects of Se on Cd biogeochemical pathways, and explores their interactions in nutrient-rich paddy soil-rice ecosystems through 500 soil-rice samples in Pakistan. The results showed that 99.6 % and 12.8 % of soil samples exceeded the World Health Organization (WHO) allowable Se and Cd levels (7 and 0.35 mg/kg). In comparison, 23 % and 6 % of the grain samples exceeded WHO's allowable Se and Cd levels (0.3 and 0.2 mg/kg), respectively. Geographically Weighted Regression (GWR) model results further revealed spatial nonstationarity, confirming diverse associations between dependent variables (Se and Cd in rice grain) and independent variables from paddy soil and plant tissues (root and shoot), such as Soil Organic Matter (SOM), pH, Se, and Cd concentrations. High Se:Cd molar ratios (>1) and a negative correlation (r = -0.16, p < 0.01) between the Cd translocation factor (Cd in rice grain/Cd in root) and Se in roots suggest that increased root Se levels inhibit the transfer of Cd from roots to grains. The inverse correlation between Se and Cd in paddy grains was further characterized as Se deficiency, no risk, high Cd risk, Se risk, Cd risk, and Se-Cd co-exposure risk. There was no apparent risk for human co-consumption in 42.6 % of grain samples with moderate Se and low Cd. The remaining categories indicate differing degrees of risk. In the study area, 31 % and 20 % of grain samples with low Se and Cd indicate Se deficiency and risk, respectively. High Se and low Cd levels in rice samples suggest a potential hazard for severe Se exposure due to frequent rice consumption. This study not only systematically evaluates the pollution status of paddy-soil systems in Pakistan but also provides a reference to thoroughly contemplate the development of a scientific approach for evaluating human risks and the potential dangers associated with paddy soils and rice, specifically in regions characterized by low Se and low Cd concentrations, as well as those with moderate Se and high Cd concentrations. SYNOPSIS: This study is significant for understanding the effects of Se on Cd geochemical cycles and their interactions in paddy soil systems in Pakistan.
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Affiliation(s)
- Waqar Ali
- Department of Ecological Sciences and Engineering, College of Environment and Ecology, Chongqing University, Chongqing 400045, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Kang Mao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | | | - Muhammad Wajahat Aslam
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Wei Li
- Department of Ecological Sciences and Engineering, College of Environment and Ecology, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science & Technology, Chongqing University, Chongqing 400045, China; Chongqing Field Observation Station for River and Lake Ecosystems, Chongqing University, Chongqing 400045, China.
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Wang Q, Huang S, Huang Q, Yu Y, Li H, Wan Y. Absorption and Biotransformation of Selenomethionine and Selenomethionine-Oxide by Wheat Seedlings ( Triticum aestivum L.). PLANTS (BASEL, SWITZERLAND) 2024; 13:380. [PMID: 38337913 PMCID: PMC10857051 DOI: 10.3390/plants13030380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Abstract
An in-depth understanding of Se uptake and metabolism in plants is necessary for developing Se biofortification strategies. Thus, hydroponic experiments were conducted to investigate the associated processes and mechanisms of organic Se (selenomethionine (SeMet) and selenomethionine-oxide (SeOMet)) uptake, translocation, transformation and their interaction in wheat, in comparison to inorganic Se. The results showed that Se uptake by the roots and the root-to-shoot translocation factor under the SeMet treatment were higher than those under the selenite, selenate and SeOMet treatments. The uptake and translocation of SeMet were higher than those of SeOMet within 72 h, although the differences gradually narrowed with time. The uptake of SeMet and SeOMet was also sensitive to the aquaporin inhibitor: AgNO3 addition resulted in 99.5% and 99.9% inhibitions of Se in the root in the SeMet and SeOMet treatments, respectively. Once absorbed by the root, they rapidly assimilated to other Se forms, and SeMet and Se-methyl-selenocysteine (MeSeCys) were the dominant species in SeMet- and SeOMet-treated plants, while notably, an unidentified Se form was also found in the root and xylem sap under the SeMet treatment. In addition, within 16 h, SeOMet inhibited the uptake and translocation of SeMet, while the inhibition was weakened with longer treatment time. Taken together, the present study provides new insights for the uptake and transformation processes of organic Se within plants.
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Affiliation(s)
- Qi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (Q.W.); (S.H.); (H.L.)
| | - Siyu Huang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (Q.W.); (S.H.); (H.L.)
| | - Qingqing Huang
- Innovation Team of Heavy Metal Ecotoxicity and Pollution Remediation, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, MARA, Tianjin 300191, China;
| | - Yao Yu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;
| | - Huafen Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (Q.W.); (S.H.); (H.L.)
| | - Yanan Wan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (Q.W.); (S.H.); (H.L.)
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Ullah H, Lun L, Rashid A, Zada N, Chen B, Shahab A, Li P, Ali MU, Lin S, Wong MH. A critical analysis of sources, pollution, and remediation of selenium, an emerging contaminant. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:1359-1389. [PMID: 35972610 PMCID: PMC9379879 DOI: 10.1007/s10653-022-01354-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 07/09/2022] [Indexed: 06/10/2023]
Abstract
Selenium (Se) is an essential metalloid and is categorized as emerging anthropogenic contaminant released to the environment. The rise of Se release into the environment has raised concern about its bioaccumulation, toxicity, and potential to cause serious damages to aquatic and terrestrial ecosystem. Therefore, it is extremely important to monitor Se level in environment on a regular basis. Understanding Se release, anthropogenic sources, and environmental behavior is critical for developing an effective Se containment strategy. The ongoing efforts of Se remediation have mostly emphasized monitoring and remediation as an independent topics of research. However, our paper has integrated both by explaining the attributes of monitoring on effective scale followed by a candid review of widespread technological options available with specific focus on Se removal from environmental media. Another novel approach demonstrated in the article is the presentation of an overwhelming evidence of limitations that various researchers are confronted with to overcome achieving effective remediation. Furthermore, we followed a holistic approach to discuss ways to remediate Se for cleaner environment especially related to introducing weak magnetic field for ZVI reactivity enhancement. We linked this phenomenal process to electrokinetics and presented convincing facts in support of Se remediation, which has led to emerge 'membrane technology', as another viable option for remediation. Hence, an interesting, innovative and future oriented review is presented, which will undoubtedly seek attention from global researchers.
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Affiliation(s)
- Habib Ullah
- Department of Environmental Science, Zhejiang University, Hangzhou, 310058 Zhejiang China
- Zhejiang Provincial Key Laboratory of Organic Pollutant Process and Control, Zhejiang University, Hangzhou, 310058 Zhejiang China
| | - Lu Lun
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655 China
| | - Audil Rashid
- Faculty of Sciences, Department of Botany, University of Gujrat, Gujrat, 50700 Pakistan
| | - Noor Zada
- Department of Chemistry, Government Post Graduate College, Lower Dir, Timergara, 18300 Pakistan
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou, 310058 Zhejiang China
- Zhejiang Provincial Key Laboratory of Organic Pollutant Process and Control, Zhejiang University, Hangzhou, 310058 Zhejiang China
| | - Asfandyar Shahab
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, China
| | - Ping Li
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang, 550081 China
- CAS Center for Excellence in Quaternary Science and Global Change in XI’an, Xi’an, 710061 China
| | - Muhammad Ubaid Ali
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang, 550081 China
- CAS Center for Excellence in Quaternary Science and Global Change in XI’an, Xi’an, 710061 China
| | - Siyi Lin
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, 999077 China
| | - Ming Hung Wong
- Consortium On Health, Environment, Education, and Research (CHEER), Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China
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Hu C, Nie Z, Shi H, Peng H, Li G, Liu H, Li C, Liu H. Selenium uptake, translocation, subcellular distribution and speciation in winter wheat in response to phosphorus application combined with three types of selenium fertilizer. BMC PLANT BIOLOGY 2023; 23:224. [PMID: 37101116 PMCID: PMC10134582 DOI: 10.1186/s12870-023-04227-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Selenium (Se) deficiency causes a series of health disorders in humans, and Se concentrations in the edible parts of crops can be improved by altering exogenous Se species. However, the uptake, transport, subcellular distribution and metabolism of selenite, selenate and SeMet (selenomethionine) under the influence of phosphorus (P) has not been well characterized. RESULTS The results showed that increasing the P application rate enhanced photosynthesis and then increased the dry matter weight of shoots with selenite and SeMet treatment, and an appropriate amount of P combined with selenite treatment increased the dry matter weight of roots by enhancing root growth. With selenite treatment, increasing the P application rate significantly decreased the concentration and accumulation of Se in roots and shoots. P1 decreased the Se migration coefficient, which could be attributed to the inhibited distribution of Se in the root cell wall, but increased distribution of Se in the root soluble fraction, as well as the promoted proportion of SeMet and MeSeCys (Se-methyl-selenocysteine) in roots. With selenate treatment, P0.1 and P1 significantly increased the Se concentration and distribution in shoots and the Se migration coefficient, which could be attributed to the enhanced proportion of Se (IV) in roots but decreased proportion of SeMet in roots. With SeMet treatment, increasing the P application rate significantly decreased the Se concentration in shoots and roots but increased the proportion of SeCys2 (selenocystine) in roots. CONCLUSION Compared with selenate or SeMet treatment, treatment with an appropriate amount of P combined with selenite could promote plant growth, reduce Se uptake, alter Se subcellular distribution and speciation, and affect Se bioavailability in wheat.
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Affiliation(s)
- Caixia Hu
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China
| | - Zhaojun Nie
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China.
| | - Huazhong Shi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409, USA
| | - Hongyu Peng
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China
| | - Guangxin Li
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China
| | - Haiyang Liu
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China
| | - Chang Li
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China
| | - Hongen Liu
- Resources and Environment College, Henan Agricultural University, Jinshui District, No. 63, Nongye RoadHenan Province, Zhengzhou, 450002, China.
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Su Y, Huang X, Li L, Muhammad ZA, Li M, Zheng T, Guo Z, Zhang Y, Luo D, Ye X, Jia X, Hussain Panhwar F, Tun MT, Zhu J. Comparative Responses of Silicon to Reduce Cadmium and Enrich Selenium in Rice Varieties. Foods 2023; 12:foods12081656. [PMID: 37107451 PMCID: PMC10138079 DOI: 10.3390/foods12081656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 04/06/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Cadmium (Cd), a highly toxic heavy metal for crops in China, poses a significant threat to rice cultivation. It is crucial to identify the genotypes with robust resistance to heavy metals, including Cd, in rice. The experiment was conducted to examine the mitigation effect of silicon (Si) on Cd toxicity levels in Se-enriched Z3055B and non-Se-enriched G46B rice genotypes. A basal dose of Si improved the growth and the quality of rice significantly by reducing the Cd content in rice roots, stems, leaves and grains and increased the yield, biomass and selenium (Se) content of brown rice in both genotypes. Additionally, Se content in brown rice and polished rice was notably higher in Se-enriched rice than in non-Se-enriched rice, with the highest amount at 0.129 mg/kg and 0.085 mg/kg, respectively. The results demonstrated that a basal fertilizer concentration of 30 mg/kg of Si was more effective in reducing Cd transport from roots to shoots in Se-enriched rice than in non-Se-enriched rice genotypes. Therefore, it can be concluded that Se-enriched rice genotypes are a viable option for food crop production in Cd-contaminated areas.
