1
|
Dai Z, Yu L, Ma P, Wang Y, An S, Liu M. Synergistic effects of silicon and goethite co-application in alleviating cadmium stress in rice (Oryza sativa L.): Insights into plant growth and iron plaque formation mechanisms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 281:116570. [PMID: 38896902 DOI: 10.1016/j.ecoenv.2024.116570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 05/18/2024] [Accepted: 06/05/2024] [Indexed: 06/21/2024]
Abstract
Rice is one of the most important staple food crops; however, it is prone to cadmium (Cd) accumulation, which has negative health effects. Therefore, methods to reduce Cd uptake by rice are necessary. At present, there is limited research on the effects of co-application of silicon (Si) and goethite in mitigating Cd stress in rice. Furthermore, the specific mechanisms underlying the effects of their combined application on iron plaque formation in rice roots remain unclear. Therefore, this study analyzed the effects of the combined application of Si and goethite on the biomass, physiological stress indicators, Cd concentration, and iron plaques of rice using hydroponic experiments. The results revealed that co-treatment with both Si and goethite increased the plant height and dry weight, superoxide dismutase and catalase activities, photosynthetic pigment concentration, and root activity. Moreover, this treatment decreased the malondialdehyde concentration, repaired epidermal cells, reduced the Cd concentration in the roots by 57.2 %, and increased the number of iron plaques and Cd concentration by 150.9 % and 266.2 % in the amorphous and crystalline fractions, respectively. The Cd/Fe ratio in amorphous iron plaques also increased. Our findings suggest that goethite serves as a raw material for iron plaque formation, while Si enhances the oxidation capacity of rice roots. The application of a combination of Si and goethite increases the quantity and quality of iron plaques, enhancing its Cd fixation capacity. This study provides theoretical evidence for the effective inhibition of Cd uptake by iron plaques in rice, providing insights into methods for the remediation of Cd contamination.
Collapse
Affiliation(s)
- Zhaoyi Dai
- College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Lei Yu
- College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Pan Ma
- College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yaojing Wang
- College of Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Shuai An
- Shenyang Center of the China Geological Survey, Shenyang, Liaoning 110034, China
| | - Mingda Liu
- College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China.
| |
Collapse
|
2
|
Zhou C, Zhu L, Zhao T, Dahlgren RA, Xu J. Fertilizer application alters cadmium and selenium bioavailability in soil-rice system with high geological background levels. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 350:124033. [PMID: 38670427 DOI: 10.1016/j.envpol.2024.124033] [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: 11/09/2023] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 04/28/2024]
Abstract
The co-occurrence of cadmium (Cd) pollution and selenium (Se) deficiency commonly exists in global soils, especially in China. As a result, there is great interest in developing practical agronomic strategies to simultaneously achieve Cd remediation and Se mobilization in paddy soils, thereby enhancing food quality/safety. To this end, we conducted a field-plot trial on soils having high geological background levels of Cd (0.67 mg kg-1) and Se (0.50 mg kg-1). We explored 12 contrasting fertilizers (urea, potassium sulfate (K2SO4), calcium-magnesium-phosphate (CMP)), amendments (manure and biochar) and their combinations on Cd/Se bioavailability. Soil pH, total organic carbon (TOC), soil available Cd/Se, Cd/Se fractions and Cd/Se accumulation in different rice components were determined. No significant differences existed in mean grain yield among treatments. Results showed that application of urea and K2SO4 decreased soil pH, whereas the CMP fertilizer and biochar treatments increased soil pH. There were no significant changes in TOC concentrations. Three treatments (CMP, manure, biochar) significantly decreased soil available Cd, whereas no treatment affected soil available Se at the maturity stage. Four treatments (CMP, manure, biochar and manure+urea+CMP+K2SO4) achieved our dual goal of Cd reduction and Se enrichment in rice grain. Structural equation modeling (SEM) demonstrated that soil available Cd and root Cd were negatively affected by pH and organic matter (OM), whereas soil available Se was positively affected by pH. Moreover, redundancy analysis (RDA) showed strong positive correlations between soil available Cd, exchangeable Cd and reducible Cd with grain Cd concentration, as well as between pH and soil available Se with grain Se concentration. Further, there was a strong negative correlation between residual Cd/Se (non-available fraction) and grain Cd/Se concentrations. Overall, this study identified the primary factors affecting Cd/Se bioavailability, thereby providing new guidance for achieving safe production of Se-enriched rice through fertilizer/amendment management of Cd-enriched soils.
