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Tisarum R, Sotesaritkul T, Pipatsitee P, Cha-Um K, Samphumphuang T, Singh HP, Cha-Um S. Toxicity, physiological, and morphological alterations of Indian camphorweed (Pluchea indica) in response to excess copper. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:7637-7649. [PMID: 37402936 DOI: 10.1007/s10653-023-01679-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 06/26/2023] [Indexed: 07/06/2023]
Abstract
Indian camphorweed (Pluchea indica (L.) Less.) is used as herbal tea due to the presence of volatile aromatic oils and several phytochemical compounds. The aim of this study was to assess the impact of copper (Cu) contamination on the physiology and morphology of P. indica, and the health risks associated with its consumption as tea. The cuttings of P. indica were subjected to 0 mM (control), 5 mM (low Cu), and 20 mM (excess Cu) of CuSO4 treatments for 1, 2, and 4 weeks. Thereafter, Cu contamination as well as physiological and morphological parameters were assessed. Cu accumulation was higher in the root tissues of plants (25.8 folds higher as compared to the leaves) grown under 20 mM CuSO4 for 4 weeks. This increased Cu accumulation resulted in the inhibition of root length, root fresh weight, and root dry weight. Cu concentration was found maximum (1.36 μg g-1 DW) in the leaf tissues under 20 mM Cu exposure for 4 weeks, with the highest target hazard quotient (THQ = 1.85), whereas Cu was not detected in control. Under exposure to 20 mM Cu treatment for 4 weeks, leaf greenness, maximum quantum yield of photosystem II, and photon yield of photosystem II diminished by 21.4%, 16.1%, and 22.4%, respectively, as compared to the control. Leaf temperature was increased by 2.5 °C, and the crop stress index (CSI) exceeded 0.6 when exposed to 20 mM Cu treatment for 2 and 4 weeks; however, the control had a CSI below 0.5. This led to a reduced transpiration rate and stomatal conductance. In addition, the net photosynthetic rate was also found sensitive to Cu treatment, which resulted in decreased shoot and root growth. Based on the key results, it can be suggested that P. indica herbal tea derived from the foliage of plants grown under a 5 mM Cu level (0.75 μg g-1 DW) with a target hazard quotient below one aligns with the recommended dietary intake of Cu in leafy vegetables. The study recommends choosing cuttings from plants with a small canopy as plant material in the greenhouse microclimates to validate the growth performance in the Cu-contaminated soil and simulate the natural shrub architecture and life cycle.
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Affiliation(s)
- Rujira Tisarum
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Thanyaporn Sotesaritkul
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Piyanan Pipatsitee
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Kwankhao Cha-Um
- Science Classrooms in University-Affiliated School Project (SCIUS), Thamasart University, Paholyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Thapanee Samphumphuang
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Harminder Pal Singh
- Department of Environment Studies, Faculty of Science, Panjab University, Chandigarh, 160014, India
| | - Suriyan Cha-Um
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand.
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Marques ACR, Tiecher TL, Brunetto G, Vendruscolo D, De Conti L, Ambrosini VG, Miotto A, Rosa DJ, da Silva ICB, Trentin E, Ferreira PAA, Jacques RJS, Pescador R, Comin JJ, Ceretta CA, de Melo GWB, Parent LÉ. Phytoremediation of Cu-contaminated vineyard soils in Brazil: A compendium of Brazilian pot studies. JOURNAL OF ENVIRONMENTAL QUALITY 2023; 52:1024-1036. [PMID: 37533339 DOI: 10.1002/jeq2.20503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 07/11/2023] [Indexed: 08/04/2023]
Abstract
Vineyard soils can be contaminated by copper (Cu) due to successive applications of fungicides and organic fertilizers. Soil remediation can be addressed by altering soil properties or selecting efficient Cu-extracting cover crops tolerant to Cu toxicity. Our objectives were to synthesize the Cu-extracting efficiency by plant species tested in Brazil, classify them according to Cu resistance to toxicity, and assess the effect of soil properties on attenuating Cu toxicity. We retrieved results from 41 species and cultivars, totaling 565 observations. Freshly added Cu varied between 50 and 600 mg Cu kg-1 of soil across studies. The partition of Cu removal between the above- and below-ground portions was scaled as a logistic variable to facilitate data synthesis. The data were analyzed using the Adaboost machine learning model. Model accuracy (predicted vs. actual values) reached R2 = 0.862 after relating species, cultivar, Cu addition, clay, SOM, pH, soil test P, and Cu as features to predict the logistic target variable. Tissue Cu concentration varied between 7 and 105 mg Cu kg-1 in the shoot and between 73 and 1340 mg Cu kg-1 in the roots. Among soil properties, organic matter and soil test Cu most influenced the accuracy of the model. Phaseolus vulgaris, Brassica juncea, Ricinus communis, Hordeum vulgare, Sorghum vulgare, Cajanus cajan, Solanum lycopersicum, and Crotolaria spectabilis were the most efficient Cu-extracting cover crops, as shown by positive values of the logistic variable (shoot removal > root removal). Those Cu-tolerant plants showed differential capacity to extract Cu in the long run.
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Affiliation(s)
| | - Tadeu Luis Tiecher
- Federal Institute of Education, Science and Technology of Rio Grande do Sul (IFRS), Porto Alegre, Brazil
| | - Gustavo Brunetto
- Department of Soil, Federal University of Santa Maria, Santa Maria, Brazil
| | - Diogo Vendruscolo
- Riograndense Association of Technical Assistance and Rural Extension Enterprises (EMATER / RS), Pinhal Grande, Brazil
| | - Lessandro De Conti
- Farroupilha Federal Institute of Education, Science and Technology, Santo Augusto, Brazil
| | | | - Alcione Miotto
- Federal Institute of Education, Science and Technology of Santa Catarina, São Miguel do Oeste, Brazil
| | - Daniel José Rosa
- Department of Biology, University of British Columbia, Kelowna, British Columbia, Canada
| | | | - Edicarla Trentin
- Department of Soil, Federal University of Santa Maria, Santa Maria, Brazil
| | | | | | - Rosete Pescador
- Department of Phytotechnics, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Jucinei José Comin
- Department of Phytotechnics, Federal University of Santa Catarina, Florianópolis, Brazil
| | | | | | - Léon-Étienne Parent
- Department of Soils and Agrifood Engineering, Université Laval, Québec, Quebec, Canada
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Eon P, Robert T, Goutouly JP, Aurelle V, Cornu JY. Cover crop response to increased concentrations of copper in vineyard soils: Implications for copper phytoextraction. CHEMOSPHERE 2023; 329:138604. [PMID: 37028730 DOI: 10.1016/j.chemosphere.2023.138604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/21/2023] [Accepted: 04/03/2023] [Indexed: 05/03/2023]
Abstract
The use of cover crops (CCs) in viticulture is threatened by the contamination of vineyard soils by copper (Cu). This study investigated the response of CCs to increased concentrations of Cu in soil as a way to assess their sensitivity to Cu and their Cu phytoextraction ability. Our first experiment used microplots to compare the effect of increasing soil Cu content from 90 to 204 mg kg-1 on the growth, Cu accumulation level, and elemental profile of six CC species (Brassicaceae, Fabaceae and Poaceae) commonly sown in vineyard inter-row. The second experiment quantified the amount of Cu exported by a mixture of CCs in vineyards with contrasted soil characteristics. Experiment 1 showed that increasing the soil Cu content from 90 to 204 mg kg-1 was detrimental to the growth of Brassicaceae and faba bean. The elemental composition of plant tissues was specific to each CC and almost no change in composition resulted from the increase in soil Cu content. Crimson clover was the most promising CC for Cu phytoextraction as it produced the most aboveground biomass, and, along with faba bean, accumulated the highest concentration of Cu in its shoots. Experiment 2 showed that the amount of Cu extracted by CCs depended on the availability of Cu in the topsoil and CC growth in the vineyard, and ranged from 25 to 166 g per hectare. Taken together, these results emphasize the fact that the use of CCs in vineyards may be jeopardised by the contamination of soils by Cu, and that the amount of Cu exported by CCs is not sufficiently high to offset the amount of Cu supplied by Cu-based fungicides. Recommendations are provided for maximizing the environmental benefits provided by CCs in Cu-contaminated vineyard soils.
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Affiliation(s)
- Pierre Eon
- ISPA, Bordeaux Sciences Agro, INRAE, 33140, Villenave d'Ornon, France.
| | - Thierry Robert
- ISPA, Bordeaux Sciences Agro, INRAE, 33140, Villenave d'Ornon, France
| | - Jean-Pascal Goutouly
- UEVB, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, F-33882, Villenave d'Ornon, France; EGFV, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, F-33882, Villenave d'Ornon, France
| | - Violette Aurelle
- Chambre d'Agriculture de Gironde, Vinopôle Bordeaux Aquitaine, 33295, Blanquefort Cedex, France
| | - Jean-Yves Cornu
- ISPA, Bordeaux Sciences Agro, INRAE, 33140, Villenave d'Ornon, France
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Seregin IV, Kozhevnikova AD. Nicotianamine: A Key Player in Metal Homeostasis and Hyperaccumulation in Plants. Int J Mol Sci 2023; 24:10822. [PMID: 37446000 DOI: 10.3390/ijms241310822] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/22/2023] [Accepted: 06/25/2023] [Indexed: 07/15/2023] Open
Abstract
Nicotianamine (NA) is a low-molecular-weight N-containing metal-binding ligand, whose accumulation in plant organs changes under metal deficiency or excess. Although NA biosynthesis can be induced in vivo by various metals, this non-proteinogenic amino acid is mainly involved in the detoxification and transport of iron, zinc, nickel, copper and manganese. This review summarizes the current knowledge on NA biosynthesis and its regulation, considers the mechanisms of NA secretion by plant roots, as well as the mechanisms of intracellular transport of NA and its complexes with metals, and its role in radial and long-distance metal transport. Its role in metal tolerance is also discussed. The NA contents in excluders, storing metals primarily in roots, and in hyperaccumulators, accumulating metals mainly in shoots, are compared. The available data suggest that NA plays an important role in maintaining metal homeostasis and hyperaccumulation mechanisms. The study of metal-binding compounds is of interdisciplinary significance, not only regarding their effects on metal toxicity in plants, but also in connection with the development of biofortification approaches to increase the metal contents, primarily of iron and zinc, in agricultural plants, since the deficiency of these elements in food crops seriously affects human health.
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Affiliation(s)
- Ilya V Seregin
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya St., 35, 127276 Moscow, Russia
| | - Anna D Kozhevnikova
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya St., 35, 127276 Moscow, Russia
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Xu Q, Qiu W, Lin T, Yang Y, Jiang Y. Cadmium tolerance in Elodea canadensis Michx: Subcellular distribution and metabolomic analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 256:114905. [PMID: 37060802 DOI: 10.1016/j.ecoenv.2023.114905] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 12/23/2022] [Accepted: 04/09/2023] [Indexed: 06/19/2023]
Abstract
The aquatic plant Elodea canadensis is considered a good candidate for ecotoxicological investigations. Cadmium (Cd) is a widespread contaminant in aquatic systems. In this study, to better elucidate the underlying tolerance mechanism and molecular impact of environmentally relevant Cd concentration in aquatic plants, subcellular distribution, chemical forms, and gas chromatography-mass spectrometry-based non-targeted metabolomics profiles were comprehensively analyzed in E. canadensis subjected to 0 and 10 µM Cd treatment for 5 d. Subcellular fractionation analysis of Cd-containing leaves showed that 67% of Cd was compartmentalized in cell wall followed by the soluble fraction (24 %) and organelles (9 %). The majority of Cd (90 %) was found in the extraction using 1 M NaCl. Metabolomic analysis using unsupervised principal component analyses and a supervised partial least squares discriminant analysis revealed clear differences in metabolic profiles between the two groups, demonstrating the metabolic effects of Cd. The 155 identified compounds altered by Cd were mainly from primary metabolism, including sugars, amino acids, organic acids, and their derivatives. Secondary metabolites such as polyphenols and phenolamides were also detected. The massive up-regulation of metabolites, including trehalose, proline, sarcosine, nicotianamine, putrescine, α-ketoglutaric acid, citric acid, and phytol might represent a detoxification mechanism. These findings highlighted the mechanistic strategies that E. canadensis employs to defend against Cd toxicity.