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Affiliation(s)
- Yang Su
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xin Huang
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Ling Li
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Zahir Ahsan Muhammad
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Meilin Li
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Tengda Zheng
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Zhe Guo
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Yue Zhang
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Dan Luo
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xiaoying Ye
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xiaomei Jia
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Faiz Hussain Panhwar
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Myo Thuzar Tun
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Jianqing Zhu
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, 211, Huimin Road, Wenjiang District, Chengdu 611130, China
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Paniz FP, Pedron T, Procópio VA, Lange CN, Freire BM, Batista BL. Selenium Biofortification Enhanced Grain Yield and Alleviated the Risk of Arsenic and Cadmium Toxicity in Rice for Human Consumption. TOXICS 2023; 11:362. [PMID: 37112588 PMCID: PMC10143363 DOI: 10.3390/toxics11040362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/13/2023] [Accepted: 03/14/2023] [Indexed: 06/19/2023]
Abstract
Arsenic (As) and Cadmium (Cd) are toxic to rice plants. However, selenium (Se) has the potential to regulate As and Cd toxicity. The present study aimed to evaluate the co-exposure to As5+ and Se6+ species in two rice cultivars, BRS Pampa and EPAGRI 108. The plants were divided into six groups and cultivated until complete maturation of the grains, under greenhouse conditions. Regarding total As and inorganic As (i-As) accumulation in grains, the highest concentrations were found for BRS Pampa. For Se, EPAGRI 108 presented the highest concentration of inorganic and organic Se (i-Se and o-Se). The exposure assessments showed that Se biofortification can mitigate the As accumulation in rice and, consequently, the risk of As and Cd toxicity in grains for human consumption. The combined effect of As and Se in rice plants could represent an alternative to biofortify this food in a safe way and with a higher percentage of bioavailable Se. Although Se is able to mitigate As toxicity in rice plants, in the present study we showed that co-exposure in different cultivars under the same growing conditions may present different responses to As and Se exposure.
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Zhang Z, Li B, Liu Y, He L, Pang T, Chen Z, Shohag MJI, Miao X, Li X, Gu M, Wei Y. Arbuscular Mycorrhizal Fungal Inoculation Increases Organic Selenium Accumulation in Soybean ( Glycine max (Linn.) Merr.) Growing in Selenite-Spiked Soils. TOXICS 2022; 10:565. [PMID: 36287845 PMCID: PMC9610514 DOI: 10.3390/toxics10100565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/21/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Selenium (Se) is an essential trace element for humans. Arbuscular mycorrhizal fungi (AMF) play a crucial role in increasing plant micronutrient acquisition. Soybean (Glycine max (Linn.) Merr.) is a staple food for most people around the world and a source of Se. Therefore, it is necessary to study the mechanism of Se intake in soybean under the influence of AMF. In this study, the effects of fertilization with selenite and inoculation with different AMF strains (Claroideoglomus etunicatum (Ce), Funneliformis mosseae (Fm)) on the accumulation and speciation of Se in common soybean plants were discussed. We carried out a pot experiment at the soil for 90 days to investigate the impact of fertilization with selenite and inoculation with Ce and Fm on the Se fractions in soil, soybean biomass, accumulation and speciation of Se in common soybean plants. The daily dietary intake of the Se (DDI) formula was used to estimate the risk threshold of human intake of Se from soybean seeds. The results showed that combined use of both AMF and Se fertilizer could boost total Se and organic Se amounts in soyabean seeds than that of single Se application and that it could increase the proportion of available Se in soil. Soybean inoculated with Fm and grown in soil fertilized with selenite had the highest organic Se. The results suggest that AMF inoculation could promote root growth, more soil water-soluble Se and higher Se uptake. The maximum Se intake of soybean for adults was 93.15 μg/d when treated with Se fertilizer and Fm, which satisfies the needs of Se intake recommended by the WHO. Combined use of AMF inoculation and Se fertilizer increases the bioavailable Se in soil and promotes the total Se concentration and organic Se accumulation in soybean. In conclusion, AMF inoculation combined with Se fertilization can be a promising strategy for Se biofortification in soybean.
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Affiliation(s)
- Zengyu Zhang
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, State Key Laboratory for Conservation and Utilization of Subtropical Agri-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Bei Li
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, State Key Laboratory for Conservation and Utilization of Subtropical Agri-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Yongxian Liu
- Guangxi Academy of Agricultural Sciences, Nanning 530004, China
| | - Lixin He
- Soil and Fertilizer Workstation of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Ting Pang
- Agricultural Service Center of Guangxi Liubei District, Liuzhou 545000, China
| | - Zongdao Chen
- Agricultural Service Center of Guangxi Liubei District, Liuzhou 545000, China
| | - Md. Jahidul Islam Shohag
- Department of Agriculture, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh
| | - Xiuyan Miao
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, State Key Laboratory for Conservation and Utilization of Subtropical Agri-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Xi Li
- College of Agriculture and Food Engineering, Baise Uninversity, Baise 533000, China
| | - Minghua Gu
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, State Key Laboratory for Conservation and Utilization of Subtropical Agri-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Yanyan Wei
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, State Key Laboratory for Conservation and Utilization of Subtropical Agri-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
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10
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Ma Q, Zhang Q, Li X, Gao Y, Wei C, Li H, Jiao H. The compound-independent calibration of five selenium species in rice using ion-pairing reversed phase chromatography coupled to inductively coupled plasma tandem mass spectrometry. J Chromatogr A 2022; 1674:463134. [DOI: 10.1016/j.chroma.2022.463134] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/30/2022] [Accepted: 05/07/2022] [Indexed: 11/26/2022]
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11
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Song F, Su D, Keyhani NO, Wang C, Shen L, Qiu J. Influence of selenium on the mycelia of the shaggy bracket fungus, Inonotus hispidus. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:3762-3770. [PMID: 34921405 DOI: 10.1002/jsfa.11724] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 04/07/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Selenium (Se) is a needed trace element for animals and humans. Many fungi have effective mechanisms to acquire, transform and accumulate Se in organic form. In this study, the effects of inorganic Se (sodium selenite) on the medicinal fungus Inonotus hispidus was investigated. RESULTS Inonotus hispidus was capable of tolerating up to 3.85 mmol L-1 selenite, at which ~85% growth inhibition was seen, with 50% growth inhibition occurring at ~1 mmol L-1 selenite. Growth in 0.29 mmol L-1 Se resulted in I. hispidus mycelium with 115 times higher Se levels compared to growth in standard media, and an organic Se content of 86% to total Se content. The influence of Se accumulation on morphological features of I. hispidus were examined by microscopic and scanning electron microscopic observation. These data revealed significant shrinkage and deformations of I. hispidus hyphae with decreased branching and collapse of clamp connections under higher Se stress. However, conidial production in I. hispidus increased dramatically. The influence of Se on mycelial growth could be recovered by reinoculation in standard media. Se accumulation had only minimal impacts on the yield of the potential selenocompounds such as amino acids, proteins and polysaccharides. By contrast, Se-enriched I. hispidus mycelium was of higher quality due to reduction in crude fat and total ash contents. CONCLUSIONS These data provide basic and applied information on the feasibility of producing selenized I. hispidus as an enriched and better quality product. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Feifei Song
- Department of Health and Food, Fujian Vocational College of Bioengineering, Fuzhou, China
| | - Dewei Su
- China National Engineering Research Center of JUNCAO Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Nemat O Keyhani
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida, USA
| | - Cui Wang
- Department of Health and Food, Fujian Vocational College of Bioengineering, Fuzhou, China
| | - Ligong Shen
- Department of Health and Food, Fujian Vocational College of Bioengineering, Fuzhou, China
| | - Junzhi Qiu
- College of Life Sciences, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China
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12
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Chang C, Zhang H, Huang F, Feng X. Understanding the translocation and bioaccumulation of cadmium in the Enshi seleniferous area, China: Possible impact by the interaction of Se and Cd. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 300:118927. [PMID: 35104557 DOI: 10.1016/j.envpol.2022.118927] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Selenium (Se) plays an indispensable role in minimizing cadmium (Cd) hazards for organisms. However, their potential interactions and co-exposure risk in the naturally Se-Cd enriched paddy field ecosystem are poorly understood. In this study, rice plants with rhizosphere soils sampled from the Enshi seleniferous region, China, were investigated to resolve this confusion. Here, translocation and bioaccumulation of Cd showed some abnormal patterns in the system of soil-rice plants. Roots had the highest bioaccumulation factors of Cd (range: 0.30-57.69; mean: 11.86 ± 14.32), and the biomass of Cd in grains (range: 1.44-127.70 μg, mean: 36.55 ± 36.20 μg) only accounted for ∼10% of the total Cd in whole plants (range: 14.67-1363.20 μg, mean: 381.25 ± 387.57 μg). The elevated soil Cd did not result in the increase of Cd concentrations in rice grains (r2 = 0.03, p > 0.05). Most interestingly, the opposite distribution between Se and Cd in rice grains was found (r2 = 0.24, p < 0.01), which is contrary to the positive correlation for Se and Cd in soil (r2 = 0.46, p < 0.01). It is speculated that higher Se (0.85-11.46 μg/g), higher Se/Cd molar ratios (mean: 5.42 ≫1; range: 1.50-12.87), and higher proportions of reductive Se species (IV, 0) of the Enshi acidic soil may have the stronger capacity of favoring the occurrence of Se binding to Cd ions by forming Cd-Se complexes (Se2- + Cd2+ =CdSe) under reduction conditions during flooding, and hence change the Cd translocation from soil to roots. Furthermore, the negative correlation (r2 = 0.25, p < 0.05) between the Cd translocation factor (TFwhole grains/root) and the roots Se indicates that Cd translocation from the roots to rice grains was suppressed, possibly by the interaction of Se and Cd. This study inevitably poses a challenge for the traditional risk assessment of Cd and Se in the soils-crops-consumers continuum, especially in the seleniferous area.
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Affiliation(s)
- Chuanyu Chang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China
| | - Hua Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China.
| | - Fang Huang
- CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China
| | - Xinbin Feng
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
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13
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Wang Q, Kong L, Huang Q, Li H, Wan Y. Uptake and translocation mechanisms of different forms of organic selenium in rice ( Oryza sativa L.). FRONTIERS IN PLANT SCIENCE 2022; 13:970480. [PMID: 36072317 PMCID: PMC9441932 DOI: 10.3389/fpls.2022.970480] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/02/2022] [Indexed: 05/12/2023]
Abstract
Selenium (Se) is an essential trace element for human and animal health, and toward an understanding of the uptake and translocation of Se in plants is important from the perspective of Se biofortification. In this study, we conducted hydroponic experiments to investigate the mechanisms of organic Se [selenomethionine (SeMet) and selenomethionine-oxide (SeOMet)] uptake, translocation, and the interactions between SeMet and SeOMet in rice. We also investigated differences in the dynamics of organic and inorganic Se uptake by rice roots. Concentration-dependent kinetic results revealed that SeMet uptake during a 1 h exposure was 3.19-16.0 times higher than that of three other Se chemical forms, with uptake capacity (Vmax ) values ordered as follows: SeMet>SeOMet>selenite>selenate. Furthermore, time-dependent kinetic analysis revealed that SeMet uptake by roots and content in shoots were initially clearly higher than those of SeOMet, although the differences gradually diminished with prolonged exposure time; while no significant difference was found in the transfer factor of Se from rice roots to shoots between SeMet and SeOMet. Root uptake of SeOMet was significantly inhibited by carbonyl cyanide 3-chlorophenylhydrazone (CCCP) (30.4%), AgNO3 (41.8%), and tetraethylammonium chloride (TEACl) (45.6%), indicating that SeOMet uptake is a metabolically active process, and that it could be mediated via aquaporins and K+ channels. Contrarily, SeMet uptake was insensitive to CCCP, although markedly inhibited by AgNO3 (93.1%), indicating that rice absorbs SeMet primarily via aquaporins. Furthermore, Se uptake and translocation in rice treated simultaneously with both SeMet and SeOMet were considerably lower than those in rice treated with SeMet treatment alone and notably lower than the theoretical quantity, indicating interactions between SeMet and SeOMet. Our findings provide important insights into the mechanisms underlying the uptake and translocation of organic Se within plants.