Collapse
Affiliation(s)
- Cheng Zhou
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Lianghui Zhu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Tingting Zhao
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Randy A Dahlgren
- Department of Land, Air and Water Resources, University of California, Davis, 95616, CA, USA
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
3
|
Qin L, Yu L, Wang M, Sun X, Wang J, Liu J, Wang Y, White JC, Chen S. The environmental risk threshold (HC 5) for Cd remediation in Chinese agricultural soils. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 362:121316. [PMID: 38838540 DOI: 10.1016/j.jenvman.2024.121316] [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: 01/18/2024] [Revised: 05/04/2024] [Accepted: 05/30/2024] [Indexed: 06/07/2024]
Abstract
Given the increasing concern over Cd contamination of agricultural soils in China, reducing the availability of the toxic metal has become an important remedial strategy. However, the lack of a unified evaluation framework complicates the assessment of remediation efficiency of different practices. Here, we evaluated the general extraction method (GEM) of available Cd in nine typical soil types by comparing extraction agents, including CaCl2, EDTA, Mehlich-Ⅲ, HCl and DTPA. The safe grain concentration of different agricultural products from National Food Safety Standards Limits of Contaminants in Food (GB 2762-2022) was then applied to understand soil limited available Cd concentration based on dose-response curves. We also derived environmental risk threshold (HC5) values for Cd remediation in agricultural soils by constructing species sensitivity distribution (SSD) curves. The results showed that Mehlich-Ⅲ best predicted Cd accumulation in crops (with 76.5% of explanation of grain Cd) and was selected as the GEM of soil available Cd for subsequent analyses. The regression coefficient (R2) of dose-response curves fitting between Cd absorption in crop tissues and soil available Cd extracted by GEM based on 30 different crop species varied from 51.0% to 79.5%, and the derived limit concentration of soil available Cd based on standard GB 2762-2022 was 0.18-0.76 mg‧kg-1. An HC5 of 0.19 mg‧kg-1 was then calculated, meaning that a concentration of available Cd in agricultural soil below 0.19 mg‧kg-1 ensures that 95% of agricultural products meet the quality and safety requirements of standard GB 2762-2022. The prediction model was well verified in the field test, indicating that can correctly estimate the soil available Cd based on the content of Cd in plant. This study provides a robust scientific framework for deriving the risk threshold for Cd remediation in agricultural soils and could be quite useful for establishing soil remediation standards.
