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Yang JS, Ahmed RI, Liu H, Sheng S, Xiao W, Hu R, Dai Y. Differential absorption of cadmium and zinc by tobacco plants: Role of apoplastic pathway. Biochem Biophys Rep 2024; 37:101641. [PMID: 38288283 PMCID: PMC10823060 DOI: 10.1016/j.bbrep.2024.101641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/19/2023] [Accepted: 01/06/2024] [Indexed: 01/31/2024] Open
Abstract
Cadmium (Cd) contamination presents a significant challenge in global agriculture. This study explores the efficacy of chemical induction, specifically using sodium chloride (NaCl), to limit Cd uptake in tobacco (Nicotiana tabacum) and assesses its impact on essential divalent metal ions (DMIs). We conducted a comprehensive analysis encompassing ion absorption, root histology, and biochemistry to understand the influence of this method. Our results revealed that NaCl induction led to a notable 30 % decrease in Cd absorption, while maintaining minimal impact on zinc (Zn) uptake. Intriguingly, the absence of essential DMIs, such as calcium (Ca), magnesium (Mg), and Zn, was found to diminish the plant's capacity to absorb Cd. Furthermore, moderate NaCl induction resulted in an increased diameter of the root stele and enhanced lignin content, indicating a restriction of Cd absorption through the apoplastic pathway. Conversely, a compensatory absorption mechanism via the symplastic pathway appeared to be activated in the absence of essential elements. These findings highlight the potential of chemical induction as a strategy to mitigate agricultural Cd risks, offering insights into the complex interplay between plant ion transport pathways and metal uptake regulation.
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Affiliation(s)
- Jia-Shuo Yang
- China Tobacco Central South Agricultural Experimental Station, Furong Road No. 628, Changsha, 410004, China
| | - Rana Imtiaz Ahmed
- Chinese Academy of Agricultural Sciences, Institute of Tobacco Research, Keyuanjingsi Road No. 11, Qingdao, 266101, China
| | - Haiwei Liu
- Chinese Academy of Agricultural Sciences, Institute of Tobacco Research, Keyuanjingsi Road No. 11, Qingdao, 266101, China
| | - Song Sheng
- Central South University of Forestry and Technology, Shaoshan Road No. 498, Changsha, 410004, China
| | - Wenfeng Xiao
- China Tobacco Central South Agricultural Experimental Station, Furong Road No. 628, Changsha, 410004, China
| | - Risheng Hu
- China Tobacco Central South Agricultural Experimental Station, Furong Road No. 628, Changsha, 410004, China
| | - Yanjiao Dai
- Hunan Academy of Agricultural Science, Yuanda Road No. 892, Changsha, 410125, China
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Irfan J, Ali A, Hussain MA, Abbas A, Haseeb MT, Naeem-Ul-Hassan M, Azhar I, Hussain SZ, Hussain I. Chemical modification of Aloe vera leaf hydrogel for efficient cadmium-removal from spiked high-hardness groundwater. Int J Biol Macromol 2024; 259:128879. [PMID: 38145696 DOI: 10.1016/j.ijbiomac.2023.128879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/13/2023] [Accepted: 12/16/2023] [Indexed: 12/27/2023]
Abstract
Herein, the hydrogel from the leaf of the Aloe vera plant (ALH) was succinylated (SALH) and saponified (NaSALH). The FTIR, solid-state CP/MAS 13C NMR, and SEM-EDX spectroscopic analyses witnessed the formation of SALH and NaSALH from ALH. The pHZPC for NaSALH was found to be 4.90, indicating the presence of -ve charge on its surface. The Cd2+ sorption efficiency of NaSALH was found to be dependent on pH, NaALH dose, Cd2+ concentration, contact time, and temperature. The maximum Cd2+ removal from DW and HGW was found to be 227.27 and 212.77 mg g-1 according to the Langmuir isothermal model (>0.99) at pH of 6, NaSALH dose of 40 mg g-1, Cd2+ concentration of 90 mg L-1, contact time of 30 min, and temperature of 298 K. The kinetic analysis of Cd2+ sorption data witnessed that the Cd2+ removal by chemisorption mechanism and followed pseudo-second-order kinetics (>0.99). The -ve values of ΔG° and ΔH° assessed the spontaneous and exothermic nature of sorption of Cd2+ by NaSALH. The regeneration and sorption/desorption studies indicated that the sorbent NaSALH is regenerable.
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Affiliation(s)
- Jaffar Irfan
- Institute of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Arshad Ali
- Institute of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Muhammad Ajaz Hussain
- Centre for Organic Chemistry, School of Chemistry, University of the Punjab, Lahore 54590, Pakistan.
| | - Azhar Abbas
- Institute of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | | | | | - Irfan Azhar
- Department of Chemistry, College of Science, Southern University of Science and Technology, Shenzhen 518055, China
| | - Syed Zajif Hussain
- Department of Chemistry, SBA School of Science & Engineering, Lahore University of Management Sciences, Lahore Cantt. 54792, Pakistan
| | - Irshad Hussain
- Department of Chemistry, SBA School of Science & Engineering, Lahore University of Management Sciences, Lahore Cantt. 54792, Pakistan
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Al-Huqail AA, Alghanem SMS, Abbas ZK, Al Aboud NM, Masood N, Irshad MA, Abbas T, Abeed AHA, Darwish DBE. Evaluation of nanoceria on cadmium uptake in Triticum aestivum (L.) and its implications for dietary health risk. Chemosphere 2023; 341:140115. [PMID: 37689157 DOI: 10.1016/j.chemosphere.2023.140115] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
In recent times, significant attention has been directed toward the synthesis and application of nanoparticles (NPs) in agriculture sector. In current study, nanoceria (CeO2 NPs) synthesized by green method were employed to address cadmium (Cd) accumulation in wheat (Triticum aestivum L.) cultivated in field with excess Cd. The application of CeO2 NPs was carried out through foliar spraying, performed twice during the growth of T. aestivum. Four levels of CeO2 NPs were used: T0, T1, T2, and T3 as 0, 50, 75, and 100 mgL-1, respectively. Results highlighted the positive effects of CeO2 NPs on various growth parameters, including plant height, spike length, photosynthetic related attributes, as well as straw and grain of grains in comparison to T1 (control group). Furthermore, CeO2 NPs led to a reduction in oxidative stress in the leaves and enhanced in enzyme activities in comparison to T1. Notably, Cd concentrations in straw, roots, and grains exhibited a decline following the treatment with CeO2 NPs, in contrast to the control group. In terms of health implications, the calculated health risk index associated with dietary consumption of grains by adults remained below the defined threshold with supply of nanoparticles. Foliar application of CeO2 NPs proved to be an effective approach in reducing cadmium content in wheat grains. This reduction holds significant potential for minimizing the risk of cadmium exposure to human health through the food chain. Employing the green synthesis method amplifies the potential for extensive production and a wide array of environmental applications for CeO2 NPs. This dual capacity makes them proficient in tackling environmental stresses while concurrently mitigating adverse ecological effects.
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Affiliation(s)
- Arwa Abdulkreem Al-Huqail
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
| | | | - Zahid Khorshid Abbas
- Department of Biology, Faculty of Sciences, University of Tabuk, Tabuk, 71491, Saudi Arabia
| | - Nora M Al Aboud
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Nasir Masood
- Department of Biosciences, COMSATS University Islamabad, Islamabad Campus, Tarlai Kalan Chak, Shehzad Park Road, Islamabad, 45550, Pakistan.
| | | | - Tahir Abbas
- Department of Environmental Sciences, University of Jhang, Pakistan
| | - Amany H A Abeed
- Department of Botany and Microbiology, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Doaa Bahaa Eldin Darwish
- Biology Department, Faculty of Science, University of Tabuk, Tabuk, 71491, Saudi Arabia; Botany Department, Faculty of Science, Mansoura University, Mansoura, 35511, Egypt
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Yan J, Wu X, Li T, Fan W, Abbas M, Qin M, Li R, Liu Z, Liu P. Effect and mechanism of nano-materials on plant resistance to cadmium toxicity: A review. Ecotoxicol Environ Saf 2023; 266:115576. [PMID: 37837699 DOI: 10.1016/j.ecoenv.2023.115576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/11/2023] [Accepted: 10/11/2023] [Indexed: 10/16/2023]
Abstract
Cadmium (Cd), one of the most toxic heavy metals, has been extensively studied by environmental scientists because of its detrimental effects on plants, animals, and humans. Increased industrial activity has led to environmental contamination with Cd. Cadmium can enter the food chain and pose a potential human health risk. Therefore, reducing the accumulation of Cd in plant species and enhancing their detoxification abilities are crucial for remediating heavy metal pollution in contaminated areas. One innovative technique is nano-phytoremediation, which employs nanomaterials ranging from 1 to 100 nm in size to mitigate the accumulation and detrimental effects of Cd on plants. Although extensive research has been conducted on using nanomaterials to mitigate Cd toxicity in plants, it is important to note that the mechanism of action varies depending on factors such as plant species, level of Cd concentration, and type of nanomaterials employed. This review aimed to consolidate and organize existing data, providing a comprehensive overview of the effects and mechanisms of nanomaterials in enhancing plant resistance to Cd. In particular, its deep excavation the mechanisms of detoxification heavy metals of nanomaterials by plants, including regulating Cd uptake and distribution, enhancing antioxidant capacity, regulating gene expression, and regulating physiological metabolism. In addition, this study provides insights into future research directions in this field.
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Affiliation(s)
- Jiyuan Yan
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Xiuzhe Wu
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Tong Li
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Weiru Fan
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Mohamed Abbas
- Electrical Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
| | - Mengzhan Qin
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Runze Li
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Zhiguo Liu
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China
| | - Peng Liu
- College of Plant Protection, Shandong Agricultural University, Taian 271018, Shandong province, China.
