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Romero S, González A, Osorio H, Segura R, Moenne A. Copper Is Accumulated as Copper Sulfide Particles, and Not Bound to Glutathione, Phytochelatins or Metallothioneins, in the Marine Alga Ulva compressa (Chlorophyta). Int J Mol Sci 2024; 25:7632. [PMID: 39062874 PMCID: PMC11277147 DOI: 10.3390/ijms25147632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/08/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024] Open
Abstract
To analyze the mechanism of copper accumulation in the marine alga Ulva compressa, it was cultivated with 10 μM of copper, with 10 μM of copper and increasing concentrations of a sulfide donor (NaHS) for 0 to 7 days, and with 10 μM of copper and a concentration of the sulfide acceptor (hypotaurine) for 5 days. The level of intracellular copper was determined as well as the level of glutathione (GSH) and phytochelatins (PCs) and the expression of metallothioneins (UcMTs). The level of intracellular copper in the algae treated with copper increased at day 1, slightly increased until day 5 and remained unchanged until day 7. The level of copper in the algae cultivated with copper and 100 or 200 μM of NaHS continuously increased until day 7 and the copper level was higher in the algae cultivated with 200 μM of NaHS compared to 100 μM of NaHS. In contrast, the level of intracellular copper decreased in the algae treated with copper and hypotaurine. The level of intracellular copper did not correlate with the level of GSH or with the expression of UcMTs, and PCs were not detected in response to copper, or copper and NaHS. Algae treated with copper and with copper and 200 μM of NaHS for 5 days were visualized by TEM and the elemental composition of electrondense particles was analyzed by EDXS. The algae treated with copper showed electrondense particles containing copper and sulfur, but not nitrogen, and they were mainly located in the chloroplast, but also in the cytoplasm. The algae treated with copper and NaHS showed a higher level of electrondense particles containing copper and sulfur, but not nitrogen, and they were located in the chloroplast, and in the cytoplasm. Thus, copper is accumulated as copper sulfide insoluble particles, and not bound to GSH, PCs or UcMTs, in the marine alga U. compressa.
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Affiliation(s)
- Stephanie Romero
- Laboratory of Marine Biotechnology, Faculty of Chemistry and Biology, University of Santiago of Chile, Alameda 3363, Santiago 917022, Chile; (S.R.); (A.G.); (H.O.)
| | - Alberto González
- Laboratory of Marine Biotechnology, Faculty of Chemistry and Biology, University of Santiago of Chile, Alameda 3363, Santiago 917022, Chile; (S.R.); (A.G.); (H.O.)
| | - Héctor Osorio
- Laboratory of Marine Biotechnology, Faculty of Chemistry and Biology, University of Santiago of Chile, Alameda 3363, Santiago 917022, Chile; (S.R.); (A.G.); (H.O.)
| | - Rodrigo Segura
- Laboratory of Inorganic Chemistry, Faculty of Chemistry and Biology, University of Santiago of Chile, Alameda 3363, Santiago 917022, Chile;
| | - Alejandra Moenne
- Laboratory of Marine Biotechnology, Faculty of Chemistry and Biology, University of Santiago of Chile, Alameda 3363, Santiago 917022, Chile; (S.R.); (A.G.); (H.O.)
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Chot E, Reddy MS. Role of Ectomycorrhizal Symbiosis Behind the Host Plants Ameliorated Tolerance Against Heavy Metal Stress. Front Microbiol 2022; 13:855473. [PMID: 35418968 PMCID: PMC8996229 DOI: 10.3389/fmicb.2022.855473] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 02/15/2022] [Indexed: 12/05/2022] Open
Abstract
Soil heavy metal (HM) pollution, which arises from natural and anthropogenic sources, is a prime threat to the environment due to its accumulative property and non-biodegradability. Ectomycorrhizal (ECM) symbiosis is highly efficient in conferring enhanced metal tolerance to their host plants, enabling their regeneration on metal-contaminated lands for bioremediation programs. Numerous reports are available regarding ECM fungal potential to colonize metal-contaminated lands and various defense mechanisms of ECM fungi and plants against HM stress separately. To utilize ECM–plant symbiosis successfully for bioremediation of metal-contaminated lands, understanding the fundamental regulatory mechanisms through which ECM symbiosis develops an enhanced metal tolerance in their host plants has prime importance. As this field is highly understudied, the present review emphasizes how plant’s various defense systems and their nutrient dynamics with soil are affected by ECM fungal symbiosis under metal stress, ultimately leading to their host plants ameliorated tolerance and growth. Overall, we conclude that ECM symbiosis improves the plant growth and tolerance against metal stress by (i) preventing their roots direct exposure to toxic soil HMs, (ii) improving plant antioxidant activity and intracellular metal sequestration potential, and (iii) altering plant nutrient uptake from the soil in such a way to enhance their tolerance against metal stress. In some cases, ECM symbiosis promotes HM accumulation in metal stressed plants simultaneous to improved growth under the HM dilution effect.