Collapse
Affiliation(s)
- Luyao Qin
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China; Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06511, USA
| | - Lei Yu
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Meng Wang
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
| | - Xiaoyi Sun
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Jing Wang
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Jiaxiao Liu
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Yi Wang
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06511, USA
| | - Jason C White
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06511, USA
| | - Shibao Chen
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
| |
Collapse
|
4
|
Guo K, Zhao Y, Zhang Y, Yang J, Chu Z, Zhang Q, Xiao W, Huang B, Li T. Effects of wollastonite and phosphate treatments on cadmium bioaccessibility in pak choi ( Brassica rapa L. ssp. chinensis) grown in contaminated soils. Front Nutr 2024; 11:1337996. [PMID: 38638296 PMCID: PMC11024290 DOI: 10.3389/fnut.2024.1337996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 03/12/2024] [Indexed: 04/20/2024] Open
Abstract
Cadmium (Cd) contamination of soil can strongly impact human health through the food chain due to uptake by crop plants. Inorganic immobilizing agents such as silicates and phosphates have been shown to effectively reduce Cd transfer from the soil to cereal crops. However, the effects of such agents on total Cd and its bioaccessibility in leafy vegetables are not yet known. Pak choi (Brassica rapa L. ssp. chinensis) was here selected as a representative leafy vegetable to be tested in pots to reveal the effects of silicate-phosphate amendments on soil Cd chemical fractions, total plant Cd levels, and plant bioaccessibility. The collected Cd contaminated soil was mixed with control soil at 1:0, 1:1, 1:4, 0:1 with a view to Cd high/moderate/mild/control soil samples. Three heavy metal-immobilizing agents: wollastonite (W), potassium tripolyphosphate (KTPP), and sodium hexametaphosphate (SHMP) were added to the soil in order to get four different treatment groups, i.e., control (CK), application of wollastonite alone (W), wollastonite co-applied with KTPP (WKTPP), application of wollastonite co-applied with SHMP (WSHMP) for remediation of soils with different levels of Cd contamination. All three treatments increased the effective bio-Cd concentration in the soils with varying levels of contamination, except for W under moderate and heavy Cd contamination. The total Cd concentration in pak choi plants grown in mildly Cd-contaminated soil was elevated by 86.2% after WKTPP treatment compared to the control treatment could function as a phytoremediation aid for mildly Cd-contaminated soil. Using an in vitro digestion method (physiologically based extraction test) combined with transmission electron microscopy, silicate and phosphorus agents were found to reduce the bioaccessibility of Cd in pak choi by up to 66.13% with WSHMP treatment. Application of silicate alone reduced soil bio-Cd concentration through the formation of insoluble complexes and silanol groups with Cd, but the addition of phosphate may have facilitated Cd translocation into pak choi by first co-precipitating with Ca in wollastonite while simultaneously altering soil pH. Meanwhile, wollastonite and phosphate treatments may cause Cd to be firmly enclosed in the cell wall in an insoluble form, reducing its translocation to edible parts and decreasing the bioaccessibility of Cd in pak choi. This study contributes to the mitigation of Cd bioaccessibility in pak choi by reducing soil Cd concentration through in situ remediation and will help us to extend the effects of wollastonite and phosphate on Cd bioaccessibility to other common vegetables. Therefore, this study thus reveals effective strategies for the remediation of soil Cd and the reduction of Cd bioaccessibility in crops based on two indicators: total Cd and Cd bioaccessibility. Our findings contribute to the development of methods for safer cultivation of commonly consumed leafy vegetables and for soil remediation.
Collapse
Affiliation(s)
- Kexin Guo
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji’nan, China
| | - Yuehua Zhao
- The 7th Institute of Geology & Mineral Exploration of Shandong Province, Linyi, China
| | - Yang Zhang
- Weifang Binhai Ecological Environment Monitoring Center, Weifang, China
| | - Jinbo Yang
- The 7th Institute of Geology & Mineral Exploration of Shandong Province, Linyi, China
| | - Zhiyuan Chu
- The 7th Institute of Geology & Mineral Exploration of Shandong Province, Linyi, China
| | - Qiang Zhang
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji’nan, China
| | - Wenwei Xiao
- Guangzhou Hexin Instrument Co., Ltd., Guangzhou, China
| | - Bin Huang
- Zhongchuang Guoke Scientific Instrument (Shandong) Co., Ji’nan, China
| | - Tianyuan Li
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji’nan, China
| |
Collapse
|
5
|
Cao R, Kang G, Zhang W, Zhou J, Xie W, Liu Z, Xu L, Hu F, Li Z, Li H. Biochar loaded with ferrihydrite and Bacillus pseudomycoides enhances remediation of co-existed Cd(II) and As(III) in solution. BIORESOURCE TECHNOLOGY 2024; 395:130323. [PMID: 38228221 DOI: 10.1016/j.biortech.2024.130323] [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: 10/31/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/18/2024]
Abstract
Bioremediation is one of the effective ways for heavy metal remediation. Iron-modified biochar (F@BC) loaded with Bacillus pseudomycoides (BF@BC) was synthesized to remove the coexistence of cadmium (Cd) and arsenic (As) in solutions. The results showed that B. pseudomycoides significantly increased the removal rate of Cd(II) by enhancing the specific surface area and Si-containing functional groups of biochar (BC). The surface of F@BC was enriched with Fe-containing functional groups, significantly improving As(III) adsorption. The combination of ferrihydrite and strains on BF@BC enhanced the removal of Cd(II) and As(III). It also promoted the oxidation of As(III) by producing an abundance of hydroxyl radicals (·OH). The maximum saturated adsorption capacity of BF@BC for Cd(II) and As(III) increased by 52.47% and 2.99 folds compared with BC, respectively. This study suggests that biochar loaded with Fe and bacteria could be sustainable for the remediation of the coexistence of Cd(II) and As(III) in solutions.
