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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] [MESH Headings] [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.
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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.
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Yang L, Kang Y, Li N, Wang Y, Sun H, Ao T, Chen L, Chen W. Safe utilization evaluation of two typical traditional Chinese medicinal materials in Cd-contaminated soil based on the analysis of Cd transfer and AHP model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169741. [PMID: 38160833 DOI: 10.1016/j.scitotenv.2023.169741] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/24/2023] [Accepted: 12/26/2023] [Indexed: 01/03/2024]
Abstract
Due to the increasing scarcity of wild resources, most traditional Chinese medicinal materials (TCMMs) in the market are produced via artificial cultivation. The widespread pollution of cadmium (Cd) in soil limits the safe cultivation and use of TCMMs. This study investigated Cd accumulation, distribution, and the medicinal component content under simulated field conditions to clarify the differences in the Cd absorption, transfer and detoxification mechanisms of Polygonatum cyrtonema Hua and Bletilla striata, and provide the preliminary safe utilization conditions of TCMMs based on the analytic hierarchy process (AHP). The results showed that the Cd content of P. cyrtonema Hua was lower than the safety threshold under a high soil Cd concentration of 0.91 mg/kg (Cd-L), while B. striata was safe only at a low Cd concentration of 0.25 mg/kg (CK). Cd at 0.91 mg/kg induced hormesis affecting the net increase in biomass and medicinal component content for both TCMMs, while P. cyrtonema Hua showed better potential for safe utilization. Additionally, P. cyrtonema Hua had stronger resistance to Cd stress, exhibiting superior characteristics for synergistic absorption of Cd with mineral elements, transfer to nonmedical part and safer fixation forms in subcellular components. In contrast, B. striata showed insufficient Cd tolerance, and Cd was easily accumulated in organelles to inhibit plant growth. Our findings may attract more attention to the safe cultivation of TCMMs and provide insight into guidance for the safe utilization of slightly Cd-contaminated soil.
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Affiliation(s)
- Li Yang
- Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources, Ministry of Education, Sichuan Normal University, Chengdu 610068, China; College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Yuchen Kang
- Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, Chengdu 610207, China
| | - Na Li
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Yuhao Wang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Hui Sun
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Tianqi Ao
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
| | - Li Chen
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
| | - Wenqing Chen
- Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, Chengdu 610207, China; College of Architecture and Environment, Sichuan University, Chengdu 610065, China; College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China.
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3
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Yang X, Wang D, Tao Y, Shen M, Ma C, Cai C, Song L, Yin B, Zhu C. Does elevated CO 2 enhance the arsenic uptake by rice? Yes or maybe: Evidences from FACE experiments. CHEMOSPHERE 2023; 327:138543. [PMID: 36996921 DOI: 10.1016/j.chemosphere.2023.138543] [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: 11/15/2022] [Revised: 03/22/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
Elevated CO2 (eCO2) strongly affects rice yield and quality in arsenic (As) paddy soils. However, understanding of the As accumulation in rice under coupled stress of eCO2 and soil As is still limited while data are scarce. It greatly limits the prediction for future rice safety. This study investigated the As uptake by rice grown in different As paddy soils under two CO2 conditions (ambient and ambient +200 μmol mol-1) in the free-air CO2 enrichment (FACE) system. Results showed that eCO2 lowered soil Eh at the tillering stage and caused higher concentrations of dissolved As and Fe2+ in soil pore water. Compared with the control, the increased As transfer abilities in rice straws under eCO2 contributed to the higher As accumulation in rice grains, and their total As concentrations were increased by 10.3-31.2%. Besides, the increased amounts of iron plaque (IP) under eCO2 failed to effectively inhibit the As uptake by rice due to the difference in critical stage between As immobilized by IP (mainly in maturing stage) and uptake by rice roots (about 50% contribution before filling stage). Risk assessments suggest that eCO2 enhanced the human health risks of As intake from rice grains produced in low-As paddy soils (<30 mg kg-1). In order to alleviate the As threats to rice under eCO2, we consider that proper soil drainage before filling stage to improve soil Eh can serve as an effective way to reduce As uptake by rice. Pursuing appropriate rice varieties to reduce the As transfer ability may be the other positive strategy.
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Affiliation(s)
- Xiong Yang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dongming Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ye Tao
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Shen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuanqi Ma
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuang Cai
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Lian Song
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Bin Yin
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Chunwu Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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Zhou Y, Zou Z, Wang M, Wang Y, Li J, Qiu L, Cheng Y, Dai Z. Biochar and nano-ferric oxide synergistically alleviate cadmium toxicity of muskmelon. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:57945-57959. [PMID: 36971939 DOI: 10.1007/s11356-023-26369-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 03/06/2023] [Indexed: 05/10/2023]
Abstract
Cadmium is toxic to plants. The accumulation of cadmium in edible plants such as muskmelon may affect the safe production of crops and result in human health problem. Thus effective measures are urgently needed for soil remediation. This work aims to investigate the effects of nano-ferric oxide and biochar alone or mixture on muskmelon under cadmium stress. The results of growth and physiological indexes showed that compared with the application of cadmium alone, the composite treatment (biochar and nano-ferric oxide) decreased malondialdehyde content by 59.12% and ascorbate peroxidase activity increased by 276.6%. Their addition can increase the stress resistance of plants. The results of soil analysis and cadmium content determination in plants showed that the composite treatment was beneficial to reduce the cadmium content in various parts of muskmelon. In the presence of high concentration of cadmium, the Target Hazard Quotient value of peel and flesh of muskmelon in the composite treatment was less than 1, which means the edible risk was greatly reduced. Furthermore, the addition of composite treatment increased the content of effective components; the contents of polyphenols, flavonoids, and saponins in the flesh of the compound treatment were increased by 99.73%, 143.07%, and 18.78% compared with the cadmium treatment. The results provide a technical reference for the further application of biochar combined with nano-ferric oxide in the field of soil heavy metal remediation, and provide a theoretical basis for further research on reducing the toxicity of cadmium to plants and improving the edible quality of crops.
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Affiliation(s)
- Ying Zhou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Zhengkang Zou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Mengfei Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Yunqiang Wang
- Institute of Economic Crops, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
- Vegetable Germplasm Innovation and Genetic Improvement Key Laboratory of Hubei Province, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
| | - Junli Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China.
| | - Lingzhi Qiu
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Yuxuan Cheng
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Zhaoyi Dai
- Institute of Economic Crops, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
- Vegetable Germplasm Innovation and Genetic Improvement Key Laboratory of Hubei Province, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
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5
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The role of hydroponic microbial fuel cell in the reduction of methane emission from rice plants. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
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6
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Zhang Z, Lu Y, Li H, Gao Y, Yang Z. The role of nickel in cadmium accumulation in rice. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 859:160421. [PMID: 36423846 DOI: 10.1016/j.scitotenv.2022.160421] [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: 08/09/2022] [Revised: 11/05/2022] [Accepted: 11/18/2022] [Indexed: 06/16/2023]
Abstract
Rice is one of the world's staple foods. Cadmium (Cd) levels in paddy soil are still increasing, and "Cd-contaminated rice" is a frequent occurrence, posing a serious threat to human health. Therefore, Cd contamination in rice is a key issue in agricultural production that needs to be addressed urgently. The Cd accumulation in rice is closely related to other elements. In this study, the impact of nickel (Ni) on the uptake and accumulation of Cd in rice was revealed, and the mechanism was discussed. Statistical analysis of field data showed that Cd concentration in rice grains decreased exponentially with increasing Ni concentration in paddy soils, which was verified by the hydroponic experiments. Under 5 μmol/L Cd exposure conditions, the addition of Ni (100 μmol/L) reduced the Cd contents in roots, stems, and leaves by 81.6 %, 60.6 %, and 65.9 %, respectively. With the presence of Ni, the amount of iron plaque decreased, and the Cd content in the iron plaque was reduced due to the competition between Ni and Cd for adsorption sites. In addition, the migration of Cd from stems to leaves was reduced. At the same time, the distribution of Cd in the cell was altered, and the concentration of Cd in the root cell walls increased with increasing Ni addition under 5 μmol/L Cd exposure. These findings highlight the critical role of Ni in inhibiting Cd accumulation in rice, and provide important information for understanding the effects of coexisting elements in Cd-contaminated soils on Cd accumulation in crops.