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Timilsina A, Adhikari K, Chen H. Foliar application of green synthesized ZnO nanoparticles reduced Cd content in shoot of lettuce. Chemosphere 2023; 338:139589. [PMID: 37478984 DOI: 10.1016/j.chemosphere.2023.139589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/03/2023] [Accepted: 07/19/2023] [Indexed: 07/23/2023]
Abstract
Though Zinc (Zn) supplementation can mitigate root-based Cadmium (Cd) uptake in plants, the impact of foliar-applied Zinc Oxide nanoparticles (ZnO NPs) on this process remains under-explored. This study investigates the influence of foliar-applied ZnO NPs on the growth of lettuce and its Cd uptake in Cd-contaminated soil in greenhouse setting. Green synthesized ZnO (G-ZnO) NPs (10 and 100 mg/L) using sweet potato leaf extracts were used, and compared with commercially available ZnO (C-ZnO) NPs (100 mg/L) for their efficacy. Scanning electron microscopy and Fourier-transform infrared spectroscopy were used for G-ZnO NPs characterization. Shoot dry weight, antioxidant activity, and chlorophyll content were all negatively affected by Cd but positively affected by ZnO NPs application. ZnO NPs application resulted in a notable reduction in lettuce Cd uptake, with the highest reduction (43%) observed at 100 mg/L G-ZnO NPs. In the lettuce shoot, Zn and Cd concentration showed a significant inverse correlation (R2 = 0.79-0.9, P < 0.05). This study offers insights into the impact of chemical and green synthesized ZnO NPs on enhancing crop growth under stress conditions, and their role in modulating Cd uptake in plants, indicating potential implications for sustainable agricultural practices.
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Affiliation(s)
- Anil Timilsina
- Department of Agriculture, University of Arkansas at Pine Bluff, AR, 71601, United States
| | - Kaushik Adhikari
- Department of Agriculture, University of Arkansas at Pine Bluff, AR, 71601, United States
| | - Hao Chen
- Department of Agriculture, University of Arkansas at Pine Bluff, AR, 71601, United States.
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Argüello D, Chavez E, Gutierrez E, Pittomvils M, Dekeyrel J, Blommaert H, Smolders E. Soil amendments to reduce cadmium in cacao (Theobroma cacao L.): A comprehensive field study in Ecuador. Chemosphere 2023; 324:138318. [PMID: 36907485 DOI: 10.1016/j.chemosphere.2023.138318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 02/28/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
The new EU regulations on maximum levels of cadmium (Cd) in cacao products sparked research on countermeasures to reduce Cd concentrations in cacao beans. This study was set up to test the effects of soil amendments in two established cacao orchards (soil pH 6.6 and 5.1) in Ecuador. Soil amendments included: 1) agricultural limestone at 2.0 and 4.0 Mg ha-1 y-1, 2) gypsum at 2.0 and 4.0 Mg ha-1 y-1 and 3) compost at 12.5 and 25 Mg ha-1 y-1, all amendments were applied at the surface during two subsequent years. Lime application increased the soil pH by one unit down to 20 cm depth. On the acid soil, leaf Cd concentrations decreased by lime application and the reduction factor gradually rose to 1.5 after 30 months. No effects of liming or gypsum on leaf Cd was found in the pH neutral soil. Compost application in the pH neutral soil reduced leaf Cd concentration with factor 1.2 at 22 months but that effect was absent at 30 months after application. Bean Cd concentrations were unaffected by any of the treatments at 22 months after application (acid soil) or 30 months (pH neutral soil) suggesting that any treatment effects on bean Cd might be even more delayed than in leaves. Soil columns experiments in the laboratory showed that mixing lime with compost largely enhanced the depth of lime penetration compared to lime only. Compost + lime reduced 10-3 M CaCl2 extractable Cd in soil without lowering extractable Zn. Our results suggest that soil liming has the potential to lower Cd uptake in cacao in the long term in acid soils and that the compost + lime treatment should be tested at field scale to accelerate the effects of the mitigation.
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Affiliation(s)
- D Argüello
- KU Leuven, Division of Soil and Water Management, Kasteelpark Arenberg 20, 3001 BE, Heverlee, Belgium; Escuela Superior Politécnica Del Litoral, ESPOL, Facultad de Ciencias de La Vida, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador
| | - E Chavez
- Escuela Superior Politécnica Del Litoral, ESPOL, Facultad de Ciencias de La Vida, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador.
| | - E Gutierrez
- Escuela Superior Politécnica Del Litoral, ESPOL, Facultad de Ciencias de La Vida, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador; Kansas State University, Department of Agronomy, Throckmorton Hall, 1712, Claflin Road, Manhattan, KS, USA
| | - M Pittomvils
- KU Leuven, Division of Soil and Water Management, Kasteelpark Arenberg 20, 3001 BE, Heverlee, Belgium
| | - J Dekeyrel
- KU Leuven, Division of Soil and Water Management, Kasteelpark Arenberg 20, 3001 BE, Heverlee, Belgium
| | - H Blommaert
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTERRE, Grenoble, France
| | - E Smolders
- KU Leuven, Division of Soil and Water Management, Kasteelpark Arenberg 20, 3001 BE, Heverlee, Belgium
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Qin S, Xu Y, Nie Z, Liu H, Gao W, Li C, Wang L, Zhao P. Effect of boron on cadmium uptake and expression of Cd transport genes at different growth stages of wheat (Triticum aestivum L.). Ecotoxicol Environ Saf 2022; 241:113834. [PMID: 36068760 DOI: 10.1016/j.ecoenv.2022.113834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/25/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
Boron (B) is an essential microelement for plant growth and has been shown to reduce cadmium (Cd) toxicity in wheat through modulating gene expression. However, there is not enough information about the effects of different applications of B fertilizer on the accumulation of Cd, particularly throughout the wheat growth period. This experiment employed two different B fertilization methods. The soil application method utilized 1.5 mg B kg-1 soil (Cd+B) and foliar application utilized 0.1% (F0.1%), 0.3% (F0.3%), and 0.6% (F0.6%) B concentrations along with 4 mg kg-1 Cd. The results showed that B application in the soil reduced Cd concentrations per plant by 43.9% at the seedling stage, 74.59% in the roots, and 52.11% in the shoots at the elongation stage. At the same time, Cd concentrations in the roots were higher by B application at the anthesis and maturity stages, suggesting that B retains more Cd in the roots. The gray correlation analysis showed that the gray relational coefficients followed the following order: F0.3% > F0.1% > Cd+B > F0.6%. According to quantitative real-time PCR analysis, the six Cd transporters were mostly expressed in the roots at the seedling stage and anthesis stage. In addition, the expression of TCONS1113, TRIAE1060, and TRIAE5370 showed a negative correlation relationship with Cd concentration at the seedling stage, both in roots and shoots. At the anthesis stage, the expression of TCONS1113 and TRIAE5370 in roots was higher in Cd-treated plants compared to B-treated plants, and a similar tendency was noted for the expression of TRIAE5770 and TRIAE1060 in shoots as well. These results suggest that B application could significantly inhibit Cd uptake and translocation by regulating the expression of Cd transporter genes, especially at the seedling stage and the elongation phase in wheat.
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Affiliation(s)
- Shiyu Qin
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Yafang Xu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Zhaojun Nie
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Hongen Liu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Wei Gao
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Chang Li
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Long Wang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China
| | - Peng Zhao
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Soil Pollution and Remediation of Henan Province, Zhengzhou 450002, Henan, China.
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Yang L, Huang S, Liu Y, Zheng S, Liu H, Rensing C, Fan Z, Feng R. Selenate regulates the activity of cell wall enzymes to influence cell wall component concentration and thereby affects the uptake and translocation of Cd in the roots of Brassica rapa L. Sci Total Environ 2022; 821:153156. [PMID: 35041952 DOI: 10.1016/j.scitotenv.2022.153156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/22/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Selenium (Se) can be used to counteract cadmium (Cd) toxicity in plants. However, mechanisms underlying the alleviation of Cd toxicity by Se have not been completely elucidated, especially those by which Se reduces Cd translocation. A hydroponic experiment was performed to illustrate the regulatory mechanisms of Cd transport by selenate (Se (VI)) in pakchoi (Brassica rapa L., LvYou 102). The results showed that this plant had a high accumulation capacity for Cd, and Se(VI) addition restricted Cd translocation from roots to shoots. Se(VI) exposure stimulated the concentrations of pectins and hemicellulose II but reduced the concentration of hemicellulose I in the roots. In many cases, the enzymes pectin methylesterase, polygalacturonase, and β-galactosidase were dose-dependently triggered by Se(VI) under Cd exposure, but root calcium concentration was significantly lowered (p < 0.05). Xyloglucan endoglycosidase (hydrolase) was triggered by Se(VI) under 2 mg L-1 Cd exposure and cellulase was generally activated by Se(VI) under Cd stress. The above results suggest that Se(VI) up-regulates pectin methylesterase activity, stimulates synthesis of pectins, and down-regulates root Ca concentration to release free carboxyl groups to combine Cd. In this study, the relationships between enzyme activity (e.g., peroxidase, superoxidase and β-galactosidase), hydrogen peroxide, cell wall structure strengthening/loosening, and Cd toxicity affected by Se(VI) were also discussed.
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Affiliation(s)
- Li Yang
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - ShuangQin Huang
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Yang Liu
- Agricultural College, Guangxi University, Nanning, China
| | - ShunAn Zheng
- Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China.
| | - Hong Liu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - ZhiLian Fan
- Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
| | - RenWei Feng
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China.