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Affiliation(s)
- Qinsong Xu
- College of Life Science, Nanjing Normal University, Nanjing 210023, China.
| | - Wenjing Qiu
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Tinting Lin
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Yeyuping Yang
- College of Life Science, Nanjing Normal University, Nanjing 210023, China
| | - Yuji Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Ecological Experimental Station of Red Soil, Chinese Academy of Sciences, Yingtan 335211, China.
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Bai S, Han X, Feng D. Shoot-root signal circuit: Phytoremediation of heavy metal contaminated soil. FRONTIERS IN PLANT SCIENCE 2023; 14:1139744. [PMID: 36890896 PMCID: PMC9987563 DOI: 10.3389/fpls.2023.1139744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
High concentrations of heavy metals in the environment will cause serious harm to ecosystems and human health. It is urgent to develop effective methods to control soil heavy metal pollution. Phytoremediation has advantages and potential for soil heavy metal pollution control. However, the current hyperaccumulators have the disadvantages of poor environmental adaptability, single enrichment species and small biomass. Based on the concept of modularity, synthetic biology makes it possible to design a wide range of organisms. In this paper, a comprehensive strategy of "microbial biosensor detection - phytoremediation - heavy metal recovery" for soil heavy metal pollution control was proposed, and the required steps were modified by using synthetic biology methods. This paper summarizes the new experimental methods that promote the discovery of synthetic biological elements and the construction of circuits, and combs the methods of producing transgenic plants to facilitate the transformation of constructed synthetic biological vectors. Finally, the problems that should be paid more attention to in the remediation of soil heavy metal pollution based on synthetic biology were discussed.
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Affiliation(s)
- Shiyan Bai
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Xiao Han
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Dan Feng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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7
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Nikolić D, Bosnić D, Samardžić J. Silicon in action: Between iron scarcity and excess copper. FRONTIERS IN PLANT SCIENCE 2023; 14:1039053. [PMID: 36818840 PMCID: PMC9935840 DOI: 10.3389/fpls.2023.1039053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Essential micronutrients belonging to the transition metals, such as Fe and Cu, are indispensable for plant growth and stress tolerance; however, when present in excess, they can become potentially dangerous producers of reactive oxygen species. Therefore, their homeostases must be strictly regulated. Both microelement deficiencies and elevated concentrations of heavy metals in the soil are global problems that reduce the nutritional value of crops and seriously affect human health. Silicon, a beneficial element known for its protective properties, has been reported to alleviate the symptoms of Cu toxicity and Fe deficiency stress in plants; however, we are still far from a comprehensive understanding of the underlying molecular mechanisms. Although Si-mediated mitigation of these stresses has been clearly demonstrated for some species, the effects of Si vary depending on plant species, growing conditions and experimental design. In this review, the proposed mechanistic models explaining the effect of Si are summarized and discussed. Iron and copper compete for the common metal transporters and share the same transport routes, hence, inadequate concentration of one element leads to disturbances of another. Silicon is reported to beneficially influence not only the distribution of the element supplied below or above the optimal concentration, but also the distribution of other microelements, as well as their molar ratios. The influence of Si on Cu immobilization and retention in the root, as well as Si-induced Fe remobilization from the source to the sink organs are of vital importance. The changes in cellular Cu and Fe localization are considered to play a crucial role in restoring homeostasis of these microelements. Silicon has been shown to stimulate the accumulation of metal chelators involved in both the mobilization of deficient elements and scavenging excess heavy metals. Research into the mechanisms of the ameliorative effects of Si is valuable for reducing mineral stress in plants and improving the nutritional value of crops. This review aims to provide a thorough and critical overview of the current state of knowledge in this field and to discuss discrepancies in the observed effects of Si and different views on its mode of action.
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He H, Zhang D, Gao J. Bioaccumulation and physiological changes in the fruiting body of Agaricus bisporus (Large) sing in response to cadmium. Sci Rep 2022; 12:20079. [PMID: 36418499 PMCID: PMC9684502 DOI: 10.1038/s41598-022-24561-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 11/17/2022] [Indexed: 11/25/2022] Open
Abstract
The bioremediation of heavy metals contaminated soils with macrofungi is a new and promising approach; hence Agaricus bisporus (Large) sing has potentially shown accumulating ability to Cd contamination. This study focused on the tolerance response by A. bisporus to different contents of Cd in the closed cup and the flat stage of fruiting body development. The contents of Cd, soluble protein, sugar, low molecular weight organic acids (LMWOAs), and antioxidant activity were investigated. The bioaccumulation factor and transfer factor results revealed that Cd accumulated in the cap of A. bisporus more than that in the stipe with the highest content being 18.38 mg kg-1 dry weight at the closed cup stage under 414.28 mg kg-1 Cd stress. High Cd content stress increased soluble protein, proline, and malonaldehyde contents at both stages; while higher peroxidase, catalase, ascorbic acid peroxidase activities, and LMWOAs contents were only recorded at the closed cup stage. On the other hand, Superoxide dismutase activities and soluble sugar content showed a complex trend. Overall, these results have successfully established that A. bisporus could resort to modulating its metabolism to avoid the destructive effects of Cd stress and could successfully accumulate Cd in the soil, which is a promising prospect for the remediation of Cd-contaminated soils.
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Affiliation(s)
- Haiyan He
- grid.464376.40000 0004 1759 6007College of Geography and Resources Science, Neijiang Normal University, Neijiang, People’s Republic of China
| | - Dan Zhang
- grid.9227.e0000000119573309Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, People’s Republic of China
| | - Jianing Gao
- grid.9227.e0000000119573309Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, People’s Republic of China
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Phung LD, Kumar A, Watanabe T. CuO nanoparticles in irrigation wastewater have no detrimental effect on rice growth but may pose human health risks. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157602. [PMID: 35896133 DOI: 10.1016/j.scitotenv.2022.157602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/15/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
The possibility of metal-based nanoparticles (NPs) being released into agricultural soils via sewage systems has raised widespread concern about their negative effects on crop plants, soils, and potential risks to human health via the food chain. The objectives of this study were to (i) determine the effect of CuO NPs in irrigation water on plant growth and Cu accumulation in a rice-soil system using continuous sub-irrigation with treated wastewater (CSI), and (ii) assess the Cu exposure and potential health risk associated with rice consumption. CuO NPs were examined in treated municipal wastewater (TWW) at environmentally acceptable concentrations (0, 0.02, 0.2, and 2.0 mg Cu L-1), allowing for effluent discharge and/or crop irrigation reuse. Low CuO NP concentrations in TWW had no adverse effect on plant growth, yield, or grain quality. Cu accumulation significantly increased in various parts of rice plants and paddy soils at 2.0 mg Cu L-1. CuO NPs had no discernible effect on rice plants when compared to CuSO4 at 0.2 mg Cu L-1. The estimated daily intake of Cu derived from inadvertent consumption of Cu-contaminated rice (by CuO NPs in TWW) for young children aged 0-6 years exceeded the oral reference dose for toxicity. Overall, we found no acute toxicity of CuO NPs in TWW to rice plants, but significant Cu accumulation in grains. This implies that there is a high risk of human health problems associated with rice that was intensively irrigated with TWW containing CuO NPs.
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Affiliation(s)
- Luc Duc Phung
- Faculty of Agriculture, Yamagata University, 1-23 Wakaba-machi, Tsuruoka, Yamagata 997-8555, Japan; Center for Foreign Languages and International Education, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Ha Noi 12406, Viet Nam.
| | - Arun Kumar
- Department of Civil Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Toru Watanabe
- Faculty of Agriculture, Yamagata University, 1-23 Wakaba-machi, Tsuruoka, Yamagata 997-8555, Japan
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Naz F, Hamayun M, Rauf M, Arif M, Afzal Khan S, Ud-Din J, Gul H, Hussain A, Iqbal A, Kim HY, Lee IJ. Molecular mechanism of Cu metal and drought stress resistance triggered by Porostereum spadiceum AGH786 in Solanum lycopersicum L. FRONTIERS IN PLANT SCIENCE 2022; 13:1029836. [PMID: 36438115 PMCID: PMC9685319 DOI: 10.3389/fpls.2022.1029836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Rapid industrialization and global warming have threatened the plants with multiple abiotic stresses, such as heavy metals and drought stress. For crop cultivation, the conventional approach of cleaning the soils by excavation is very costly and not feasible for large scale. Establishing toxin-free and drought-resistant crops is a major challenge in the environment under natural and anthropogenic pressure. In the past decades, copper contamination of agricultural land has become an emerging concern. For dry land reclamation, several new strategies, including bioremediation (phytoremediation and microbial remediation), have been used. Owing to the potential of Cu hyperaccumulators, the current project aims to enhance the drought tolerance and the phytoremediation potential of Solanum lycopersicum L. with the inoculation of copper and 12% polyethylene glycol (PEG)-induced drought stress-tolerant endophytic fungus Porostereum spadiceum AGH786 under the combined stress of copper heavy metal and PEG-induced drought stress. When S. lycopersicum L. was watered with individual stress of copper (Cu) concentration (400 ppm) in the form of copper sulfate (CuSO4.5H2O), 12% PEG-induced drought stress and the combined stress of both negatively affected the growth attributes, hormonal, metabolic, and antioxidant potential, compared with control. However, the multistress-resistant AGH786 endophytic fungus ameliorated the multistress tolerance response in S. lycopersicum L. by positively affecting the growth attributes, hormonal, metabolic, and antioxidant potential, and by restricting the root-to-shoot translocation of Cu and inducing its sequestration in the root tissues of affected plants. AGH786-associated plants exhibited a reduction in the severity of copper (Cu) and drought stress, with higher levels of SlCOPT (Cu transporters) and SlMT (metallothionine) gene expressions in root and shoot tissues, indicating that AGH786 contributed to resistance to copper metal toxicity and drought stress in the host S. lycopersicum L.
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Affiliation(s)
- Falak Naz
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Muhammad Hamayun
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Mamoona Rauf
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Muhammad Arif
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Sumera Afzal Khan
- Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar, Pakistan
| | - Jalal Ud-Din
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Humaira Gul
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Anwar Hussain
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Amjad Iqbal
- Department of Food Technology, Abdul Wali Khan University, Mardan, Pakistan
| | - Ho-Youn Kim
- Smart Farm Research Center, Korea Institute of Science and Technology, Gangneung, South Korea
| | - In-Jung Lee
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
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Ge J, Tao J, Zhao J, Wu Z, Zhang H, Gao Y, Tian S, Xie R, Xu S, Lu L. Transcriptome analysis reveals candidate genes involved in multiple heavy metal tolerance in hyperaccumulator Sedum alfredii. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 241:113795. [PMID: 35753274 DOI: 10.1016/j.ecoenv.2022.113795] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/04/2022] [Accepted: 06/17/2022] [Indexed: 06/15/2023]
Abstract
Sedum alfredii Hance is a perennial herb native to China that can particularly be found in regions with abandoned Pb/Zn mines. It is a Cd/Zn hyperaccumulator that is highly tolerant to Pb, Cu, Ni, and Mn, showing potential for phytoremediation of soils contaminated with multiple heavy metals. A better understanding of how this species responds to different heavy metals would advance the phytoremediation efficiency. In this study, transcriptomic regulation of S. alfredii roots after Cd, Zn, Pb, and Cu exposure was analyzed to explore the candidate genes involved in multi-heavy metal tolerance. Although Zn and Cd, Pb and Cu had similar distribution patterns in S. alfredii, distinct expression patterns were exhibited among these four metal treatments, especially about half of the differentially expressed genes were upregulated under Cu treatment, suggesting that it utilizes distinctive and flexible strategies to cope with specific metal stress. Most unigenes regulated by Cu were enriched in catalytic activity, whereas the majority of unigenes regulated by Pb had unknown functions, implying that S. alfredii may have a unique strategy coping with Pb stress different from previous cognition. The unigenes that were co-regulated by multiple heavy metals exhibited functions of antioxidant substances, antioxidant enzymes, transporters, transcription factors, and cell wall components. These metal-induced responses at the transcriptional level in S. alfredii were highly consistent with those at the physiological level. Some of these genes have been confirmed to be related to heavy metal absorption and detoxification, and some were found to be related to heavy metal tolerance for the first time in this study, like Metacaspase-1 and EDR6. These results provide a theoretical basis for the use of genetic engineering technology to modify plants by enhancing multi-metal tolerance to promote phytoremediation efficiency.