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Affiliation(s)
- Zhaoxue Zhang
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation, Jiangxi University of Science and Technology, Ganzhou 341000, China; Analysis and Testing Center, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Yi Lu
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Haipu Li
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha 410083, China.
| | - Ya Gao
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Zhaoguang Yang
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha 410083, China.
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7
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Yang X, Wang D, Tao Y, Shen M, Wei W, Cai C, Ding C, Li J, Song L, Yin B, Zhu C. Effects of elevated CO 2 on the Cd uptake by rice in Cd-contaminated paddy soils. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130140. [PMID: 36241499 DOI: 10.1016/j.jhazmat.2022.130140] [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: 07/25/2022] [Revised: 09/29/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
The rising atmospheric CO2 is a major driver for climate change, directly affects rice production. Cadmium (Cd) in paddy soils also serves as a persistent concern. Currently, few studies consider the rice response to coupled stresses of elevated CO2 (eCO2) and soil Cd. Experimental evidence understanding the effects and mechanisms of eCO2 on Cd uptake by rice is lacking yet. In a free-air CO2 enrichment (FACE) system, a 3-year pot experiment was conducted to explore the Cd uptake by rice under two CO2 conditions (ambient and ambient + 200 µmol·mol-1) using combinations of in-situ Cd-contaminated soils and associated rice varieties. Results showed that more low-crystalline Fe oxides (Feh) in iron plaque (IP) were deposited on root surface with the increased dissolved Fe2+ due to lower soil redox status under eCO2. The Cd accumulation in rice was hindered due to more Cd associated with Feh (Feh-Cd) rather than uptake by roots. Taken together, the relative effects of eCO2 on Cd uptake by rice were consistent across years under different Cd-contaminated soils. Our findings will help to better understand the Cd uptake by rice under future climate conditions, and thus push the development of climate-crop-soil models and accurate prediction for food security.
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Affiliation(s)
- Xiong Yang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100010, China.
| | - Dongming Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100010, China
| | - Ye Tao
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100010, China
| | - Min Shen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100010, China
| | - Wei Wei
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100010, China
| | - Chuang Cai
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Changfeng Ding
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jiuyu Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Lian Song
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Bin Yin
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Chunwu Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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Yao Q, Li W, Liu Y, Cheng Y, Xiao X, Long D, Zeng J, Wu D, Sha L, Fan X, Kang H, Zhang H, Zhou Y, Wang Y. FeCl 3 and Fe 2(SO 4) 3 differentially reduce Cd uptake and accumulation in Polish wheat (Triticum polonicum L.) seedlings by exporting Cd from roots and limiting Cd binding in the root cell walls. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120762. [PMID: 36471548 DOI: 10.1016/j.envpol.2022.120762] [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: 08/02/2022] [Revised: 11/05/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Wheat grown in cadmium (Cd)-contaminated soils easily accumulates more Cd in edible parts than the Chinese safety limit (0.1 mg/kg). FeCl3 and Fe2(SO4)3 have been used to extract Cd from Cd-contaminated soils. Thus, we hypothesized that FeCl3 and Fe2(SO4)3, used as iron (Fe) fertilizers, can reduce Cd uptake and accumulation in wheat. Here, a hydroponic experiment was performed with three FeCl3 and Fe2(SO4)3 concentrations under 80 μM CdCl2 stress on dwarf Polish wheat (Triticum polonicum L., 2n = 4x = 28, AABB) seedlings. Compared with Fe deficiency, FeCl3 and Fe2(SO4)3 additions competitively reduced Cd concentrations. The reductions were not associated with changes in dry weight and root morphological parameters. FeCl3 and Fe2(SO4)3 additions reduced Cd concentrations in the following order from smallest to largest reduction: 25 μM Fe2(SO4)3 < 200 μM FeCl3 < 50 μM FeCl3 < 100 μM Fe2(SO4)3. Investigation of subcellular distributions showed that the four Fe fertilizers differentially reduced Cd binding in the root cell walls and enhanced root sucrose and trehalose. Cd chemical form analysis revealed that Fe fertilizer addition also differentially reduced root FE, FW, and FNaCl. Transcriptomic analysis revealed that addition of FeCl3 and Fe2(SO4)3 differentially up-regulated several genes that hydrolyze cell wall polysaccharides and metal transporter genes for Cd uptake (IRT1 and CAX19) and export (ZIP1, ABCG11, ABCG14, ABCG28, ABCG37, ABCG44, and ABCG48) reducing Cd uptake and accumulation. Our results demonstrated that FeCl3 and Fe2(SO4)3 can reduce Cd accumulation in wheat, and 50 μM FeCl3 is the most effective treatment.
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Affiliation(s)
- Qin Yao
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Weiping Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Ying Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Yiran Cheng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Xue Xiao
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Dan Long
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Jian Zeng
- College of Resources, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Dandan Wu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Lina Sha
- College of Grassland Science and Technology, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Xing Fan
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Houyang Kang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Haiqin Zhang
- College of Grassland Science and Technology, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Yonghong Zhou
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Yi Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China.
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Bhardwaj AK, Chejara S, Malik K, Kumar R, Kumar A, Yadav RK. Agronomic biofortification of food crops: An emerging opportunity for global food and nutritional security. FRONTIERS IN PLANT SCIENCE 2022; 13:1055278. [PMID: 36570883 PMCID: PMC9780467 DOI: 10.3389/fpls.2022.1055278] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/17/2022] [Indexed: 05/30/2023]
Abstract
Fortification of food with mineral micronutrients and micronutrient supplementation occupied the center stage during the two-year-long Corona Pandemic, highlighting the urgent need to focus on micronutrition. Focus has also been intensified on the biofortification (natural assimilation) of mineral micronutrients into food crops using various techniques like agronomic, genetic, or transgenic. Agronomic biofortification is a time-tested method and has been found useful in the fortification of several nutrients in several crops, yet the nutrient use and uptake efficiency of crops has been noted to vary due to different growing conditions like soil type, crop management, fertilizer type, etc. Agronomic biofortification can be an important tool in achieving nutritional security and its importance has recently increased because of climate change related issues, and pandemics such as COVID-19. The introduction of high specialty fertilizers like nano-fertilizers, chelated fertilizers, and water-soluble fertilizers that have high nutrient uptake efficiency and better nutrient translocation to the consumable parts of a crop plant has further improved the effectiveness of agronomic biofortification. Several new agronomic biofortification techniques like nutripriming, foliar application, soilless activation, and mechanized application techniques have further increased the relevance of agronomic biofortification. These new technological advances, along with an increased realization of mineral micronutrient nutrition have reinforced the relevance of agronomic biofortification for global food and nutritional security. The review highlights the advances made in the field of agronomic biofortification via the improved new fertilizer forms, and the emerging techniques that achieve better micronutrient use efficiency of crop plants.