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Liu W, Huo C, He L, Ji X, Yu T, Yuan J, Zhou Z, Song L, Yu Q, Chen J, Chen N. The NtNRAMP1 transporter is involved in cadmium and iron transport in tobacco (Nicotiana tabacum). Plant Physiol Biochem 2022; 173:59-67. [PMID: 35101795 DOI: 10.1016/j.plaphy.2022.01.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/20/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Plant natural resistance-associated macrophage protein (NRAMP) plays an important role in maintaining intracellular metal homeostasis and coping with environmental heavy metal stress. Until now, studies on NRAMP in tobacco have been limited. In this study, NtNRAMP1 was cloned from tobacco cultivar TN90, and the highest expression level was observed in the roots, which was strongly induced by Fe deficiency. Heterologously expressed NtNRAMP1 significantly increased the Cd sensitivity of the yeast Δycf1 mutant. Three overexpressed NtNRAMP1 lines were generated to reveal the biofunction of NtNRAMP1. In the soil pot experiments under natural conditions, the contents of Fe and total chlorophyll were increased in the leaves of transgenic tobacco compared with the WT. To reveal the characteristics of NtNRAMP1 in metal transport, transgenic plants were cultured in hydroponic solution with 50 μM Cd and 200 μM Fe. Compared with the WT, the Cd concentrations in transgenic plants increased by 1.26-2.02-fold in the roots. Interestingly, the Cd content in the shoots of transgenic plants was slightly reduced compared with that of the WT. Overexpression of NtNRAMP1 did not promote Fe uptake from the external environment into the roots but enhanced the transfer of Fe from the roots to shoots. Additionally, Fe overload in the leaves of transgenic tobacco resulted in increased levels of MDA and H2O2 while Fe toxicity may be relieved by POD. In conclusion, overexpression of NtNRAMP1 in tobacco could promote Cd uptake and Fe transport from the roots to shoots while disturbing Fe homeostasis in the leaves of transgenic tobacco.
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Affiliation(s)
- Wanhong Liu
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China; Chongqing Key Laboratory of Industrial Fermentation Microorganism, Chongqing University of Science and Technology, Chongqing, 401331, China.
| | - Chunsong Huo
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Linshen He
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Xue Ji
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Ting Yu
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Jinwei Yuan
- College of Resources and Environment Science, Southwest University, Chongqing, 400715, China
| | - Ziyi Zhou
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Lingrong Song
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Qin Yu
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Ji Chen
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
| | - Nan Chen
- School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
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Gao M, Xu Y, Chang X, Song Z. Combined effects of carbon nanotubes and cadmium on the photosynthetic capacity and antioxidant response of wheat seedlings. Environ Sci Pollut Res Int 2021; 28:34344-34354. [PMID: 33644839 DOI: 10.1007/s11356-021-13024-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 02/15/2021] [Indexed: 06/12/2023]
Abstract
A detailed study of nanomaterials has revealed their broad application prospects. However, the presence of carbon nanotubes (CNTs) in the environment has been increasing and has aroused concerns regarding their toxicity to crops when combined with heavy metals. In the present study, the effects of Cd on the photosynthetic capacity and antioxidant activity of wheat seedlings in the presence of single-walled CNTs (SW) and multi-walled CNTs (MW) were investigated. Our results indicated that SW (5-40 mg L-1) and MW (10-40 mg L-1) significantly increased the oxidative stress response of wheat seedlings to Cd. Compared with Cd alone, CNTs combined with Cd decreased net photosynthetic rate, stomatal conductance, transpiration rate, primary maximum photochemical efficiency of photosystem II, actual quantum yield, photosynthetic electron transport rate, root canal protein, and ribulose-1,5-bisphosphate carboxylase/oxygenase content. Moreover, combined treatments increased the content of superoxide anion, superoxide dismutase, guaiacol peroxidase, cytochrome, and malondialdehyde in wheat seedlings. Moreover, membrane lipid peroxidation was aggravated, causing serious damage to the wheat membrane system. In addition, the toxicity of the SW treatment and the combined treatment with SW and Cd was higher than that of the MW treatment.
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Affiliation(s)
- Minling Gao
- Department of Civil and Environmental Engineering, Shantou University, No. 243 Daxue Road, Shantou, 515063, China
| | - Yalei Xu
- School of Environmental Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Xipeng Chang
- School of Environmental Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Zhengguo Song
- Department of Civil and Environmental Engineering, Shantou University, No. 243 Daxue Road, Shantou, 515063, China.
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11
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Thomas M. A comparative study of the factors affecting uptake and distribution of Cd with Ni in barley. Plant Physiol Biochem 2021; 162:730-736. [PMID: 33799184 DOI: 10.1016/j.plaphy.2021.03.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/19/2021] [Indexed: 06/12/2023]
Abstract
Food crops often accumulate heavy metals above the recommended limits. Cadmium (Cd) is particularly harmful in terms of its potential dangers to human health. The effects of nutrient status and cation competition on Cd uptake and distribution in barley were investigated to analyse the main route for Cd entry into the plants. Cd uptake into whole plants was measured by radiotracer studies and elemental analysis using environmentally relevant concentrations. The nutrient status of the plants was altered by growing them hydroponically in micronutrient-deficient conditions (-Fe, -Mn, or -Zn). Fe and Zn were found to have a large effect on the uptake of Cd both via deficiencies and by the competition for uptake. However, Mn was found to have no effect on the uptake of Cd either via deficiency or by the competition for uptake. This strongly suggests that the main route for Cd uptake into the roots is via Fe and Zn transporters. The inhibition of Cd influx only by FeII (but not by FeIII) suggests that Cd uptake into the root occurs through divalent cation transporters. Since Cd is a non-essential metal in plants, the transport characteristics were compared with those of an essential micronutrient, Ni. At the same external concentration, more than twice as much Cd was absorbed as Ni in all of the different nutrient conditions. Ni translocation to the shoot was much lower than for Cd. The comparison of two metals showed some similarities in the root uptake processes but not in the shoot translocation.
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Affiliation(s)
- Merrine Thomas
- Department of Ecology and Environmental Sciences, School of Biological Sciences, University of Adelaide, Adelaide, 5005, South Australia, Australia.
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12
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Huang S, Rao G, Ashraf U, Deng Q, Dong H, Zhang H, Mo Z, Pan S, Tang X. Ultrasonic seed treatment improved morpho-physiological and yield traits and reduced grain Cd concentrations in rice. Ecotoxicol Environ Saf 2021; 214:112119. [PMID: 33714137 DOI: 10.1016/j.ecoenv.2021.112119] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/07/2021] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
Rice cultivation under cadmium (Cd) contaminated soil often results in reduced growth with excess grain Cd concentrations. A pot experiment was conducted to assess the potential of ultrasonic seed treatment to alleviate Cd stress in rice. Seeds of two aromatic rice cultivars i.e., Xiangyaxiangzhan and Meixiangzhan 2 and two non-aromatic rice cultivars i.e., Huahang 31 and Guangyan 1 were exposed to ultrasonic waves for 1.5 min in 20-40 KHz mixing frequency. The experimental treatments were comprised of untreated seeds (U0) and ultrasonic treated seeds (U1) transplanted in un-contaminated soil (H0) and Cd-contaminated soil (H1). Results revealed that Cd contents and Cd accumulation in grain in U1 were 33.33-42.31% and 12.86-57.58% lower than U0 for fragrant rice cultivars under H1. Meanwhile, biomass production was higher in U1 than U0 under H0 and better yield was assessed in U1 for all cultivars under H1. The activity of peroxidase (POD) in flag leaves was increased by 8.28-115.65% for all cultivars while malondialdehyde (MDA) contents were significantly decreased in U1 compared with U0 under H0. Conclusively, ultrasonic treatment modulated Cd distribution and accumulation in different parts while improved physiological performance as well as yield and grain quality of rice under Cd contaminated conditions.
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Affiliation(s)
- Suihua Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China
| | - Gangshun Rao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China; College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China
| | - Umair Ashraf
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China; Department of Botany, Division of Science and Technology, University of Education, Lahore, 54770 Punjab, Pakistan
| | - Quanqing Deng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
| | - Hao Dong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Huailin Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zhaowen Mo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China
| | - Shenggang Pan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China
| | - Xiangru Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China.
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13
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Tousi S, Zoufan P, Ghahfarrokhie AR. Alleviation of cadmium-induced phytotoxicity and growth improvement by exogenous melatonin pretreatment in mallow (Malva parviflora) plants. Ecotoxicol Environ Saf 2020; 206:111403. [PMID: 33011513 DOI: 10.1016/j.ecoenv.2020.111403] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 09/18/2020] [Accepted: 09/20/2020] [Indexed: 05/26/2023]
Abstract
The present work was aimed to study the effect of melatonin pretreatments on growth, oxidative stress modulation, cadmium (Cd) accumulation, and tolerance in mallow (Malva parviflora, Malvaceae) plants under the hydroponic system. Application of substances that can modulate the harmful effects of Cd on plant yield and reduce its accumulation in the edible parts is of particular importance. Therefore, the mallow plants pretreated with 15, 50, and 100 µM of melatonin were exposed to 50 µM Cd. Our results showed that melatonin, especially at 15 and 50 µM, led to positive effects on Cd tolerance, including a significant increase in growth, photosynthetic pigments, and soluble protein content. Exogenous melatonin could improve relative water content (RWC) and stomatal conductance in the plants treated with Cd, probably through an increase in proline. Further, lower concentrations of melatonin led to a decrease in Cd translocation to the shoots. Based on the results, melatonin considerably increased catalase (CAT), superoxide dismutase (SOD), and guaiacol peroxidase (GPX) activities as well as the production of phenols. The increased activity of antioxidant enzymes led to a decrease in electrolyte leakage (EL), lipid peroxidation, and H2O2 content in the plants exposed to Cd stress. Under Cd stress, the increased phenols content in melatonin-pretreated plants could be due to the induction of phenylalanine ammonia-lyase (PAL) activity and an increase in shoot soluble carbohydrates. The results showed that the use of melatonin could reduce oxidative stress and improve biomass in the plants exposed to Cd. At least in our experimental conditions, this information appears to be useful for healthy food production.