Collapse
Affiliation(s)
- Rui Cao
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Guodong Kang
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, Nanjing, Jiangsu, 210042, China
| | - Weiwen Zhang
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Jihai Zhou
- Provincial Collaborative Innovation Center for Restoration and Reconstruction of Degraded Ecosystems in Wanjiang Basin, College of Ecology and Environment, Anhui Normal University, Wuhu 241002, China
| | - Wangliang Xie
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Zhenzhen Liu
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Li Xu
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China; Sanya Institute of Nanjing Agricultural University, Sanya, Hainan, 572000, China
| | - Feng Hu
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, Jiangsu, 210095, China
| | - Zhen Li
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu, Sichuan, 610059, China.
| | - Huixin Li
- Laboratory of Soil Ecology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, Jiangsu, 210095, China.
| |
Collapse
|
6
|
Tan D, Mei C, Yang L, Chen J, Rasul F, Cai K. Si-enriched biochars improved soil properties, reduced Cd bioavailability while enhanced Cd translocation to grains of rice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:12194-12206. [PMID: 38227260 DOI: 10.1007/s11356-024-31935-9] [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: 07/31/2023] [Accepted: 01/04/2024] [Indexed: 01/17/2024]
Abstract
Biochar and silicon (Si) have been widely considered to play an important role in mitigating cadmium (Cd) toxicity. In this study, wild-type rice (WT, high-Si) and Si-deficient mutant rice (lsi1, low-Si) were used as raw materials to prepare biochar at 500℃; the Si concentrations of high- and low-Si biochar were 15.9% and 5.3%, respectively. The impacts of different application rates (0%, 2%, 4%) of high- and low-Si biochars on soil chemical properties, Si and Cd fractions and availability, Cd absorption, and translocation were investigated. The results showed that both types of biochars increased soil pH, soil available nitrogen, and available phosphorus and potassium; and promoted Si uptake and plant growth of rice. Soil available Si, CaCl2-Si, acetic-Si, H2O2-Si, oxalate-Si, and Na2CO3-Si were also increased by biochar supply, especially for high-Si biochar treatments. In addition, both types of biochars had no effects on soil total Cd, but reduced soil available Cd by 2-17% in early season 2022, and reduced oxidizable Cd and residual Cd. Biochar application did not influence Cd concentrations in roots, stems, and leaves, but significantly increased Cd uptake and transport from stems and leaves to grains. The results suggested that Si-rich biochar could improve soil nutrients, change soil Si/Cd fractions and availability, promote rice growth but increase the risk of Cd toxicity in grains, indicating the complex of straw biochar in remediating Cd-contaminated paddy soil.