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Xiao B, Huang J, Guo J, Lu X, Zhu L, Wang J, Zhou C. Flooding-induced rhizosphere Clostridium assemblage prevents root-to-shoot cadmium translocation in rice by promoting the formation of root apoplastic barriers. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129619. [PMID: 35868081 DOI: 10.1016/j.jhazmat.2022.129619] [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: 04/07/2022] [Revised: 07/06/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
Water managements are the most effective agricultural practices for restraining cadmium (Cd) uptake and translocation in rice, which closely correlated with rhizosphere assembly of beneficial microbiome. However, the role of the assemblage of specific microbiota in controlling root-to-shoot Cd translocation in rice remains scarcely clear. The aim of this study was to ascertain how water managements shaped rhizosphere microbiome and mediated root-to-shoot Cd translocation. To disentangle the acting mechanisms of water managements, we performed an experiment monitoring Cd uptake and transport in rice and changes in soil microbial communities in response to continuously flooding and moistening irrigation. Continuously flooding changed rhizosphere microbial communities, leading to the increased abundance of anaerobic bacteria such as Clostridium populations. Weighted gene co-expression network analysis (WGCNA) showed that a dominant OTU163, corresponding to Clostridium sp. CSP1, exhibited a strong negative correlation with root-to-shoot Cd translocation. An integrated analysis of transcriptome and metabolome further indicated that the Clostridium-secreted butyric acid was involved in the regulation of phenylpropanoid pathway in rice roots. The formation of endodermal suberized barriers and lignified xylems was remarkably enhanced in the Clostridium-treated roots, which led to more Cd retained in root cell wall and less Cd in the xylem sap. Collectively, our results indicate that the development of root apoplastic barriers can be orchestrated by beneficial Clostridium strains that are assembled by host plants grown under flooding regime, thereby inhibiting root-to-shoot Cd translocation.
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Affiliation(s)
- Bing Xiao
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Jiameng Huang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Jiansheng Guo
- School of Medicine, Zhejiang University, Hangzhou 310058, China; School of Life Science and Technology, Tongji University, Shanghai 200092, China
| | - Xiaoming Lu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Lin Zhu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China; School of Life Science and Technology, Tongji University, Shanghai 200092, China.
| | - Jianfei Wang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Cheng Zhou
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China; Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China.
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11
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Zhang Q, Huang D, Xu C, Zhu H, Feng RW, Zhu Q. Fe fortification limits rice Cd accumulation by promoting root cell wall chelation and reducing the mobility of Cd in xylem. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 240:113700. [PMID: 35636238 DOI: 10.1016/j.ecoenv.2022.113700] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/20/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
Fe biofortification and Cd mitigation in rice is essential for human health, thus the effects of fertilization with Fe on Cd uptake and distribution in rice need to be comprehensively studied. In this study, we investigated the roles of root iron (Fe)/manganese (Mn) plaques, root cell wall, organic acid, and expressions of Cd-transport related genes in restricting Cd uptake and translocation. The rice plants were exposed to 1 μM CdCl2 with or without the addition of three doses of Fe at 5, 50, and 500 μM EDTA-Na2Fe. The results showed that increasing supply of Fe remarkably reduced Cd accumulation in the shoots, mainly because of inhibited translocation of Cd from roots to shoots. As compared to 5 μM Fe treatment, 500 μM Fe significantly increased the ionic soluble pectin (ISP) content and decreased citric acid (CA) in the roots, thereby providing more Cd-binding sites in the cell wall of roots and reducing the mobility of Cd in xylem. Plant Fe status-mediated CA act as the main chelator for Cd mobilization, rather than through decreasing the pH. However, the plants supplied with low Fe or excess Fe facilitated the uptake of Cd in rice roots, as low Fe up-regulated the expression of Cd-transport related genes and excess Fe enhanced Cd enrichment on the root by iron plaque. Importantly, soil fertilization with Fe strongly reduced Cd accumulation in rice grain. Thus, optimizing the soil environmental Fe could effectively reduce Cd accumulation in the shoots by immobilizing Cd in the roots.
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Affiliation(s)
- Quan Zhang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - DaoYou Huang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Chao Xu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - HanHua Zhu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Ren-Wei Feng
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - QiHong Zhu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
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12
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Li L, Mao D, Sun L, Wang R, Tan L, Zhu Y, Huang H, Peng C, Zhao Y, Wang J, Huang D, Chen C. CF1 reduces grain-cadmium levels in rice (Oryza sativa). THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 110:1305-1318. [PMID: 35293046 DOI: 10.1111/tpj.15736] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/06/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
Rice (Oryza sativa) is a leading source of dietary cadmium (Cd), a non-essential heavy metal that poses a serious threat to human health. There are significant variations in grain-Cd levels in natural rice populations, which make the breeding of low-Cd rice a cost-effective way to mitigate grain-Cd accumulation. However, the genetic factors that regulate grain-Cd accumulation have yet to be fully established, thereby hindering the development of low-Cd varieties. Here, we reported a low-Cd quantitative trait locus, CF1, that has the potential to reduce Cd accumulation in rice grains. CF1 is allelic to the metal transporter OsYSL2, which transports Fe from the roots to the shoots. However, it is incapable of binding Cd, and thus, reduces grain-Cd levels indirectly rather than directly in the form of upward delivery. Further analysis showed that high expression levels of CF1 improve Fe nutrition in the shoots, subsequently inhibiting Cd uptake by systemically inhibiting expression of the main Cd uptake gene OsNramp5 in the roots. Compared with the CF1 allele from '02428' (CF102428 ), higher expression levels of CF1 from 'TQ' (CF1TQ ) increased the Fe contents and decreased Cd levels in rice grains. In natural rice populations, CF1TQ was found to be a minor allele, while CF102428 is present in most japonica rice, suggesting that CF1TQ could be widely integrated into the japonica rice genome to generate low-Cd varieties. Overall, these results broaden our mechanistic understanding of the natural variation in grain-Cd accumulation, supporting marker-assisted selection of low-Cd rice.
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Affiliation(s)
- Lanying Li
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Donghai Mao
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Liang Sun
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Ruigang Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
| | - Longtao Tan
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Yuxing Zhu
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Han Huang
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Can Peng
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Yaping Zhao
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
| | - Jiurong Wang
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Daoyou Huang
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
| | - Caiyan Chen
- Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Innovation Academy for Seed Design, Chinese Academy of Sciences, Changsha, 410125, China
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13
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Li X, Teng L, Fu T, He T, Wu P. Comparing the effects of calcium and magnesium ions on accumulation and translocation of cadmium in rice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:41628-41639. [PMID: 35094265 DOI: 10.1007/s11356-021-17923-3] [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: 06/08/2021] [Accepted: 11/30/2021] [Indexed: 06/14/2023]
Abstract
Rice (Oryza sativa L.) is one of China's most important food crops, and it is considered the primary source of human exposure to cadmium (Cd) pollution. Adding calcium (Ca) and magnesium (Mg) to the plant nutrient solutions reduces the accumulation of Cd in the rice, but under the same condition, which one has the better effect remains unclear. Thus, hydroponic experiments were performed to compare the effects of Ca and Mg ions with concentration gradients (0.10, 0.25, and 0.50 g/L, respectively) on the absorption, distribution, and translocation of Cd in rice. The Cd contents of roots, stems, leaves, panicles, husks, and grains in different growth stages were determined. The results revealed that the supplementation of both Ca and Mg influenced the Cd accumulation and translocation in rice tissues. The Cd concentrations of different patterns were in the following order: roots > stems > leaves ≈ panicles ≈ husks > grains. Both of Ca and Mg had an apparent antagonism with Cd in different parts of the rice plant, and the antagonism was more obvious in the high Cd stress treatments. With the addition of 0.1 g/L Ca2+ and Mg2+ ions, the grain Cd contents increased, while the application of 0.25 and 0.5 g/L Ca2+ and Mg2+ ions reduced grains Cd by 19.08-38.99%, with the average value of 26.75%. Under the same concentrations, the grain Cd content of Ca treatments was lower than that of Mg treatments by 8.74%. In the Ca (Mg)-deficient and Ca (Mg)-sufficient conditions, the husks and panicles accumulated Cd to hinder Cd translocation, respectively. Altogether, the results of this study indicated that Ca had a greater effect for decreasing rice Cd accumulation and translocation than Mg, and the panicle and husk were the important parts for reducing Cd translocation to grain, and these might be a focal point for the future research. It was possible to plant and grow rice in Cd-polluted soil and that the accumulation and translocation of Cd in rice plants could be reduced by optimizing soil nutrient elements.