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Affiliation(s)
- Saham Tousi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Parzhak Zoufan
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
| | - Afrasyab Rahnama Ghahfarrokhie
- Department of Production Engineering and Plant Genetics, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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14
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Kwok ML, Li ZP, Law TYS, Chan KM. Promotion of cadmium uptake and cadmium-induced toxicity by the copper transporter CTR1 in HepG2 and ZFL cells. Toxicol Rep 2020; 7:1564-1570. [PMID: 33294387 PMCID: PMC7695923 DOI: 10.1016/j.toxrep.2020.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 11/05/2020] [Accepted: 11/09/2020] [Indexed: 11/20/2022] Open
Abstract
Cadmium (Cd2+) is considered a human carcinogen as it causes oxidative stress and alters DNA repair responses. However, how Cd2+ is taken up by cells remains unclear. We hypothesized that Cd2+ could be transported into cells via a membrane copper (Cu) transporter, CTR1. CTR1 expression was not affected by Cd2+ exposure at the mRNA or protein level. Stable cell lines overexpressing either hCTR1, in the human liver cell line HepG2, or zCTR1, in the zebrafish liver cell line ZFL, were created to study their responses to Cd2+ insult. It was found that both HepG2 and ZFL cells overexpressing CTR1 had higher Cd2+ uptake and thus became sensitive to Cd2+. In contrast, hCTR1 knockdown in HepG2 cells led to a reduced uptake of Cd2+, making the cells relatively resistant to Cd2+. Localization studies revealed that hCTR1 had a clustered pattern after Cd2+ exposure, possibly in an attempt to reduce both Cd2+ uptake and Cd2+-induced toxicity. These in vitro results indicate that CTR1 can transport Cd2+ into the cell, resulting in Cd2+ toxicity.
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Key Words
- CTR1, High-affinity Cu-uptake protein 1
- Cadmium toxicity
- Cadmium uptake
- Cd, Cadmium
- Copper transporter
- Cu, Copper
- LC50, Median lethal concentration
- PBS, Phosphate-buffered saline
- Stable cell line
- h, hours
- hCTR1, Human CTR1 protein
- hCtr1, Human CTR1 gene
- min, minutes
- qPCR, Quantitative real-time PCR
- ybx1, Y box-binding protein 1 gene
- zCTR1, Zebrafish CTR1 protein
- zCtr1, Zebrafish CTR1 gene
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15
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G. Tsadik YK, Hailu AM, Asfaw SL, Mekonnen YS. The effect of brewery sludge biochar on immobilization of bio-available cadmium and growth of Brassica carinata. Heliyon 2020; 6:e05573. [PMID: 33305046 PMCID: PMC7711143 DOI: 10.1016/j.heliyon.2020.e05573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/09/2020] [Accepted: 11/18/2020] [Indexed: 11/30/2022] Open
Abstract
Biochar has gained an attention in reducing the bio-availability of toxic heavy metals and minimize threat of entering into food chain from contaminated soil. This study was aimed at evaluating the potential use of brewery sludge biochar (BSB) as a soil amendment for reducing cadmium bio-availability and uptake by Brassica carinata in a pot experiment. In this pot experiment, artificially cadmium spiked, moderately fertile, and slightly basic silty-loam soil was used. The biochar was produced by pyrolyzing of the brewery sludge at 500 °C. The obtained biochar was sieved with 0.5 mm mesh size and applied at the rate of 4 % (w/w) on the Brassica carinata grown cadmium spiked soil. The additions of BSB to the soil contributed a significant reduction of the bio-availability of cadmium in the soil and its accumulation in the shoot of Brassica carinata by 86% and 93%, respectively. Besides, it remarkably increased the dry weight of the edible part of Brassica carinata by 228%. The results revealed that BSB is very effective additive in cadmium immobilization, in turn, significantly (p-value = 0.00) promoting vegetable (Brassica carinata) growth. Therefore, BSB can be used as agricultural soil remedy for cadmium contamination and as safe disposal of brewery sludge.
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Affiliation(s)
- Yordanos Kiros G. Tsadik
- Center for Environmental Science, College of Natural and Computational Sciences, Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Abrha Mulu Hailu
- Center for Environmental Science, College of Natural and Computational Sciences, Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
- Department of Chemistry, College of Natural and Computational Sciences, Aksum University, P.O. Box 1010, Axum, Ethiopia
| | - Seyoum Leta Asfaw
- Center for Environmental Science, College of Natural and Computational Sciences, Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Yedilfana Setarge Mekonnen
- Center for Environmental Science, College of Natural and Computational Sciences, Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
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16
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Li J, Wu F, Fang Q, Wu Z, Duan Q, Li X, Ye W. The mutual effects of graphene oxide nanosheets and cadmium on the growth, cadmium uptake and accumulation in rice. Plant Physiol Biochem 2020; 147:289-294. [PMID: 31901451 DOI: 10.1016/j.plaphy.2019.12.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/25/2019] [Accepted: 12/26/2019] [Indexed: 05/27/2023]
Abstract
The broad application and unique properties of graphene oxide (GO) nanosheets make them interact with other pollutants and subsequently alter their behaviors and toxicities. However, investigation on the effects of GO nanosheets on plant uptake of co-occurring heavy metals is scarce. We evaluated the mutual effects of cadmium (Cd) at 1 mg/L and different concentrated GO nanosheets (0, 1 and 10 mg/L) on the rice seed germination, further seedling growth, Cd uptake and accumulation in rice roots and shoots in a hydroponic system. The effects of GO were concentration dependent. GO alone at 1 mg/L showed no apparent effects, while GO alone at 10 mg/L accelerated the rice seed germination and root growth due to the improved water uptake. Cd alone showed adverse effects on the rice seed germination, which was alleviated by the presence of GO at 1 or 10 mg/L. GO at 10 mg/L also increased the membrane permeability, thus enhancing Cd uptake by rice roots and shoots. These results indicate that GO can change the effects of Cd on the rice seed germination and Cd uptake as well as accumulation in the roots and shoots of rice seedlings, which is helpful for understanding the fate and ecotoxicological impacts of both GO and Cd.
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Affiliation(s)
- Jie Li
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Fan Wu
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Qing Fang
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Zheng Wu
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Qingyun Duan
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Xuede Li
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Wenling Ye
- Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China; Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China.
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17
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Zhu Z, Huang Y, Wu X, Liu Z, Zou J, Chen Y, Su N, Cui J. Increased antioxidative capacity and decreased cadmium uptake contribute to hemin-induced alleviation of cadmium toxicity in Chinese cabbage seedlings. Ecotoxicol Environ Saf 2019; 177:47-57. [PMID: 30959312 DOI: 10.1016/j.ecoenv.2019.03.113] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 03/25/2019] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Hemin (ferroprotoporphyrin IX), a compound derivative of heme, has been shown to exert numerous beneficial physiological functions in the resistance of plant to various abiotic stresses. This work investigated the effects of hemin on ameliorating Cd toxicity in Chinese cabbage (Brassica chinensis L.). Our results showed that leaf chlorosis, growth inhibition, root morphology and photosynthetic activity were significantly improved by the addition of hemin in Cd-stressed plants. Meanwhile, Cd-induced oxidative damage was also alleviated by hemin, which was supported by the decreased level of malondialdehyde (MDA) in roots of the seedlings treated with hemin. In the same time, the activities of antioxidative enzymes, including superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT), as well as the concentrations of ascorbic acid (AsA) and glutathione (GSH) were elevated by hemin, which contributed to the scavenging of Cd-elicited H2O2 and O2•- within the roots of Chinese cabbage seedlings. Furthermore, compared with Cd stressed plants, Cd concentrations in both shoots and roots were markedly decreased by exogenous hemin. Hence, it can be speculated that hemin-mediated tolerance to Cd stress may be associated with the inhibition of Cd uptake in Chinese cabbage. This hypothesis was supported by the down-regulated expressions of transporter genes, including BcIRT1, BcIRT2, BcNramp1 and BcZIP2 caused by hemin addition in Chinese cabbage seedlings under Cd treatment. Taken together, these results suggested that hemin alleviated Cd toxicity probably through increasing antioxidative capacities and inhibiting Cd uptake of Chinese cabbage.
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Affiliation(s)
- Zhengbo Zhu
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yifan Huang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xue Wu
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Zili Liu
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jianwen Zou
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yahua Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
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18
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Engbersen N, Gramlich A, Lopez M, Schwarz G, Hattendorf B, Gutierrez O, Schulin R. Cadmium accumulation and allocation in different cacao cultivars. Sci Total Environ 2019; 678:660-670. [PMID: 31078857 DOI: 10.1016/j.scitotenv.2019.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/30/2019] [Accepted: 05/01/2019] [Indexed: 04/14/2023]
Abstract
Cadmium (Cd) is a biologically non-essential heavy metal that can cause toxic effects in plants, animals and humans already at low concentrations compared to other metals. After Cd concentrations in cacao beans of various provenances, particularly from Latin America, were found to exceed the new regulations enforced by the European Union in 2019, there is an urgent need to find measures to lower Cd accumulation in cacao beans to acceptable values. In this research, the long-term cacao cultivar trial CEDEC-JAS in northern Honduras was used to investigate differences between 11 cultivars in Cd uptake and translocation. Sampling of various plant parts, including rootstocks, scions, leaves and beans, from three replicate trees per cultivar and the soil around each tree was conducted at this site. Results indicate that concentrations of available soil Cd were more closely correlated with Cd concentrations of the rootstocks (R2 = 0.56), scions (R2 = 0.59) and leaves (R2 = 0.46) than with bean Cd concentrations (R2 = 0.26). In addition, Cd concentrations of rootstocks, scions and leaves showed close relationships to available soil Cd concentrations, with no significant differences between the cultivars. In contrast, bean Cd concentrations showed only weak correlations to available soil Cd and Cd concentrations in the vegetative plant parts, but significant variation among cultivars. Three cultivars, which were analysed in more detail, showed significant differences in Cd concentrations of mature beans, but not of immature beans. These results suggest that cultivar-related differences in bean Cd concentrations primarily result from differences in Cd loading during bean maturation, possibly due to cultivar-specific differences in the xylem-to-phloem transfer of Cd. The results show that selection of cultivars with low Cd transfer from vegetative parts into the beans has high potential to keep Cd accumulation in cacao beans at levels that are safe for consumption.