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Affiliation(s)
- Eetika Chot
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala, India
| | - Mondem Sudhakara Reddy
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala, India
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3
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Nykiel M, Gietler M, Fidler J, Prabucka B, Rybarczyk-Płońska A, Graska J, Boguszewska-Mańkowska D, Muszyńska E, Morkunas I, Labudda M. Signal Transduction in Cereal Plants Struggling with Environmental Stresses: From Perception to Response. PLANTS (BASEL, SWITZERLAND) 2022; 11:1009. [PMID: 35448737 PMCID: PMC9026486 DOI: 10.3390/plants11081009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 05/13/2023]
Abstract
Cereal plants under abiotic or biotic stressors to survive unfavourable conditions and continue growth and development, rapidly and precisely identify external stimuli and activate complex molecular, biochemical, and physiological responses. To elicit a response to the stress factors, interactions between reactive oxygen and nitrogen species, calcium ions, mitogen-activated protein kinases, calcium-dependent protein kinases, calcineurin B-like interacting protein kinase, phytohormones and transcription factors occur. The integration of all these elements enables the change of gene expression, and the release of the antioxidant defence and protein repair systems. There are still numerous gaps in knowledge on these subjects in the literature caused by the multitude of signalling cascade components, simultaneous activation of multiple pathways and the intersection of their individual elements in response to both single and multiple stresses. Here, signal transduction pathways in cereal plants under drought, salinity, heavy metal stress, pathogen, and pest attack, as well as the crosstalk between the reactions during double stress responses are discussed. This article is a summary of the latest discoveries on signal transduction pathways and it integrates the available information to better outline the whole research problem for future research challenges as well as for the creative breeding of stress-tolerant cultivars of cereals.
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Affiliation(s)
- Małgorzata Nykiel
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
| | - Marta Gietler
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
| | - Justyna Fidler
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
| | - Beata Prabucka
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
| | - Anna Rybarczyk-Płońska
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
| | - Jakub Graska
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
| | | | - Ewa Muszyńska
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland;
| | - Iwona Morkunas
- Department of Plant Physiology, Poznań University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland;
| | - Mateusz Labudda
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, 02-776 Warsaw, Poland; (M.G.); (J.F.); (B.P.); (A.R.-P.); (J.G.); (M.L.)
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4
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Chen Y, Liang J, Chen Z, Wang B, Si T. Genome-Scale Screening and Combinatorial Optimization of Gene Overexpression Targets to Improve Cadmium Tolerance in Saccharomyces cerevisiae. Front Microbiol 2021; 12:662512. [PMID: 34335494 PMCID: PMC8318699 DOI: 10.3389/fmicb.2021.662512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/18/2021] [Indexed: 11/13/2022] Open
Abstract
Heavy metal contamination is an environmental issue on a global scale. Particularly, cadmium poses substantial threats to crop and human health. Saccharomyces cerevisiae is one of the model organisms to study cadmium toxicity and was recently engineered as a cadmium hyperaccumulator. Therefore, it is desirable to overcome the cadmium sensitivity of S. cerevisiae via genetic engineering for bioremediation applications. Here we performed genome-scale overexpression screening for gene targets conferring cadmium resistance in CEN.PK2-1c, an industrial S. cerevisiae strain. Seven targets were identified, including CAD1 and CUP1 that are known to improve cadmium tolerance, as well as CRS5, NRG1, PPH21, BMH1, and QCR6 that are less studied. In the wild-type strain, cadmium exposure activated gene transcription of CAD1, CRS5, CUP1, and NRG1 and repressed PPH21, as revealed by real-time quantitative PCR analyses. Furthermore, yeast strains that contained two overexpression mutations out of the seven gene targets were constructed. Synergistic improvement in cadmium tolerance was observed with episomal co-expression of CRS5 and CUP1. In the presence of 200 μM cadmium, the most resistant strain overexpressing both CAD1 and NRG1 exhibited a 3.6-fold improvement in biomass accumulation relative to wild type. This work provided a new approach to discover and optimize genetic engineering targets for increasing cadmium resistance in yeast.