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Affiliation(s)
- Xiangying Li
- College of Resource And Environmental Engineering, Guizhou University, Guiyang, 550025, China
- Institute of New Rural Development, Guizhou University, Guiyang, 550025, China
| | - Lang Teng
- College of Agriculture, Guizhou University, Guiyang, 550025, China
- Tongren Agriculture and Rural Affairs Bureau, Tongren, 554300, China
| | - Tianling Fu
- College of Resource And Environmental Engineering, Guizhou University, Guiyang, 550025, China
- Institute of New Rural Development, Guizhou University, Guiyang, 550025, China
| | - Tengbing He
- Institute of New Rural Development, Guizhou University, Guiyang, 550025, China.
- College of Agriculture, Guizhou University, Guiyang, 550025, China.
| | - Pan Wu
- College of Resource And Environmental Engineering, Guizhou University, Guiyang, 550025, China.
- Key Laboratory of Karst Georesources and Environmental, Ministry of Education, Guizhou University, Guiyang, 550025, China.
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14
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Phytoremediation of Toxic Metals: A Sustainable Green Solution for Clean Environment. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112110348] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Contamination of aquatic ecosystems by various sources has become a major worry all over the world. Pollutants can enter the human body through the food chain from aquatic and soil habitats. These pollutants can cause various chronic diseases in humans and mortality if they collect in the body over an extended period. Although the phytoremediation technique cannot completely remove harmful materials, it is an environmentally benign, cost-effective, and natural process that has no negative effects on the environment. The main types of phytoremediation, their mechanisms, and strategies to raise the remediation rate and the use of genetically altered plants, phytoremediation plant prospects, economics, and usable plants are reviewed in this review. Several factors influence the phytoremediation process, including types of contaminants, pollutant characteristics, and plant species selection, climate considerations, flooding and aging, the effect of salt, soil parameters, and redox potential. Phytoremediation’s environmental and economic efficiency, use, and relevance are depicted in our work. Multiple recent breakthroughs in phytoremediation technologies are also mentioned in this review.
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15
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Zhang X, Zhang P, Hu Y, Liu Y, Feng S, Guo D, Dang X. Immobilization of cadmium in soil and improved iron concentration and grain yields of maize (Zea mays L.) by chelated iron amendments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:53161-53170. [PMID: 34024003 DOI: 10.1007/s11356-021-14523-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 05/17/2021] [Indexed: 06/12/2023]
Abstract
With the development of industrial and agricultural production, the cadmium (Cd) pollution in farmland soil is increasing which threatens the quality and safety of agricultural products in China. The purpose of this research is to explore the potential of chelated iron amendments for reducing the bioavailability of Cd to maize plants. The experiment of maize cultivation was carried out in pots. Maize was cultivated in brown soil collected from a northeast region in China and then artificially contaminated with Cd with an average concentration of 10 mg/kg. The potential of ethylenediamine tetra acetic acid ferric-sodium (EDTANa2Fe) and ethylenediamine-N, N'-bis(2-hydroxyphenylacetic acid) ferric-sodium (EDDHAFe) as amendments for Cd immobilization in soils were tested. Effects of different concentrations (0.013, 0.026, 0.053, and 0.08 g/kg) of EDTANa2Fe and EDDHAFe (calculated by iron) on the growth of maize and the Cd and Fe uptake in maize were evaluated. Principle component analysis (PCA) was performed to further analyze the overall effects of iron amendments on Cd accumulation in plants. The results showed that EDTANa2Fe and EDDHAFe at dose of 53 mg/kg reduced available Cd in soil to the value of 5.19 and 4.59 mg/kg, respectively. EDTANa2Fe of 80 mg/kg and EDDHAFe of 26, 53, and 80 mg/kg increased Fe concentration in grains by 34.86%, 36.88%, 41.46%, and 44.05%, respectively, while reduced the Cd content in grains by 39.82%, 42.67%, 48.41%, and 35.08%, respectively. Fe concentration in grains showed a significant negative correlation with the concentration of Cd (P < 0.05). EDTANa2Fe of 53 mg/kg treatment increased the maize yield by 30.45% which was higher than in all other treatments. EDDHAFe treatments of 26 and 53 mg/kg increased the total root length by 39.72% and 48.68%, respectively, and increased the total root surface area by 19.95% and 22.98%, respectively. In general, the application of EDTANa2Fe and EDDHAFe at dose of 53 mg/kg can effectively immobilize Cd in soil and reduce Cd accumulation in maize and improve Fe uptake in grains.
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Affiliation(s)
- Xing Zhang
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China
| | - Peng Zhang
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK
| | - Yanmei Hu
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China
| | - Yuqing Liu
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China
| | - Shanshan Feng
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China
| | - Dawei Guo
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China
| | - Xiuli Dang
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang, 110866, People's Republic of China.
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16
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Zhang JY, Zhou H, Zeng P, Wang SL, Yang WJ, Huang F, Huo Y, Yu SN, Gu JF, Liao BH. Nano-Fe 3O 4-modified biochar promotes the formation of iron plaque and cadmium immobilization in rice root. CHEMOSPHERE 2021; 276:130212. [PMID: 33740654 DOI: 10.1016/j.chemosphere.2021.130212] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/21/2021] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
Rice as a paddy field crops, iron-containing materials application could induce its iron plaque formation, thereby affecting cadmium (Cd) transportation in the rhizosphere and its uptake in root. In this study, a hydroponic experiment was conducted to investigate the effects of three exogenous iron materials, namely nano-Fe3O4-modified biochar (BC-Fe), chelated iron (EDTA-Fe), and ferrous sulfate (FeSO4), on the iron plaque formation on the surface of rice root, and to investigate the effects of formed iron plaque on the absorption, migration, and transportation of Cd and Fe in rice plant. The results showed that yellow-brown and brown iron plaque was formed on surface cells of the Fe-treated rice root, and some black particles were embedded in the iron plaque formed by BC-Fe. The proportion of crystallized iron plaque (31.8%-35.9%) formed by BC-Fe was much higher than that formed by EDTA-Fe and FeSO4. The Cd concentrations in the crystallized iron plaque formed by BC-Fe were 7.64-13.0 mg·kg-1, and increased with the increasing of Fe concentrations in the plaque. The Cd translocation factor from root to stem (TFr-s) and the Cd translocation factor from stem to leaf (TFs-l) with BC-Fe treatment decreased by 84.7% and 80.0%, respectively. The results demonstrated that application BC-Fe promoted the formation of iron plaque and enhanced the sequestration of Cd and Fe in roots, thus reduced the transportation and accumulation of Cd in aerial rice tissues.