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Affiliation(s)
- Nadine Engbersen
- Institute of Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zürich, Universitätsstrasse 16, 8092 Zürich, Switzerland.
| | - Anja Gramlich
- Institute of Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zürich, Universitätsstrasse 16, 8092 Zürich, Switzerland
| | - Marlon Lopez
- Honduran Foundation for Agricultural Research (FHIA), La Lima, Cortés, Honduras
| | - Gunnar Schwarz
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8052 Zürich, Switzerland
| | - Bodo Hattendorf
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8052 Zürich, Switzerland
| | - Osman Gutierrez
- USDA-ARS Subtropical Horticulture Research Station, 13601 Old Cutler Road, Miami, FL, USA
| | - Rainer Schulin
- Institute of Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zürich, Universitätsstrasse 16, 8092 Zürich, Switzerland
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19
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Zhang K, Wang G, Bao M, Wang L, Xie X. Exogenous application of ascorbic acid mitigates cadmium toxicity and uptake in Maize (Zea mays L.). Environ Sci Pollut Res Int 2019; 26:19261-19271. [PMID: 31065988 DOI: 10.1007/s11356-019-05265-5260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/23/2019] [Indexed: 05/27/2023]
Abstract
Cadmium (Cd) contamination in agricultural soils is a prevalent environmental issue and poses potential threats to food security. Foliar ascorbic acid might prove a potent tool to alleviate toxicity of Cd toxicity in maize. An experiment was conducted with objectives to study exogenous ascorbic acid-modulated improvements in physiochemical attributes of maize under Cd toxicity. The experiment was conducted under completely randomized design. Treatments were comprised of varying concentrations of foliar ascorbic acid viz. 0.0, 0.1, 0.3, and 0.5 mM of AsA. Toxicity of Cd decreased the maize growth, increased lipid peroxidation, disturbed protein metabolism, and reduced the antioxidant defense capabilities compared with the control. However, foliar AsA significantly improved maize growth and development, photosynthetic capabilities, and protein concentrations in Cd-stressed maize plants. Meanwhile, the malondialdehyde contents and hydrogen peroxide accumulation levels in Cd-stressed maize plants decreased remarkably with increasing AsA concentrations. Furthermore, the combined treatments conspicuously boosted activities of superoxide dismutase, peroxidase, catalase, and glutathione reductase under the Cd stress alone. In addition, the application of AsA reduced the Cd uptake by 10.3-12.3% in grains. Conclusively, foliar ascorbic acid alleviated the negative effects of Cd stress in maize and improved photosynthetic processes, osmolytes, and antioxidant defense systems.
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Affiliation(s)
- Kangping Zhang
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China
| | - Guiyin Wang
- College of Environmental Science, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Mingchen Bao
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China
| | - Longchang Wang
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China.
| | - Xiaoyu Xie
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China.
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Zhang K, Wang G, Bao M, Wang L, Xie X. Exogenous application of ascorbic acid mitigates cadmium toxicity and uptake in Maize (Zea mays L.). Environ Sci Pollut Res Int 2019; 26:19261-19271. [PMID: 31065988 DOI: 10.1007/s11356-019-05265-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/23/2019] [Indexed: 05/20/2023]
Abstract
Cadmium (Cd) contamination in agricultural soils is a prevalent environmental issue and poses potential threats to food security. Foliar ascorbic acid might prove a potent tool to alleviate toxicity of Cd toxicity in maize. An experiment was conducted with objectives to study exogenous ascorbic acid-modulated improvements in physiochemical attributes of maize under Cd toxicity. The experiment was conducted under completely randomized design. Treatments were comprised of varying concentrations of foliar ascorbic acid viz. 0.0, 0.1, 0.3, and 0.5 mM of AsA. Toxicity of Cd decreased the maize growth, increased lipid peroxidation, disturbed protein metabolism, and reduced the antioxidant defense capabilities compared with the control. However, foliar AsA significantly improved maize growth and development, photosynthetic capabilities, and protein concentrations in Cd-stressed maize plants. Meanwhile, the malondialdehyde contents and hydrogen peroxide accumulation levels in Cd-stressed maize plants decreased remarkably with increasing AsA concentrations. Furthermore, the combined treatments conspicuously boosted activities of superoxide dismutase, peroxidase, catalase, and glutathione reductase under the Cd stress alone. In addition, the application of AsA reduced the Cd uptake by 10.3-12.3% in grains. Conclusively, foliar ascorbic acid alleviated the negative effects of Cd stress in maize and improved photosynthetic processes, osmolytes, and antioxidant defense systems.
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Affiliation(s)
- Kangping Zhang
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China
| | - Guiyin Wang
- College of Environmental Science, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Mingchen Bao
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China
| | - Longchang Wang
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China.
| | - Xiaoyu Xie
- College of Agronomy and Biotechnology, Ministry of Education, Southwest University/Engineering Research Center of South Upland Agriculture, Chongqing, 400716, China.
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21
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Rehman MZU, Rizwan M, Rauf A, Ayub MA, Ali S, Qayyum MF, Waris AA, Naeem A, Sanaullah M. Split application of silicon in cadmium (Cd) spiked alkaline soil plays a vital role in decreasing Cd accumulation in rice (Oryza sativa L.) grains. Chemosphere 2019; 226:454-462. [PMID: 30951940 DOI: 10.1016/j.chemosphere.2019.03.182] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 03/21/2019] [Accepted: 03/28/2019] [Indexed: 05/15/2023]
Abstract
Food contamination with cadmium (Cd) is a serious health threat to humans worldwide and Cd accumulation by rice is a major source of Cd entrance to the food chain. Silicon (Si) application decreases the Cd content in rice but the timing of Si application may need further investigation. The present study investigated the effect of split application of Si in the soil (600 kg/ha of Si) at different growth stages of rice on the growth and Cd accumulation by rice under Cd stress. Rice plants were grown in the presence and absence of Cd and Si was applied in the soil at different growth stages of rice under Cd stress. The results indicated that Cd stress alone reduced the growth and photosynthesis and increased the Cd content in different tissues and grains of rice. Silicon application improved the plant growth and reduced the Cd accumulation, translocation factor, and bioaccumulation factor in rice especially in grains, whereas the response of Si varied with the application of Si at different growth stages. The application of Si in three splits (transplanting (S1), tillering (S2), panicle initiation (S3)) was the best in improving growth and reducing Cd concentrations in plants compared to other combinations of Si application. Silicon application in three splits (S1+S2+S3) reduced the grain Cd concentrations below the threshold level (0.2 mg/kg) and reduced the Cd health risk index under the experimental conditions. Overall, split application of Si at three growth stages may function as remediator and diminishes Cd uptake into rice grains.
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Affiliation(s)
- Muhammad Zia Ur Rehman
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan.
| | - Arslan Rauf
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Muhammad Ashar Ayub
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
| | - Muhammad Farooq Qayyum
- Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Aisha A Waris
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Asif Naeem
- Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
| | - Muhammad Sanaullah
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
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22
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Cavanagh JAE, Yi Z, Gray CW, Munir K, Lehto N, Robinson BH. Cadmium uptake by onions, lettuce and spinach in New Zealand: Implications for management to meet regulatory limits. Sci Total Environ 2019; 668:780-789. [PMID: 30865908 DOI: 10.1016/j.scitotenv.2019.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 03/01/2019] [Accepted: 03/01/2019] [Indexed: 06/09/2023]
Abstract
Paired soil and plant samples collected from the main commercial growing areas for onions (Allium cepa), lettuce (Lactuca sativa) and spinach (Spinacia olearacea) in New Zealand were used to assess the influence of plant and soil factors on cadmium (Cd) uptake in these crops. Differences in Cd concentration between eight lettuce sub-types were not consistent across sites, nor were differences in Cd concentrations in three crisphead cultivars assessed at two sites. Similarly, differences in Cd concentrations between four onion cultivars were inconsistent across sites. Mean lettuce Cd concentrations in eight lettuce varieties (range 0.005-0.034 mg∙kg-1 (fresh weight, FW) were markedly lower than those in baby leaf and bunching spinach, (range 0.005-0.19 mg∙kg-1 FW). Significant regional variation was observed in Cd concentrations in one onion cultivar (mean range 0.007-0.05 mg∙kg-1 FW). Soil Cd concentration, pH and region were statistically significant predictors of onion Cd concentration, explaining low (38% for soil Cd and pH) to moderate (50% for all three parameters) percentage of the variation. Soil Cd concentration and exchangeable magnesium or total carbon were statistically significant predictors of Cd concentration in baby leaf and bunching spinach, respectively, explaining a moderate percentage (49% and 42%) of the variation in Cd concentration. Increasing pH and soil carbon may assist in minimising Cd uptake in onion and bunching spinach, respectively. The low to moderate proportion of explained variation is partly attributable to the narrow range in some measured soil properties and indicates factors other than those assessed are influencing plant uptake. This highlights a challenge in using these relationships to develop risk-based soil guideline values to support compliance with food standards. Similarly, the inconsistency in Cd concentrations in different cultivars across sites highlights the need for multi-site assessments to confirm the low Cd accumulation status of different cultivars.