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Affiliation(s)
- Yongcan Chen
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Shenzhen, China
| | - Jun Liang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zhicong Chen
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Shenzhen, China
| | - Bo Wang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Tong Si
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Shenzhen, China
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5
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Abstract
Cadmium (Cd) is an element that is nonessential and extremely toxic to both plants and human beings. Soil contaminated with Cd has adverse impacts on crop yields and threatens human health via the food chain. Cultivation of low-Cd cultivars has been of particular interest and is one of the most cost-effective and promising approaches to minimize human dietary intake of Cd. Low-Cd crop cultivars should meet particular criteria, including acceptable yield and quality, and their edible parts should have Cd concentrations below maximum permissible concentrations for safe consumption, even when grown in Cd-contaminated soil. Several low-Cd cereal cultivars and genotypes have been developed worldwide through cultivar screening and conventional breeding. Molecular markers are powerful in facilitating the selection of low-Cd cereal cultivars. Modern molecular breeding technologies may have great potential in breeding programs for the development of low-Cd cultivars, especially when coupled with conventional breeding. In this review, we provide a synthesis of low-Cd cereal breeding.
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Affiliation(s)
- Qin Chen
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Fei-Bo Wu
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
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Zhou Y, Liu J, Liu S, Jiang L, Hu L. Identification of the metallothionein gene family from cucumber and functional characterization of CsMT4 in Escherichia coli under salinity and osmotic stress. 3 Biotech 2019; 9:394. [PMID: 31656732 PMCID: PMC6789051 DOI: 10.1007/s13205-019-1929-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 09/29/2019] [Indexed: 12/17/2022] Open
Abstract
Metallothionein (MT) proteins are low-molecular-weight, cysteine-rich and metal-binding proteins that play important roles in the maintenance of metal homeostasis and detoxification, but their roles in abiotic stress tolerance remain largely unknown. In this study, three MT family genes (CsMT2, CsMT3 and CsMT4) were identified in the cucumber genome. CsMT2, CsMT3 and CsMT4 possessed 14, 10, and 18 Cys residues, which were clustered into 2, 2, and 3 Cys-rich regions, respectively. Phylogenetic analysis of MTs from cucumber, Arabidopsis and soybean revealed that these MTs were clustered into four groups in accordance with the MT types (types 1-4). An analysis of the cis-acting regulatory elements revealed that a series of hormone-, stress-, and development-related cis-elements were present in the promoter regions of CsMT genes. Expression pattern analysis by RT-PCR showed that the CsMT genes exhibited different tissue expression patterns. CsMT2 showed relatively higher expression in stem, leaf, and flower; CsMT3 was mainly expressed in leaf, flower, and fruit, while CsMT4 was highly expressed in fruit and leaf. The qRT-PCR results showed that the CsMT genes were induced by various stress treatments including NaCl, PEG, and ABA, while CsMT4 displayed much higher expression levels in response to these stresses than CsMT2 and CsMT3. Escherichia coli cells expressing CsMT4 exhibited higher salinity and osmotic tolerance compared with control cells, indicating the significant function of CsMT4 to confer tolerance to these stresses. These results lay a foundation for further research on the function of MT family genes in plant stress responses.