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Affiliation(s)
- Jing-Yi Zhang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Hang Zhou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Peng Zeng
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Shi-Long Wang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Wen-Jun Yang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Fang Huang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Yang Huo
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Shu-Ning Yu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Jiao-Feng Gu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Bo-Han Liao
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
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17
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Han Y, Ling Q, Dong F, de Dios VR, Li Z, Zhang W, Huo T, Chen Y, Hu X, Wang X, Li D, Zhou L, Yang G, Zhan X. Iron and copper micronutrients influences cadmium accumulation in rice grains by altering its transport and allocation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 777:146118. [PMID: 33684766 DOI: 10.1016/j.scitotenv.2021.146118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) contamination in rice paddy fields constitutes a serious health issue in some parts of China. Here we study the potential for remediation of Cd contaminated alkaline paddy soil with low iron (Fe) and high copper (Cu) background by altering the concentrations of Fe and Cu in the growing media, which has been only seldom considered. We assessed how these two micronutrients (Cu and Fe) affect the absorption and transport of Cd in rice. Adding Cu significantly increased rice biomass and grain yield by reducing root Cd influx and Cd upward transport which, consequently, lowered Cd concentrations in roots, culms and leaves. However, excessive Cu also promoted a relatively higher Cd allocation in grains, especially under Fe deficiency, likely because Cu significantly increased the proportion of bioavailable Cd in leaves. Contrastingly, Fe did not alleviate the toxic effects of Cd on rice growth and yield, but it significantly reduced Cd transfer towards grains, which might be attributed to a sharp decrease in the proportion of bioavailable Cd in leaves. Our results demonstrated that Cd remediation may be achieved through altering Fe and Cu inputs, such that Cd accumulation in rice grains is reduced.
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Affiliation(s)
- Ying Han
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Qin Ling
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Mianyang Boe Optoelectronics Technology Co., Ltd, Mianyang 621010, China
| | - Faqin Dong
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
| | - Víctor Resco de Dios
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Department of Crop and Forest Sciences and JRU CTFC-AGROTECNIO, Universitat de Lleida, Lleida, Spain
| | - Zhi Li
- Chengdu Defei Environmental Engineering Co., Ltd, Chengdu 610041, China
| | - Wei Zhang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Center of Analysis and Testing, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Tingting Huo
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Yun Chen
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Xinyang Hu
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Xuhui Wang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Dongkun Li
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Lei Zhou
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China
| | - Gang Yang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Xiaohong Zhan
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
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18
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Wang X, Deng S, Zhou Y, Long J, Ding D, Du H, Lei M, Chen C, Tie BQ. Application of different foliar iron fertilizers for enhancing the growth and antioxidant capacity of rice and minimizing cadmium accumulation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:7828-7839. [PMID: 33040291 DOI: 10.1007/s11356-020-11056-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 09/28/2020] [Indexed: 05/22/2023]
Abstract
Iron (Fe) fertilizer can reduce cadmium (Cd) uptake and toxicity in rice, but the underlying mechanisms of Cd mitigation by different fertilizers are poorly understood. Here, pot experiments in rice were conducted to characterize the effects of four types of foliar-applied Fe fertilizer (chelated ferrous Fe, ferric Fe, ionic ferrous Fe, and ferric Fe) at three doses (20, 50, and 100 mg L-1) on photosynthetic capacity, antioxidant ability, yield, and Cd accumulation in Cd-contaminated soil. The results showed that foliar Fe application increased the net photosynthesis rate by 19.3%, peroxidase (POD) by 18.2%, superoxide dismutase (SOD) by 26.9%, and catalase (CAT) by 19.6%, and led to a 7.2% increase in grain yield compared with the control. Moreover, foliar Fe application significantly reduced Cd accumulation by 15.9% in brown rice and decreased the translocation of Cd from roots to other plant tissues. Overall, application of moderate doses (50 mg L-1) of chelated ferrous Fe was the most effective method for reducing Cd uptake (decreasing the Cd concentration in brown rice by 29.0%) and toxicity in rice (decreasing malondialdehyde by 23.2% and increasing POD, SOD, and CAT by 54.4%, 51.6%, and 45.7%, respectively), which may stem from the fact that chelated ferrous Fe was a more stable and bioavailable source of Fe for rice. The Cd concentration in rice had negative relationship with Fe concentration, and the translocation of Cd from root to the other tissues was reduced by the higher Fe nutrition status in leaf, suggesting that a high Fe supply may decrease Cd content by inhibiting the expression of the Fe transport system. These results indicate that foliar application of chelated ferrous Fe provides a promising alternative approach for enhancing growth and controlling Cd accumulation in rice plants. Furthermore, these results advance our understanding of the associations between plant Fe nutrition status and Cd accumulation.
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Affiliation(s)
- Xinqi Wang
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Sihan Deng
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Yimin Zhou
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Jiumei Long
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
- College of Environment and Life Science, Hengyang Normal University, Hengyang, 421001, People's Republic of China
| | - Dan Ding
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - HuiHui Du
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Ming Lei
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China.
| | - Congying Chen
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Bai Qing Tie
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
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Hussain B, Li J, Ma Y, Tahir N, Ullah A. Effects of Fe and Mn cations on Cd uptake by rice plant in hydroponic culture experiment. PLoS One 2020; 15:e0243174. [PMID: 33301482 PMCID: PMC7728178 DOI: 10.1371/journal.pone.0243174] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/17/2020] [Indexed: 11/19/2022] Open
Abstract
Iron (Fe) and manganese (Mn) are nutritional components of rice, plays an important role in its physiological processes and can minimize absorption of cadmium (Cd) in rice. Fe, Mn, and Cd transporters such as CAL1, OsNRAMP5, OsNRAMP1, OsIRT1, OsHMA3, and OsNAAT1 regulate uptake of Cd in rice. However, the effect of exogenous application of Fe, and Mn on the accumulation of Cd and relative expression (RE) of these transporters in rice has not been investigated. Therefore, a hydroponic culture experiment was conducted to investigate the impact of Fe and Mn on Cd uptake and RE of these transporters in rice. The results showed that the Fe and Mn application significantly decreased Cd in the roots and shoots of rice. Whereas, Cd concentration in the rice significantly increased with increasing Cd concentration in the solution. The addition of manganese in the culture medium can reduce the cadmium content of rice roots by 11.9–82.3% and shoots by 11.6–85.0%, while the addition of iron in the culture medium can reduce the cadmium content of rice roots and shoots by 26–65% and 9–683% respectively. Meanwhile, application of sufficient doses of Fe and Cd in solution culture increased RE of CAL1, OsNRAMP5, OsNRAMP1, OsIRT1, and OsNAAT1 in roots, whereas expression level of OsHMA3 was decreased. Similarly, expression level of CAL1, OsNRAMP5, and OsNRAMP1 significantly increased in roots in high Cd and Mn deficient treatments. This may be concluded that the Cd increases expression of CAL1, OsNRAMP5, OsNRAMP1, OsIRT1, and OsNAAT1 but decreases OsHMA3 expression in rice roots, which resulted in increased Cd uptake in hydroponically grown rice.
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Affiliation(s)
- Babar Hussain
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jumei Li
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
- * E-mail:
| | - Yibing Ma
- Macao Environmental Research Institute, Macau University of Science and Technology, Macao, China
| | - Nazia Tahir
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Aman Ullah
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
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20
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Zhang X, Li X, Tang L, Peng Y, Qian M, Guo Y, Rui H, Zhang F, Hu Z, Chen Y, Xia Y, Shen Z. The root iron transporter 1 governs cadmium uptake in Vicia sativa roots. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122873. [PMID: 32768815 DOI: 10.1016/j.jhazmat.2020.122873] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
Cadmium is a non-essential element for plants and that inhibits plant growth and development. The Zhangye Mawan (ZM) variety of Vicia sativa is more sensitive to Cd toxicity than that Lanjian 3# (L3) variety, but the underlying mechanism is not fully understood. Here, we demonstrated that ZM showed higher Cd accumulation than L3 based on root Cd content and Cd fluorescence intensity in root protoplasts. VsRIT1, a member of the ZIP (ZRT/IRT-like protein) family, showed expression levels in ZM roots 8-fold higher than those in L3 roots under Cd exposure. VsRIT1 expression increased Cd transport and accumulation in Arabidopsis and yeast. These suggests that VsRIT1 participates in Cd uptake by V. sativa roots. Furthermore, ZM root tips have a higher capacity for transient Cd influx than L3 roots when exposed to Cd alone or Cd and iron (Fe) together, owing to the higher VsRIT1 expression in ZM. Our findings also imply that Cd may compete with Fe or/and zinc (Zn) for uptake via VsRIT1 in V. sativa or yeast.