Collapse
Affiliation(s)
- Dan Tan
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
- Key Laboratory of Tropical Agro-Environment, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Chuang Mei
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
- Key Laboratory of Tropical Agro-Environment, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Liwen Yang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
- Key Laboratory of Tropical Agro-Environment, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Jianzhu Chen
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
- Key Laboratory of Tropical Agro-Environment, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Fahd Rasul
- Agro-Climatology Laboratory, Department of Agronomy, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Kunzheng Cai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
- Key Laboratory of Tropical Agro-Environment, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
| |
Collapse
|
7
|
Hussain B, Riaz L, Li K, Hayat K, Akbar N, Hadeed MZ, Zhu B, Pu S. Abiogenic silicon: Interaction with potentially toxic elements and its ecological significance in soil and plant systems. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122689. [PMID: 37804901 DOI: 10.1016/j.envpol.2023.122689] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/28/2023] [Accepted: 10/02/2023] [Indexed: 10/09/2023]
Abstract
Abiogenic silicon (Si), though deemed a quasi-nutrient, remains largely inaccessible to plants due to its prevalence within mineral ores. Nevertheless, the influence of Si extends across a spectrum of pivotal plant processes. Si emerges as a versatile boon for plants, conferring a plethora of advantages. Notably, it engenders substantial enhancements in biomass, yield, and overall plant developmental attributes. Beyond these effects, Si augments the activities of vital antioxidant enzymes, encompassing glutathione (GSH), catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD), among others. It achieves through the augmentation of reactive oxygen species (ROS) scavenging gene expression, thus curbing the injurious impact of free radicals. In addition to its effects on plants, Si profoundly ameliorates soil health indicators. Si tangibly enhances soil vitality by elevating soil pH and fostering microbial community proliferation. Furthermore, it exerts inhibitory control over ions that could inflict harm upon delicate plant cells. During interactions within the soil matrix, Si readily forms complexes with potentially toxic metals (PTEs), encapsulating them through Si-PTEs interactions, precipitative mechanisms, and integration within colloidal Si and mineral strata. The amalgamation of Si with other soil amendments, such as biochar, nanoparticles, zeolites, and composts, extends its capacity to thwart PTEs. This synergistic approach enhances soil organic matter content and bolsters overall soil quality parameters. The utilization of Si-based fertilizers and nanomaterials holds promise for further increasing food production and fortifying global food security. Besides, gaps in our scientific discourse persist concerning Si speciation and fractionation within soils, as well as its intricate interplay with PTEs. Nonetheless, future investigations must delve into the precise functions of abiogenic Si within the physiological and biochemical realms of both soil and plants, especially at the critical juncture of the soil-plant interface. This review seeks to comprehensively address the multifaceted roles of Si in plant and soil systems during interactions with PTEs.
Collapse
Affiliation(s)
- Babar Hussain
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China
| | - Luqman Riaz
- Department of Environmental Sciences, Kohsar University Murree, 47150, Punjab, Pakistan
| | - Kun Li
- Sichuan Academy of Forestry, Chengdu, 610081, Sichuan, China
| | - Kashif Hayat
- Key Laboratory of Pollution Exposure and Health Intervention, Interdisciplinary Research Academy, Zhejiang Shuren University, Hangzhou, 310015, China
| | - Naveed Akbar
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China
| | | | - Bowei Zhu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China
| | - Shengyan Pu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China.
| |
Collapse
|
8
|
Jiang Y, Wei C, Jiao Q, Li G, Alyemeni MN, Ahmad P, Shah T, Fahad S, Zhang J, Zhao Y, Liu F, Liu S, Liu H. Interactive effect of silicon and zinc on cadmium toxicity alleviation in wheat plants. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131933. [PMID: 37421854 DOI: 10.1016/j.jhazmat.2023.131933] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/12/2023] [Accepted: 06/23/2023] [Indexed: 07/10/2023]
Abstract
Silicon (Si) and Zinc (Zn) have been frequently used to alleviate cadmium (Cd) toxicity, which are feasible strategies for crop safety production. However, the mechanisms underlying the interaction of Si and Zn on alleviating Cd toxicity are not well understood. A hydroponic system was adopted to evaluate morphological, physiological-biochemical responses, and related gene expression of wheat seedlings to Si (1 mM) and Zn (50 µM) addition under Cd stress (10 µM). Cd induced obvious inhibition of wheat growth by disturbing photosynthesis and chlorophyll synthesis, provoking generation of reactive oxygen species (ROS) and interfering ion homeostasis. Cd concentration was decreased by 68.3%, 43.1% and 73.3% in shoot, and 78.9%, 44.1% and 85.8% in root by Si, Zn, and combination of Si with Zn, relative to Cd only, respectively. Si and Zn effectively ameliorated Cd toxicity and enhanced wheat growth; but single Si or combination of Si with Zn had more efficient ability on alleviating Cd stress than only Zn, indicating Si and Zn have synergistic effect on Cd toxicity; Interaction of them alleviated oxidative stress by reducing ROS content, improving AsA-GSH cycle and antioxidant enzymes activities, and regulating Cd into vacuole through PC-Cd complexes transported by HMA3 transporter. Our results suggest that fertilizers including Si and Zn should be made to reduce Cd content, which will beneficial for food production and safety.