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Affiliation(s)
- Qi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, China
| | - Lingxuan Kong
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, China
| | - Qingqing Huang
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, China
| | - Huafen Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, China
| | - Yanan Wan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, China
- *Correspondence: Yanan Wan,
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14
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Xu Z, Liang B, Li Z, Jiang H, Liu T, Wang Q, Duan J. Combined use of lime, bentonite, and biochar for immobilization of Cd and mobilization of Se in paddy soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:45050-45063. [PMID: 33860422 DOI: 10.1007/s11356-021-13856-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
Remediation of soil contaminated with cadmium (Cd) that can produce rice enriched with selenium (Se) is highly significant for improving the public health in China. A key issue needing resolution in this regard is the simultaneous immobilization of Cd and mobilization of Se. To explore a potential promising method to remediate median-high Se soil that is contaminated by Cd, a potted experiment was conducted, and seven combined amendments (0.03-0.12% lime, 0.03-0.18% bentonite, and 0.3-1.2% biochar of the dry soil weight) were used to immobilize Cd in three paddy soils, in which the concentrations of Cd and Se are 0.46 and 0.45 mg/kg, 1.12 and 0.33 mg/kg, and 2.96 and 0.31 mg/kg, respectively. The soil pH increased by 1.5-2 units after the application of the amendments, and the soil organic carbon (SOC) concentration increased notably with the addition of large quantities of biochar. As the pH and SOC concentration increased, the concentrations of the available Cd in the soil decreased by 35-50%, and the FTIR spectrum showed that O-containing groups and Si-O facilitated the Cd immobilization. The concentration of Cd in brown rice decreased with a decrease in the available Cd. There was no apparent correlation between the Se concentration in the brown rice and the concentration of the available Se in the soil, although the available Se increased by 40-80% after the application of amendments. The accumulation of Se in rice grains was regulated by interactions among the lime, bentonite, biochar, and the soil. An SEM-EDS analysis showed that the biochar particles were covered with bentonite and other soil minerals that could postpone biochar aging and contribute to the longevity of the combined amendments in the soil.
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Affiliation(s)
- Zhiqiang Xu
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Bin Liang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Zhonghui Li
- Sichuan Geological Survey, Chengdu, 610081, China
| | - Hui Jiang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Ting Liu
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Qiubo Wang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jiaxin Duan
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
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15
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Etteieb S, Magdouli S, Komtchou SP, Zolfaghari M, Tanabene R, Brar KK, Calugaru LL, Brar SK. Selenium speciation and bioavailability from mine discharge to the environment: a field study in Northern Quebec, Canada. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:50799-50812. [PMID: 33970419 DOI: 10.1007/s11356-021-14335-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
The speciation, behaviour, and bioavailability of released selenium (Se) from mine effluent discharge to sediments and plants were assessed. Discharged mine effluent containing 65±0.9 μg/L of total Se subsequently contaminated the exposed sediment with an average total Se concentration of 321 mg/kg as well as exposed Typha latifolia plants where 534 and 92 mg/kg were found in roots and leaves, respectively. The strategy of T. latifolia in Se phytoremediation consisted of a phytostabilization and accumulation of Se predominantly in roots. Se plant root uptake was promoted by synergistic effects of Cu, Pb, Zn, and Cd while Co, Fe, Mn, Ni, Na, K, and Mg had antagonistic effects. Se plant uptake was also governed by sediment characteristics mainly pH, total Se, and iron concentration. Se speciation results demonstrated that the most accumulated Se species by T. latifolia roots were selenite and selenomethionine with average concentrations of 2.68 and 2.04 mg/kg respectively while other Se species were the most translocated (average translocation factor of 1.89). Se speciation in roots was positively correlated with sediment pH, organic matter, electrical conductivity, and iron concentration. This study confirms deploying corrective measures for mine effluent treatment before discharge in a sediment-plant environment to protect living organisms from toxic effects. T. latifolia is recommended as a Se-hyperaccumulator to be used for mine soil phytoremediation in cold regions in Canada.
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Affiliation(s)
- Selma Etteieb
- Centre technologique des résidus industriels en Abitibi Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, J9X 0E1, Canada
- Centre Eau, Terre et Environnement, Institut national de la recherche scientifique, Université du Québec, 490 rue de la Couronne, Québec, G1K 9A9, Canada
| | - Sara Magdouli
- Centre technologique des résidus industriels en Abitibi Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, J9X 0E1, Canada.
- Centre Eau, Terre et Environnement, Institut national de la recherche scientifique, Université du Québec, 490 rue de la Couronne, Québec, G1K 9A9, Canada.
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, M3J 1P3, Canada.
| | - Simon Pierre Komtchou
- Centre technologique des résidus industriels en Abitibi Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, J9X 0E1, Canada
| | - Mehdi Zolfaghari
- Centre technologique des résidus industriels en Abitibi Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, J9X 0E1, Canada
| | - Rayen Tanabene
- Centre technologique des résidus industriels en Abitibi Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, J9X 0E1, Canada
| | - Kamalpreet Kaur Brar
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, M3J 1P3, Canada
| | - Luliana Laura Calugaru
- Centre technologique des résidus industriels en Abitibi Témiscamingue, 433 boulevard du collège, Rouyn-Noranda, J9X 0E1, Canada
| | - Satinder Kaur Brar
- Centre Eau, Terre et Environnement, Institut national de la recherche scientifique, Université du Québec, 490 rue de la Couronne, Québec, G1K 9A9, Canada
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, M3J 1P3, Canada
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16
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Selenium speciation and bioaccessibility in Se-fertilised crops of dietary importance in Malawi. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103841] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Huang W, Zhu Y, Wang D, Wu N. Assessment on the Coupling Effects of Drip Irrigation and Se-Enriched Organic Fertilization in Tomato Based on Improved Entropy Weight Coefficient Model. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 106:884-891. [PMID: 33683387 DOI: 10.1007/s00128-021-03156-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 02/12/2021] [Indexed: 06/12/2023]
Abstract
Selenium (Se) is an essential micronutrient for human beings and plants are the current main sources of Se element in Asian diet. Therefore a feasible way to increase people's Se intake is to increase Se content in plants. In this paper, we focus on how the tomato (Solanum Lycopersicum) yield and quality are influenced by the effect of irrigation amount, Se-enriched and high-calcium organic fertilizer and compound fertilizer amount respectively. The results from a two-year experiment show that the combination of Se-enriched organic fertilizer and compound fertilizer can significantly increase the tomato yield comparing with the use of NPK organic or compound fertilizer. It is also shown that by applying more Se-enriched and high-calcium organic fertilizer the contents of Se, Lycopene, Vitamin C (Vc) and soluble sugar in tomato fruit can be increased considerably. It was found that the highest Se content was achieved using 100% Se-enriched organic fertilizer combined with irrigation at 100% in 2016 and 100% Se-enriched organic fertilizer with irrigation at 80% in 2017. Deficit irrigation (80%) can help to increase Water Use Efficiency (WUE) and the Se and VC contents in tomato yield. Therefore in order to improve the Se-enriched tomato yield and quality, it is suggested to apply 100% Se-enriched organic fertilizer and adopt the deficit irrigation at 80%.
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Affiliation(s)
- Wei Huang
- College of Agriculture, Yulin Normal University, Yulin, 537000, Guangxi, China
| | - Yulin Zhu
- College of Agriculture, Yulin Normal University, Yulin, 537000, Guangxi, China
| | - Daobo Wang
- College of Agriculture, Yulin Normal University, Yulin, 537000, Guangxi, China.
| | - Ning Wu
- College of Electronic and Information Engineering, Beibu Gulf University, Qinzhou, 535099, Guangxi, China.
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18
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Xie M, Sun X, Li P, Shen X, Fang Y. Selenium in cereals: Insight into species of the element from total amount. Compr Rev Food Sci Food Saf 2021; 20:2914-2940. [PMID: 33836112 DOI: 10.1111/1541-4337.12748] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/24/2021] [Accepted: 03/09/2021] [Indexed: 02/07/2023]
Abstract
Selenium (Se) is a trace mineral micronutrient essential for human health. The diet is the main source of Se intake. Se-deficiency is associated with many diseases, and up to 1 billion people suffer from Se-deficiency worldwide. Cereals are considered a good choice for Se intake due to their daily consumption as staple foods. Much attention has been paid to the contents of Se in cereals and other foods. Se-enriched cereals are produced by biofortification. Notably, the gap between the nutritional and toxic levels of Se is fairly narrow. The chemical structures of Se compounds, rather than their total contents, contribute to the bioavailability, bioactivity, and toxicity of Se. Organic Se species show better bioavailability, higher nutritional value, and less toxicity than inorganic species. In this paper, we reviewed the total content of Se in cereals, Se speciation methods, and the biological effects of Se species on human health. Selenomethionine (SeMet) is generally the most prevalent and important Se species in cereal grains. In conclusion, Se species should be considered in addition to the total Se content when evaluating the nutritional and toxic values of foods such as cereals.
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Affiliation(s)
- Minhao Xie
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Xinyang Sun
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China.,Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Peng Li
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Xinchun Shen
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Yong Fang
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
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19
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Feng R, Wang L, Yang J, Zhao P, Zhu Y, Li Y, Yu Y, Liu H, Rensing C, Wu Z, Ni R, Zheng S. Underlying mechanisms responsible for restriction of uptake and translocation of heavy metals (metalloids) by selenium via root application in plants. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123570. [PMID: 32745877 DOI: 10.1016/j.jhazmat.2020.123570] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/11/2020] [Accepted: 07/23/2020] [Indexed: 05/07/2023]
Abstract
Since selenium (Se) was shown to be an essential element for humans in 1957, the biofortification of Se to crops via foliar spraying or soil fertilization has been performed for several decades to satisfy the daily nutritional need of humans. Appropriate doses of Se were found to counteract a number of abiotic and biotic stresses, such as exposure to heavy metals (metalloids) (HMs), via influencing the regulation of antioxidant systems, by stimulation of photosynthesis, by repair of damaged cell structures and functions, by regulating the metabolism of some substances and the rebalancing of essential elements in plant tissues. However, few concerns were paid on why and how Se could reduce the uptake of a variety of HMs. This review will mainly address the migration and transformation of HMs regulated by Se in the soil-plant system in order to present a hypothesis of why and how Se can reduce the uptake of HMs in plants. The following aspects will be examined in greater detail, including 1) how the soil characteristics influences the ability of Se to reduce the bioavailability of HMs in soils and their subsequent uptake by plants, which include soil Se speciation, pH, water regime, competing ions and microbes; 2) how the plant root system influenced by Se affects the uptake or the sequestration of HMs, such as root morphology, root iron plaques and root cell wall; 3) how Se combines with HMs and then sequesters them in plant cells; 4) how Se competes with arsenic (As) and thereby reduces As uptake in plants; 5) how Se regulates the expression of genes encoding functions involved in uptake, translocation and sequestration of HMs by Se in plants.