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Affiliation(s)
- Jo-Anne E Cavanagh
- Manaaki Whenua - Landcare Research, Gerald Street, PO Box 69040, Lincoln 7640, New Zealand.
| | - Z Yi
- Faculty of Agricultural and Life Sciences, Lincoln University, PO Box 7647, Lincoln 7647, New Zealand
| | - C W Gray
- AgResearch, Lincoln Research Centre, Private Bag, Christchurch 4749, New Zealand
| | - K Munir
- Manaaki Whenua - Landcare Research, Gerald Street, PO Box 69040, Lincoln 7640, New Zealand
| | - N Lehto
- Faculty of Agricultural and Life Sciences, Lincoln University, PO Box 7647, Lincoln 7647, New Zealand
| | - B H Robinson
- Manaaki Whenua - Landcare Research, Gerald Street, PO Box 69040, Lincoln 7640, New Zealand
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Du J, Qiu B, Pedrosa Gomes M, Juneau P, Dai G. Influence of light intensity on cadmium uptake and toxicity in the cyanobacteria Synechocystis sp. PCC6803. Aquat Toxicol 2019; 211:163-172. [PMID: 30991162 DOI: 10.1016/j.aquatox.2019.03.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 03/18/2019] [Accepted: 03/24/2019] [Indexed: 05/02/2023]
Abstract
The mechanisms of cadmium toxicity to cyanobacterial photosynthesis have been extensively studied, but the response mechanisms to combinations of different cadmium concentrations and different light intensities are not yet well understood. The two principal objectives of the present work were to: 1) study the short term (5 h) toxic effects of cadmium on Synechocystis PCC6803 under three different culturing light intensity conditions; and, 2) investigate the effects of light history on Cd toxicity to Synechocystis. The maximal (ФM) and operational (Ф'M) photosystem II quantum yields, photosystem I quantum yield [Y (I)], cyclic electron flow, relative photochemical quenching (qPrel), relative non-photochemical quenching (qNrel), relative unquenched fluorescence (UQFrel), pigment contents, and cadmium uptake were evaluated when Synechocystis cells were treated with cadmium for 5 h under three different light conditions. We demonstrated that cadmium toxicity was enhanced with increasing growth light intensities due to increased cadmium uptake under higher light exposures, and the photoprotective mechanisms could not cope with cadmium and light stress under high light conditions. We also investigated Cd toxicity to Synechocystis adapted to three growth light intensities and subsequently shifted to different light intensity conditions to compare the effects of light regime shift on cadmium toxicity. We observed increased cadmium toxicity when the cells were transferred from low light to high light conditions. Interestingly, Synechocystis cells grown at high light intensities were more tolerant to cadmium than cells grown at low light intensities after the same light regime shift, due to the development of photoprotective mechanisms.
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Affiliation(s)
- Juan Du
- College of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, PR China
| | - Baosheng Qiu
- College of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, PR China
| | - Marcelo Pedrosa Gomes
- Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal do Paraná, Avenida Coronel Francisco H. dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, 81531-980, Curitiba, Paraná, Brazil
| | - Philippe Juneau
- Departement des Sciences Biologiques - GRIL-TOXEN, Ecotoxicology of Aquatic Microorganisms Laboratory, Université du Québec à Montréal, Succ. Centre-Ville, C.P. 8888, H3C 3P8, Montréal, Québec, Canada.
| | - Guozheng Dai
- College of Life Sciences, Central China Normal University, Wuhan, 430079, Hubei, PR China.
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24
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Gao M, Yang Y, Song Z. Effects of graphene oxide on cadmium uptake and photosynthesis performance in wheat seedlings. Ecotoxicol Environ Saf 2019; 173:165-173. [PMID: 30771660 DOI: 10.1016/j.ecoenv.2019.01.093] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 01/21/2019] [Accepted: 01/28/2019] [Indexed: 05/24/2023]
Abstract
Graphene oxide (GO) is extensively used in various fields because of its versatility. The presence of GO in the environment enhances the toxicity of toxicants or pollutants. Cadmium (Cd) and GO pollution is a problem in aquatic environment, which should be solved. We investigated the toxic effects of Cd on photosynthesis and oxidative stress in wheat seedlings in the presence of GO, by measuring seedling biomass, Cd content, photosynthesis, reactive oxygen species (ROS) level, antioxidant enzyme activities, and malondialdehyde (MDA) content. At low concentrations, GO alone had limited effects, but at concentrations > 20 mg L-1, seedlings were negatively affected. Under combined Cd-GO treatment, GO was significantly toxic at only 5 mg L-1 concentration, and increasing concentration significantly increased Cd accumulation and decreased biomass. The net photosynthetic rate, stomatal conductance, transpiration rate, primary maximum photochemical efficiency of photosystem II, actual quantum yield, photosynthetic electron transport rate, chlorophyll content, and ribulose-1,5-bisphosphate carboxylase/oxygenase concentration decreased significantly, whereas intercellular CO2 concentration increased significantly. These changes can be attributed to impairment of ROS level, antioxidant enzyme activities, and MDA level, and toxicity mechanisms are suggested to be due to oxidative stress. The resulting damage to the photosynthetic systems and structures likely contributed to the overall decrease in biomass.
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Affiliation(s)
- Minling Gao
- School of Environmental Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China; Stockbridge School of Agriculture, University of Masschusetts, Amherst, MA 01003, USA
| | - Yujuan Yang
- School of Environmental Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Zhengguo Song
- Agro-Environmental Protection Institute, Ministry of Agriculture of China, Tianjin 300191, China.
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Chi S, Qin Y, Xu W, Chai Y, Feng D, Li Y, Li T, Yang M, He Z. Differences of Cd uptake and expression of OAS and IRT genes in two varieties of ryegrasses. Environ Sci Pollut Res Int 2019; 26:13717-13724. [PMID: 29909534 DOI: 10.1007/s11356-018-2509-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
Pot experiment was conducted to study the difference of cadmium uptake and OAS and IRT genes' expression between the two ryegrass varieties under cadmium stress. The results showed that with the increase of cadmium levels, the dry weights of roots of the two ryegrass varieties, and the dry weights of shoots and plants of Abbott first increased and then decreased. When exposed to 75 mg kg-1 Cd, the dry weights of shoot and plant of Abbott reached the maximum, which increased by 11.13 and 10.67% compared with the control. At 75 mg kg-1 Cd, cadmium concentrations in shoot of the two ryegrass varieties were higher than the critical value of Cd hyperaccumulator (100 mg kg-1), 111.19 mg kg-1 (Bond), and 133.69 mg kg-1 (Abbott), respectively. The OAS gene expression in the leaves of the two ryegrass varieties showed a unimodal curve, which was up to the highest at the cadmium level of 150 mg kg-1, but fell back at high cadmium levels of 300 and 600 mg kg-1. The OAS gene expression in Bond and Abbott roots showed a bimodal curve. The OAS gene expression in Bond root and Abbott stem mainly showed a unimodal curve. The expression of IRT genes family in the leaves of ryegrass varieties was basically in line with the characteristics of unimodal curve, which was up to the highest at cadmium level of 75 or 150 mg kg-1, respectively. The IRT expression in the ryegrass stems showed characteristics of bimodal and unimodal curves, while that in the roots was mainly unimodal. The expression of OAS and IRT genes was higher in Bond than that in Abbott due to genotype difference between the two varieties. The expression of OAS and IRT was greater in leaves than that in roots and stems. Ryegrass tolerance to cadmium can be increased by increasing the expression of OAS and IRT genes in roots and stems, and transfer of cadmium from roots and stems to the leaves can be enhanced by increasing expression OAS and IRT in leaves.
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Affiliation(s)
- Sunlin Chi
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Yuli Qin
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Weihong Xu
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China.
| | - Yourong Chai
- College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China.
| | - Deyu Feng
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Yanhua Li
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Tao Li
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Mei Yang
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Zhangmi He
- College of Resources and Environmental Sciences, Southwest University, Chongqing, 400715, People's Republic of China
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26
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Haisel D, Cyrusová T, Vaněk T, Podlipná R. The effect of nanoparticles on the photosynthetic pigments in cadmium-zinc interactions. Environ Sci Pollut Res Int 2019; 26:4147-4151. [PMID: 30613887 DOI: 10.1007/s11356-018-04060-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
Heavy metal contamination, one of the greatest global problems, not only endangers humans and animals but also negatively affects plants. New trends, the production and industrial applications of metals in nanoforms, lead to release of large amounts of nanoparticles into the environment. However, the influence of nanoparticles on living organisms is not well understood. Cadmium is a heavy metal not essential for plants, and to its phytotoxicity also contributes its chemical similarity to zinc. It has been recorded that zinc at low concentrations reduces the toxicity of cadmium, but our results with ZnO nanoparticles did not proved it. In contrast, ZnO nanoparticles significantly increased the negative effect of cadmium, which was reflected mainly in changes in the content of photosynthetic pigments.
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Affiliation(s)
- Daniel Haisel
- Czech Academy of Sciences, Institute of Experimental Botany, Prague, Czech Republic
| | - Tereza Cyrusová
- Czech Academy of Sciences, Institute of Experimental Botany, Prague, Czech Republic
- Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Tomáš Vaněk
- Czech Academy of Sciences, Institute of Experimental Botany, Prague, Czech Republic
| | - Radka Podlipná
- Czech Academy of Sciences, Institute of Experimental Botany, Prague, Czech Republic.