Collapse
Affiliation(s)
- Ying Jiang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Chang Wei
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Qiujuan Jiao
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Gezi Li
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Mohammed Nasser Alyemeni
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Parvaiz Ahmad
- Department of Botany, GDC Pulwama, 192301 Jammu and Kashmir, India
| | - Tariq Shah
- Plant Science Research Unit, United States Department for Agriculture (USDA), ARS, Raleigh, NC, USA
| | - Shah Fahad
- Department of Agronomy, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa 23200, Pakistan
| | - Jingjing Zhang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Ying Zhao
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Fang Liu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Shiliang Liu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China
| | - Haitao Liu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, PR China.
| |
Collapse
|
9
|
Pan B, Wang W, Liu B, Cai K, Tian J, Cai Y. Significant difference in the efficacies of silicon application regimes on cadmium species and environmental risks in rice rhizosphere. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 327:121521. [PMID: 36997144 DOI: 10.1016/j.envpol.2023.121521] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/19/2023] [Accepted: 03/26/2023] [Indexed: 06/19/2023]
Abstract
Silicon (Si) is commonly applied as base-fertilizer or foliar-topdressing to palliate the uptake-translocation-accumulation of cadmium (Cd) in rice through Si-Cd antagonism. However, little is known about the fate of Cd in rice rhizosphere soil and its eco-environmental effects under different Si treatments. Here, systematic works had been carried out to elucidate the Cd species, soil properties, and environmental risks in rice rhizosphere driven by different Si soil-fertilization regimes including CK (without Si-addition), TSi (added before transplanting stage), JSi (added at jointing stage), and TJSi (split into two equal parts, added half before transplanting and another half at jointing stage). Results showed that TJSi outperformed the rest of fertilization regimes. The solid-phase-Cd concentrations treated with TSi, TJSi and JSi were increased by 4.18%, 5.73% and 3.41%, respectively, when compared to CK. The labile Cd (F1+F2) proportion of TJSi was reduced by 16.30%, 9.30% and 6.78%, respectively, when compared to CK, TSi, and JSi. Simultaneously, the liquid-phase-Cd concentration was appreciably suppressed by TJSi throughout the rice lifecycle, while TSi mainly abated Cd dissociation during the vegetative period, and JSi attenuated it during the grain-filling stage. The mobility factor of Cd treated with TJSi was the lowest, which was significantly lower than that of TSi (9.30%) and JSi (6.78%), respectively. Similarly, the oral exposure risk of TJSi was reduced by 4.43% and 32.53%; and the food-chain exposure risk of TJSi was decreased by 13.03% and 42.78%. Additionally, TJSi was the most effective in promoting enzyme activities and nutrient content in rhizosphere soil. Overall, TJSi is more positive and sustainable than TSi and JSi in reconstructing Cd-contaminated rhizosphere environments and abating the environmental risks of Cd. Agronomic practices in Cd-contaminated paddy soils can be informed by applying Si-fertilizer separately before transplanting and at jointing stage to achieve soil welfare and food security.