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Affiliation(s)
- RenWei Feng
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China.
| | - LiZhen Wang
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - JiGang Yang
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - PingPing Zhao
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - YanMing Zhu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - YuanPing Li
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - YanShuang Yu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - Hong Liu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, 350002, China
| | - ZeYing Wu
- Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China
| | - RunXiang Ni
- Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China
| | - ShunAn Zheng
- Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China.
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20
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Xiao Z, Wang J, Guo J, Suo D, Wang S, Tian J, Guo L, Fan X. Quantitative selenium speciation in feed by enzymatic probe sonication and ion chromatography-inductively coupled plasma mass spectrometry. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:268-279. [PMID: 33405994 DOI: 10.1080/19440049.2020.1849820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A rapid, sensitive and species preservative analytical method for the simultaneous determination of six selenium (Se) species has been developed. Enzymatic probe sonication (EPS) was investigated as a novel and alternative technology for the extraction of Se species from feed matrices and the results were compared with the conventional hot water extraction, enzymatic hydrolysis and sequential extraction. The critical parameters of EPS such as enzyme types, extraction time, temperature, ultrasonic power and sample/enzyme ratio were varied with control. The Se species were separated and quantitatively determined by ion chromatography-inductively coupled plasma mass spectrometry (IC-ICP-MS). Under current optimised conditions, six inorganic and organic Se species were completely separated within 15 min in a single chromatographic run. The spectral interferences from the argon plasma 40Ar2, 40Ar37Cl or 1H79Br were effectively removed by employing the kinetic energy discrimination (KED) mode. Quantitative extraction for total Se (>94.8%) and more than 89.0% for the sum of different Se chemical forms without species transformation were obtained in only 60 s by applying the EPS treatment using aqueous protease XIV. The limits of detection (LODs) and quantification (LOQs) for Se species were in the ranges of 0.21-0.56 µg kg-1 and 0.69-1.87 µg kg-1, respectively. The proposed method was successfully applied to the speciation of Se in several reference materials and feed samples collected from the markets and local farms.
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Affiliation(s)
- Zhiming Xiao
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences , Beijing, China
| | - Jitong Wang
- Beijing Institute of Feed Control , Beijing, China
| | - Jiangpeng Guo
- Beijing General Station of Animal Husbandry , Beijing, China
| | - Decheng Suo
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences , Beijing, China
| | - Shi Wang
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences , Beijing, China
| | - Jing Tian
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences , Beijing, China
| | - Lili Guo
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences , Beijing, China
| | - Xia Fan
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences , Beijing, China
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21
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Chen X, Zhang Z, Gu M, Li H, Shohag MJI, Shen F, Wang X, Wei Y. Combined use of arbuscular mycorrhizal fungus and selenium fertilizer shapes microbial community structure and enhances organic selenium accumulation in rice grain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141166. [PMID: 32798860 DOI: 10.1016/j.scitotenv.2020.141166] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Selenium (Se) deficiency is a public health concern that is mainly caused by inadequate intake of Se from staple crops. The purpose of this study is to investigate the effects of inoculation with different arbuscular mycorrhizal fungus (AMF) strains, including Funneliformis mosseae (Fm) and Glomus versiforme (Gv), and fertilization with selenite or selenate on the accumulation and speciation of Se in rice. The results showed that using both AMF inoculation and Se fertilization could promote organic Se accumulation in rice grain than using only Se fertilization. Moreover, grain of rice inoculated with Fm and grown in soil fertilized with selenate had the highest accumulation of Se, of which selenomethionine was the dominant Se species. The AMF inoculation also led to high content of available Se and high relative abundance of Firmicutes in soil. The high concentration of available Se in soil suggests that the AMF inoculation may modify the microbial community, which then causes the Se uptake of rice to increase, in turn causing the amount of organic Se accumulated in rice to increase. Based on these results, using AMF inoculation combined with Se fertilization can be a promising strategy for Se biofortification in rice.
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Affiliation(s)
- Xue Chen
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Zengyu Zhang
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Minghua Gu
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Hong Li
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - M J I Shohag
- Department of Agriculture, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh
| | - Fangke Shen
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Xueli Wang
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Yanyan Wei
- Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, China.
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22
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Sarwar N, Akhtar M, Kamran MA, Imran M, Riaz MA, Kamran K, Hussain S. Selenium biofortification in food crops: Key mechanisms and future perspectives. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103615] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Mao X, Hua C, Yang L, Zhang Y, Sun Z, Li L, Li T. The Effects of Selenium on Wheat Fusarium Head Blight and DON Accumulation Were Selenium Compound-Dependent. Toxins (Basel) 2020; 12:toxins12090573. [PMID: 32899906 PMCID: PMC7551897 DOI: 10.3390/toxins12090573] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 12/03/2022] Open
Abstract
Fusarium head blight (FHB) caused by Fusarium graminearum not only results in severe yield losses, but also contaminates wheat grains with deoxynivalenol (DON) toxins. Prevention and control of FHB and DON contamination rely mainly on resistant varieties and fungicides. Selenium (Se) is an essential element for humans and animals, and also a beneficial element for plants. In this work, four Se compounds, i.e., sodium selenite (Na2SeO3), sodium selenate (Na2SeO4), selenomethionine (SeMet) and selenocysteine (SeCys2), were supplemented in a trichothecene biosynthesis induction (TBI) solid medium at different dosages in in vitro experiments. The four Se compounds at the dosage of 20 mg∙L−1 were sprayed onto wheat spikes immediately after inoculation at anthesis. All four of the Se compounds significantly inhibited the mycelial growth and DON production in the in vitro experiment; however, in planta, their effects on FHB severity and toxin accumulation in grains were compound-dependent. SeMet consistently negatively regulated fungal growth and DON accumulation both in vitro and in planta, which could be a novel and proconsumer strategy for reducing the detriment of wheat FHB disease and DON accumulation.
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Affiliation(s)
| | | | | | | | | | | | - Tao Li
- Correspondence: ; Tel.: +86-514-8797-7806
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24
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Wang K, Wang Y, Li K, Wan Y, Wang Q, Zhuang Z, Guo Y, Li H. Uptake, translocation and biotransformation of selenium nanoparticles in rice seedlings (Oryza sativa L.). J Nanobiotechnology 2020; 18:103. [PMID: 32703232 PMCID: PMC7376921 DOI: 10.1186/s12951-020-00659-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 07/13/2020] [Indexed: 02/08/2023] Open
Abstract
Background Selenium (Se) in soil mainly consists of selenite, selenate, and elemental Se. However, little is known about the mechanism involved in the uptake and biotransformation of elemental Se by plants. Results In this study, the uptake, translocation, subcellular distribution and biotransformation of selenium nanoparticles (SeNPs) in rice (Oryza sativa L.), and a comparison with selenite and selenate, were investigated through hydroponic experiments. The study revealed that SeNPs could be absorbed by rice plants; and aquaporin inhibitor was responsible for a 60.4% inhibition of SeNP influx, while metabolic inhibitor was ineffective. However, the SeNPs uptake rate of rice roots was approximately 1.7 times slower than that of selenite or selenate. Under the SeNPs or selenite treatment, Se was primarily accumulated in roots rather than in shoots, whereas an opposite trend was observed with selenate treatment. Additionally, most of the absorbed Se was distributed in cell wall of the SeNPs or selenite treated-rice plants, while its proportion was the highest in soluble cytosol of the selenate treated-rice plants. The absorbed SeNPs or selenite was rapidly assimilated to organic forms, with SeMet being the most predominant species in both shoots and roots of the rice plants. However, following selenate treatment, Se(VI) remained as the most predominant species, and only a small amount of it was converted to organic forms. Conclusion Therefore, this study provides a deeper understanding of the mechanisms associated SeNPs uptake and biotransformation within plants.
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Affiliation(s)
- Kang Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China
| | - Yaqi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China
| | - Kui Li
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China
| | - Yanan Wan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China.
| | - Qi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China
| | - Zhong Zhuang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China
| | - Yanbin Guo
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China
| | - Huafen Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, The People's Republic of China.
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25
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Lee SH, Kwon SW, Lee Y, Nam SH. Fast and simple selenium speciation by solid phase extraction and laser-induced breakdown spectroscopy. J Anal Sci Technol 2020. [DOI: 10.1186/s40543-020-00227-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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26
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Lv H, Chen W, Zhu Y, Yang J, Mazhar SH, Zhao P, Wang L, Li Y, Azam SM, Ben Fekih I, Liu H, Rensing C, Feng R. Efficiency and risks of selenite combined with different water conditions in reducing uptake of arsenic and cadmium in paddy rice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114283. [PMID: 32443220 DOI: 10.1016/j.envpol.2020.114283] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/19/2020] [Accepted: 02/26/2020] [Indexed: 05/09/2023]
Abstract
The co-contamination of arsenic (As) and cadmium (Cd) in soils is a common problem. Selenium (Se) can reduce the uptake of As and Cd in plants, and in practice, the alternate wetting and drying is a common culture mode in rice production. However, it is unknown whether Se can efficiently reduce As and Cd concentrations in crops suffering from a high-level contamination of As and Cd under different soil water conditions. In this study, we assessed the efficiency and risks of selenite [Se(IV)], in a pot experiment, to reduce the uptake of As and Cd in a rice plant (YangDao No 6) growing in a heavily contaminated soil by As and Cd (pH 7.28) under different soil water conditions. The results showed that Se(IV) failed to control the grain total As and Cd concentrations within their individual limited standard (0.2 mg kg-1) despite that Se(IV) significantly reduced the grain total As and Cd concentrations. The soil drying treatment alone could reduce the accumulation of arsenite [As(III)] in the grains, but additional Se(IV) stimulated the accumulation of As(III) in the grains under soil drying conditions. In addition, the addition of Se(IV) enhanced the As and Cd concentrations in the shoots and/or roots of rice plants under certain conditions. The above results all suggested that the utilization of Se(IV) in a high contaminated soil by As and Cd cannot well control the total concentrations of As and Cd in plants. In this study, the available concentrations of As and Cd in the rhizosphere soil, the rhizosphere soil pH, the formation of root iron/manganese plaques and the concentrations of essential elements in the grains were monitored, and the related mechanisms on the changes of these parameters were also discussed. This study will give a guideline for the safe production of rice plants in a heavily co-contaminated soil by As and Cd.
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Affiliation(s)
- HaiQin Lv
- Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, China; College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - WenXiang Chen
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - YanMing Zhu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - JiGang Yang
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Sohaib H Mazhar
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - PingPing Zhao
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - LiZhen Wang
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - YuanPing Li
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Syed Muhammad Azam
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Ibtissem Ben Fekih
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Hong Liu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - RenWei Feng
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China.