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Affiliation(s)
- Xingxing Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Guangdong Engineering Research Center for Pesticide & Fertilizer, Guangdong Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute), Guangzhou, 510316, China
| | - Xin Li
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ling Tang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yizhe Peng
- College of Resources & Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Meng Qian
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yafang Guo
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Haiyun Rui
- Taizhou University, Taizhou, 225300, China
| | - Fenqin Zhang
- College of Agriculture and Biotechnology, Hexi University, Zhangye, 734000, China
| | - Zhubing Hu
- Center for Multi-Omics Research, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Yahua Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing, 210095, China
| | - Yan Xia
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing, 210095, China.
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing, 210095, China.
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21
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Liu H, Yang L, Li N, Zhou C, Feng H, Yang J, Han X. Cadmium toxicity reduction in rice (Oryza sativa L.) through iron addition during primary reaction of photosynthesis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 200:110746. [PMID: 32450439 DOI: 10.1016/j.ecoenv.2020.110746] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/30/2020] [Accepted: 05/03/2020] [Indexed: 05/22/2023]
Abstract
Cadmium (Cd) pollution is a worldwide concern due to its biotoxicity. Because Cd and Fe are closely associated during plant photosynthesis, this study aims at investigating the mechanism governing Cd toxicity during photosynthetic primary reaction in rice by adjusting Fe concentration. The results show that moderate Fe concentration (1.0 g kg-1) added to soil can increase the stomatal conductance (Gs) and SPAD value by stimulating the stomatal opening and chlorophyll synthesis. Moderate Fe concentration can also improve the maximum fluorescence (Fm) and the maximal photochemical efficiency (Fv/Fm) to keep the high reaction center activity and electronic transfer efficiency in photosystems I and II. Thus, moderate Fe can eliminate Cd-induced decrease in Gs, intercellular CO2 concentration (Ci) and net photosynthetic rate (Pn) as well as the disorder of antioxidative system under Cd concentration of 2.0 mg kg-1 in the soil. When its application is increased to 2.0 g kg-1, Fe can notably decrease Pn, and result in remarkable decrease in the biomass of shoots and grains. Decrease in Pn can be mainly attributed to high Fe concentration which can greatly destroy chloroplast structure and, meanwhile, inhibit the electron transfer between acceptor and donator in photosynthetic chain especially from quinone A (QA) to quinone B (QB). Unlike the situation under moderate Fe concentration, the high Fe application cannot mitigate the Cd-induced decrease in photosynthetic index. Our results indicate that the moderate Fe application is necessary to promote rice performance and production and, in the meantime, to inhibit Cd toxicity in the extensively polluted soils.
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Affiliation(s)
- Houjun Liu
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, China.
| | - Lei Yang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, China
| | - Na Li
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, China
| | - Chongjun Zhou
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, China
| | - Huan Feng
- Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ, 07043, USA
| | - Jinfeng Yang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, China.
| | - Xiaori Han
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, 110866, China.
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22
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Wang Z, Wang H, Xu C, Lv G, Luo Z, Zhu H, Wang S, Zhu Q, Huang D, Li B. Foliar Application of Zn-EDTA at Early Filling Stage to Increase Grain Zn and Fe, and Reduce Grain Cd, Pb and Grain Yield in Rice (Oryza sativa L.). BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 105:428-432. [PMID: 32740744 DOI: 10.1007/s00128-020-02949-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
The accumulation of Cd and Pb in rice grains poses a potential threat to human health, which is a subject of increasing concern across the globe. We examined the effect that foliar spraying of Zn-ethylenediaminetetraacetate (Zn-EDTA) (0.3% and 0.5% w/v) during the early-grain filling stage has on rice grain yield and Cd, Pb, Zn and Fe contents in rice tissues via a field experiment. The grain yield significantly decreased with the foliar application of 0.5% Zn-EDTA. In rice grain, foliar spraying of 0.5% Zn-EDTA significantly decreased the Cd and Pb contents, but increased the Zn and Fe contents. The main reasons for the decrease in the Cd and Pb content in grain were the inhibition of Cd and Pb by roots and the increased Fe content in grain via Zn-EDTA application. The foliar spraying of Zn-EDTA decreased the grain yield and Cd and Pb contents, while increased the Zn and Fe contents in grains.
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Affiliation(s)
- Zhongyuan Wang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hui Wang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Chao Xu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
| | - Guanghui Lv
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
| | - Zunchang Luo
- Soil and Fertilizer Institute of Hunan Province, Changsha, 410125, China
| | - Hanhua Zhu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
| | - Shuai Wang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
| | - Qihong Zhu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
| | - Daoyou Huang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
| | - Baizhong Li
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
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23
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Li S, Chen S, Wang M, Lei X, Zheng H, Sun X, Wang L, Han Y. Iron fractions responsible for the variation of Cd bioavailability in paddy soil under variable pe+pH conditions. CHEMOSPHERE 2020; 251:126355. [PMID: 32169702 DOI: 10.1016/j.chemosphere.2020.126355] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/13/2020] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
Iron (Fe) in soil is closely related to cadmium (Cd) uptake by rice plants, and soil pe + pH significantly influences Fe redox behavior. This study aimed to explore the influential mechanisms of varying pe + pH conditions on the transformation of iron oxides in the rhizosphere and the subsequent effect on Cd accumulation in rice plants. A two-month pot experiment was conducted to investigate the effect of soil pe + pH on the fractions of iron oxides and formation of iron plaque (IP), as well as the effect of these changes on Cd uptake by rice plants (Oryza sativa L.). Different irrigation strategies, 70% water holding capacity (DY), continuous flooding (FL), and alternate flooding/drying weekly (AWD), were used to achieve various soil pe + pH levels. The results showed that low pe + pH conditions (under the FL and AWD treatments) were more beneficial to the transformation of crystalline iron oxides into amorphous forms in rhizosphere soil and the precipitation of IP on rice roots. The increase of amorphous iron oxides resulted in the reduction of Cd availability in rhizosphere soil by immobilizing more Cd on Fe oxides. Moreover, Cd adsorbed on rice root surfaces reacted with IP, inhibiting Cd soil-to-root transport. The two mechanisms combinatively functioned at decreasing Cd concentration in rice shoots by 14.1-33.1% at low pe + pH conditions compared to that of the high pe + pH (DY treatment). These results indicate that lowering soil pe + pH effectively reduced Cd accumulation in rice plants, probably through the immobilization of amorphous Fe oxides on Cd and sequestration of iron-plaque on Cd.
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Affiliation(s)
- Shanshan Li
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
| | - Shibao Chen
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China.
| | - Meng Wang
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China.
| | - Xiaoqin Lei
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
| | - Han Zheng
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
| | - Xiaoyi Sun
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
| | - Lifu Wang
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
| | - Yun Han
- Key Laboratory of Plant Nutrition and Fertilizer, Agriculture and Rural Affairs / Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
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24
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Zhang JY, Zhou H, Gu JF, Huang F, Yang WJ, Wang SL, Yuan TY, Liao BH. Effects of nano-Fe 3O 4-modified biochar on iron plaque formation and Cd accumulation in rice (Oryza sativa L.). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:113970. [PMID: 32014742 DOI: 10.1016/j.envpol.2020.113970] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 12/19/2019] [Accepted: 01/10/2020] [Indexed: 06/10/2023]
Abstract
Nano-Fe3O4-modified biochar (BC-Fe) was prepared by the coprecipitation of nano-Fe3O4 on a rice husk biochar surface. The effects of BC-Fe on cadmium (Cd) bioavailability in soil and on Cd accumulation and translocation in rice (Oryza sativa L. cv. 'H You 518') were investigated in a pot experiment with 7 application rates (0.05-1.6%, w/w). BC-Fe increased the biomass of the rice plants except for the roots and affected the concentration and accumulation of Cd and Fe in the plants. The Cd concentrations of brown rice were significantly decreased by 48.9%, 35.6%, and 46.5% by the 0.05%, 0.2%, and 0.4% BC-Fe treatments, respectively. Soil cation exchange capacity (CEC) increased by 9.4%-164.1% in response to the application of BC-Fe (0.05-1.6%), while the soil Cd availability decreased by 6.81%-25.0%. However, 0.8-1.6% BC-Fe treatments promoted Cd transport to leaves, which could increase the risk of Cd accumulation in brown rice. Furthermore, BC-Fe application promoted the formation of iron plaque and enhanced the root interception of Cd. The formation of iron plaque reduced the toxicity of Cd to rice roots, but this barrier effect was limited and had an interval threshold (DCB-Fe: 22.5-27.3 g·kg-1) under BC-Fe treatments.