Collapse
Affiliation(s)
- Bogui Pan
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, 510642, China; Key Laboratory of Tropical Agricultural Environment in South China, Ministry of Agriculture and Rural Affairs, Guangzhou, 510642, China.
| | - Wei Wang
- College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Bingquan Liu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, 510642, China; Key Laboratory of Tropical Agricultural Environment in South China, Ministry of Agriculture and Rural Affairs, Guangzhou, 510642, China
| | - Kunzheng Cai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, 510642, China; Key Laboratory of Tropical Agricultural Environment in South China, Ministry of Agriculture and Rural Affairs, Guangzhou, 510642, China
| | - Jihui Tian
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, 510642, China; Key Laboratory of Tropical Agricultural Environment in South China, Ministry of Agriculture and Rural Affairs, Guangzhou, 510642, China
| | - Yixia Cai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou, 510642, China; Key Laboratory of Tropical Agricultural Environment in South China, Ministry of Agriculture and Rural Affairs, Guangzhou, 510642, China.
| |
Collapse
|
10
|
Lu H, Qin S, Zhao J, Pan P, Wang F, Tang S, Chen L, Akhtar K, He B. Silicon inhibits the upward transport of Cd in the first internode of different rice varieties in a Cd stressed farm land. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131860. [PMID: 37343406 DOI: 10.1016/j.jhazmat.2023.131860] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/04/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023]
Abstract
Silicon spraying on leaves can reduce the accumulation of cadmium (Cd) in rice grain. However, it has been found that not all rice varieties decrease in Cd content after silicon (Si) application. A field study was conducted to check the performance of Si on the accumulation and transport of Cd in four rice varieties. TY390 and YXY2, having 51.5%- 60.6% Cd content of grain was inhibited by foliar Si, were classified as CRS varieties; BXY9978 and YXYLS, having Cd content of grain is nonresponsive with Si, were classified as CNS varieties. The Cd contents were mainly accumulated in stem, especially in the first stem node. While foliar Si reported no changes in the Cd content of first node in four different rice varieties. Comparing the correlation between Si and Cd contents in the above part of the first internode of CRS and CNS, as well as the relative expression of Cd transport genes in the first internode suggested that first internode was the key site to effect Cd transport through Si application, and OsZIP7 is a key Cd transporter protein responsive to Si, leading to different response of Cd transport and accmulation between the CRS and the CNS varieties of rice.
Collapse
Affiliation(s)
- Huaming Lu
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China
| | - Shutao Qin
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China; Guangxi Gefeng Environmental Protection Technology Co., Ltd., Guangxi Zhuang Autonomous Region, Nanning 530004, PR China
| | - Junyang Zhao
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China; State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, PR China
| | - Peng Pan
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China; Green Food Office of Jilin Province, Changchun, Jilin Province 130033, PR China
| | - Fenglin Wang
- Guangxi Nanning Zhuopu Biological Environmental Protection Technology Co., Ltd. Guangxi Zhuang Autonomous Region, Nanning 530004, PR China
| | - Shide Tang
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China
| | - Lihong Chen
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China
| | - Kashif Akhtar
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China; State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, PR China
| | - Bing He
- Guangxi Key Laboratory of Argo-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, PR China.
| |
Collapse
|
11
|
Liu S, Ji X, Chen Z, Xie Y, Ji S, Wang X, Pan S. Silicon facilitated the physical barrier and adsorption of cadmium of iron plaque by changing the biochemical composition to reduce cadmium absorption of rice roots. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 256:114879. [PMID: 37037106 DOI: 10.1016/j.ecoenv.2023.114879] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/13/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Silicon effectively inhibits cadmium (Cd) uptake in rice, iron plaque on root surface was the primary link and first interface of Cd entering into rice root. To elucidate the mechanism of iron plaque under silicon treatment on root Cd uptake, the morphological characteristics of iron plaque, mechanisms of Cd adsorption of iron plaque and effect of iron plaque on Cd uptake by rice roots of Yuzhenxiang (YZX) and Xiangwanxian (XWX) rice varieties were studied by employing energy spectrum analysis technique, non-invasive micro-test technique, and isothermal-kinetic adsorption method. Scanning electron microscopy-X-ray energy dispersive (SEM-EDX) analysis showed that denser crystal structure of iron plaque was observed at Si treatment, silicon promoted the thickening of iron plaque and strengthened the isolation of iron plaque to Cd, which reduced the Cd content of white roots of YZX and XWX varieties by 30.2% and 20.9% respectively. However, the blocking effect of iron plaque on Cd was weakened under silicon treatment with iron plaque removed, Cd content in iron plaque of YZX and XWX cultivars was significantly decreased by 36.3% and 18.4%, Cd concentrations in white root and shoot was significantly increased, and the influxes of Cd2+ at elongation and maturation zone of root were increased in multiples. The results of adsorption test showed that the adsorption process of iron plaque was mainly a monolayer adsorption completed by boundary diffusion. The X-ray photoelectron spectroscopy (XPS) results demonstrated that silicon changed the biochemical composition of iron plaque and increased the density of the carbon-oxygen bound groups on iron plaque, which is the most likely reasons for the higher affinity of Cd adsorption ability of iron plaque observed in the silicon treated iron plaque. This study suggested the silicon-facilitated iron plaque have played critical effects in controlling the Cd accumulation in rice roots by changing the morphology and chemical composition of iron plaque.