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27
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Wu Y, Yuan Y, Yuan H, Zhang W, Zhang L. Predicting cadmium toxicity with the kinetics of phytochelatin induction in a marine diatom. Aquat Toxicol 2019; 207:101-109. [PMID: 30557755 DOI: 10.1016/j.aquatox.2018.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/19/2018] [Accepted: 12/09/2018] [Indexed: 06/09/2023]
Abstract
Phytochelatin (PC) synthesis is thought to be a rapid and specific response to metal exposure in marine phytoplankton, but its potential as a predictor of metal toxicity is far from conclusive. Thus this research examines the bioaccumulation, PC induction, and toxicity of Cadmium (Cd) in Thalassiosira weissflogii, a coastal diatom under varying nutrient conditions. Nitrogen limitation strongly inhibited Cd uptake and PC induction at the same [Cd2+] level, and increased metal sensitivity. Conversely, phosphorus limitation had little influence on Cd accumulation and PC induction, yet also enhanced metal effect on growth. Differential growth inhibitions were correlated with [Cd2+], intracellular Cd concentration, PC concentration, the kinetics of Cd uptake and PC induction, respectively. It was found that stronger interrelations existed between kinetic rates (both Cd uptake and PC synthesis) and Cd sensitivity than between the static concentrations (Cd and PC) and growth inhibition. Moreover, according to the calculated median inhibition concentration (IC50), median effective uptake rate of Cd, as well as median effective induction rate of PCs, the latter two showed the smallest variation when nutrients were varied (1.4-1.9 fold). Our study set out the first step toward considering the use of PC synthesis kinetics to predict metal toxicity for phytoplankton.
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Affiliation(s)
- Yun Wu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), School of Environmental Science and Engineering, Nanjing University of Information Science & Technology (NUIST), Nanjing, 210044, China; Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Yue Yuan
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), School of Environmental Science and Engineering, Nanjing University of Information Science & Technology (NUIST), Nanjing, 210044, China
| | - Hezhong Yuan
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), School of Environmental Science and Engineering, Nanjing University of Information Science & Technology (NUIST), Nanjing, 210044, China
| | - Wei Zhang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
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Wu S, Shi K, Hu C, Guo J, Tan Q, Sun X. Non-invasive microelectrode cadmium flux measurements reveal the decrease of cadmium uptake by zinc supply in pakchoi root (Brassica chinensis L.). Ecotoxicol Environ Saf 2019; 168:363-368. [PMID: 30391841 DOI: 10.1016/j.ecoenv.2018.10.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 06/08/2023]
Abstract
Zinc (Zn) possesses similar properties to cadmium (Cd) and inhibits Cd uptake in plants. To get more detailed mechanisms of Zn-inhibited Cd uptake in pakchoi, a hydroponic experiment was conducted to investigate the effects of various Zn levels on Cd concentrations, real time flux of Cd, expressions of genes related to Cd uptake under Cd exposure. The results showed that the Cd concentrations and Cd accumulations in pakchoi root decreased with increasing Zn levels, which were coincident with that real time Cd influx and net Cd influx of pakchoi root decreased with increasing Zn levels by non-invasive micro-test technology (NMT). Additionally, the expressions of Cd-related transporters including BcNRAMP5, BcIRT1 and BcMGT1 decreased with the increase of Zn levels under Cd exposure, especially BcIRT1 with the highest decreased rates. Furthermore, the expressions of these genes decreased gradually with the prolongation of Zn treated time under Cd toxicity. The results indicate that Zn inhibits Cd uptake by inhibition of the expressions of Cd-related transporters, especially BcIRT1 in pakchoi root.
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Affiliation(s)
- Songwei Wu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 China; Hubei Provincial Engineering Laboratory for New-Type Fertilizers, Huazhong Agricultural University, Wuhan 430070 China
| | - Kaili Shi
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 China; Hubei Provincial Engineering Laboratory for New-Type Fertilizers, Huazhong Agricultural University, Wuhan 430070 China
| | - Chengxiao Hu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 China; Hubei Provincial Engineering Laboratory for New-Type Fertilizers, Huazhong Agricultural University, Wuhan 430070 China
| | - Jilin Guo
- College of life Science, Xinjiang Normal University, Urumqi 830054 China
| | - Qiling Tan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 China; Hubei Provincial Engineering Laboratory for New-Type Fertilizers, Huazhong Agricultural University, Wuhan 430070 China
| | - Xuecheng Sun
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 China; Hubei Provincial Engineering Laboratory for New-Type Fertilizers, Huazhong Agricultural University, Wuhan 430070 China; Key Laboratory of Environment Remediation and Ecological Health, Zhejiang University, Ministry of Education, Hangzhou, China, 310058.
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29
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Tang L, Hamid Y, Gurajala HK, He Z, Yang X. Effects of CO 2 application and endophytic bacterial inoculation on morphological properties, photosynthetic characteristics and cadmium uptake of two ecotypes of Sedum alfredii Hance. Environ Sci Pollut Res Int 2019; 26:1809-1820. [PMID: 30456615 DOI: 10.1007/s11356-018-3680-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
Plant uptake of cadmium (Cd) is affected by soil and environmental conditions. In this study, hydroponic experiments were conducted to investigate the effects of elevated CO2 coupled with inoculated endophytic bacteria M002 on morphological properties, gas exchange, photosynthetic pigments, chlorophyll fluorescence, and Cd uptake of S. alfredii. The results showed that bio-fortification processes (elevated CO2 and/or inoculated with endophytic bacteria) significantly (p < 0.05) promoted growth patterns, improved photosynthetic characteristics and increased Cd tolerance of both ecotypes of S. alfredii, as compared to normal conditions. Net photosynthetic rate (Pn) in intact leaves of hyperaccumulating ecotype (HE) and non-hyperaccumulating ecotype (NHE) were increased by 73.93 and 32.90%, respectively at the low Cd (2 μM), 84.41 and 57.65%, respectively at the high Cd level (10 μM). Superposition treatment increased Cd concentration in shoots and roots of HE, by 50.87 and 82.12%, respectively at the low Cd and 46.75 and 88.92%, respectively at the high Cd level. Besides, superposition treatment declined Cd transfer factor of NHE, by 0.85% at non-Cd rate, 17.22% at the low Cd and 22.26% at the high Cd level. These results indicate that elevated CO2 coupled with endophytic bacterial inoculation may effectively improve phytoremediation efficiency of Cd-contaminated soils by hyperaccumulator, and alleviate Cd toxicity to non-hyperaccumulator ecotype of Sedum alfredii.
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Affiliation(s)
- Lin Tang
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Yasir Hamid
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Hanumanth Kumar Gurajala
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Zhenli He
- Institute of Food and Agricultural Sciences, Indian River Research and Education Center, University of Florida, Fort Pierce, FL, 34945, USA
| | - Xiaoe Yang
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
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Liu L, Li J, Yue F, Yan X, Wang F, Bloszies S, Wang Y. Effects of arbuscular mycorrhizal inoculation and biochar amendment on maize growth, cadmium uptake and soil cadmium speciation in Cd-contaminated soil. Chemosphere 2018; 194:495-503. [PMID: 29241123 DOI: 10.1016/j.chemosphere.2017.12.025] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/01/2017] [Accepted: 12/05/2017] [Indexed: 05/08/2023]
Abstract
Experiments conducted to understand how arbuscular mycorrhizal (AM) inoculation or biochar application affect plant growth and heavy metal uptake have thus far looked at single applications of either soil amendment. There is little evidence of their synergistic effects, in particular for plants grown in cadmium (Cd) contaminated soil. We conducted a mesocosm experiment to investigate the effect of AM inoculation (Glomus intraradices BEG 141) and/or wheat-straw biochar amendment on maize (Zea mays L. cv. Hongdan No. 897) growth, antioxidant enzymatic activities, and Cd uptake, as well as soil Cd speciation under applications of 0, 3, 6 mg Cd per kg soil. Applying either AM inoculant or biochar alone significantly increased maize growth and reduced Cd uptake. Furthermore, solo AM inoculation alleviating Cd stress more fully than biochar, in turn facilitating maize growth and decreasing soil Cd translocation into plant tissue. Still, solo biochar amendment was more effective at inducing soil alkalinization and contributing to Cd immobilization. Adding biochar together with AM inoculant significantly promoted fungal populations compared to a control. Amending soil with AM inoculant and biochar together produced the largest increase in maize growth and decrease in tissue Cd concentrations. This effect was additive, with 79.1% greater biomass, 51.42%, 82.91%, 43.96% higher activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and 50.06%, 67.19%, 58.04% and 76.19% lower Cd concentrations in roots, stems, leaves, and ears, respectively, at a 6 mg kg-1 Cd contamination rate. The combined treatment also had a synergistic effect on inducing soil alkalinization and causing Cd immobilization, and decreasing Cd phytoavailability and post-harvest transfer risks. These results suggest that AM inoculation in combination with biochar application may be applicable not only for maize production but also for phytostabilization of Cd-contaminated soil.
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Affiliation(s)
- Ling Liu
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471023 PR China; Department of Entomology & Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Jiwei Li
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471023 PR China.
| | - Feixue Yue
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471023 PR China.
| | - Xinwei Yan
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471023 PR China.
| | - Fayuan Wang
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471023 PR China.
| | - Sean Bloszies
- Department of Entomology & Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Yanfang Wang
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471023 PR China.