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27
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Wang Y, Wang K, Wang Q, Wan Y, Zhuang Z, Yu Y, Li H. Selenite Uptake and Transformation in Rice Seedlings ( Oryza sativa L.): Response to Phosphorus Nutrient Status. FRONTIERS IN PLANT SCIENCE 2020; 11:874. [PMID: 32655602 PMCID: PMC7324753 DOI: 10.3389/fpls.2020.00874] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 05/28/2020] [Indexed: 05/26/2023]
Abstract
Selenite and phosphate share similar uptake mechanisms, as a phosphate transporter is involved in the selenite uptake process. However, the mechanism by which selenium (Se) transformation in plants is mediated by phosphorus (P) remains unclear. In this hydroponic study, the absorption, translocation, and biotransformation of Se in selenite-treated rice (Oryza sativa L.) seedlings were investigated under varying P nutrient status. The results showed that P-deficient cultivation increased the Se concentration in roots with Se-only treatment by 2.1 times relative to that of the P-normal condition. However, co-treating roots with additional P caused the Se concentration to decline by 20 and 73% compared to Se treatment alone under P-normal and P-deficient cultivation, respectively. A similar pattern was also observed in Se uptake by rice roots. With an Se-transfer factor elevated by 4.4 times, the shoot Se concentration was increased by 44% with additional P supply compared to the concentration under Se-only treatment of P deficiency; however, no significant differences were observed regarding P-normal cultivation. P deficiency increased the Se percentage by 28% within the cell wall, but reduced it by 60% in the soluble fraction of Se-only treated roots relative to that of the P-normal condition. Contrarily, compared with the Se-only treatment under P deficiency, additional P supply enhanced Se storage in the root soluble fraction by 1.3 times. The opposite tendency was observed for rice shoots. Moreover, P deficiency reduced the proportion of SeMet by 22%, but increased MeSeCys by 1.3 times in Se-only treated roots compared to those under the P-normal condition. Interestingly, MeSeCys was not detected when additional P was added to the two cultivation conditions. Unlike in the roots, only SeMet was generally detected in the rice shoots. The results demonstrate that the P nutrient status strongly affects the Se biofortification efficiency in rice seedlings by altering the Se subcellular distribution and speciation.
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28
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Tuning of the Amount of Se in Rice ( Oryza sativa) Grain by Varying the Nature of the Irrigation Method: Development of an ICP-MS Analytical Protocol, Validation and Application to 26 Different Rice Genotypes. Molecules 2020; 25:molecules25081861. [PMID: 32316646 PMCID: PMC7221937 DOI: 10.3390/molecules25081861] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/08/2020] [Accepted: 04/15/2020] [Indexed: 12/29/2022] Open
Abstract
The amount of specific trace elements like selenium (Se) may be of health concern for humans if contained in too high (or low) quantities in staple foods like rice. Among the attempts aimed to optimize the Se concentration in rice, only few studies have been focused on the use of irrigation methods other than continuous flooding. Since intermittent irriguous methods, like sprinkler and saturation, have found to be effective in modifying the bioaccumulation of arsenic and cadmium in rice kernels, the main goal of this study is to measure the amount of the total Se contained in grains of 26 rice genotypes cultivated for two consecutive agrarian vintages in the same open field and with the same water, but differently irrigated with continuous flooding, sprinkler or saturation. To do this, an original and validated ICP-MS method has been developed. The validation parameters accounted for a high sensitivity and accuracy. Sprinkler irrigation is able to reduce in the average of 90% the amount of total Se in kernels in comparison to values measured in rice irrigated with continuous flooding. In conclusion, different irrigation techniques and rice genotypes seem to be valuable tools in order to allow in the future the customized modulation of the Se concentration in rice grain according to the needs of the various populations.
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29
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Shaheen SM, El-Naggar A, Antoniadis V, Moghanm FS, Zhang Z, Tsang DCW, Ok YS, Rinklebe J. Release of toxic elements in fishpond sediments under dynamic redox conditions: Assessing the potential environmental risk for a safe management of fisheries systems and degraded waterlogged sediments. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 255:109778. [PMID: 32063315 DOI: 10.1016/j.jenvman.2019.109778] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/23/2019] [Accepted: 10/25/2019] [Indexed: 05/26/2023]
Abstract
Waterlogged soils and sediments contaminated with potentially toxic elements (PTEs) constitute a complicated case of degraded areas; their management requires understanding of the dynamic redox-driven PTE mobilization. Such studies about PTE redox-induced dynamics in fishpond sediments are still scarce, but of great importance concerning environmental and human health risk. We studied the redox potential (EH)-induced impacts on the solubility of As, Co, Cu, Mo, Ni, Se, V, and Zn in the sediments of a fish farm in the Nile Delta, Egypt, using an automated apparatus of biogeochemical microcosm. We assessed the fate of elements as affected by the EH-induced changes in pH, Fe, Mn, SO42-, Cl-, and the dissolved aliphatic (DOC) and aromatic (DAC) organic carbon. Sediment redox ranged from -480 mV to +264 mV. Flooding the sediments caused a significant decrease in pH from 8.2 to 5.7. Dissolved concentrations of As, Co, Ni, Se, and Zn, as well as DOC, Fe, and Mn increased under the reducing acidic conditions. The release of As, Co, Ni, Se, and Zn could be attributed to the decrease of EH and the subsequent decrease of pH, as well as to the increase of DOC, and/or the dissolution of Fe-Mn oxides caused by redox reactions. Dissolved concentrations of Cu, Mo, and V increased under oxic conditions and were significantly positive correlated with EH, pH, DAC, and SO42-. This enhancement might be caused by the EH-dependent increase of pH under oxic conditions (particularly for Mo and V), which also led to DAC increase. Sulfide oxidation and the release of the associated elements may have also had a contribution, particularly in the release of Cu. Therefore, the release dynamics of dissolved Cu, Mo, and V in the sediments were controlled, to a certain extent, by the changes of EH/pH, DAC, and sulfur chemistry. We conclude that the biogeochemical differences in the behaviour of the studied elements under variable redox regimes substantially affected the fishponds via possible enhancement of PTE mobilization. Our work shows that the potential environmental risks related to PTE mobilization and fish food security should be taken into consideration for the management of degraded aquaculture systems and waterlogged soils and sediments.
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Affiliation(s)
- Sabry M Shaheen
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, 21589, Jeddah, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516, Kafr El-Sheikh, Egypt.
| | - Ali El-Naggar
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China; Department of Soil Sciences, Faculty of Agriculture, Ain Shams University, Cairo, 11241, Egypt.
| | - Vasileios Antoniadis
- Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Greece.
| | - Farahat S Moghanm
- University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516, Kafr El-Sheikh, Egypt.
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shannxi, 712100, China.
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Yong Sik Ok
- Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, South Korea.
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; Department of Environment, Energy and Geoinformatics, Sejong University, Seoul, 05006, South Korea.
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30
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Yu Y, Liu Z, Luo LY, Fu PN, Wang Q, Li HF. Selenium Uptake and Biotransformation in Brassica rapa Supplied with Selenite and Selenate: A Hydroponic Work with HPLC Speciation and RNA-Sequencing. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:12408-12418. [PMID: 31644287 DOI: 10.1021/acs.jafc.9b05359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Vegetables are an ideal source of human Se intake; it is important to understand selenium (Se) speciation in plants due to the distinct biological functions of selenocompounds. In this hydroponic study, the accumulation and assimilation of selenite and selenate in pak choi (Brassica rapa), a vastly consumed vegetable, were investigated at 1-168 h with HPLC speciation and RNA-sequencing. The results showed that the Se content in shoots and Se translocation factors with selenate addition were at least 10.81 and 11.62 times, respectively, higher than those with selenite addition. Selenite and selenate up-regulated the expression of SULT1;1 and PHT1;2 in roots by over 240% and 400%, respectively. Selenite addition always led to higher proportions of seleno-amino acids, while SeO42- was dominant under selenate addition (>49% of all Se species in shoots). However, in roots, SeO42- proportions declined substantially by 51% with a significant increase of selenomethionine proportions (63%) from 1 to 168 h. Moreover, with enhanced transcript of methionine gamma-lyase (60% of up-regulation compared to the control) plus high levels of methylselenium in shoots (approximately 70% of all Se species), almost 40% of Se was lost during the exposure under the selenite treatment. This work provides evidence that pak choi can rapidly transform selenite to methylselenium, and it is promising to use the plant for Se biofortification.
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Affiliation(s)
- Yao Yu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences , China Agricultural University , Beijing 100193 , The People's Republic of China
| | - Zhe Liu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences , China Agricultural University , Beijing 100193 , The People's Republic of China
| | - Li-Yun Luo
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences , China Agricultural University , Beijing 100193 , The People's Republic of China
| | - Ping-Nan Fu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences , China Agricultural University , Beijing 100193 , The People's Republic of China
| | - Qi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences , China Agricultural University , Beijing 100193 , The People's Republic of China
| | - Hua-Fen Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences , China Agricultural University , Beijing 100193 , The People's Republic of China
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Wang M, Cui Z, Xue M, Peng Q, Zhou F, Wang D, Dinh QT, Liu Y, Liang D. Assessing the uptake of selenium from naturally enriched soils by maize (Zea mays L.) using diffusive gradients in thin-films technique (DGT) and traditional extractions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 689:1-9. [PMID: 31260894 DOI: 10.1016/j.scitotenv.2019.06.346] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 06/21/2019] [Accepted: 06/22/2019] [Indexed: 05/21/2023]
Abstract
A generally accepted method to predict selenium (Se) bioavailability of long-term contaminated soils has not yet been established, even if risk assessments in selenosis areas are crucial. In this study, a set of methods were tested to assess the bioavailability of Se to field maize. Fifty maize (Zea mays L.) samples and corresponding soils were collected from a selenosis area (Ziyang, China). The diffusive gradients in thin-films (DGT) technique and the traditional chemical extraction methods, including seven single-step extraction procedures and a five-step sequential extraction were used to predict the bioaccumulation of Se in plant. The result verified the presence of 50% of total Se in the form of residual Se fraction, followed by organic-bound and Fe-Mn oxide-bound Se fractions in soil. In addition, Se6+, Se4+, and Se2- were all detected in the solution extracted by H2O, KCl, phosphate-buffered solution (PBS), NaHCO3, ethylenediaminetetraacetic acid-2Na (EDTA-2Na) and ammonium bicarbonate-diethylenetriaminepentaacetic acid (AB-DTPA), but Se6+ was not extracted by NaOH. The Se extracted by single-step extraction methods was weakly correlated with the Se uptake by plants with relatively high Se concentration (>3 mg·kg-1). The abilities of the tested methods to predict Se bioavailability in naturally Se-enriched soils declined in the following order: DGT > soil solution > PBS > KCl > H2O > NaHCO3 > EDTA > DTPA > NaOH. The ratio of CDGT to soil solution Se (Csoln) totaled 0.13, indicating an extremely low Se supply from the soil solid phase to the soil solution. Se measured by DGT was mainly derived from the soluble and exchangeable Se fractions that can accurately reflect the plant-absorbed Se pool. Therefore, the DGT technique is highly applicable in the simultaneous prediction of Se bioavailability in naturally Se-enriched soils.
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Affiliation(s)
- Mengke Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zewei Cui
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mingyue Xue
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qin Peng
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Fei Zhou
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dan Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Quang Toan Dinh
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yongxian Liu
- Agricultural Resource and Environment Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China
| | - Dongli Liang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
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Selenium maintains cytosolic Ca 2+ homeostasis and preserves germination rates of maize pollen under H 2O 2-induced oxidative stress. Sci Rep 2019; 9:13502. [PMID: 31534157 PMCID: PMC6751180 DOI: 10.1038/s41598-019-49760-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/19/2019] [Indexed: 12/17/2022] Open
Abstract
Selenium (Se) displays antioxidant properties that can be exploited, in plants, to counteract abiotic stresses caused by overly-produced reactive oxygen species (ROS). Here, we show that fertigation of maize crops with sodium selenate effectively protects pollen against oxidative stress. Pollen isolated from Se-treated plants (Se1) and untreated controls (Se0) was incubated in vitro with H2O2 to produce oxidative challenge. Given the impact of ROS on Ca2+ homeostasis and Ca2+-dependent signaling, cytosolic Ca2+ was measured to monitor cellular perturbations. We found that H2O2 disrupted Ca2+ homeostasis in Se0 pollen only, while Se1 samples were preserved. The same trend was observed when Se0 samples were treated with sodium selenate or Se-methionine, which recapitulated in vitro the protective capacity of Se-fertigation. Furthermore, we found that germination rates were much better retained in Se1 as compared to Se0 (46% vs 8%, respectively) after exposure to 20 mM H2O2. The same was observed with Se0 pollen treated with Se-methionine, which is the organic form of Se into which most fertigated sodium selenate converts in the plant. These results, together, show a close correlation between ROS, Ca2+ homeostasis and pollen fertility, and provide strong evidence that Se-fertigation is an excellent approach to preserve or enhance agricultural productivity.