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Affiliation(s)
- Jun Ge
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jingyu Tao
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jianqi Zhao
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhiying Wu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hewan Zhang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuxiao Gao
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shengke Tian
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Ruohan Xie
- Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Shengyang Xu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lingli Lu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou 310058, China.
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12
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Kińska K, Cruzado-Tafur E, Parailloux M, Torró L, Lobinski R, Szpunar J. Speciation of metals in indigenous plants growing in post-mining areas: Dihydroxynicotianamine identified as the most abundant Cu and Zn ligand in Hypericum laricifolium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:151090. [PMID: 34688754 DOI: 10.1016/j.scitotenv.2021.151090] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/14/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
Ag, As, Cu, Pb and Zn were found to be the principal metallic contaminants of a post-mining area of Peru (Hualgayoc, Cajamarca). Study of metal distribution amongst roots, stems, and leaves of four indigenous hypertolerant plant species, Arenaria digyna, Puya sp., Hypericum laricifolium, Nicotiana thyrsiflora indicated significant translocation of Zn (0.6 < TF ≤ 10.0) and Cu (0.4 < TF ≤ 6.5) into aerial plant organs and substantial water-extractable fraction (20-60%) of these metals, except for A. digyna (root and stems). A study of the metal speciation by ultrahigh-performance size-exclusion (fast-SEC) and hydrophilic ion interaction (HILIC) liquid chromatography with dual ICP (inductively coupled plasma) and electrospray (ESI) Orbitrap MS detection revealed the presence of nicotianamine and deoxymugineic acid copper and zinc complexes in roots, stem and leaves of N. thyrsiflora and Puya sp., and nicotianamine alone in A. digyna. A previously unreported compound, dihydroxy-nicotianamine was identified as the most abundant Cu and Zn ligand in H. laricifolium. The presence of arsenobetaine and an arsenosugar was confirmed by ESI MS. Ag and Pb were hardly translocated to leaves and were found as high molecular species; one of the Pb-containing species co-eluted in fast-SEC-ICP MS with rhamnogalacturonan-II-Pb complex commonly found in in the walls of plants.
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Affiliation(s)
- Katarzyna Kińska
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux, Pau, France.
| | - Edith Cruzado-Tafur
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux, Pau, France; Geological Engineering Program, Faculty of Sciences and Engineering, Pontifical Catholic University of Peru (PUCP), Av. Universitaria 180, San Miguel, Lima 15088, Peru
| | - Maroussia Parailloux
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux, Pau, France
| | - Lisard Torró
- Geological Engineering Program, Faculty of Sciences and Engineering, Pontifical Catholic University of Peru (PUCP), Av. Universitaria 180, San Miguel, Lima 15088, Peru
| | - Ryszard Lobinski
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux, Pau, France; Department of Analytical Chemistry, Warsaw Technical University, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Joanna Szpunar
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux, Pau, France
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13
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Sytar O, Ghosh S, Malinska H, Zivcak M, Brestic M. Physiological and molecular mechanisms of metal accumulation in hyperaccumulator plants. PHYSIOLOGIA PLANTARUM 2021; 173:148-166. [PMID: 33219524 DOI: 10.1111/ppl.13285] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/19/2020] [Accepted: 11/17/2020] [Indexed: 05/19/2023]
Abstract
Most of the heavy metals (HMs), and metals/metalloids are released into the nature either by natural phenomenon or anthropogenic activities. Being sessile organisms, plants are constantly exposed to HMs in the environment. The metal non-hyperaccumulating plants are susceptible to excess metal concentrations. They tend to sequester metals in their root vacuoles by forming complexes with metal ligands, as a detoxification strategy. In contrast, the metal-hyperaccumulating plants have adaptive intrinsic regulatory mechanisms to hyperaccumulate or sequester excess amounts of HMs into their above-ground tissues rather than accumulating them in roots. They have unique abilities to successfully carry out normal physiological functions without showing any visible stress symptoms unlike metal non-hyperaccumulators. The unique abilities of accumulating excess metals in hyperaccumulators partly owes to constitutive overexpression of metal transporters and ability to quickly translocate HMs from root to shoot. Various metal ligands also play key roles in metal hyperaccumulating plants. These metal hyperaccumulating plants can be used in metal contaminated sites to clean-up soils. Exploiting the knowledge of natural populations of metal hyperaccumulators complemented with cutting-edge biotechnological tools can be useful in the future. The present review highlights the recent developments in physiological and molecular mechanisms of metal accumulation of hyperaccumulator plants in the lights of metal ligands and transporters. The contrasting mechanisms of metal accumulation between hyperaccumulators and non-hyperaccumulators are thoroughly compared. Moreover, uses of different metal hyperaccumulators for phytoremediation purposes are also discussed in detail.
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Affiliation(s)
- Oksana Sytar
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia
- Department of Plant Biology, Institute of Biology and Medicine, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Supriya Ghosh
- Department of Botany, University of Kalyani, Kalyani, Nadia-741235, India
| | - Hana Malinska
- Department of Biology, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Marek Zivcak
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic
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14
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Marmiroli M, Pagano L, Rossi R, De La Torre-Roche R, Lepore GO, Ruotolo R, Gariani G, Bonanni V, Pollastri S, Puri A, Gianoncelli A, Aquilanti G, d'Acapito F, White JC, Marmiroli N. Copper Oxide Nanomaterial Fate in Plant Tissue: Nanoscale Impacts on Reproductive Tissues. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:10769-10783. [PMID: 34308629 DOI: 10.1021/acs.est.1c01123] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A thorough understanding of the implications of chronic low-dose exposure to engineered nanomaterials through the food chain is lacking. The present study aimed to characterize such a response in Cucurbita pepo L. (zucchini) upon exposure to a potential nanoscale fertilizer: copper oxide (CuO) nanoparticles. Zucchini was grown in soil amended with nano-CuO, bulk CuO (100 mg Kg-1), and CuSO4 (320 mg Kg-1) from germination to flowering (60 days). Nano-CuO treatment had no impact on plant morphology or growth nor pollen formation and viability. The uptake of Cu was comparable in the plant tissues under all treatments. RNA-seq analyses on vegetative and reproductive tissues highlighted common and nanoscale-specific components of the response. Mitochondrial and chloroplast functions were uniquely modulated in response to nanomaterial exposure as compared with conventional bulk and salt forms. X-ray absorption spectroscopy showed that the Cu local structure changed upon nano-CuO internalization, suggesting potential nanoparticle biotransformation within the plant tissues. These findings demonstrate the potential positive physiological, cellular, and molecular response related to nano-CuO application as a plant fertilizer, highlighting the differential mechanisms involved in the exposure to Cu in nanoscale, bulk, or salt forms. Nano-CuO uniquely stimulates plant response in a way that can minimize agrochemical inputs to the environment and therefore could be an important strategy in nanoenabled agriculture.
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Affiliation(s)
- Marta Marmiroli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, Parma 43124, Italy
| | - Luca Pagano
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, Parma 43124, Italy
| | - Riccardo Rossi
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, Parma 43124, Italy
| | - Roberto De La Torre-Roche
- The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | | | - Roberta Ruotolo
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, Parma 43124, Italy
| | - Gianluca Gariani
- Elettra, Sincrotrone Trieste, Strada Statale 14 km 1635 in AREA Science Park, Trieste 34149, Italy
| | - Valentina Bonanni
- Elettra, Sincrotrone Trieste, Strada Statale 14 km 1635 in AREA Science Park, Trieste 34149, Italy
| | - Simone Pollastri
- Elettra, Sincrotrone Trieste, Strada Statale 14 km 1635 in AREA Science Park, Trieste 34149, Italy
| | - Alessandro Puri
- CNR-IOM-OGG c/o ESRF-The European Synchrotron, 71 Avenue des Martyrs CS 40220, Grenoble Cédex 9 F-38043, France
| | - Alessandra Gianoncelli
- Elettra, Sincrotrone Trieste, Strada Statale 14 km 1635 in AREA Science Park, Trieste 34149, Italy
| | - Giuliana Aquilanti
- Elettra, Sincrotrone Trieste, Strada Statale 14 km 1635 in AREA Science Park, Trieste 34149, Italy
| | - Francesco d'Acapito
- CNR-IOM-OGG c/o ESRF-The European Synchrotron, 71 Avenue des Martyrs CS 40220, Grenoble Cédex 9 F-38043, France
| | - Jason C White
- The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Nelson Marmiroli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, Parma 43124, Italy
- Consorzio Interuniversitario Nazionale per le Scienze Ambientali (CINSA), University of Parma, Parma 43124, Italy
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15
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Carrillo JT, Borthakur D. Methods for metal chelation in plant homeostasis: Review. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 163:95-107. [PMID: 33826996 DOI: 10.1016/j.plaphy.2021.03.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 03/20/2021] [Indexed: 05/01/2023]
Abstract
Metal uptake, transport and storage in plants depend on specialized ligands with closely related functions. Individual studies differing by species, nutrient availability, tissue type, etc. are not comprehensive enough to understand plant metal homeostasis in its entirety. A thorough review is required that distinguishes the role of ligands directly involved in chelation from the myriad of plant responses to general stress. Distinguishing between the functions of metal chelating compounds is the primary focus of this review; reactive oxygen species mediation and other aspects of metal homeostasis are also discussed. High molecular weight ligands (polysaccharides, phytochelatin, metallothionein), low molecular weight ligands (nicotianamine, histidine, secondary metabolites) and select studies which demonstrate the complex nature of plant metal homeostasis are explored.
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Affiliation(s)
- James T Carrillo
- University of Hawaii at Manoa, Department of Molecular Biology and Bioengineering, 1955 East-West Road, Agricultural Sciences 218, Honolulu, HI, 96822, USA.
| | - Dulal Borthakur
- University of Hawaii at Manoa, Department of Molecular Biology and Bioengineering, 1955 East-West Road, Agricultural Sciences 218, Honolulu, HI, 96822, USA.
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16
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Ge J, Wang H, Lin J, Tian S, Zhao J, Lin X, Lu L. Nickel tolerance, translocation and accumulation in a Cd/Zn co-hyperaccumulator plant Sedum alfredii. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:123074. [PMID: 32768837 DOI: 10.1016/j.jhazmat.2020.123074] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/23/2020] [Accepted: 05/26/2020] [Indexed: 06/11/2023]
Abstract
Multi-elements hyperaccumulators are of high scientific interest to be applied in remediation of mix-contaminated soils. Sedum alfredii is a well-known Cd/Zn co-hyperaccumulator with high Pb and Cu tolerance. This study investigated the ability of the hyperaccumulating ecotype (HE) S. alfredii to tolerate and accumulate Ni. Differed from the non-hyperaccumulating ecotype (NHE), HE plants grew healthy after 50 μM Ni exposure for 4 weeks. The HE plants translocated up to 40 % Ni to the shoots under high Ni stress and accumulated >3000 and 200 mg kg-1 Ni in roots and shoots, respectively. Micro-XRF image showed that Ni was highly restricted within the HE stem and leaf vascular bundles, especially the xylem tissues. The HE roots were of high Ni tolerance, showing much less pronounced Ni-induced phytotoxicity as compared with the NHEs. Ni-induced O2- was observed in the apoplastic part of HE root cells, but both Ni and the induced O2- were highly accumulated in the sensitive zone (root cap, meristem, and cylinder) of NHE roots. These results suggest that although low Ni mobility out of vascular tissues limits the metal accumulation in stems and leaves, HE S. alfredii is highly tolerant towards Ni stress by metal homeostasis in root cells.
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Affiliation(s)
- Jun Ge
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China
| | - Haixin Wang
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China
| | - Jiayu Lin
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China
| | - Shengke Tian
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Jianqi Zhao
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China
| | - Xianyong Lin
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Lingli Lu
- Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University, College of Environmental & Resource Science), Ministry of Education, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou, 310058, China.