Collapse
Affiliation(s)
- Saihua Liu
- Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution, Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Xionghui Ji
- Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution, Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Zhiliang Chen
- South China Institute of Environmental Science, MEE, Guangzhou 510700, China
| | - Yunhe Xie
- Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution, Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Shengying Ji
- Hunan Vegetable Research Institute, Changsha 410125, China
| | - Xin Wang
- School of Geographical Sciences, Hunan Normal University, Changsha 410081, China
| | - Shufang Pan
- Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution, Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha 410125, China.
| |
Collapse
|
12
|
Cui H, Tang S, Huang S, Lei L, Jiang Z, Li L, Wei S. Simultaneous mitigation of arsenic and cadmium accumulation in rice grains by foliar inhibitor with ZIF-8@Ge-132. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 860:160307. [PMID: 36403824 DOI: 10.1016/j.scitotenv.2022.160307] [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: 08/22/2022] [Revised: 11/09/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Simultaneous mitigation of Arsenic (As) and Cadmium (Cd) in rice grains is hardly achieved with conventional soil treatments due to their opposite chemical behaviors in paddy soils. This study evaluates the effectiveness of a novel foliar inhibitor with germanium (Ge) -modified zeolitic imidazolate framework (ZIF-8@Ge-132) in cooperative mitigation of As and Cd in rice grains in a As and Cd co-contaminated paddy field, and the effecting mechanisms are elucidated by a series of advanced techniques. The results showed that the grains inorganic As and Cd was remarkably decreased by 45 % and 66 % by the foliar spay of ZIF-8@Ge-132, respectively. ZIF-8@Ge-132 also reduced the As and Cd contents in rice tissues, except for Cd in leaves, where Cd content increased by 148 %. The image-based measurement of plant phenotypic traits and the elements of image analysis using Laser Ablation-ICP-MS (LA-ICP-MS) and Laser Scanning Confocal Microscopy (LSCM) revealed that the possible mechanisms for the reduction of As and Cd in rice grains were as follows: (i) the thickening of the xylem in roots significantly retarded As and Cd absorption by rice plants. (ii) co-accumulation of Ge and Cd in the leaf vascular system likely contributed to the high Cd retention in rice leaves. (iii) antagonistic effects of Zn suppressed the uptake and transport of As in roots/leaves, resulting a lower As accumulation in rice grains.
Collapse
Affiliation(s)
- Hao Cui
- College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing 400715, PR China; Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation, Jiangxi University of Science and Technology, Ganzhou 341000, PR China
| | - Shuting Tang
- College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing 400715, PR China
| | - Shiqi Huang
- College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing 400715, PR China
| | - Lidan Lei
- Chongqing Key Laboratory of Karst Environment, School of Geographical Sciences, Southwest University, Chongqing 400715, PR China
| | - Zhenmao Jiang
- College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing 400715, PR China
| | - Lei Li
- College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing 400715, PR China
| | - Shiqiang Wei
- College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|