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Zhang H, Zhao Z, Zhang X, Zhang W, Huang L, Zhang Z, Yuan L, Liu X. Effects of foliar application of selenate and selenite at different growth stages on Selenium accumulation and speciation in potato (Solanum tuberosum L.). Food Chem 2019; 286:550-556. [DOI: 10.1016/j.foodchem.2019.01.185] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/26/2019] [Accepted: 01/30/2019] [Indexed: 11/17/2022]
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Zhang L, Hu B, Deng K, Gao X, Sun G, Zhang Z, Li P, Wang W, Li H, Zhang Z, Fu Z, Yang J, Gao S, Li L, Yu F, Li Y, Ling H, Chu C. NRT1.1B improves selenium concentrations in rice grains by facilitating selenomethinone translocation. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:1058-1068. [PMID: 30466149 PMCID: PMC6523590 DOI: 10.1111/pbi.13037] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 10/30/2018] [Accepted: 11/08/2018] [Indexed: 05/19/2023]
Abstract
Selenium (Se) is an essential trace element for humans and other animals, yet approximately one billion people worldwide suffer from Se deficiency. Rice is a staple food for over half of the world's population that is a major dietary source of Se. In paddy soils, rice roots mainly take up selenite. Se speciation analysis indicated that most of the selenite absorbed by rice is predominantly transformed into selenomethinone (SeMet) and retained in roots. However, the mechanism by which SeMet is transported in plants remains largely unknown. In this study, SeMet uptake was found to be an energy-dependent symport process involving H+ transport, with neutral amino acids strongly inhibiting SeMet uptake. We further revealed that NRT1.1B, a member of rice peptide transporter (PTR) family which plays an important role in nitrate uptake and transport in rice, displays SeMet transport activity in yeast and Xenopus oocyte. The uptake rate of SeMet in the roots and its accumulation rate in the shoots of nrt1.1b mutant were significantly repressed. Conversely, the overexpression of NRT1.1B in rice significantly promoted SeMet translocation from roots to shoots, resulting in increased Se concentrations in shoots and rice grains. With vascular-specific expression of NRT1.1B, the grain Se concentration was 1.83-fold higher than that of wild type. These results strongly demonstrate that NRT1.1B holds great potential for the improvement of Se concentrations in grains by facilitating SeMet translocation, and the findings provide novel insight into breeding of Se-enriched rice varieties.
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Affiliation(s)
- Lianhe Zhang
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Bin Hu
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Kun Deng
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Xiaokai Gao
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Guoxin Sun
- State Key Lab of Urban and Regional EcologyResearch Center for Eco‐Environmental SciencesChinese Academy of SciencesBeijingChina
| | - Zhengli Zhang
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Peng Li
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Wei Wang
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Hua Li
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Zhihua Zhang
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Zihao Fu
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Jinyong Yang
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Shaopei Gao
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Legong Li
- College of Life ScienceCapital Normal UniversityBeijingChina
| | - Feiyan Yu
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Youjun Li
- Luoyang Key Laboratory of Plant Nutrition and Environmental EcologyAgricultural CollegeHenan University of Science and TechnologyLuoyangChina
| | - Hongqing Ling
- State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
| | - Chengcai Chu
- State Key Laboratory of Plant GenomicsInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
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Nothstein AK, Eiche E, Riemann M, Nick P, Maier P, Tenspolde A, Neumann T. Coupling Langmuir with Michaelis-Menten-A practical alternative to estimate Se content in rice? PLoS One 2019; 14:e0214219. [PMID: 31002711 PMCID: PMC6474650 DOI: 10.1371/journal.pone.0214219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 03/10/2019] [Indexed: 11/18/2022] Open
Abstract
Selenium plays an important, but vastly neglected role in human nutrition with a narrow gap between dietary deficiency and toxicity. For a potential biofortification of food with Se, as well as for toxicity-risk assessment in sites contaminated by Se, modelling of local and global Se cycling is essential. As bioavailability of Se for rice plants depends on the speciation of Se and the resulting interactions with mineral surfaces as well as the interaction with Se uptake mechanisms in plants, resulting plant Se content is complex to model. Unfortunately, simple experimental models to estimate Se uptake into plants from substrates have been lacking. Therefore, a mass balance of Se transfer between lithosphere (represented by kaolinite), hydrosphere (represented by a controlled nutrient solution), and biosphere (represented by rice plants) has been established. In a controlled, closed, lab-scale system, rice plants were grown hydroponically in nutrient solution supplemented with 0–10 000 μg L-1 Se of either selenate or selenite. Furthermore, in a series of batch experiments, adsorption and desorption were studied for selenate and selenite in competition with each of the major nutrient oxy-anions, nitrate, sulfate and phosphate. In a third step, the hydroponical plants experiments were coupled with sorption experiments to study synergy effects. These data were used to develop a mass balance fitting model of Se uptake and partitioning. Adsorption was well-described by Langmuir isotherms, despite competing anions, however, a certain percentage of Se always remained bio-unavailable to the plant. Uptake of selenate or selenite by transporters into the rice plant was fitted with the non-time differentiated Michaelis-Menten equation. Subsequent sequestration of Se to the shoot was better described using a substrate-inhibited variation of the Michaelis-Menten equation. These fitted parameters were then integrated into a mass balance model of Se transfer.
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Affiliation(s)
- Alexandra K. Nothstein
- Karlsruhe Institute of Technology (KIT), Institute for Safety and Environment (SUM), Eggenstein-Leopoldshafen, Baden-Württemberg, Germany
- * E-mail:
| | - Elisabeth Eiche
- Karlsruhe Institute of Technology (KIT), Institute of Applied Geosciences (AGW), Karlsruhe, Baden-Württemberg, Germany
| | - Michael Riemann
- Karlsruhe Institute of Technology (KIT), Molecular Cell Biology, Botanical Institute Karlsruhe, Karlsruhe, Baden-Württemberg, Germany
| | - Peter Nick
- Karlsruhe Institute of Technology (KIT), Molecular Cell Biology, Botanical Institute Karlsruhe, Karlsruhe, Baden-Württemberg, Germany
| | - Philipp Maier
- Karlsruhe Institute of Technology (KIT), Institute of Applied Geosciences (AGW), Karlsruhe, Baden-Württemberg, Germany
| | - Arne Tenspolde
- Karlsruhe Institute of Technology (KIT), Institute of Applied Geosciences (AGW), Karlsruhe, Baden-Württemberg, Germany
| | - Thomas Neumann
- Technical University of Berlin (TUB), Institute of Applied Geosciences, Berlin, Germany
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De Feudis M, D'Amato R, Businelli D, Guiducci M. Fate of selenium in soil: A case study in a maize (Zea mays L.) field under two irrigation regimes and fertilized with sodium selenite. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 659:131-139. [PMID: 30597463 DOI: 10.1016/j.scitotenv.2018.12.200] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 12/13/2018] [Accepted: 12/13/2018] [Indexed: 05/21/2023]
Abstract
Selenium (Se) is a trace element necessary for both human and livestock nutrition. To increase Se human intake, soil Se fertilizations were performed but the fate of the added Se remains unclear. The present research aims to: (1) determine the influence of Se fertilization on the fractionation of Se in soil; (2) assess the influence of water availability on the distribution of soil Se chemical fractions; and (3) monitor the Se content in soil, leachates and plants. To reach these goals, 200 g Se ha-1 was applied to soil as sodium selenite in maize crops under two irrigation regimes, and the Se content in plant, soil chemical fractions and leachates were analyzed. Se application increased the total Se content of the soil, specifically it increased the Se content of the soluble, exchangeable and organic fractions with more pronounced effect in the soils with higher water availability. These differences disappeared over time likely due to the Se loss through volatilization. The hypothesis of Se volatilization is confirmed by the absence of both leachates during the maize growing season and differences among the treatments of Se content in sub-soil samples. Also, although the Se treated plants showed higher Se content than the untreated ones, overall <1% of the added Se was assimilated by plants. Hence, this study demonstrated that the addition of selenite to the soil increased the Se contents of the plants, but the Se does not accumulate in the soil because it is likely lost via volatilization. Further, leaching of Se into groundwater is avoided due to its association with both the soil organic matter and positively charged binding sites of soil, and due to its loss via volatilization. Therefore, soil Se fertilization could increase the nutritional value of plants without consequences on the environment.
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Affiliation(s)
- M De Feudis
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy.
| | - R D'Amato
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - D Businelli
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - M Guiducci
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
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Yin H, Qi Z, Li M, Ahammed GJ, Chu X, Zhou J. Selenium forms and methods of application differentially modulate plant growth, photosynthesis, stress tolerance, selenium content and speciation in Oryza sativa L. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:911-917. [PMID: 30597791 DOI: 10.1016/j.ecoenv.2018.11.080] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/13/2018] [Accepted: 11/19/2018] [Indexed: 05/22/2023]
Abstract
Selenium (Se) is an essential microelement for humans and a beneficial element for plants. Recently, biofortification with Se has emerged as a key strategy to increase crop Se content. Nonetheless, Se species matters a lot as inorganic Se species is mostly toxic to human health. In this study, we investigated the effects of different forms and mode of Se application on Se accumulation and speciation in rice. The results showed that root application of Se remarkably increased Se accumulation, photosynthetic rate, biomass accumulation and tolerance to cadmium stress in rice as compared to foliar application. However, the stimulatory effects of Se varied depending on the Se species used for root feeding. At vegetative stage, root application of Se-(Methyl) selenocysteine caused the highest water extractable Se content in leaves with major contribution from organic Se species such as Se-amino acid and non-amino acid organic Se. Further investigation at reproductive stage revealed that foliar application of sodium selenite (Na2SeO3) resulted in the highest total Se content in rice seeds which was largely attributed to inorganic Se. In contrast, the root application of Na2SeO3 led to the maximum accumulation of organic Se compounds which are advantageous to human health. Moreover, the root application of Se increased antioxidant capacity and selectively enhanced amino acids and essential element content in rice grain. This study deepens our understanding of the Se species in Se-enriched rice and suggests that root application of Se may ensure the safe intake of Se through rice.
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Affiliation(s)
- Hanqin Yin
- Zhejiang Institute of Geological Survey, Xiaojin Road 508, Hangzhou 311203, PR China; School of Environmental Studies, China University of Geosciences, Lumo Road 388, Wuhan 430074, PR China
| | - Zhenyu Qi
- Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, PR China
| | - Mengqi Li
- Zhejiang Institute of Geological Survey, Xiaojin Road 508, Hangzhou 311203, PR China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang 471023, PR China.
| | - Xianyao Chu
- Zhejiang Institute of Geological Survey, Xiaojin Road 508, Hangzhou 311203, PR China.
| | - Jie Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, PR China.