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Affiliation(s)
- Yong Zhou
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045 China
- College of Science, Jiangxi Agricultural University, Nanchang, 330045 China
- Institute of Biotechnology and Physical Agricultural Engineering, Jiangxi Agricultural University, Nanchang, 330045 China
| | - Jialin Liu
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045 China
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045 China
| | - Shiqiang Liu
- College of Science, Jiangxi Agricultural University, Nanchang, 330045 China
- Institute of Biotechnology and Physical Agricultural Engineering, Jiangxi Agricultural University, Nanchang, 330045 China
| | - Lunwei Jiang
- Institute of Biotechnology and Physical Agricultural Engineering, Jiangxi Agricultural University, Nanchang, 330045 China
| | - Lifang Hu
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045 China
- College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045 China
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7
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Dong XB, Huang W, Bian YB, Feng X, Ibrahim SA, Shi DF, Qiao X, Liu Y. Remediation and Mechanisms of Cadmium Biosorption by a Cadmium-Binding Protein from Lentinula edodes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11373-11379. [PMID: 31539240 DOI: 10.1021/acs.jafc.9b04741] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cadmium bioremediation with metal-binding proteins is primarily conducted using metallothioneins (MTs). However, in the present study, we investigated a non-MT cadmium-binding protein from Lentinula edodes (LECBP) as a remediation tool for cadmium biosorption in Escherichia coli. The results indicated that the expression of LECBP significantly enhanced the cadmium biosorption capacity of transgenic E. coli. The secondary structure and conformation of LECBP were changed after binding with cadmium as evidenced by circular dichroism and fluorescence spectroscopy. The results of Fourier transform infrared spectroscopy indicated that carboxyl oxygen and amino nitrogen atoms were involved in the interaction between LECBP and cadmium. The results further demonstrated that glutamic acid and histidine residues are the potential binding sites. Our results have thus provided new insights into cadmium bioremediation in an aquatic environment.
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Affiliation(s)
| | | | | | - Xi Feng
- Department of Nutrition, Food Science and Packaging , California State University , San Jose , California 95192 , United States
| | - Salam A Ibrahim
- Department of Family and Consumer Sciences , North Carolina A&T State University , 171 Carver Hall , Greensboro , North Carolina 27411 , United States
| | - De-Fang Shi
- Research Institute of Agricultural Products Processing and Nuclear-Agricultural Technology , Hubei Academy of Agricultural Sciences , Wuhan , Hubei 430064 , China
| | - Xin Qiao
- College of Culinary and Food Engineering , Wuhan Business University , Wuhan , Hubei 430056 , China
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8
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Chen J, Zou W, Meng L, Fan X, Xu G, Ye G. Advances in the Uptake and Transport Mechanisms and QTLs Mapping of Cadmium in Rice. Int J Mol Sci 2019; 20:ijms20143417. [PMID: 31336794 PMCID: PMC6678204 DOI: 10.3390/ijms20143417] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 02/07/2023] Open
Abstract
Cadmium (Cd), as a heavy metal, presents substantial biological toxicity and has harmful effects on human health. To lower the ingress levels of human Cd, it is necessary for Cd content in food crops to be reduced, which is of considerable significance for ensuring food safety. This review will summarize the genetic traits of Cd accumulation in rice and examine the mechanism of Cd uptake and translocation in rice. The status of genes related to Cd stress and Cd accumulation in rice in recent years will be summarized, and the genes related to Cd accumulation in rice will be classified according to their functions. In addition, an overview of quantitative trait loci (QTLs) mapping populations in rice will be introduced, aiming to provide a theoretical reference for the breeding of rice varieties with low Cd accumulation. Finally, existing problems and prospects will be put forward.
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Affiliation(s)
- Jingguang Chen
- CAAS-IRRI Joint Laboratory for Genomics-Assisted Germplasm Enhancement, Agricultural Genomics Institute in Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wenli Zou
- CAAS-IRRI Joint Laboratory for Genomics-Assisted Germplasm Enhancement, Agricultural Genomics Institute in Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Lijun Meng
- CAAS-IRRI Joint Laboratory for Genomics-Assisted Germplasm Enhancement, Agricultural Genomics Institute in Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China.