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17
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Xv L, Ge J, Tian S, Wang H, Yu H, Zhao J, Lu L. A Cd/Zn Co-hyperaccumulator and Pb accumulator, Sedum alfredii, is of high Cu tolerance. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114401. [PMID: 32234645 DOI: 10.1016/j.envpol.2020.114401] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 03/14/2020] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
High sensitivity towards Cu toxicity is problematic when using some hyperaccumulator plants for phytoremediation of soils with mixed contamination of Cu. Sedum alfredii, a Cd/Zn co-hyperaccumulator and Pb accumulator, is widely used for remediation of Cd, Zn, and Pb co-contaminated soils in China. In this paper, the tolerance and accumulation ability of S. alfredii towards Cu stress and its potential for phytoremediation of multi-metal polluted soils have been studied. Both the hyperaccumulating ecotype (HE) and non-hyperaccumulating ecotype (NHE) of S. alfredii accumulated high Cu in the roots and translocated minimal Cu to the shoots, and Cu in the stems and leaves mostly restricted in the vascular tissues (phloem zone). The HE plants, however, exhibited high Cu resistance with stimulated lateral root growth and increased chlorophyll content under 10 μM Cu treatment. XANES analysis showed that Cu in HE roots comprised Cu2+ (46.7%), Cu-histidine (35.2%) and Cu-cell wall (18.1%). The NHE under Cu stress showed decreased biomass, reduced leaf chlorophyll content, altered root architecture, and higher Cu localized to root cell wall as compared with the HEs. Potted HE plants thrived six months in multi-metal contaminated soils including 3897 mg kg-1 available Cu. In conclusion, HE S alfredii is highly tolerant toward Cu due to metal homeostasis in root cells. Therefore, this plant has great potential to remediate Zn, Cd, and Pb contaminated soils those also contain high levels of Cu.
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Affiliation(s)
- Lingling Xv
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Jun Ge
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Shengke Tian
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Haixin Wang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Haiyue Yu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Jianqi Zhao
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Lingli Lu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resource Science, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition, Zhejiang University, Hangzhou 310058, China.
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18
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Mijovilovich A, Morina F, Bokhari SN, Wolff T, Küpper H. Analysis of trace metal distribution in plants with lab-based microscopic X-ray fluorescence imaging. PLANT METHODS 2020; 16:82. [PMID: 32523612 PMCID: PMC7278123 DOI: 10.1186/s13007-020-00621-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 05/23/2020] [Indexed: 05/27/2023]
Abstract
BACKGROUND Many metals are essential for plants and humans. Knowledge of metal distribution in plant tissues in vivo contributes to the understanding of physiological mechanisms of metal uptake, accumulation and sequestration. For those studies, X-rays are a non-destructive tool, especially suited to study metals in plants. RESULTS We present microfluorescence imaging of trace elements in living plants using a customized benchtop X-ray fluorescence machine. The system was optimized by additional detector shielding to minimize stray counts, and by a custom-made measuring chamber to ensure sample integrity. Protocols of data recording and analysis were optimised to minimise artefacts. We show that Zn distribution maps of whole leaves in high resolution are easily attainable in the hyperaccumulator Noccaea caerulescens. The sensitivity of the method was further shown by analysis of micro- (Cu, Ni, Fe, Zn) and macronutrients (Ca, K) in non-hyperaccumulating crop plants (soybean roots and pepper leaves), which could be obtained in high resolution for scan areas of several millimetres. This allows to study trace metal distribution in shoots and roots with a wide overview of the object, and thus avoids making conclusions based on singular features of tiny spots. The custom-made measuring chamber with continuous humidity and air supply coupled to devices for imaging chlorophyll fluorescence kinetic measurements enabled direct correlation of element distribution with photosynthesis. Leaf samples remained vital even after 20 h of X-ray measurements. Subtle changes in some of photosynthetic parameters in response to the X-ray radiation are discussed. CONCLUSIONS We show that using an optimized benchtop machine, with protocols for measurement and quantification tailored for plant analyses, trace metal distribution can be investigated in a reliable manner in intact, living plant leaves and roots. Zinc distribution maps showed higher accumulation in the tips and the veins of young leaves compared to the mesophyll tissue, while in the older leaves the distribution was more homogeneous.
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Affiliation(s)
- Ana Mijovilovich
- Biology Centre of the Czech Academy of Sciences, Department of Plant Biophysics & Biochemistry, Institute of Plant Molecular Biology, Branišovská 1160/31, 370 05 Ceske Budejovice, Czech Republic
| | - Filis Morina
- Biology Centre of the Czech Academy of Sciences, Department of Plant Biophysics & Biochemistry, Institute of Plant Molecular Biology, Branišovská 1160/31, 370 05 Ceske Budejovice, Czech Republic
| | - Syed Nadeem Bokhari
- Biology Centre of the Czech Academy of Sciences, Department of Plant Biophysics & Biochemistry, Institute of Plant Molecular Biology, Branišovská 1160/31, 370 05 Ceske Budejovice, Czech Republic
| | - Timo Wolff
- Bruker Nano GmbH, Am Studio 2D, 12489 Berlin, Germany
| | - Hendrik Küpper
- Biology Centre of the Czech Academy of Sciences, Department of Plant Biophysics & Biochemistry, Institute of Plant Molecular Biology, Branišovská 1160/31, 370 05 Ceske Budejovice, Czech Republic
- Department of Experimental Plant Biology, University of South Bohemia, Branišovská 1160/31, 370 05 Ceske Budejovice, Czech Republic
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19
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Zadel U, Nesme J, Michalke B, Vestergaard G, Płaza GA, Schröder P, Radl V, Schloter M. Changes induced by heavy metals in the plant-associated microbiome of Miscanthus x giganteus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 711:134433. [PMID: 31818597 DOI: 10.1016/j.scitotenv.2019.134433] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/11/2019] [Accepted: 09/11/2019] [Indexed: 06/10/2023]
Abstract
Miscanthus x giganteus is a high biomass producing plant with tolerance to heavy metals. This makes Miscanthus interesting to be used for phytoremediation of heavy metal contaminated areas coupled with energy production. Since plant performance in metal polluted areas is impaired, their growth and phytoremediation effect can be improved with bacterial assistance. To identify positive and negative responders of M. x giganteus associated microbiome influenced by Cd, Pb and Zn stress compared to non-contaminated controls, we designed a greenhouse experiment. Structure of the bacterial community in three rhizocompartments, namely rhizosphere, rhizoplane and root endosphere was analysed using an isolation independent molecular approach based on 16S rRNA gene barcoding. Furthermore, quantitative PCR (qPCR) was used for bacterial biomass estimation. Our results indicated that biomass and total bacterial diversity in rhizosphere, rhizoplane and root endosphere did not significantly change despite of substantial root uptake of heavy metals. Overall, we detected 6621 OTUs, from which 171 were affected by metal addition. Whereas Streptomyces and Amycolatopsis taxa were negatively affected by the heavy metal treatment in endosphere, taxa assigned to Luteolibacter in rhizosphere and rhizoplane (log2 fold change 1.9-4.1) and Micromonospora in endosphere (log2 fold change 10.2) were found to be significantly enriched and highly abundant (0.1-3.7% relative abundance) under heavy metal stress. Those taxa might be of key importance for M. x giganteus performance under heavy metal pollution and might be interesting candidates for the development of new bioinocula in the future to promote plant growth and phytoremediation in heavy metal contaminated soils.
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Affiliation(s)
- Urška Zadel
- Helmholtz Zentrum München, Research Unit Comparative Microbiome Analysis, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Joseph Nesme
- Helmholtz Zentrum München, Research Unit Comparative Microbiome Analysis, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; University of Copenhagen, Institute for Microbiology, Universitetsparken 15, 2100 Copenhagen, Denmark.
| | - Bernhard Michalke
- Helmholtz Zentrum München, Research Unit Analytical Biogeochemistry, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Gisle Vestergaard
- Helmholtz Zentrum München, Research Unit Comparative Microbiome Analysis, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; Technical University of Denmark, Section of Bioinformatics, Department of Health Technology, 2800 Kgs. Lyngby, Denmark.
| | - Grażyna A Płaza
- Institute for Ecology of Industrial Areas, Department of Environmental Microbiology, 6 Kossutha Street, 40-844 Katowice, Poland.
| | - Peter Schröder
- Helmholtz Zentrum München, Research Unit Comparative Microbiome Analysis, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Viviane Radl
- Helmholtz Zentrum München, Research Unit Comparative Microbiome Analysis, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Michael Schloter
- Helmholtz Zentrum München, Research Unit Comparative Microbiome Analysis, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; Technical University of Munich, Chair for Soil Ecology, Emil-Ramann-Straße 2, 85354 Freising, Germany.
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Cui JL, Zhao YP, Chan TS, Zhang LL, Tsang DCW, Li XD. Spatial distribution and molecular speciation of copper in indigenous plants from contaminated mine sites: Implication for phytostabilization. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:121208. [PMID: 31563672 DOI: 10.1016/j.jhazmat.2019.121208] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 07/20/2019] [Accepted: 09/10/2019] [Indexed: 05/10/2023]
Abstract
Contaminated mining sites require ecological restoration work, of which phytoremediation using appropriate plant species is an attractive option. Our present study is focused on one typical contaminated mine site with indigenous plant cover. The X-ray absorption near edge structure (XANES) analysis indicated that Cu (the major contaminant) was primarily associated with goethite (adsorbed fraction), with a small amount of Cu oxalate-like species (organic fraction) in mine affected soil. With growth of plant species like Miscanthus floridulus and Stenoloma chusanum, the Cu-oxalate like organic species in rhizosphere soil significantly increased, with corresponding decrease in Cu-goethite. In the root cross-section of Miscanthus floridulus, synchrotron-based micro-X-ray fluorescence (μ-XRF) microscopy and micro-XANES results indicated that most Cu was sequestered around the root surface/epidermis, primarily forming Cu alginate-like species as a Cu-tolerance mechanism. From the root epidermis to the cortex and vascular bundle, more Cu(I)-glutathione was observed, suggesting reductive detoxification ability of Cu(II) to Cu(I) during the transport of Cu in the root. The observation of Cu-histidine in root internal cell layers showed another Cu detoxification pathway based on coordinating amino ligands. Miscanthus floridulus showed ability to accumulate phosphorous and nitrogen nutrients in rhizosphere and may be an option for in situ phytostabilization of metals in contaminated mining area.
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Affiliation(s)
- Jin-Li Cui
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Yan-Ping Zhao
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan
| | - Li-Li Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201214, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Xiang-Dong Li
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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21
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Ogunkunle CO, Bornmann B, Wagner R, Fatoba PO, Frahm R, Lützenkirchen-Hecht D. Copper uptake, tissue partitioning and biotransformation evidence by XANES in cowpea (Vigna unguiculata L) grown in soil amended with nano-sized copper particles. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.enmm.2019.100231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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22
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Bosnić D, Bosnić P, Nikolić D, Nikolić M, Samardžić J. Silicon and Iron Differently Alleviate Copper Toxicity in Cucumber Leaves. PLANTS (BASEL, SWITZERLAND) 2019; 8:E554. [PMID: 31795296 PMCID: PMC6963465 DOI: 10.3390/plants8120554] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/19/2019] [Accepted: 11/20/2019] [Indexed: 11/17/2022]
Abstract
Copper (Cu) toxicity in plants may lead to iron (Fe), zinc (Zn) and manganese (Mn) deficiencies. Here, we investigated the effect of Si and Fe supply on the concentrations of micronutrients and metal-chelating amino acids nicotianamine (NA) and histidine (His) in leaves of cucumber plants exposed to Cu in excess. Cucumber (Cucumis sativus L.) was treated with 10 µM Cu, and additional 100 µM Fe or/and 1.5 mM Si for five days. High Cu and decreased Zn, Fe and Mn concentrations were found in Cu treatment. Additional Fe supply had a more pronounced effect in decreasing Cu accumulation and improving the molar ratio between micronutrients as compared to the Si supply. However, the simultaneous supply of Fe and Si was the most effective treatment in alleviation of Cu-induced deficiency of Fe, Zn and Mn. Additional Fe supply increased the His but not NA concentration, while Si supply significantly increased both NA and His whereby the NA:Cu and His:Cu molar ratios exceeded the control values indicating that Si recruits Cu-chelation to achieve Cu tolerance. In conclusion, Si-mediated alleviation of Cu toxicity was directed toward Cu tolerance while Fe-alleviative effect was due to a dramatic decrease in Cu accumulation.