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Qingqing H, Yiyun L, Xu Q, Lijie Z, Xuefeng L, Yingming X. Selenite mitigates cadmium-induced oxidative stress and affects Cd uptake in rice seedlings under different water management systems. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 168:486-494. [PMID: 30423513 DOI: 10.1016/j.ecoenv.2018.10.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 05/13/2023]
Abstract
Cadmium (Cd) is toxic throughout the food chain. Selenium (Se) can mitigate Cd accumulation in rice plants, although it is unclear why it has such effect. The objectives of this study were to investigate the effects of Se application on Cd-induced oxidative stress and antioxidant activities, and the combined effects of Se application and water management on the formation of iron plaque on the rice surface and Fe, Cd, and Se accumulation in rice plants. Rice seedlings were grown in Cd-contaminated soil with or without the addition of Se, and in aerobic or flooded conditions. Exogenous Se reduced Cd-induced oxidative stress. In the flooded treatment, exogenous selenite significantly decreased Cd concentrations in rice tissues, whereas it noticeably enhanced Cd concentrations in rice tissues in the aerobic treatment. Furthermore, selenite addition and flooding promote the formation of iron plaque and increase Fe concentrations in rice tissues. Pearson correlation analysis shows that plant Cd was significantly negatively correlated with Fe concentrations in rice tissues, and plant Fe was significantly positively correlated with Se concentrations in rice tissues, but no significant correlation was found between Cd and Se concentrations Thus, exogenous selenite may indirectly affect Cd uptake by influencing the formation of iron plaque on rice root surface, Fe uptake and Fe levels in rice.
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Affiliation(s)
- Huang Qingqing
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China; Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, People's Republic of China
| | - Liu Yiyun
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China; Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, People's Republic of China
| | - Qin Xu
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China; Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, People's Republic of China
| | - Zhao Lijie
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China; Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, People's Republic of China
| | - Liang Xuefeng
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China; Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, People's Republic of China
| | - Xu Yingming
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China; Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, People's Republic of China.
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Huang G, Ding C, Yu X, Yang Z, Zhang T, Wang X. Characteristics of Time-Dependent Selenium Biofortification of Rice ( Oryza sativa L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:12490-12497. [PMID: 30403867 DOI: 10.1021/acs.jafc.8b04502] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The application of selenite to soil has increasingly been used to produce Se-enriched food. This study investigated the biofortification characteristics of Se in rice after application of selenite to soil at different growth stages. The results showed that the application of Se during booting stage resulted in the highest concentration of Se in brown rice due to the highest upward translocation of Se. More than 90% of Se in the brown rice was organic species, with selenomethionine predominated. The proportion of selenomethionine in the brown rice decreased with the delay in application time. The rice grown in the acidic soil had higher Se concentrations than in the neutral soil. With increasing soil Cd level, Se accumulation and the proportion of Se-methylselenocysteine in the brown rice were reduced. This study provides a theoretical basis for the production of Se-enriched rice in clean soil or slightly to moderately Cd-contaminated soil.
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Affiliation(s)
- Gaoxiang Huang
- CAS Key Laboratory of Soil Environment and Pollution Remediation , Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Changfeng Ding
- CAS Key Laboratory of Soil Environment and Pollution Remediation , Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008 , China
| | - Xiangyang Yu
- Institute of Food Quality and Safety , Jiangsu Academy of Agricultural Sciences , Nanjing 210014 , China
| | - Zhen Yang
- CAS Key Laboratory of Soil Environment and Pollution Remediation , Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008 , China
- College of Life Sciences , Nanjing Normal University , Nanjing , Jiangsu 210046 , China
| | - Taolin Zhang
- CAS Key Laboratory of Soil Environment and Pollution Remediation , Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008 , China
| | - Xingxiang Wang
- CAS Key Laboratory of Soil Environment and Pollution Remediation , Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008 , China
- Ecological Experimental Station of Red Soil , Chinese Academy of Sciences , Yingtan 335211 , China
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Speciation of Selenium in Brown Rice Fertilized with Selenite and Effects of Selenium Fertilization on Rice Proteins. Int J Mol Sci 2018; 19:ijms19113494. [PMID: 30404212 PMCID: PMC6274819 DOI: 10.3390/ijms19113494] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 11/25/2022] Open
Abstract
Foliar Selenium (Se) fertilizer has been widely used to accumulate Se in rice to a level that meets the adequate intake level. The Se content in brown rice (Oryza sativa L.) was increased in a dose-dependent manner by the foliar application of sodium selenite as a fertilizer at concentrations of 25, 50, 75, and 100 g Se/ha. Selenite was mainly transformed to organic Se, that is, selenomethionine in rice. Beyond the metabolic capacity of Se in rice, inorganic Se also appeared. In addition, four extractable protein fractions in brown rice were analyzed for Se concentration. The Se concentrations in the glutelin and albumin fractions saturated with increasing Se concentration in the fertilizer compared with those in the globulin and prolamin fractions. The structural analyses by fluorescence spectroscopy, Fourier transform infrared spectrometry, and differential scanning calorimetry suggest that the secondary structure and thermostability of glutelin were altered by the Se treatments. These alterations could be due to the replacements of cysteine and methionine to selenocysteine and selenomethionine, respectively. These findings indicate that foliar fertilization of Se was effective in not only transforming inorganic Se to low-molecular-weight selenometabolites such as selenoamino acids, but also incorporating Se into general rice proteins, such as albumin, globulin glutelin, and prolamin, as selenocysteine and selenomethionine in place of cysteine and methionine, respectively.
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Fernandes J, Hu X, Ryan Smith M, Go YM, Jones DP. Selenium at the redox interface of the genome, metabolome and exposome. Free Radic Biol Med 2018; 127:215-227. [PMID: 29883789 PMCID: PMC6168380 DOI: 10.1016/j.freeradbiomed.2018.06.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/19/2018] [Accepted: 06/02/2018] [Indexed: 02/06/2023]
Abstract
Selenium (Se) is a redox-active environmental mineral that is converted to only a small number of metabolites and required for a relatively small number of mammalian enzymes. Despite this, dietary and environmental Se has extensive impact on every layer of omics space. This highlights a need for global network response structures to provide reference for targeted, hypothesis-driven Se research. In this review, we survey the Se research literature from the perspective of the responsive physical and chemical barrier between an organism (functional genome) and its environment (exposome), which we have previously termed the redox interface. Recent advances in metabolomics allow molecular phenotyping of the integrated genome-metabolome-exposome structure. Use of metabolomics with transcriptomics to map functional network responses to supplemental Se in mice revealed complex network responses linked to dyslipidemia and weight gain. Central metabolic hubs in the network structure in liver were not directly linked to transcripts for selenoproteins but were, instead, linked to transcripts for glucose transport and fatty acid β-oxidation. The experimental results confirm the survey of research literature in showing that Se interacts with the functional genome through a complex network response structure. The results imply that systematic application of data-driven integrated omics methods to models with controlled Se exposure could disentangle health benefits and risks from Se exposures and also serve more broadly as an experimental paradigm for exposome research.
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Affiliation(s)
- Jolyn Fernandes
- Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - Xin Hu
- Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - M Ryan Smith
- Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - Young-Mi Go
- Department of Medicine, Emory University, Atlanta, GA 30322, United States.
| | - Dean P Jones
- Department of Medicine, Emory University, Atlanta, GA 30322, United States.
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Huang Q, Xu Y, Liu Y, Qin X, Huang R, Liang X. Selenium application alters soil cadmium bioavailability and reduces its accumulation in rice grown in Cd-contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:31175-31182. [PMID: 30187416 DOI: 10.1007/s11356-018-3068-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 08/27/2018] [Indexed: 05/09/2023]
Abstract
Selenium (Se) alleviates cadmium (Cd) accumulation in several plants. Nevertheless, it is still unclear why it has such effect. Thus, this study aimed to investigate the effects of Se on soil Cd bioavailability, and Cd accumulation in flooded rice plants, and to determine the mechanisms underlying these effects. Concentration of Cd and Se in different rice tissues was determined along Cd and Se concentrations in the soil solution and soil Cd fractions. Results showed that exogenous selenite and selenate treatments significantly increased rice grain Se by 4.25- and 2.39-fold and decreased Cd by 36.5% and 25.3% relative to control treatment, respectively. The addition of Se to Cd-contaminated soil significantly decreased total Cd concentration in the soil solution by 11.2-13.0%, increased soil pH by 0.06-0.32 units, and enhanced soil Cd immobilization in relation to control. Exogenous Se also reduced diethylenetriaminepentaacetic acid-Cd, exchangeable, and residual Cd but increased the levels of Cd bound to carbonate and iron and manganese oxides. Thus, amending Cd-contaminated soil with Se may help decrease Cd content as well as increase Se levels in rice grain, as Se may mitigate Cd accumulation in rice plants by increasing soil pH, reducing Cd bioavailability, and inhibiting Cd translocation from roots to shoots.
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Affiliation(s)
- Qingqing Huang
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
| | - Yingming Xu
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China.
- Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China.
| | - Yiyun Liu
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
| | - Xu Qin
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
| | - Rong Huang
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
| | - Xuefeng Liang
- Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, People's Republic of China
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Wan Y, Camara AY, Yu Y, Wang Q, Guo T, Zhu L, Li H. Cadmium dynamics in soil pore water and uptake by rice: Influences of soil-applied selenite with different water managements. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 240:523-533. [PMID: 29758526 DOI: 10.1016/j.envpol.2018.04.044] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/08/2018] [Accepted: 04/08/2018] [Indexed: 06/08/2023]
Abstract
Cadmium (Cd) in rice grains is a potential threat to human health. This study investigated the effects of selenite fertilisation (0 mg kg-1, 0.5 mg kg-1, and 1.0 mg kg-1) on soil solution Cd dynamics and rice uptake. Rice was grown in two Cd-contaminated soils in Jiangxi and Hunan Provinces under two different sets of conditions: aerobic and flooded. The experiments were conducted in pots. The plants were harvested at the seedling stage and at maturity to determine their Cd levels. Soil solutions were also extracted during the growing season to monitor Cd dynamics. The results showed that in the Jiangxi soil (pH 5.25), Cd concentrations in the soil solutions, seedlings, and mature rice plants were higher under aerobic than under flooded water management conditions. In the Hunan soil (pH 7.26), however, flooding decreased Cd levels in the rice seedlings but not in mature plants. Selenite additions to the Hunan soil decreased Cd concentrations in the soil solutions and in the mature rice plants. These effects were not observed for the solutions or the plants from Jiangxi soil amended with selenite. Relative to the control treatment, 0.5 mg kg-1 selenite decreased the rice grain Cd content by 45.2% and 67.7% under aerobic and flooding conditions, respectively. The results demonstrated that water management regimes affected rice Cd uptake more effectively in Jiangxi than in Hunan soil, whereas selenite addition was more effective in Hunan than in Jiangxi soil. Selenite addition was also more effective at reducing rice grain Cd levels when it was applied under flooding than under aerobic conditions.
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Affiliation(s)
- Yanan Wan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Aboubacar Younoussa Camara
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China; Department of Water/Forest and Environment, Higher Institute of Agronomy and Veterinary of Faranah, B.P. 131, Equatorial Guinea
| | - Yao Yu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Qi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Tianliang Guo
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Lina Zhu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Huafen Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing, 100193, People's Republic of China.