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Affiliation(s)
- Jing-Yi Zhang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
| | - Hang Zhou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China.
| | - Jiao-Feng Gu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
| | - Fang Huang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
| | - Wen-Jun Yang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
| | - Shi-Long Wang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
| | - Teng-Yue Yuan
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
| | - Bo-Han Liao
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China
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25
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Zou R, Wang L, Li YC, Tong Z, Huo W, Chi K, Fan H. Cadmium absorption and translocation of amaranth (Amaranthus mangostanus L.) affected by iron deficiency. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 256:113410. [PMID: 31679873 DOI: 10.1016/j.envpol.2019.113410] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 10/01/2019] [Accepted: 10/14/2019] [Indexed: 05/27/2023]
Abstract
Amaranth (Amaranthus mangostanus L.) has superior capability for accumulating cadmium (Cd) and has the potential to be used for phytoremediation of Cd contaminated soils. Iron (Fe) is chemically similar to Cd and may mediate Cd-induced physiological or metabolic impacts in plants. The purpose was to investigate the model of time-dependent and concentration-dependent kinetics of Cd absorption under Fe deficiency, understanding the physiological mechanism of Cd absorption in amaranth roots. The kinetic characteristics of Cd uptake by amaranth grown in Cd enriched nutritional solution with or without Fe addition and with methanol-chloroform, carbonyl cyanide 3-chlorophenylhydrazone (CCCP), and lanthanum chloride (LaCl3) were compared using 109Cd2+ isotope labeling technique. The results showed that Cd uptake was time-dependent and about 90-93% of uptake occurred during the first 150 min. The kinetics of Cd uptake showed that two stages were involved. The saturation stage fitted the Michaelis-Menten model when concentrations of Cd were lower than 12.71 μmol/L and then the absorption of Cd by roots was increased linearly during the second stage. Only linear absorption was observed with methanol-chloroform treatment while the metabolic inhibitor CCCP inhibited only the saturation absorption process, and the Ca channel inhibitor LaCl3 partially inhibited the two stages of absorption. These results indicated that the root absorption of 109Cd2+ was enhanced under Fe deficiency which induced more Fe transporters in the root cell membrane, and the Ca channel, apoplastic and symplastic pathways enhanced the Cd absorption in roots.
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Affiliation(s)
- Rong Zou
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Beijing 100081, China
| | - Li Wang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Beijing 100081, China
| | - Yuncong C Li
- Department of Soil and Water Sciences, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL 33031, USA
| | - Zhaohui Tong
- Department of Agricultural and Biological Engineering, IFAS, University of Florida, Gainesville, FL 32611, USA
| | - Wenmin Huo
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Beijing 100081, China; School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Keyu Chi
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Beijing 100081, China; Beijing Construction Engineering Group Environmental Remediation Co., Ltd. Beijing 100015, China
| | - Hongli Fan
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Beijing 100081, China; Department of Soil and Water Sciences, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL 33031, USA; Department of Agricultural and Biological Engineering, IFAS, University of Florida, Gainesville, FL 32611, USA.
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26
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Cai Y, Xu W, Wang M, Chen W, Li X, Li Y, Cai Y. Mechanisms and uncertainties of Zn supply on regulating rice Cd uptake. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 253:959-965. [PMID: 31351304 DOI: 10.1016/j.envpol.2019.07.077] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/15/2019] [Accepted: 07/15/2019] [Indexed: 05/27/2023]
Abstract
Application of Zinc (Zn) is considered an effective measure to reduce Cadmium (Cd) uptake and toxicity in Cd-contaminated soils for many plant species. However, interaction between Zn and Cd in rice plant is complex and uncertain. In this study, four indica rice cultivars were selected to evaluate the effect of Zn exposure in an EGTA-buffered nutrient solution under varying Zn activities and a field level of Cd activity to characterize the interaction between Zn and Cd in rice. Severe depression in shoots' biomass, tiller number, and SPAD (Soil and Plant Analyzer Development) value were found at both Zn deficiency and Zn phytotoxicity levels among four tested rice cultivars. There existed a strong antagonism interaction between Zn and Cd in both shoot and root from Zn deficiency to Zn phytotoxicity. The reduction of Cd accumulation in roots and shoots could be explained by the competition between Zn and Cd as well as the dilution effect of increasing biomass. The conflicting effect of Zn supply on Cd uptake may be attributed to the increasing transfer ratio of Cd from root to shoot with the increasing Zn2+ activities and the strong depression of Fe and Mn in shoots with the increasing Zn2+ activities as well as the variation of genotypes. Balance between Zn and Cd should be considered in field application.
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Affiliation(s)
- Yimin Cai
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weibiao Xu
- Jiangxi Super-rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Laboratory for Rice, Nanchang, 330200, China
| | - Meie Wang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Weiping Chen
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Xuzhi Li
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Yonghui Li
- Jiangxi Super-rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Laboratory for Rice, Nanchang, 330200, China
| | - Yaohui Cai
- Jiangxi Super-rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Laboratory for Rice, Nanchang, 330200, China
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27
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Ashraf S, Ali Q, Zahir ZA, Ashraf S, Asghar HN. Phytoremediation: Environmentally sustainable way for reclamation of heavy metal polluted soils. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:714-727. [PMID: 30878808 DOI: 10.1016/j.ecoenv.2019.02.068] [Citation(s) in RCA: 300] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 02/18/2019] [Accepted: 02/21/2019] [Indexed: 05/27/2023]
Abstract
Soil contamination with toxic metals is a widespread environmental issue resulting from global industrialization within the past few years. Therefore, decontamination of heavy metal contaminated soils is very important to reduce the associated risks and for maintenance of environmental health and ecological restoration. Conventional techniques for reclamation of such soils are expensive and environmental non-friendly. Phytoremediation is an emerging technology implementing green plants to clean up the environment from contaminants and has been considered as a cost-effective and non-invasive alternative to the conventional remediation approaches. There are different types of phytoremediation including, phytostabilization, phytostimulation, phytotransformation, phytofiltration and phytoextraction, the latter being most extensively acknowledged for remediation of soils contaminated with toxic heavy metals. Recent literature is gathered to critically review the sources, hazardous effects of toxic heavy metals and environmentally sustainable phytoremediation technique for heavy metal polluted soils to offer widespread applicability of this green technology. Different strategies to enhance the bioavailability of heavy metals in the soil are also discussed shortly. It can be concluded that phytoremediation of heavy metal contaminated soils is a reliable tool and necessary for making the land resource accessible for crop production.