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Affiliation(s)
- Dragana Bosnić
- Laboratory for Plant Molecular Biology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia; (D.B.); (D.N.)
| | - Predrag Bosnić
- Department of Plant Nutrition, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia; (P.B.); (M.N.)
| | - Dragana Nikolić
- Laboratory for Plant Molecular Biology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia; (D.B.); (D.N.)
| | - Miroslav Nikolić
- Department of Plant Nutrition, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia; (P.B.); (M.N.)
| | - Jelena Samardžić
- Department of Plant Nutrition, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia; (P.B.); (M.N.)
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23
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Cui JL, Zhao YP, Lu YJ, Chan TS, Zhang LL, Tsang DCW, Li XD. Distribution and speciation of copper in rice (Oryza sativa L.) from mining-impacted paddy soil: Implications for copper uptake mechanisms. ENVIRONMENT INTERNATIONAL 2019; 126:717-726. [PMID: 30878867 DOI: 10.1016/j.envint.2019.02.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 02/11/2019] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
Long term mining activities can cause significant metal pollution in the environment, thereby showing potential risk to the paddy field. Elucidating the interfacial processes of trace metals from contaminated paddy soil to rice within the rhizosphere can provide important information on metal biogeochemistry and food safety. The current study aims to explore the spatial distribution and molecular speciation of Cu from rhizosphere to rice plant in a mining-impacted paddy soil, and reveal the possible uptake mechanisms. X-ray absorption near edge structure (XANES) analysis indicated that Cu was primarily associated with iron oxide and sulfide in soil with a minor proportion of organic complexed species. In the rice samples, Cu showed much higher concentrations in the roots than the shoots, as most Cu was sequestered in the root surface and epidermis (primarily in the form of C/N ligands bound Cu species), rather than root xylem, as identified by micro X-ray fluorescence (μ-XRF) imaging coupling with μ-XANES. By contrast, in the root xylem, thiol-S bound Cu(I) complex was observed, representing the reduced product of Cu(II) by thiol-S ligands in rice root. The absorbed Cu was probably transported from the root to the aerial part as C/N ligand bound Cu complex such as Cu-histidine like species, which was observed in the root xylem. The large retention capacity and reduction of Cu(II) in rice root alleviated Cu toxicity to rice, which was beneficial for food safety (e.g., lower concentration of Cu in rice grains). These findings showed for the first time that the uptake mechanisms by rice from field contaminated sites, which shed light on Cu detoxification process and potential remediation strategies.
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Affiliation(s)
- Jin-Li Cui
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Yan-Ping Zhao
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Ying-Jui Lu
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Li-Li Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Xiang-Dong Li
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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Shi W, Zhang Y, Chen S, Polle A, Rennenberg H, Luo ZB. Physiological and molecular mechanisms of heavy metal accumulation in nonmycorrhizal versus mycorrhizal plants. PLANT, CELL & ENVIRONMENT 2019; 42:1087-1103. [PMID: 30375657 DOI: 10.1111/pce.13471] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/26/2018] [Accepted: 10/26/2018] [Indexed: 06/08/2023]
Abstract
Uptake, translocation, detoxification, and sequestration of heavy metals (HMs) are key processes in plants to deal with excess amounts of HM. Under natural conditions, plant roots often establish ecto- and/or arbuscular-mycorrhizae with their fungal partners, thereby altering HM accumulation in host plants. This review considers the progress in understanding the physiological and molecular mechanisms involved in HM accumulation in nonmycorrhizal versus mycorrhizal plants. In nonmycorrhizal plants, HM ions in the cells can be detoxified with the aid of several chelators. Furthermore, HMs can be sequestered in cell walls, vacuoles, and the Golgi apparatus of plants. The uptake and translocation of HMs are mediated by members of ZIPs, NRAMPs, and HMAs, and HM detoxification and sequestration are mainly modulated by members of ABCs and MTPs in nonmycorrhizal plants. Mycorrhizal-induced changes in HM accumulation in plants are mainly due to HM sequestration by fungal partners and improvements in the nutritional and antioxidative status of host plants. Furthermore, mycorrhizal fungi can trigger the differential expression of genes involved in HM accumulation in both partners. Understanding the molecular mechanisms that underlie HM accumulation in mycorrhizal plants is crucial for the utilization of fungi and their host plants to remediate HM-contaminated soils.
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Affiliation(s)
- Wenguang Shi
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Yuhong Zhang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Shaoliang Chen
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Andrea Polle
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
- Forest Botany and Tree Physiology, University of Goettingen, 37077, Göttingen, Germany
| | - Heinz Rennenberg
- Institute for Forest Sciences, University of Freiburg, 79110, Freiburg, Germany
| | - Zhi-Bin Luo
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
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Kolbas A, Kolbas N, Marchand L, Herzig R, Mench M. Morphological and functional responses of a metal-tolerant sunflower mutant line to a copper-contaminated soil series. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:16686-16701. [PMID: 29611120 DOI: 10.1007/s11356-018-1837-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 03/19/2018] [Indexed: 06/08/2023]
Abstract
The potential use of a metal-tolerant sunflower mutant line for biomonitoring Cu phytoavailability, Cu-induced soil phytotoxicity, and Cu phytoextraction was assessed on a Cu-contaminated soil series (13-1020 mg Cu kg-1) obtained by fading a sandy topsoil from a wood preservation site with a similar uncontaminated soil. Morphological and functional plant responses as well as shoot, leaf, and root ionomes were measured after a 1-month pot experiment. Hypocotyl length, shoot and root dry weight (DW) yields, and leaf area gradually decreased as soil Cu exposure rose. Their dose-response curves (DRC) plotted against indicators of Cu exposure were generally well fitted by sigmoidal curves. The half-maximal effective concentration (EC50) of morphological parameters ranged between 203 and 333 mg Cu kg-1 soil, corresponding to 290-430 μg Cu L-1 in the soil pore water, and 20 ± 5 mg Cu kg-1 DW in the shoots. The EC10 for shoot Cu concentration (13-15 mg Cu kg-1 DW) coincided to 166 mg Cu kg-1 soil. Total chlorophyll content and total antioxidant capacity (TAC) were early biomarkers (EC10: 23 and 51 mg Cu kg-1 soil). Their DRC displayed a biphasic response. Photosynthetic pigment contents, e.g., carotenoids, correlated with TAC. Ionome was changed in Cu-stressed roots, shoots, and leaves. Shoot Cu removal peaked roughly at 280 μg Cu L-1 in the soil pore water.
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Affiliation(s)
- Aliaksandr Kolbas
- BIOGECO, INRA, Univ. Bordeaux, Bât. B2, allée G. St-Hilaire, CS50023, F-33615, Pessac cedex, France
- Brest State University named after A.S. Pushkin, Boulevard of Cosmonauts, 21, 224016, Brest, Belarus
| | - Natallia Kolbas
- Brest State University named after A.S. Pushkin, Boulevard of Cosmonauts, 21, 224016, Brest, Belarus
| | - Lilian Marchand
- BIOGECO, INRA, Univ. Bordeaux, Bât. B2, allée G. St-Hilaire, CS50023, F-33615, Pessac cedex, France
| | - Rolf Herzig
- Phytotech Foundation, Quartiergasse 12, 3013, Berne, Switzerland
| | - Michel Mench
- BIOGECO, INRA, Univ. Bordeaux, Bât. B2, allée G. St-Hilaire, CS50023, F-33615, Pessac cedex, France.
- INRA, UMR BIOGECO 1202, Diversity and Functioning of Communities, University of Bordeaux, Bât. B2, allée G. St-Hilaire, CS50023, F-33615, Pessac cedex, France.
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26
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Bartoli F, Royer M, Coinchelin D, Le Thiec D, Rose C, Robin C, Echevarria G. Multiscale and age-dependent leaf nickel in the Ni-hyperaccumulator Leptoplax emarginata. Ecol Res 2018. [DOI: 10.1007/s11284-018-1594-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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27
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Kopittke PM, Wang P, Lombi E, Donner E. Synchrotron-based X-Ray Approaches for Examining Toxic Trace Metal(loid)s in Soil-Plant Systems. JOURNAL OF ENVIRONMENTAL QUALITY 2017; 46:1175-1189. [PMID: 29293828 DOI: 10.2134/jeq2016.09.0361] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Elevated levels of trace metal(loid)s reduce plant growth, both in soils contaminated by industrial activities and in acid agricultural soils. Although the adverse effects of trace metal(loid)s have long been recognized, there remains much unknown both about their behavior in soils, their toxicity to plants, and the mechanisms that plants use to tolerate elevated concentrations. Synchrotron-based approaches are being utilized increasingly in soil-plant systems to examine toxic metal(loid)s. In the present review, brief consideration is given to the theory of synchrotron radiation. Thereafter, we review the use of synchrotron-based approaches for the examination of various trace metal(loid)s in soil-plant systems, including aluminum, chromium, manganese, cobalt, nickel, copper, zinc, arsenic, selenium, and cadmium. Within the context of this review, X-ray absorption spectroscopy (XAS) and X-ray fluorescence microscopy (μ-XRF) are of particular interest. These techniques can provide in situ analyses of the distribution and speciation of metal(loid)s in soil-plant systems. The information presented here serves not only to understand the behavior of trace metals in soil-plant systems, but also to provide examples of the potential applications of synchrotron radiation that can be used to advantage in other studies.
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28
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Drzewiecka K, Mleczek M, Gąsecka M, Magdziak Z, Budka A, Chadzinikolau T, Kaczmarek Z, Goliński P. Copper and nickel co-treatment alters metal uptake and stress parameters of Salix purpurea×viminalis. JOURNAL OF PLANT PHYSIOLOGY 2017; 216:125-134. [PMID: 28614755 DOI: 10.1016/j.jplph.2017.04.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 04/10/2017] [Accepted: 04/11/2017] [Indexed: 06/07/2023]
Abstract
Simultaneous treatment of Salix purpurea×viminalis with copper (Cu2+) and nickel (Ni2+) altered metal phytoextraction rates in favor of leaves. Still, metal translocation patters remained unaffected (roots≈rods>>leaves≥shoots), reaching ∼20 and 14.5mgkg-1 dry weight in roots for Cu and Ni, respectively. Biometric parameters revealed overall growth inhibition correlated with Cu content in leaves, thus proving its negative effect on photosynthesis. Metal toxicity was strongly affirmed in the case of roots (∼90% loss of root biomass at 3mM), rather than in the above-ground organs. Plant treatment accelerated the accumulation of soluble carbohydrates, phenolics including salicylic acid and glutathione in Salix leaves. However, significant differences in plant reactions to the applied metals were noted. Metal accumulation in leaves was correlated with soluble sugars and elevated glutathione, and also with total phenolics content, in the case of Cu and Ni, respectively. Glutathione synthesis was induced by both metals, and correlated with salicylic acid in leaves of Ni-treated plants.