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44
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Wan Y, Camara AY, Huang Q, Yu Y, Wang Q, Li H. Arsenic uptake and accumulation in rice (Oryza sativa L.) with selenite fertilization and water management. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 156:67-74. [PMID: 29529515 DOI: 10.1016/j.ecoenv.2018.02.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/24/2018] [Accepted: 02/26/2018] [Indexed: 05/21/2023]
Abstract
The accumulation of arsenic (As) in rice grain is a potential threat to human health. Our study investigated the possible mediatory role of selenite fertilization on As uptake and accumulation by rice (Oryza sativa L.) under different water management regimes (aerobic or flooded) in a pot experiment. Soil solutions were also extracted during the growing season to monitor As dynamics. Results showed that As contents in the soil solutions, seedlings, and mature rice were higher under flooded than under aerobic water management. Under aerobic conditions, selenite additions slightly increased As concentrations in soil solutions (in the last two samplings), but decreased As levels in rice plants. Relative to the control, 0.5 mg kg-1 selenite decreased rice grain As by 27.5%. Under flooded conditions, however, selenite additions decreased As in soil solutions, while increased As in rice grain. Tendencies also showed that selenite additions decreased the proportion of As in rice shoots both at the seedling stage and maturity, and were more effective in aerobic soil. Our results demonstrate that the effect of selenite fertilizer on As accumulation by rice is related to water management.
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Affiliation(s)
- Yanan Wan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, People's Republic of China
| | - Aboubacar Younoussa Camara
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, People's Republic of China; Department of Water/Forest and Environment, Higher Institute of Agronomy and Veterinary of Faranah, B.P. 131, Republic of Guinea
| | - Qingqing Huang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, People's Republic of China; Gro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, People's Republic of China
| | - Yao Yu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, People's Republic of China
| | - Qi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, People's Republic of China
| | - Huafen Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, People's Republic of China.
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45
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Xiao K, Song M, Liu J, Chen H, Li D, Wang K. Differences in the bioaccumulation of selenium by two earthworm species (Pheretima guillemi and Eisenia fetida). CHEMOSPHERE 2018; 202:560-566. [PMID: 29597172 DOI: 10.1016/j.chemosphere.2018.03.094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 03/11/2018] [Accepted: 03/14/2018] [Indexed: 06/08/2023]
Abstract
Information on the bioaccumulation of selenium (Se) in soil invertebrates (e.g. earthworms) is rather scarce. In the present study, bioaccumulation of Se in two eco-physiologically different earthworms, namely anecic Pheretima guillemi and epigeic Eisenia fetida, was determined after 28 days exposure to a successive doses of Se-spiked soil, specifically 0.5, 5, 50, and 200 μg Se g-1 soil. The results showed that Se concentration in earthworms elevated with increasing exposure levels, and maximums were up to 54.6 and 83.0 μg g-1 dry weight in Pheretima guillemi and Eisenia fetida, respectively, after 4 weeks exposure to 200 μg Se g-1 soil. Exposure to Se caused significant inhibition on earthworm growth, with the fresh weight loss ranging from 8.9% to 80.5%. Bioaccumulation factors (BAFs), empirically-derived and non-steady state, ranged from 0.12 to 4.17 and generally declined at higher exposure levels. Moreover, BAFs of Pheretima guillemi were higher than those of Eisenia fetida in low-dose Se-spiked soils, but the opposite was true in high-dose soils, indicating there is a species-specific response to exposure of Se between different earthworms. Further research is thus needed to reveal the accumulation pattern of Se in a wider range of earthworm species other than Eisenia fetida, which allows a better risk assessment of excessive Se to soil invertebrates and higher order organisms.
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Affiliation(s)
- Kongcao Xiao
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Huanjiang Observation and Research Station for Karst Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, China
| | - Min Song
- College of Agronomy, Hunan Agricultural University, Changsha 410125, China
| | - Jing Liu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Huanjiang Observation and Research Station for Karst Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Chen
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Huanjiang Observation and Research Station for Karst Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, China
| | - Dejun Li
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Huanjiang Observation and Research Station for Karst Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, China.
| | - Kelin Wang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Huanjiang Observation and Research Station for Karst Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, China
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46
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He Y, Xiang Y, Zhou Y, Yang Y, Zhang J, Huang H, Shang C, Luo L, Gao J, Tang L. Selenium contamination, consequences and remediation techniques in water and soils: A review. ENVIRONMENTAL RESEARCH 2018; 164:288-301. [PMID: 29554620 DOI: 10.1016/j.envres.2018.02.037] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/04/2018] [Accepted: 02/26/2018] [Indexed: 05/21/2023]
Abstract
Selenium (Se) contamination in surface and ground water in numerous river basins has become a critical problem worldwide in recent years. The exposure to Se, either direct consumption of Se or indirectly may be fatal to the human health because of its toxicity. The review begins with an introduction of Se chemistry, distribution and health threats, which are essential to the remediation techniques. Then, the review provides the recent and common removal techniques for Se, including reduction techniques, phytoremediation, bioremediation, coagulation-flocculation, electrocoagulation (EC), electrochemical methods, adsorption, coprecipitation, electrokinetics, membrance technology, and chemical precipitation. Removal techniques concentrate on the advantages, drawbacks and the recent achievements of each technique. The review also takes an overall consideration of experimental conditions, comparison criteria and economic aspects.
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Affiliation(s)
- Yangzhuo He
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Yujia Xiang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Yaoyu Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China.
| | - Yuan Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Jiachao Zhang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China.
| | - Hongli Huang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Cui Shang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Jun Gao
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China
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Andrade GF, Paniz FP, Martins AC, Rocha BA, da Silva Lobato AK, Rodrigues JL, Cardoso-Gustavson P, Masuda HP, Batista BL. Agricultural use of Samarco's spilled mud assessed by rice cultivation: A promising residue use? CHEMOSPHERE 2018; 193:892-902. [PMID: 29874764 DOI: 10.1016/j.chemosphere.2017.11.099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 11/12/2017] [Accepted: 11/19/2017] [Indexed: 06/08/2023]
Abstract
Mining activity is one of the main responsible for accumulation of potentially toxic elements in the environment. These contaminants are absorbed by plants served as food that could be a risk to human health, such rice. Rice is a staple food with known accumulation of toxic elements. The recent collapse of a mining dam operated by Samarco Mining Company spilled around 50 million m3 of Fe-mining waste in the environment, including rivers and farming areas. In the present study, concentrations of As, Cd, Hg, Pb, Co, Zn, Mn, Cu, Fe, Al, Se, and Sr were determined in soils, roots and grains of rice plants cultivated in soil containing Samarco's residual mud (0, 16, 34 and 50%). Further, rice plant agronomic parameters (chlorophyll, carotenoids, grain yield, mass, height) were assessed. Rice cultivated at Samarco's residual mud produced grains with low levels of As, Cd and Pb. However, the excess of mud (50%) during the rice cultivation reduced roots' growth and grains yield. Chlorophyll (a and b) and carotenoids contents were significantly lower in all mud cultivations, mainly mud-50%. Our findings suggest that plant alterations induced by the mud were associated to the deficiency of nutrients and the physical properties of the mud. Soil fertilization by organic matter and top soil provided conditions for plant development. Therefore, considering the experimental conditions here used, we showed that is possible the use of the affected land for agriculture and reforestation after soil amendment.
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Affiliation(s)
- Geyssa Ferreira Andrade
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, SP, Brazil
| | - Fernanda Pollo Paniz
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, SP, Brazil
| | - Airton Cunha Martins
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
| | - Bruno Alves Rocha
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, SP, Brazil
| | - Allan Klynger da Silva Lobato
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Rodovia PA 256, Paragominas, Pará, Brazil
| | - Jairo Lisboa Rodrigues
- Instituto de Ciência, Engenharia e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 39803-371 Teófilo Otoni, MG, Brazil
| | - Poliana Cardoso-Gustavson
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, SP, Brazil
| | - Hana Paula Masuda
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, SP, Brazil
| | - Bruno Lemos Batista
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, SP, Brazil.
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48
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Fang Y, Zhang Y, Wang M, Pei F, Xie M, Li P, Hu Q. In vitrobioaccessibility and speciation changes of selenium inPleurotus eryngiiduring the growing stage. Food Funct 2018; 9:4493-4499. [DOI: 10.1039/c8fo00566d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The production ofPleurotus eryngiiby selenium (Se) biofortification is an effective way to improve the demand for Se in humans.
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Affiliation(s)
- Yong Fang
- College of Food Science and Engineering
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety
- Nanjing 210023
- China
| | - Yingyue Zhang
- College of Food Science and Engineering
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety
- Nanjing 210023
- China
| | - Mingyang Wang
- College of Food Science and Technology
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Fei Pei
- College of Food Science and Engineering
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety
- Nanjing 210023
- China
| | - Minhao Xie
- College of Food Science and Engineering
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety
- Nanjing 210023
- China
| | - Peng Li
- College of Food Science and Engineering
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety
- Nanjing 210023
- China
| | - Qiuhui Hu
- College of Food Science and Engineering
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety
- Nanjing 210023
- China
- College of Food Science and Technology
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49
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Kopittke PM, Wang P, Lombi E, Donner E. Synchrotron-based X-Ray Approaches for Examining Toxic Trace Metal(loid)s in Soil-Plant Systems. JOURNAL OF ENVIRONMENTAL QUALITY 2017; 46:1175-1189. [PMID: 29293828 DOI: 10.2134/jeq2016.09.0361] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Elevated levels of trace metal(loid)s reduce plant growth, both in soils contaminated by industrial activities and in acid agricultural soils. Although the adverse effects of trace metal(loid)s have long been recognized, there remains much unknown both about their behavior in soils, their toxicity to plants, and the mechanisms that plants use to tolerate elevated concentrations. Synchrotron-based approaches are being utilized increasingly in soil-plant systems to examine toxic metal(loid)s. In the present review, brief consideration is given to the theory of synchrotron radiation. Thereafter, we review the use of synchrotron-based approaches for the examination of various trace metal(loid)s in soil-plant systems, including aluminum, chromium, manganese, cobalt, nickel, copper, zinc, arsenic, selenium, and cadmium. Within the context of this review, X-ray absorption spectroscopy (XAS) and X-ray fluorescence microscopy (μ-XRF) are of particular interest. These techniques can provide in situ analyses of the distribution and speciation of metal(loid)s in soil-plant systems. The information presented here serves not only to understand the behavior of trace metals in soil-plant systems, but also to provide examples of the potential applications of synchrotron radiation that can be used to advantage in other studies.
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Effects of different water management on absorption and accumulation of selenium in rice. Saudi J Biol Sci 2017; 25:1178-1182. [PMID: 30174519 PMCID: PMC6117235 DOI: 10.1016/j.sjbs.2017.10.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/08/2017] [Accepted: 10/10/2017] [Indexed: 10/31/2022] Open
Abstract
Rice is the staple food for more than half of the world's population, but selenium (Se) is low in many rice growing countries. Water management model affects rice soil pH and Eh, and then affects the bioavailability of Se in soil. A pot experiment was conducted to investigate the effects of water management on soil Se species, dynamics and selenium uptake by rice plants. Sodium selenite was added to the soil so that the soil selenium content reached 0.5 mg kg-1 to study the effects of 3 different water management modes on soil selenium uptake by rice plants. These three modes are flood irrigation (F), aerobic irrigation (A) and alternate flood and aerobic irrigation (AFA). The results showed that flooded irrigation treatment increased the soil soluble selenium concentration, and the selenium in soil solution mainly existed in the form of selenite and selenomethionine selenium oxide. The content of selenium in grain was 2.44 and 1.84 times that of flooded irrigation treatment under A and AFA respectively. The content of selenium in straw was 1.32 and 1.58 times that of flooded treatment under A and AFA respectively. After rice grain enzyme hydrolysis, HPLC-ICP-MS analysis showed that Selenomethionine was the main selenium speciation in rice grains. This study showed that aerobic flooded treatment is one of the most effective ways to increase selenium content in rice field.
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