| | - Xiaorong Fan
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Guohua Xu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Guoyou Ye
- CAAS-IRRI Joint Laboratory for Genomics-Assisted Germplasm Enhancement, Agricultural Genomics Institute in Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
- Strategic Innovation Platform, International Rice Research Institute, DAPO Box 7777, Metro Manila 1226, Philippines
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9
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In vitro release and antioxidative potential of Pequi oil-based biopolymers (Caryocar brasiliense Cambess). JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1836-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Yu XZ, Lin YJ, Zhang Q. Metallothioneins enhance chromium detoxification through scavenging ROS and stimulating metal chelation in Oryza sativa. CHEMOSPHERE 2019; 220:300-313. [PMID: 30590296 DOI: 10.1016/j.chemosphere.2018.12.119] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/11/2018] [Accepted: 12/17/2018] [Indexed: 05/03/2023]
Abstract
Metallothioneins (MTs) is a metal ion binding protein to detoxify heavy metal stress in plant cells. This study examines involvement of MTs in metal chelation and ROS scavenging in rice seedling under Cr induction either Cr(VI) or Cr(III) at three different effective concentrations using Agilent 44K rice microarray and real-time PCR technology. Results showed that the concentration of Cr was higher in roots than in shoots in both Cr treatments. Accumulation of both H2O2 and O2- in rice tissues was evident, but the fluctuation of H2O2 was more remarkable than O2-. Both Cr exposures resulted in enhancement of MTs in plant tissues. Results from PCR analysis confirmed that ten specific OsMT genes responsible for regulating ROS removal were expressed differentially in plant tissues as well as in Cr variants, suggesting that their different regulation and responsiveness strategies. Expression patterns of metal chelation-related OsMT genes, after Cr exposure were also inconsistent in rice tissues. Longer exposure periods caused more transcriptional changes in both Cr treatments. We also noticed that OsMT1b might carry more weight during Cr chelation in roots rather than in shoots, while OsMT2c had more important role in eliminating H2O2 accumulation in shoots than roots. These results suggest that different speciation of Cr in rice tissues resulted in inconsistent transcriptional changes of OsMT genes, which functioned in different regulation and responsiveness pathways responsible for metal ions chelating and ROS scavenging during Cr detoxification.
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Affiliation(s)
- Xiao-Zhang Yu
- The Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China.
| | - Yu-Juan Lin
- The Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China
| | - Qing Zhang
- The Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China
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11
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Tomàs Giner M, Jiménez-Martí E, Bofill Arasa R, Tinti A, Di Foggia M, Chatgilialoglu C, Torreggiani A. Analysis of the soybean metallothionein system under free radical stress: protein modification connected to lipid membrane damage. Metallomics 2018; 10:1792-1804. [PMID: 30398507 DOI: 10.1039/c8mt00164b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metallothioneins are small Cys-rich peptides capable of coordinating metal ions, and proposed to be involved in radical stress. The four Zn(ii)-GmMT complexes of soybean (Glycine max) were recombinantly synthesised and exposed to oxidative (HO˙) and reductive (H˙ atoms and eaq-) stress conditions. Gamma-irradiation was used to simulate the endogenous formation of the reactive species in both aqueous solutions and unsaturated lipid vesicle suspensions, a biomimetic model that showed that tandem protein/lipid damage occurs, in particular under reductive radical stress. This is due to the formation of diffusible sulphur-centred radicals, which migrate from the aqueous phase to the lipid bilayer and are thus able to transform the cis double bond of the oleate moiety into the trans isomer. Among the amino acid residues present in GmMTs, Cys is one of the most sensitive residues towards the attack of free radicals, thus suggesting metal-clusters to be good interceptors of free radicals. Also Met, Tyr and Phe residues are sensitive amino acid sites of attack under both oxidative and reductive conditions. The modification of the Zn(ii)-GmMT complexes, in particular isoform 2, was monitored by Raman spectroscopy and mass spectrometry. Free radical stress on the Zn(ii)-GmMT complexes is able to induce significant structural changes such as partial deconstruction and/or rearrangement of the metal clusters, but not the complete demetallation of the proteins nor breaking of the backbone, thus confirming their capability to act as protectors under free radical stress conditions.
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Affiliation(s)
- Mireia Tomàs Giner
- Dep. Genètica, Facultat de Biologia, Univ. Barcelona, Av. Diagonal 645, 08028 Barcelona, Catalonia, Spain.