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Affiliation(s)
- Kinga Drzewiecka
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625 Poznań, Poland
| | - Mirosław Mleczek
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625 Poznań, Poland.
| | - Monika Gąsecka
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625 Poznań, Poland
| | - Zuzanna Magdziak
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625 Poznań, Poland
| | - Anna Budka
- Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland
| | - Tamara Chadzinikolau
- Department of Plant Physiology, Poznań University of Life Sciences, Wołyńska 35, 60-625 Poznań, Poland
| | - Zygmunt Kaczmarek
- Institute of Plant Genetics, Polish Academy of Science, Strzeszyńska 34, 60-679 Poznań, Poland
| | - Piotr Goliński
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625 Poznań, Poland
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29
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Rodionova MV, Zharmukhamedov SK, Karacan MS, Venedik KB, Shitov AV, Tunç T, Mamaş S, Kreslavski VD, Karacan N, Klimov VV, Allakhverdiev SI. Evaluation of new Cu(II) complexes as a novel class of inhibitors against plant carbonic anhydrase, glutathione reductase, and photosynthetic activity in photosystem II. PHOTOSYNTHESIS RESEARCH 2017; 133:139-153. [PMID: 28497193 DOI: 10.1007/s11120-017-0392-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 04/28/2017] [Indexed: 06/07/2023]
Abstract
Increasing inefficiency of production of important agricultural plants raises one of the biggest problems in the modern world. Herbicide application is still the best method of weed management. Traditional herbicides blocking only one of the plant metabolic pathways is ineffective due to the rapid growth of herbicide-resistant weeds. The synthesis of novel compounds effectively suppressing several metabolic processes, and therefore achieving the synergism effect would serve as the alternative approach to weed problem. For this reason, recently, we synthesized a series of nine novel Cu(II) complexes and four ligands, characterized them with different analyses techniques, and carried out their primary evaluation as inhibitors of photosynthetic electron transfer in spinach thylakoids (design, synthesis, and evaluation of a series of Cu(II) based metal-organic complexes as possible inhibitors of photosynthesis, J Photochem Photobiol B, submitted). Here, we evaluated in vitro inhibitory potency of these agents against: photochemistry and carbonic anhydrase activity of photosystem II (PSII); α-carbonic anhydrase from bovine erythrocytes; as well as glutathione reductase from chloroplast and baker's yeast. Our results show that all Cu(II) complexes excellently inhibit glutathione reductase and PSII carbonic anhydrase activity. Some of them also decently inhibit PSII photosynthetic activity.
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Affiliation(s)
- Margarita V Rodionova
- Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow, Russia, 127276
| | - Sergei K Zharmukhamedov
- Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, Pushchino, Moscow Region, Russia, 142290
| | - Mehmet Sayım Karacan
- Department of Chemistry, Science Faculty, Gazi University, Teknikokullar, Ankara, Turkey
| | - Kubra Begum Venedik
- Department of Chemistry, Science Faculty, Gazi University, Teknikokullar, Ankara, Turkey
| | - Alexandr V Shitov
- Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, Pushchino, Moscow Region, Russia, 142290
| | - Turgay Tunç
- Department of Chemistry and Process Engineering, Faculty of Engineering-Architecture, Ahi Evran University, Kirsehir, Turkey
| | - Serhat Mamaş
- Department of Chemistry, Science Faculty, Gazi University, Teknikokullar, Ankara, Turkey
| | - Vladimir D Kreslavski
- Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow, Russia, 127276
- Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, Pushchino, Moscow Region, Russia, 142290
| | - Nurcan Karacan
- Department of Chemistry, Science Faculty, Gazi University, Teknikokullar, Ankara, Turkey.
| | - Vyacheslav V Klimov
- Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, Pushchino, Moscow Region, Russia, 142290
| | - Suleyman I Allakhverdiev
- Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow, Russia, 127276.
- Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, Pushchino, Moscow Region, Russia, 142290.
- Department of Plant Physiology, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow, Russia, 119991.
- Bionanotechnology Laboratory, Institute of Molecular Biology and Biotechnology, Azerbaijan National Academy of Sciences, Baku, Azerbaijan.
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30
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Bayçu G, Gevrek-Kürüm N, Moustaka J, Csatári I, Rognes SE, Moustakas M. Cadmium-zinc accumulation and photosystem II responses of Noccaea caerulescens to Cd and Zn exposure. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:2840-2850. [PMID: 27838905 DOI: 10.1007/s11356-016-8048-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 11/03/2016] [Indexed: 05/03/2023]
Abstract
A population of the metallophyte Noccaea (Thlaspi) caerulescens originating from a Zn-enriched area at Røros Copper Mine (Norway) was studied. N. caerulescens tolerance to accumulate Cd and Zn was evaluated in hydroponic experiments by chlorophyll fluorescence imaging analysis. In the field-collected N. caerulescens mother plants, Zn shoot concentrations were above Zn hyperaccumulation threshold while, in hydroponic experiments under 40-μM Cd exposure, shoot Cd concentrations were clearly above Cd hyperaccumulation threshold. Cadmium ions and, to a less extent, Zn were mainly retained in the roots. Exposure to Cd enhanced Zn translocation to the shoot, while decreased significant total Ca2+ uptake, suggesting that Cd uptake occurs through Ca2+ transporters. Nevertheless, it increased Ca2+ translocation to the leaf, possibly for photoprotection of photosystem II (PSII). Exposure to 800 μM Zn or 40 μM Cd resulted in increased Fe3+ uptake suggesting that in N. caerulescens, Cd uptake does not take place through the pathway of Fe3+ uptake and that conditions that lead to Cd and Zn accumulation in plants may also favor Fe accumulation. Despite the significant high toxicity levels of Zn and Cd in leaves, under Zn and Cd exposure, respectively, the allocation of absorbed light energy at PSII did not differ compared to controls. The results showed that N. caerulescens keep Cd and Zn concentrations in the mesophyll cells in non-toxic forms for PSII and that the increased Ca and Fe accumulation in leaves alleviates the toxicity effects. Chlorophyll fluorescence imaging revealed that PSII of N. caerulescens resisted better the phytotoxic effects of 20 times higher Zn than Cd exposure concentration. Overall, it is concluded that the use of chlorophyll fluorescence imaging constitutes a promising basis for investigating heavy metal tolerance of plants.
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Affiliation(s)
- Gülriz Bayçu
- Division of Botany, Department of Biology, Faculty of Science, Istanbul University, 34134, Istanbul, Turkey
| | - Nurbir Gevrek-Kürüm
- Division of Botany, Department of Biology, Faculty of Science, Istanbul University, 34134, Istanbul, Turkey
| | - Julietta Moustaka
- Department of Botany, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece
- Department of Biology, University of Crete, Voutes University Campus, 700 13, Heraklion, Crete, Greece
| | - István Csatári
- Division of Botany, Department of Biology, Faculty of Science, Istanbul University, 34134, Istanbul, Turkey
| | - Sven Erik Rognes
- Department of Biosciences, University of Oslo, 0316, Oslo, Norway
| | - Michael Moustakas
- Division of Botany, Department of Biology, Faculty of Science, Istanbul University, 34134, Istanbul, Turkey.
- Department of Botany, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
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Zhao L, Huang Y, Hu J, Zhou H, Adeleye AS, Keller AA. (1)H NMR and GC-MS Based Metabolomics Reveal Defense and Detoxification Mechanism of Cucumber Plant under Nano-Cu Stress. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:2000-10. [PMID: 26751164 DOI: 10.1021/acs.est.5b05011] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Because copper nanoparticles are being increasingly used in agriculture as pesticides, it is important to assess their potential implications for agriculture. Concerns have been raised about the bioaccumulation of nano-Cu and their toxicity to crop plants. Here, the response of cucumber plants in hydroponic culture at early development stages to two concentrations of nano-Cu (10 and 20 mg/L) was evaluated by proton nuclear magnetic resonance spectroscopy ((1)H NMR) and gas chromatography-mass spectrometry (GC-MS) based metabolomics. Changes in mineral nutrient metabolism induced by nano-Cu were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Results showed that nano-Cu at both concentrations interferes with the uptake of a number of micro- and macro-nutrients, such as Na, P, S, Mo, Zn, and Fe. Metabolomics data revealed that nano-Cu at both levels triggered significant metabolic changes in cucumber leaves and root exudates. The root exudate metabolic changes revealed an active defense mechanism against nano-Cu stress: up-regulation of amino acids to sequester/exclude Cu/nano-Cu; down-regulation of citric acid to reduce the mobilization of Cu ions; ascorbic acid up-regulation to combat reactive oxygen species; and up-regulation of phenolic compounds to improve antioxidant system. Thus, we demonstrate that nontargeted (1)H NMR and GC-MS based metabolomics can successfully identify physiological responses induced by nanoparticles. Root exudates metabolomics revealed important detoxification mechanisms.
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Affiliation(s)
- Lijuan Zhao
- Bren School of Environmental Science and Management, University of California , Santa Barbara, California 93106-5131, United States
- University of California , Center for Environmental Implications of Nanotechnology, Santa Barbara, California 93106, United States
| | - Yuxiong Huang
- Bren School of Environmental Science and Management, University of California , Santa Barbara, California 93106-5131, United States
- University of California , Center for Environmental Implications of Nanotechnology, Santa Barbara, California 93106, United States
| | - Jerry Hu
- Materials Research Laboratory, University of California , Santa Barbara, California 93106-5050, United States
| | - Hongjun Zhou
- Neuroscience Research Institute and Molecular, Cellular and Developmental Biology, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | - Adeyemi S Adeleye
- Bren School of Environmental Science and Management, University of California , Santa Barbara, California 93106-5131, United States
- University of California , Center for Environmental Implications of Nanotechnology, Santa Barbara, California 93106, United States
| | - Arturo A Keller
- Bren School of Environmental Science and Management, University of California , Santa Barbara, California 93106-5131, United States
- University of California , Center for Environmental Implications of Nanotechnology, Santa Barbara, California 93106, United States
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Abstract
Metal toxicity in plants is still a global problem for the environment, agriculture and ultimately human health.
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Affiliation(s)
- Hendrik Küpper
- Biology Center of the Czech Academy of Sciences
- Institute of Plant Molecular Biology
- Department of Plant Biophysics & Biochemistry
- 370 05 České Budějovice, Czech Republic
- University of South Bohemia
| | - Elisa Andresen
- Biology Center of the Czech Academy of Sciences
- Institute of Plant Molecular Biology
- Department of Plant Biophysics & Biochemistry
- 370 05 České Budějovice, Czech Republic
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Kang W, Bao J, Zheng J, Hu H, Du J. Distribution and chemical forms of copper in the root cells of castor seedlings and their tolerance to copper phytotoxicity in hydroponic culture. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:7726-34. [PMID: 25563834 DOI: 10.1007/s11356-014-4030-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 12/19/2014] [Indexed: 06/04/2023]
Abstract
The subcellular localization and chemical forms of copper in castor (Ricinus communis L.) seedlings grown in hydroponic nutrient solution were identified by chemical extraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The wild castor seeds were harvested from an abandoned copper mine in Tonglu Mountain, Daye City of Hubei Province, China. The results revealed that (1) the seedlings grew naturally in MS liquid medium with 40.00 mg kg(-1) CuSO4, in which the seedling growth rate and biomass index were 0.14 and 1.23, respectively, which were the highest values among all the treatments. The copper content in castor seedlings increased along with elevated CuSO4 concentration in the medium, reaching a maximum value of 16 570.12 mg kg(-1)(DW) when exposed to 60.00 mg L(-1) CuSO4, where 91.31% of the copper was accumulated in roots. (2) The copper existed in various chemical forms in the roots of the castor seedlings. Copper of 67.66% was extracted from the components of cell walls, such as exchangeable acidic polar compounds, cellulose and lignin, protein and pectin, and less concentrated in cell cytoplasm and nuclei. (3) Furthermore, the root cell walls were thickened when the castor seedlings exposed to CuSO4, with a large amount of high-density electron bodies, attached to the thickened cell walls. In the cell walls, most copper was bound to the carboxyl (-COOH) and hydroxyl (-OH) groups of acidic polar compounds, cellulose, hemicellulose, and polysaccharides. The conclusion showed that castor exhibited a strong tolerance to copper, the copper were accumulated mainly in the root cell, the root cell walls of castor were the major location of patience and detoxification in copper stress.
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Affiliation(s)
- Wei Kang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430070, People's Republic of China,
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Deng C, Pan X, Wang S, Zhang D. Cu(2+) inhibits photosystem II activities but enhances photosystem I quantum yield of Microcystis aeruginosa. Biol Trace Elem Res 2014; 160:268-75. [PMID: 24920130 DOI: 10.1007/s12011-014-0039-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 06/03/2014] [Indexed: 10/25/2022]
Abstract
Responses of photosystem I and II activities of Microcystis aeruginosa to various concentrations of Cu(2+) were simultaneously examined using a Dual-PAM-100 fluorometer. Cell growth and contents of chlorophyll a were significantly inhibited by Cu(2+). Photosystem II activity [Y(II)] and electron transport [rETRmax(II)] were significantly altered by Cu(2+). The quantum yield of photosystem II [Y(II)] decreased by 29 % at 100 μg L(-1) Cu(2+) compared to control. On the contrary, photosystem I was stable under Cu(2+) stress and showed an obvious increase of quantum yield [Y(I)] and electron transport [rETRmax(I)] due to activation of cyclic electron flow (CEF). Yield of cyclic electron flow [Y(CEF)] was enhanced by 17 % at 100 μg L(-1) Cu(2+) compared to control. The contribution of linear electron flow to photosystem I [Y(II)/Y(I)] decreased with increasing Cu(2+) concentration. Yield of cyclic electron flow [Y(CEF)] was negatively correlated with the maximal photosystem II photochemical efficiency (F v/F m). In summary, photosystem II was the major target sites of toxicity of Cu(2+), while photosystem I activity was enhanced under Cu(2+) stress.