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Affiliation(s)
- Sana Ashraf
- Institute of Soil & Environmental Sciences, University of Agriculture Faisalabad, Pakistan.
| | - Qasim Ali
- Institute of Soil & Environmental Sciences, University of Agriculture Faisalabad, Pakistan; College of Agriculture, Bahauddin Zakariya University, Bahadur Sub-campus Layyah, Pakistan
| | - Zahir Ahmad Zahir
- Institute of Soil & Environmental Sciences, University of Agriculture Faisalabad, Pakistan
| | - Sobia Ashraf
- Institute of Soil & Environmental Sciences, University of Agriculture Faisalabad, Pakistan
| | - Hafiz Naeem Asghar
- Institute of Soil & Environmental Sciences, University of Agriculture Faisalabad, Pakistan
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28
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Zhao JY, Ye ZH, Zhong H. Rice root exudates affect microbial methylmercury production in paddy soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:1921-1929. [PMID: 30072222 DOI: 10.1016/j.envpol.2018.07.072] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 07/16/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
Microbial methylmercury (MeHg) production in contaminated soil-rice systems and its accumulation in rice pose health risks to consumers, especially those in Asia. However, the mechanism responsible for microbial MeHg production in paddy soils is far from clear. While previous studies examined the effect of soil and microbial factors on soil MeHg levels, in this work we explored the impact of rice cultivation itself on microbial MeHg production, focusing on the root exudate organic matter as a potential source of electron donors for microbial methylators. Effects of the cultivation of two rice cultivars, Heigu246 (H-rice) and Neiwuyou8015 (N-rice), on MeHg production in soils were therefore investigated in pot and batch incubation experiments. Soil MeHg levels measured in H-rice treatment during the heading and harvest stages were 18-49% higher than in the control and 23-108% higher than in N-rice treatment. Consequently, MeHg levels in grain, straw, and root were 38%, 81%, and 40% higher in H-rice than those in N-rice, which was mainly attributed to cultivar-specific MeHg production in soils. Results of the batch experiments suggested that root exudate organic matter could be responsible for MeHg production in soils during rice cultivation, by increasing the abundances of potential microbial methylators. For instance, root exudate organic matter increased copy numbers of Hg methylation genes (hgcA) in soils 4.1-fold. Furthermore, the 211% higher concentration of acetate (a key electron donor for microbial methylators) in the root exudate of H-rice could account for the higher MeHg production under H-rice than N-rice cultivation. Our results suggest that root exudate organic matter, especially acetate, as its key component, contributes to the elevated soil MeHg concentrations during rice cultivation. The proposed mechanism provides new insights into the elevated risk of MeHg production in contaminated soil-rice systems, as well as cultivar-specific MeHg bioaccumulation.
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Affiliation(s)
- Jia-Yin Zhao
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Zhi-Hong Ye
- State Key Laboratory for Bio-control and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, PR China
| | - Huan Zhong
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China; Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario, Canada.
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Chen Z, Tang YT, Yao AJ, Cao J, Wu ZH, Peng ZR, Wang SZ, Xiao S, Baker AJM, Qiu RL. Mitigation of Cd accumulation in paddy rice (Oryza sativa L.) by Fe fertilization. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:549-559. [PMID: 28843203 DOI: 10.1016/j.envpol.2017.08.055] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 08/07/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
Cadmium uptake in rice is believed to be mediated by the Fe transport system. Phyto-available Cd can be changed by Fe fertilization of substrates. This work investigated whether and how Fe fertilization affects mitigation of Cd accumulation in paddy rice. A 90-d soil column experiment was conducted to study the change of Cd and Fe availability in soil after Fe fertilization (ionic and chelated Fe). A low-Cd accumulating cultivar (TY116) and a high-Cd accumulating cultivar (JY841) were grown in two Cd-polluted paddy soils amended with chelated Fe fertilizers. Additionally, both cultivars were grown in hydroponics to compare Fe-related gene expression in EDDHAFe-deficient and EDDHAFe-sufficient roots. The column experiment showed that EDTANa2Fe(II) and EDDHAFe(III) fertilization had a better mitigation effect on soil Cd availability compared to FeSO4·7H2O. Moreover, the field experiment demonstrated that these two chelated fertilizations could reduce Cd concentrations in brown rice by up to 80%. Iron concentrations in the brown rice were elevated by Fe chelates. Compared to EDDHAFe(III), EDTANa2Fe(II) fertilization had a stronger mitigation effect by generating more EDTANa2Cd(II) in the soil solution to decrease phyto-available Cd in the soil. While EDDHAFe(III) fertilization could increase soil pH and decrease soil Eh which contributed to decreasing phyto-available Cd in a contaminated soil. In the hydroponic experiment, Fe sufficiency significantly reduced Cd concentrations in above-ground organs. In some cases, the expression of OsIRT1, OsNRAMP1 and OsNRAMP5 was inhibited under Fe sufficiency relative to Fe deficiency conditions. These results suggest that mitigation of rice Cd by Fe chelate fertilization results from a decrease in available Cd in substrates and the inhibition of the expression of several Fe-related genes in the IRT and NRAMP families.
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Affiliation(s)
- Zhe Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, PR China
| | - Ye-Tao Tang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China.
| | - Ai-Jun Yao
- School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Jian Cao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Zhuo-Hao Wu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Zhe-Ran Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Shi-Zhong Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
| | - Shi Xiao
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Alan J M Baker
- School of BioSciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Rong-Liang Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
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30
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Tang W, Zhong H, Xiao L, Tan Q, Zeng Q, Wei Z. Inhibitory effects of rice residues amendment on Cd phytoavailability: A matter of Cd-organic matter interactions? CHEMOSPHERE 2017; 186:227-234. [PMID: 28780450 DOI: 10.1016/j.chemosphere.2017.07.152] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 07/27/2017] [Accepted: 07/28/2017] [Indexed: 05/27/2023]
Abstract
Incorporating crop residues into soils, a most common way of organic input into farmland soils, is being encouraged in many parts of the world, while its potential impacts on Cd phytoavailability are not well understood. Here, a Cd-contaminated soil was amended with rice residues (RR, i.e., straw + root mixture) or not (Control) and incubated for 81 days under laboratory-controlled conditions. During the incubation, key soil parameters (e.g., dissolved organic carbon and pH), Cd geochemical fractionation (by BCR sequential extraction), and CaCl2 extracted Cd in soils (by 0.01 M CaCl2 extraction) were quantified to explain the effects of RR amendment on Cd phytoavailability (assessed by 7 day-cultivation of rice seedling in soils). Besides, hydroponic experiments were designed to explore the effects of D-RR-OM (dissolved-RR-organic matter) on the uptake of Cd by rice seedlings (quantified by uptake constant rate, ku, using stable isotope tracing technique). Our results demonstrated that RR amendment reduced Cd phytoavailability by 17-92% compared with Control during incubation, which might be explained by the interactions between Cd and RR-OM (RR-organic matter) in soil or porewater: (1) Cd immobilization due to its association with solid-RR-OM in soils, (2) Cd mobilization by D-RR-OM, and (3) Cd complexation with D-RR-OM in porewater, and thus reduced ku of Cd. Our results suggested that dynamics of RR-OM (e.g., dissolution, decomposition and transformation) in soils, and thus interactions between Cd and solid/dissolved-RR-OM may control Cd phytoavailability under RR amendment. Information gained in this study would further our understanding about Cd phytoavailability in farming soils.
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Affiliation(s)
- Wenli Tang
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, Jiangsu Province, People's Republic of China.
| | - Huan Zhong
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, Jiangsu Province, People's Republic of China; Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario, Canada.
| | - Lin Xiao
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, Jiangsu Province, People's Republic of China.
| | - Qiaoguo Tan
- College of Environment and Ecology, Xiamen University, Key Laboratory of the Coastal and Wetland Ecosystems, Ministry of Education, Xiamen, Fujian Province, People's Republic of China.
| | - Qilong Zeng
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, Jiangsu Province, People's Republic of China.
| | - Zhongbo Wei
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, Jiangsu Province, People's Republic of China.
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