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12
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Xu X, Duan L, Yu J, Su C, Li J, Chen D, Zhang X, Song H, Pan Y. Characterization analysis and heavy metal-binding properties of CsMTL3 in Escherichia coli. FEBS Open Bio 2018; 8:1820-1829. [PMID: 30410861 PMCID: PMC6212650 DOI: 10.1002/2211-5463.12520] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/16/2018] [Accepted: 08/29/2018] [Indexed: 11/30/2022] Open
Abstract
Members of the metallothionein (MT) superfamily are involved in coordinating transition metal ions. In plants, MT family members are characterized by their arrangement of Cys residues. In this study, one member of the MT superfamily, CsMTL3, was characterized from a complementary DNA (cDNA) library from young cucumber fruit; CsMTL3 is predicted to encode a 64 amino acid protein with a predicted molecular mass of 6.751 kDa. Phylogenetic analysis identified it as a type 3 family member as the arrangement of N-terminal Cys residues was different from that of MT-like 2. Heterologous expression of CsMTL3 in Escherichia coli improved their heavy metal tolerance, particularly to Cd2+ and Cu2+, and led to increased uptake of Cd2+ and Cu2+; increased uptake was also observed for cells expressing Arabidopsis thaliana metallothionein 3 (AtMT3) and phytochelatin-like (PCL), with greatest uptake in PCL-expressing cells. These findings demonstrate that CsMTL3 can improve metal tolerance, especially for Cd2+ ions, when heterologously expressed in E. coli, and suggest that the composition and arrangement of N-terminal Cys residues are associated with binding capacity and preference for different metal ions.
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Affiliation(s)
- Xing Xu
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Ling Duan
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Jingwen Yu
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Chenggang Su
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Jinhua Li
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Dan Chen
- Comprehensive Testing Center of Guangzhou Entry‐Exit Inspection & Quarantine BureauGuangzhouChina
| | - Xingguo Zhang
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Hongyuan Song
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Yu Pan
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
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13
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Yu X, Wei S, Yang Y, Ding Z, Wang Q, Zhao J, Liu X, Chu X, Tian J, Wu N, Fan Y. Identification of cadmium-binding proteins from rice (Oryza sativa L.). Int J Biol Macromol 2018; 119:597-603. [DOI: 10.1016/j.ijbiomac.2018.07.190] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/02/2018] [Accepted: 07/30/2018] [Indexed: 01/02/2023]
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14
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Pan Y, Zhu M, Wang S, Ma G, Huang X, Qiao C, Wang R, Xu X, Liang Y, Lu K, Li J, Qu C. Genome-Wide Characterization and Analysis of Metallothionein Family Genes That Function in Metal Stress Tolerance in Brassica napus L. Int J Mol Sci 2018; 19:E2181. [PMID: 30049941 PMCID: PMC6121329 DOI: 10.3390/ijms19082181] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/21/2018] [Accepted: 07/24/2018] [Indexed: 12/23/2022] Open
Abstract
Brassica plants exhibit both high biomass productivity and high rates of heavy metal absorption. Metallothionein (MT) proteins are low molecular weight, cysteine-rich, metal-binding proteins that play crucial roles in protecting plants from heavy metal toxicity. However, to date, MT proteins have not been systematically characterized in Brassica. In this study, we identified 60 MTs from Arabidopsis thaliana and five Brassica species. All the MT family genes from Brassica are closely related to Arabidopsis MTs, encoding putative proteins that share similar functions within the same clades. Genome mapping analysis revealed high levels of synteny throughout the genome due to whole genome duplication and segmental duplication events. We analyzed the expression levels of 16 Brassica napus MTs (BnaMTs) by RNA-sequencing and real-time RT-PCR (RT-qPCR) analysis in plants under As3+ stress. These genes exhibited different expression patterns in various tissues. Our results suggest that BnaMT3C plays a key role in the response to As3+ stress in B. napus. This study provides insight into the phylogeny, origin, and evolution of MT family members in Brassica, laying the foundation for further studies of the roles of MT proteins in these important crops.