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Affiliation(s)
- Chunnuan Deng
- Key Lab of Plateau Lake Ecology and Global Change, College of Tourism and Geographic Science, Yunnan Normal University, Kunming, 650500, China
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Collin B, Doelsch E, Keller C, Cazevieille P, Tella M, Chaurand P, Panfili F, Hazemann JL, Meunier JD. Evidence of sulfur-bound reduced copper in bamboo exposed to high silicon and copper concentrations. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2014; 187:22-30. [PMID: 24418975 DOI: 10.1016/j.envpol.2013.12.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 12/13/2013] [Accepted: 12/23/2013] [Indexed: 06/03/2023]
Abstract
We examined copper (Cu) absorption, distribution and toxicity and the role of a silicon (Si) supplementation in the bamboo Phyllostachys fastuosa. Bamboos were maintained in hydroponics for 4 months and submitted to two different Cu (1.5 and 100 μm Cu(2+)) and Si (0 and 1.1 mM) concentrations. Cu and Si partitioning and Cu speciation were investigated by chemical analysis, microscopic and spectroscopic techniques. Copper was present as Cu(I) and Cu(II) depending on plant parts. Bamboo mainly coped with high Cu exposure by: (i) high Cu sequestration in the root (ii) Cu(II) binding to amino and carboxyl ligands in roots, and (iii) Cu(I) complexation with both organic and inorganic sulfur ligands in stems and leaves. Silicon supplementation decreased the visible damage induced by high Cu exposure and modified Cu speciation in the leaves where a higher proportion of Cu was present as inorganic Cu(I)S compounds, which may be less toxic.
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Affiliation(s)
- Blanche Collin
- CEREGE, CNRS, Aix-Marseille Univ., Europôle méditerranéen de l'Arbois, BP 80, 13545 Aix en Provence, France; Département de recherche développement de la société PHYTOREM S.A., Chemin de l'Autodrome, 13140 Miramas, France.
| | - Emmanuel Doelsch
- CIRAD, UPR Recyclage et risque, Avenue Agropolis, F-34398 Montpellier, France.
| | - Catherine Keller
- CEREGE, CNRS, Aix-Marseille Univ., Europôle méditerranéen de l'Arbois, BP 80, 13545 Aix en Provence, France.
| | - Patrick Cazevieille
- CIRAD, UPR Recyclage et risque, Avenue Agropolis, F-34398 Montpellier, France.
| | - Marie Tella
- CIRAD, UPR Recyclage et risque, Avenue Agropolis, F-34398 Montpellier, France.
| | - Perrine Chaurand
- CEREGE, CNRS, Aix-Marseille Univ., Europôle méditerranéen de l'Arbois, BP 80, 13545 Aix en Provence, France.
| | - Frédéric Panfili
- Département de recherche développement de la société PHYTOREM S.A., Chemin de l'Autodrome, 13140 Miramas, France.
| | - Jean-Louis Hazemann
- Institut Néel, CNRS and Université Joseph Fourier, BP 166, F-38042 Grenoble Cedex 9, France.
| | - Jean-Dominique Meunier
- CEREGE, CNRS, Aix-Marseille Univ., Europôle méditerranéen de l'Arbois, BP 80, 13545 Aix en Provence, France.
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Álvarez-Fernández A, Díaz-Benito P, Abadía A, López-Millán AF, Abadía J. Metal species involved in long distance metal transport in plants. FRONTIERS IN PLANT SCIENCE 2014; 5:105. [PMID: 24723928 PMCID: PMC3971170 DOI: 10.3389/fpls.2014.00105] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 03/04/2014] [Indexed: 05/19/2023]
Abstract
The mechanisms plants use to transport metals from roots to shoots are not completely understood. It has long been proposed that organic molecules participate in metal translocation within the plant. However, until recently the identity of the complexes involved in the long-distance transport of metals could only be inferred by using indirect methods, such as analyzing separately the concentrations of metals and putative ligands and then using in silico chemical speciation software to predict metal species. Molecular biology approaches also have provided a breadth of information about putative metal ligands and metal complexes occurring in plant fluids. The new advances in analytical techniques based on mass spectrometry and the increased use of synchrotron X-ray spectroscopy have allowed for the identification of some metal-ligand species in plant fluids such as the xylem and phloem saps. Also, some proteins present in plant fluids can bind metals and a few studies have explored this possibility. This study reviews the analytical challenges researchers have to face to understand long-distance metal transport in plants as well as the recent advances in the identification of the ligand and metal-ligand complexes in plant fluids.
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Affiliation(s)
| | | | | | | | - Javier Abadía
- Plant Nutrition Department, Aula Dei Experimental Station (CSIC)Zaragoza, Spain
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37
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Zhao FJ, Moore KL, Lombi E, Zhu YG. Imaging element distribution and speciation in plant cells. TRENDS IN PLANT SCIENCE 2014; 19:183-92. [PMID: 24394523 DOI: 10.1016/j.tplants.2013.12.001] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 11/27/2013] [Accepted: 12/09/2013] [Indexed: 05/08/2023]
Abstract
To maintain cellular homeostasis, concentrations, chemical speciation, and localization of mineral nutrients and toxic trace elements need to be regulated. Imaging the cellular and subcellular localization of elements and measuring their in situ chemical speciation are challenging tasks that can be undertaken using synchrotron-based techniques, such as X-ray fluorescence and X-ray absorption spectrometry, and mass spectrometry-based techniques, such as secondary ion mass spectrometry and laser-ablation inductively coupled plasma mass spectrometry. We review the advantages and limitations of these techniques, and discuss examples of their applications, which have revealed highly heterogeneous distribution patterns of elements in different cell types, often varying in chemical speciation. Combining these techniques with molecular genetic approaches can unravel functions of genes involved in element homeostasis.
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Affiliation(s)
- Fang-Jie Zhao
- National Key Laboratory of Crop Genetics and Germplasm Enhancement and Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
| | - Katie L Moore
- Department of Materials, University of Oxford, Oxford OX1 3PH, UK
| | - Enzo Lombi
- Centre for Environmental Risk Assessment and Remediation, University of South Australia, Building X, Mawson Lakes Campus, Mawson Lakes, South Australia SA-5095, Australia
| | - Yong-Guan Zhu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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38
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Moore KL, Chen Y, van de Meene AML, Hughes L, Liu W, Geraki T, Mosselmans F, McGrath SP, Grovenor C, Zhao FJ. Combined NanoSIMS and synchrotron X-ray fluorescence reveal distinct cellular and subcellular distribution patterns of trace elements in rice tissues. THE NEW PHYTOLOGIST 2014; 201:104-115. [PMID: 24107000 DOI: 10.1111/nph.12497] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Accepted: 08/12/2013] [Indexed: 05/07/2023]
Abstract
The cellular and subcellular distributions of trace elements can provide important clues to understanding how the elements are transported and stored in plant cells, but mapping their distributions is a challenging task. The distributions of arsenic, iron, zinc, manganese and copper, as well as physiologically related macro-elements, were mapped in the node, internode and leaf sheath of rice (Oryza sativa) using synchrotron X-ray fluorescence (S-XRF) and high-resolution secondary ion mass spectrometry (NanoSIMS). Although copper and silicon generally showed cell wall localization, arsenic, iron and zinc were strongly localized in the vacuoles of specific cell types. Arsenic was highly localized in the companion cell vacuoles of the phloem in all vascular bundles, showing a strong co-localization with sulfur, consistent with As(III)-thiol complexation. Within the node, zinc was localized in the vacuoles of the parenchyma cell bridge bordering the enlarged and diffuse vascular bundles, whereas iron and manganese were localized in the fundamental parenchyma cells, with iron being strongly co-localized with phosphorus in the vacuoles. The highly heterogeneous and contrasting distribution patterns of these elements imply different transport activities and/or storage capacities among different cell types. Sequestration of arsenic in companion cell vacuoles may explain the limited phloem mobility of arsenite.
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Affiliation(s)
- Katie L Moore
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
| | - Yi Chen
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | | | - Louise Hughes
- Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, OX3 0BP, UK
| | - Wenju Liu
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - Tina Geraki
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Chilton, Didcot, OX11 0DE, UK
| | - Fred Mosselmans
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Chilton, Didcot, OX11 0DE, UK
| | | | - Chris Grovenor
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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39
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Li Z, Wu L, Hu P, Luo Y, Christie P. Copper changes the yield and cadmium/zinc accumulation and cellular distribution in the cadmium/zinc hyperaccumulator Sedum plumbizincicola. JOURNAL OF HAZARDOUS MATERIALS 2013; 261:332-341. [PMID: 23959253 DOI: 10.1016/j.jhazmat.2013.07.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 07/15/2013] [Accepted: 07/25/2013] [Indexed: 06/02/2023]
Abstract
Non-accumulated metals in mixed metal contaminated soils may affect hyperaccumulator growth and metal accumulation and thus remediation efficiency. Two hydroponics experiments were conducted to investigate the effects of copper (Cu) on cadmium (Cd) and zinc (Zn) accumulation by the Cd/Zn hyperaccumulator Sedum plumbizincicola, Cu toxicity and plant detoxification using chemical sequential extraction of metals, sub-cellular separation, micro synchrotron radiation based X-ray fluorescence, and transmission electron microscopy. Compared with the control (0.31 μM Cu), 5-50 μM Cu had no significant effect on Cd/Zn accumulation, but Cu at 200 μM induced root cell plasmolysis and disordered chloroplast structure. The plants held Cu in the roots and cell walls and complexed Cu in insoluble forms as their main detoxification mechanisms. Exposure to 200 μM Cu for 4 days inhibited plant Cd uptake and translocation but did not affect Zn concentrations in roots and stems. Moreover, unloading of Cd and Zn from stem to leaf was restrained compared to control plants, perhaps due to Cu accumulation in leaf veins. Copper may thus interfere with root Cd uptake and restrain Cd/Zn unloading to the leaves. Further investigation of how Cu affects plant metal uptake may help elucidate the Cd/Zn hyper-accumulating mechanisms of S. plumbizincicola.
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Affiliation(s)
- Zhu Li
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
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40
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Leitenmaier B, Küpper H. Compartmentation and complexation of metals in hyperaccumulator plants. FRONTIERS IN PLANT SCIENCE 2013; 4:374. [PMID: 24065978 PMCID: PMC3778397 DOI: 10.3389/fpls.2013.00374] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 09/03/2013] [Indexed: 05/18/2023]
Abstract
Hyperaccumulators are being intensely investigated. They are not only interesting in scientific context due to their "strange" behavior in terms of dealing with high concentrations of metals, but also because of their use in phytoremediation and phytomining, for which understanding the mechanisms of hyperaccumulation is crucial. Hyperaccumulators naturally use metal accumulation as a defense against herbivores and pathogens, and therefore deal with accumulated metals in very specific ways of complexation and compartmentation, different from non-hyperaccumulator plants and also non-hyperaccumulated metals. For example, in contrast to non-hyperaccumulators, in hyperaccumulators even the classical phytochelatin-inducing metal, cadmium, is predominantly not bound by such sulfur ligands, but only by weak oxygen ligands. This applies to all hyperaccumulated metals investigated so far, as well as hyperaccumulation of the metalloid arsenic. Stronger ligands, as they have been shown to complex metals in non-hyperaccumulators, are in hyperaccumulators used for transient binding during transport to the storage sites (e.g., nicotianamine) and possibly for export of Cu in Cd/Zn hyperaccumulators [metallothioneins (MTs)]. This confirmed that enhanced active metal transport, and not metal complexation, is the key mechanism of hyperaccumulation. Hyperaccumulators tolerate the high amount of accumulated heavy metals by sequestering them into vacuoles, usually in large storage cells of the epidermis. This is mediated by strongly elevated expression of specific transport proteins in various tissues from metal uptake in the shoots up to the storage sites in the leaf epidermis. However, this mechanism seems to be very metal specific. Non-hyperaccumulated metals in hyperaccumulators seem to be dealt with like in non-hyperaccumulator plants, i.e., detoxified by binding to strong ligands such as MTs.