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Benáková M, Ahmadi H, Dučaiová Z, Tylová E, Clemens S, Tůma J. Effects of Cd and Zn on physiological and anatomical properties of hydroponically grown Brassica napus plants. Environ Sci Pollut Res Int 2017; 24:20705-20716. [PMID: 28714046 DOI: 10.1007/s11356-017-9697-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
Clarifying the connection between metal exposure and anatomical changes represents an important challenge for a better understanding of plant phytoextraction potential. A hydroponic screening experiment was carried out to evaluate the effects of combined interactions of Cd and Zn on mineral uptake (Mg, K, Ca, Na) and on the physiological and anatomical characteristics of Brassica napus L cv. Cadeli, Viking, and Navajo. Plants were exposed to 5 μM Cd (CdCl2), 10 μM Zn (ZnSO4), or both Cd + Zn, for 14 days. Cadmium exposure led to a significant reduction in root growth, shoot biomass, and chlorophyll content. After Cd-only and Cd + Zn treatment, primary root tips became thicker and pericycle cells were enlarged compared to the control and Zn-only treatment. No differences between metals were observed under UV excitation, where all treatments showed more intensive autofluorescence connected with lignin/suberin accumulation compared to control conditions. The highest concentrations of Cd and Zn were found in the roots of all tested plants, and translocation factors did not exceed the threshold of 1.0. The root mineral composition was not affected by any treatment. In the shoots, the Mg concentration slightly increased after Cd-only and Cd + Zn treatments, whereas Zn-only treatment caused a sharp decrease in Ca content. Slight increases in K were seen after the addition of Zn. Significantly higher concentrations of Na were induced by Cd- or Zn-only treatment.
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Affiliation(s)
- Martina Benáková
- Department of Biology, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03, Hradec Králové, Czech Republic.
| | - Hassan Ahmadi
- Department of Plant Physiology, University of Bayreuth, Bayreuth, Germany
| | - Zuzana Dučaiová
- Department of Biology, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03, Hradec Králové, Czech Republic
| | - Edita Tylová
- Department of Experimental Plant Biology, Charles University, Prague, Czech Republic
| | - Stephan Clemens
- Department of Plant Physiology, University of Bayreuth, Bayreuth, Germany
| | - Jiří Tůma
- Department of Biology, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03, Hradec Králové, Czech Republic
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Greger M, Kabir AH, Landberg T, Maity PJ, Lindberg S. Silicate reduces cadmium uptake into cells of wheat. Environ Pollut 2016; 211:90-7. [PMID: 26745394 DOI: 10.1016/j.envpol.2015.12.027] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 05/20/2023]
Abstract
Cadmium (Cd) is a health threat all over the world and high Cd content in wheat causes high Cd intake. Silicon (Si) decreases cadmium content in wheat grains and shoot. This work investigates whether and how silicate (Si) influences cadmium (Cd) uptake at the cellular level in wheat. Wheat seedlings were grown in the presence or absence of Si with or without Cd. Cadmium, Si, and iron (Fe) accumulation in roots and shoots was analysed. Leaf protoplasts from plants grown without Cd were investigated for Cd uptake in the presence or absence of Si using the fluorescent dye, Leadmium Green AM. Roots and shoots of plants subjected to all four treatments were investigated regarding the expression of genes involved in the Cd uptake across the plasma membrane (i.e. LCT1) and efflux of Cd into apoplasm or vacuole from the cytosol (i.e. HMA2). In addition, phytochelatin (PC) content and PC gene (PCS1) expression were analysed. Expression of iron and metal transporter genes (IRT1 and NRAMP1) were also analysed. Results indicated that Si reduced Cd accumulation in plants, especially in shoot. Si reduced Cd transport into the cytoplasm when Si was added both directly during the uptake measurements and to the growth medium. Silicate downregulated LCT1 and HMA2 and upregulated PCS1. In addition, Si enhanced PC formation when Cd was present. The IRT1 gene, which was downregulated by Cd was upregulated by Si in root and shoot facilitating Fe transport in wheat. NRAMP1 was similarly expressed, though the effect was limited to roots. This work is the first to show how Si influences Cd uptake on the cellular level.
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Affiliation(s)
- Maria Greger
- Department of Ecology, Environment and Plant Science, Stockholm University, 106 91 Stockholm, Sweden.
| | - Ahmad H Kabir
- Department of Botany, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Tommy Landberg
- Department of Ecology, Environment and Plant Science, Stockholm University, 106 91 Stockholm, Sweden
| | - Pooja J Maity
- Department of Ecology, Environment and Plant Science, Stockholm University, 106 91 Stockholm, Sweden
| | - Sylvia Lindberg
- Department of Ecology, Environment and Plant Science, Stockholm University, 106 91 Stockholm, Sweden
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Gutiérrez C, Hansen HK, Hernández P, Pinilla C. Biosorption of cadmium with brown macroalgae. Chemosphere 2015; 138:164-9. [PMID: 26066085 DOI: 10.1016/j.chemosphere.2015.06.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 04/21/2015] [Accepted: 06/01/2015] [Indexed: 05/23/2023]
Abstract
Sorption experiments for cadmium removal using two brown macroalgae Lessonia nigrescens and Durvillaea antarctica were carried out. Although both types of algae were capable of retaining cadmium, differences in their performance were observed. The optimum pH was 3.7±0.2, and to achieve the equilibrium, 5 days of contact time were necessary for both biosorbents. The maximum experimental uptake obtained was similar for the two biosorbents: 95.3 mg Cd g(-1) by D. antarctica and 109.5 mg Cd g(-1) by L. nigrescens. The Langmuir model described the equilibrium sorption isotherms very well for both biosorbents and the Lagergren pseudo primer order model described the sorption kinetics for L. nigrescens satisfactorily and the Ho and Mckay pseudo second order model for D. antarctica. It was found that cadmium uptake by D. antarctica was faster than by L. nigrescens.
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Affiliation(s)
- Claudia Gutiérrez
- Departamento de Ingenieria Quimica y Ambiental, Universidad Técnica Federico Santa Maria, Avenida España 1680, Valparaiso, Chile
| | - Henrik K Hansen
- Departamento de Ingenieria Quimica y Ambiental, Universidad Técnica Federico Santa Maria, Avenida España 1680, Valparaiso, Chile.
| | - Piroska Hernández
- Departamento de Ingenieria Quimica y Ambiental, Universidad Técnica Federico Santa Maria, Avenida España 1680, Valparaiso, Chile
| | - Carolina Pinilla
- Departamento de Ingenieria Quimica y Ambiental, Universidad Técnica Federico Santa Maria, Avenida España 1680, Valparaiso, Chile
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Wu Q, Su N, Cai J, Shen Z, Cui J. Hydrogen-rich water enhances cadmium tolerance in Chinese cabbage by reducing cadmium uptake and increasing antioxidant capacities. J Plant Physiol 2015; 175:174-82. [PMID: 25543863 DOI: 10.1016/j.jplph.2014.09.017] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 09/25/2014] [Accepted: 09/28/2014] [Indexed: 05/08/2023]
Abstract
The aim of the present paper was to understand the specific mechanism of hydrogen-rich water (HRW) in alleviating cadmium (Cd) toxicity in Chinese cabbage (Brassica campestris spp. chinensis L.). Our results showed that the addition of 50% saturation HRW significantly alleviated the Cd toxic symptoms, including the improvement of both root elongation and seedling growth inhibition. These responses were consistent with a significant decrease of Cd accumulation in roots and shoots, which was further confirmed by the histochemical staining. Molecular evidence illustrated that Cd-induced up-regulations of IRT1 and Nramp1 genes, responsible for Cd absorption, were blocked by HRW. By contrast, Cd-induced up-regulation of the HMA3 gene, which regulates Cd sequestration into the root vacuoles, was substantially strengthened by HRW. Furthermore, compared with those in Cd stress alone, the expressions of HMA2 and HMA4, which function in the transportation of Cd to xylem, were repressed by co-treatment with HRW. HRW enhanced the activities of antioxidant enzymes, including superoxide dismutase, guaiacol peroxidase, catalase and ascorbate peroxidase. These results were further confirmed by the alleviation of oxidative damage, as indicated by the decrease of thiobarbituric acid reactive substances (TBARS) and reactive oxygen species (ROS) production. Taken together, these results suggest that the improvement of Cd tolerance by HRW was associated with reduced Cd uptake and increased antioxidant defense capacities. Therefore, the application of HRW may be a promising strategy to improve Cd tolerance of Chinese cabbage.
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Affiliation(s)
- Qi Wu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiangtao Cai
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Javed MT, Lindberg S, Greger M. Cadmium uptake in Elodea canadensis leaves and its interference with extra- and intra-cellular pH. Plant Biol (Stuttg) 2014; 16:615-621. [PMID: 24016297 DOI: 10.1111/plb.12086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 07/03/2013] [Indexed: 06/02/2023]
Abstract
This study investigated cadmium (Cd) uptake in Elodea canadensis shoots under different photosynthetic conditions, and its effects on internal (cytosolic) and external pH. The plants were grown under photosynthetic (light) or non-photosynthetic (dark or in the presence of a photosynthetic inhibitor) conditions in the presence or absence of CdCl2 (0.5 μm) in a medium with a starting pH of 5.0. The pH-sensitive dye BCECF-AM was used to monitor cytosolic pH changes in the leaves. Cadmium uptake in protoplasts and leaves was detected with a Cd-specific fluorescent dye, Leadmium Green AM, and with atomic absorption spectrophotometry. During cultivation for 3 days without Cd, shoots of E. canadensis increased the pH of the surrounding water, irrespective of the photosynthetic conditions. This medium alkalisation was higher in the presence of CdCl2 . Moreover, the presence of Cd also increased the cation exchange capacity of the shoots. The total Cd uptake by E. canadensis shoots was independent of photosynthetic conditions. Protoplasts from plants exposed to 0.5 μm CdCl2 for 3 days did not exhibit significant change in cytosolic [Cd(2+)] or pH. However, exposure to CdCl2 for 7 days resulted in increased cytosolic [Cd(2+) ] as well as pH. The results suggest that E. canadensis subjected to a low CdCl2 concentration initially sequesters Cd into the apoplasm, but under prolonged exposure, Cd is transported into the cytosol and subsequently alters cytosolic pH. In contrast, addition of 10-50 μm CdCl2 directly to protoplasts resulted in immediate uptake of Cd into the cytosol.
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Affiliation(s)
- M T Javed
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden; Department of Botany, Government College University, Faisalabad, Pakistan
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