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Affiliation(s)
| | - Hendrik Küpper
- Fachbereich Biologie, Universität KonstanzKonstanz, Germany
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41
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Ryan BM, Kirby JK, Degryse F, Harris H, McLaughlin MJ, Scheiderich K. Copper speciation and isotopic fractionation in plants: uptake and translocation mechanisms. THE NEW PHYTOLOGIST 2013; 199:367-378. [PMID: 23600562 DOI: 10.1111/nph.12276] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 03/12/2013] [Indexed: 05/03/2023]
Abstract
The fractionation of stable copper (Cu) isotopes during uptake into plant roots and translocation to shoots can provide information on Cu acquisition mechanisms. Isotope fractionation ((65) Cu/(63) Cu) and intact tissue speciation techniques (X-ray absorption spectroscopy, XAS) were used to examine the uptake, translocation and speciation of Cu in strategy I (tomato-Solanum lycopersicum) and strategy II (oat-Avena sativa) plant species. Plants were grown in controlled solution cultures, under varied iron (Fe) conditions, to test whether the stimulation of Fe-acquiring mechanisms can affect Cu uptake in plants. Isotopically light Cu was preferentially incorporated into tomatoes (Δ(65) Cu(whole plant-solution ) = c. -1‰), whereas oats showed minimal isotopic fractionation, with no effect of Fe supply in either species. The heavier isotope was preferentially translocated to shoots in tomato, whereas oat plants showed no significant fractionation during translocation. The majority of Cu in the roots and leaves of both species existed as sulfur-coordinated Cu(I) species resembling glutathione/cysteine-rich proteins. The presence of isotopically light Cu in tomatoes is attributed to a reductive uptake mechanism, and the isotopic shifts within various tissues are attributed to redox cycling during translocation. The lack of isotopic discrimination in oat plants suggests that Cu uptake and translocation are not redox selective.
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Affiliation(s)
- Brooke M Ryan
- Soil Sciences, University of Adelaide, Adelaide, SA, 5064, Australia
| | - Jason K Kirby
- CSIRO Land and Water, Contaminant Chemistry and Ecotoxicology Program, Waite Campus, Adelaide, SA, 5064, Australia
| | - Fien Degryse
- Soil Sciences, University of Adelaide, Adelaide, SA, 5064, Australia
| | - Hugh Harris
- School of Chemistry and Physics, University of Adelaide, Adelaide, SA, 5000, Australia
| | - Mike J McLaughlin
- Soil Sciences, University of Adelaide, Adelaide, SA, 5064, Australia
- CSIRO Land and Water, Contaminant Chemistry and Ecotoxicology Program, Waite Campus, Adelaide, SA, 5064, Australia
| | - Kathleen Scheiderich
- CSIRO Land and Water, Contaminant Chemistry and Ecotoxicology Program, Waite Campus, Adelaide, SA, 5064, Australia
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42
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Lucas WJ, Groover A, Lichtenberger R, Furuta K, Yadav SR, Helariutta Y, He XQ, Fukuda H, Kang J, Brady SM, Patrick JW, Sperry J, Yoshida A, López-Millán AF, Grusak MA, Kachroo P. The plant vascular system: evolution, development and functions. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2013; 55:294-388. [PMID: 23462277 DOI: 10.1111/jipb.12041] [Citation(s) in RCA: 393] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The emergence of the tracheophyte-based vascular system of land plants had major impacts on the evolution of terrestrial biology, in general, through its role in facilitating the development of plants with increased stature, photosynthetic output, and ability to colonize a greatly expanded range of environmental habitats. Recently, considerable progress has been made in terms of our understanding of the developmental and physiological programs involved in the formation and function of the plant vascular system. In this review, we first examine the evolutionary events that gave rise to the tracheophytes, followed by analysis of the genetic and hormonal networks that cooperate to orchestrate vascular development in the gymnosperms and angiosperms. The two essential functions performed by the vascular system, namely the delivery of resources (water, essential mineral nutrients, sugars and amino acids) to the various plant organs and provision of mechanical support are next discussed. Here, we focus on critical questions relating to structural and physiological properties controlling the delivery of material through the xylem and phloem. Recent discoveries into the role of the vascular system as an effective long-distance communication system are next assessed in terms of the coordination of developmental, physiological and defense-related processes, at the whole-plant level. A concerted effort has been made to integrate all these new findings into a comprehensive picture of the state-of-the-art in the area of plant vascular biology. Finally, areas important for future research are highlighted in terms of their likely contribution both to basic knowledge and applications to primary industry.
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Affiliation(s)
- William J Lucas
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA.
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Manceau A, Simionovici A, Lanson M, Perrin J, Tucoulou R, Bohic S, Fakra SC, Marcus MA, Bedell JP, Nagy KL. Thlaspi arvense binds Cu(ii) as a bis-(l-histidinato) complex on root cell walls in an urban ecosystem. Metallomics 2013; 5:1674-84. [DOI: 10.1039/c3mt00215b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Plants are categorized in three groups concerning their uptake of heavy metals: indicator, excluder, and hyperaccumulator plants, which we explain in this chapter, the former two groups briefly and the hyperaccumulators in detail. The ecological role of hyperaccumulation, for example, the prevention of herbivore attacks and a possible substitution of Zn by Cd in an essential enzyme, is discussed. As the mechanisms of cadmium hyperaccumulation are a very interesting and challenging topic and many aspects are studied worldwide, we provide a broad overview over compartmentation strategies, expression and function of metal transporting proteins and the role of ligands for uptake, transport, and storage of cadmium. Hyperaccumulators are not without reason a topic of great interest, they can be used biotechnologically for two main purposes which we discuss here for Cd: phytoremediation, dealing with the cleaning of anthropogenically contaminated soils as well as phytomining, i.e., the use of plants for commercial metal extraction. Finally, the outlook deals with topics for future research in the fields of biochemistry/biophysics, molecular biology, and biotechnology. We discuss which knowledge is still missing to fully understand Cd hyperaccumulation by plants and to use that phenomenon even more successfully for both environmental and economical purposes.
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Affiliation(s)
- Hendrik Küpper
- Fachbereich Biologie, Universität Konstanz, Konstanz, Germany.
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Buss W, Kammann C, Koyro HW. Biochar reduces copper toxicity in Chenopodium quinoa Willd. In a sandy soil. JOURNAL OF ENVIRONMENTAL QUALITY 2012; 41:1157-1165. [PMID: 22751058 DOI: 10.2134/jeq2011.0022] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Mining, smelting, land applications of sewage sludge, the use of fungicides containing copper (Cu), and other human activities have led to widespread soil enrichment and contamination with Cu and potentially toxic conditions. Biochar (BC) can adsorb several substances, ranging from herbicides to plant-inhibiting allelochemicals. However, the range of potential beneficial effects on early-stage plant growth with regard to heavy metal toxicity is largely unexplored. We investigated the ameliorating properties of a forestry-residue BC under Cu toxicity conditions on early plant growth. Young quinoa plants () were grown in the greenhouse in the presence of 0, 2, and 4% BC application (w/w) added to a sandy soil with 0, 50, or 200 μg g Cu supplied. The plants without BC showed severe stress symptoms and reduced growth shortly after Cu application of 50 μg g and died at 200 μg Cu g. Increasing BC concentrations in the growth medium significantly increased the plant performance without Cu toxicity or under Cu stress. At the 4% BC application rate, the plants with 200 μg g Cu almost reached the same biomass as in the control treatment. In the presence of BC, less Cu entered the plant tissues, which had reduced Cu concentrations in the order roots, shoots, leaves. The amelioration effect also was reflected in the plant-soil system CO gas exchange, which showed clear signs of improvement with BC presence. The most likely ameliorating mechanisms were adsorption of Cu to negatively charged BC surfaces and an improvement of the water supply. Overall, BC seems to be a beneficial amendment with the potential to ameliorate Cu toxicity in sandy soils. Further research with a broad spectrum of different soil types, BCs, and crop plants is required.
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Affiliation(s)
- Wolfram Buss
- Department of Plant Ecology, Justus-Liebeg-Univ, Giessen, Germany
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Biochemical and Functional Responses of Arabidopsis thaliana Exposed to Cadmium, Copper and Zinc. THE PLANT FAMILY BRASSICACEAE 2012. [DOI: 10.1007/978-94-007-3913-0_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
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Leitenmaier B, Witt A, Witzke A, Stemke A, Meyer-Klaucke W, Kroneck PM, Küpper H. Biochemical and biophysical characterisation yields insights into the mechanism of a Cd/Zn transporting ATPase purified from the hyperaccumulator plant Thlaspi caerulescens. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:2591-9. [DOI: 10.1016/j.bbamem.2011.05.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 05/10/2011] [Accepted: 05/11/2011] [Indexed: 01/05/2023]
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Singh S, Korripally P, Vancheeswaran R, Eapen S. Transgenic Nicotiana tabacum plants expressing a fungal copper transporter gene show enhanced acquisition of copper. PLANT CELL REPORTS 2011; 30:1929-38. [PMID: 21671073 DOI: 10.1007/s00299-011-1101-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 05/26/2011] [Accepted: 05/31/2011] [Indexed: 05/30/2023]
Abstract
The diets of two-thirds of the world's population are deficient in one or more essential elements and one of the approaches to enhance the levels of mineral elements in food crops is by developing plants with ability to accumulate them in edible parts. Besides conventional methods, transgenic technology can be used for enhancing metal acquisition in plants. Copper is an essential element, which is often deficient in human diet. With the objective of developing plants with improved copper acquisition, a high-affinity copper transporter gene (tcu-1) was cloned from fungus Neurospora crassa and introduced into a model plant (Nicotiana tabacum). Integration of the transgene was confirmed by Southern blot hybridization. Transgenic tobacco plants (T(0) and T(1)) expressing tcu-1, when grown in hydroponic medium spiked with different concentrations of copper, showed higher acquisition of copper (up to 3.1 times) compared with control plants. Transgenic plants grown in soil spiked with copper could also take up more copper compared with wild-type plants. Supplementation of other divalent cations such as Cd(2+) and Zn(2+) did not alter uptake of Cu by transgenic plants. The present study has shown that expression of a heterologous copper transporter in tobacco could enhance acquisition of copper.
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Affiliation(s)
- Sudhir Singh
- Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
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Kopittke PM, Menzies NW, de Jonge MD, McKenna BA, Donner E, Webb RI, Paterson DJ, Howard DL, Ryan CG, Glover CJ, Scheckel KG, Lombi E. In situ distribution and speciation of toxic copper, nickel, and zinc in hydrated roots of cowpea. PLANT PHYSIOLOGY 2011; 156:663-73. [PMID: 21525332 PMCID: PMC3177266 DOI: 10.1104/pp.111.173716] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The phytotoxicity of trace metals is of global concern due to contamination of the landscape by human activities. Using synchrotron-based x-ray fluorescence microscopy and x-ray absorption spectroscopy, the distribution and speciation of copper (Cu), nickel (Ni), and zinc (Zn) was examined in situ using hydrated roots of cowpea (Vigna unguiculata) exposed to 1.5 μm Cu, 5 μm Ni, or 40 μm Zn for 1 to 24 h. After 24 h of exposure, most Cu was bound to polygalacturonic acid of the rhizodermis and outer cortex, suggesting that binding of Cu to walls of cells in the rhizodermis possibly contributes to the toxic effects of Cu. When exposed to Zn, cortical concentrations remained comparatively low with much of the Zn accumulating in the meristematic region and moving into the stele; approximately 60% to 85% of the total Zn stored as Zn phytate within 3 h of exposure. While Ni concentrations were high in both the cortex and meristem, concentrations in the stele were comparatively low. To our knowledge, this is the first report of the in situ distribution and speciation of Cu, Ni, and Zn in hydrated (and fresh) plant tissues, providing valuable information on the potential mechanisms by which they are toxic.
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Affiliation(s)
- Peter M Kopittke
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia.
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