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Affiliation(s)
- Yu Pan
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Meichen Zhu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Shuxian Wang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Guoqiang Ma
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Xiaohu Huang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Cailin Qiao
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Rui Wang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Xinfu Xu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Ying Liang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Kun Lu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Jiana Li
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Cunmin Qu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
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15
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Zhou H, Xu J, Wang W. Functional analysis of metallothionein MTT5 from
Tetrahymena thermophila. J Cell Biochem 2018; 119:3257-3266. [DOI: 10.1002/jcb.26482] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/31/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Huanxin Zhou
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuanChina
- School of Environment and SafetyTaiyuan University of Science and TechnologyTaiyuanChina
| | - Jing Xu
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuanChina
| | - Wei Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuanChina
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16
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Hasan MK, Cheng Y, Kanwar MK, Chu XY, Ahammed GJ, Qi ZY. Responses of Plant Proteins to Heavy Metal Stress-A Review. FRONTIERS IN PLANT SCIENCE 2017; 8:1492. [PMID: 28928754 PMCID: PMC5591867 DOI: 10.3389/fpls.2017.01492] [Citation(s) in RCA: 192] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 08/11/2017] [Indexed: 05/17/2023]
Abstract
Plants respond to environmental pollutants such as heavy metal(s) by triggering the expression of genes that encode proteins involved in stress response. Toxic metal ions profoundly affect the cellular protein homeostasis by interfering with the folding process and aggregation of nascent or non-native proteins leading to decreased cell viability. However, plants possess a range of ubiquitous cellular surveillance systems that enable them to efficiently detoxify heavy metals toward enhanced tolerance to metal stress. As proteins constitute the major workhorses of living cells, the chelation of metal ions in cytosol with phytochelatins and metallothioneins followed by compartmentalization of metals in the vacuoles as well as the repair of stress-damaged proteins or removal and degradation of proteins that fail to achieve their native conformations are critical for plant tolerance to heavy metal stress. In this review, we provide a broad overview of recent advances in cellular protein research with regards to heavy metal tolerance in plants. We also discuss how plants maintain functional and healthy proteomes for survival under such capricious surroundings.
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Affiliation(s)
- Md. Kamrul Hasan
- Department of Horticulture, Zhejiang UniversityHangzhou, China
- Department of Agricultural Chemistry, Sylhet Agricultural UniversitySylhet, Bangladesh
| | - Yuan Cheng
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Vegetables, Zhejiang Academy of Agricultural SciencesHangzhou, China
| | | | - Xian-Yao Chu
- Zhejiang Institute of Geological Survey, Geological Research Center for Agricultural Applications, China Geological SurveyBeijing, China
| | | | - Zhen-Yu Qi
- Agricultural Experiment Station, Zhejiang UniversityHangzhou, China
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17
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Ruta LL, Lin YF, Kissen R, Nicolau I, Neagoe AD, Ghenea S, Bones AM, Farcasanu IC. Anchoring plant metallothioneins to the inner face of the plasma membrane of Saccharomyces cerevisiae cells leads to heavy metal accumulation. PLoS One 2017; 12:e0178393. [PMID: 28562640 PMCID: PMC5451056 DOI: 10.1371/journal.pone.0178393] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 05/14/2017] [Indexed: 11/18/2022] Open
Abstract
In this study we engineered yeast cells armed for heavy metal accumulation by targeting plant metallothioneins to the inner face of the yeast plasma membrane. Metallothioneins (MTs) are cysteine-rich proteins involved in the buffering of excess metal ions, especially Cu(I), Zn(II) or Cd(II). The cDNAs of seven Arabidopsis thaliana MTs (AtMT1a, AtMT1c, AtMT2a, AtMT2b, AtMT3, AtMT4a and AtMT4b) and four Noccaea caerulescens MTs (NcMT1, NcMT2a, NcMT2b and NcMT3) were each translationally fused to the C-terminus of a myristoylation green fluorescent protein variant (myrGFP) and expressed in Saccharomyces cerevisiae cells. The myrGFP cassette introduced a yeast myristoylation sequence which allowed directional targeting to the cytosolic face of the plasma membrane along with direct monitoring of the intracellular localization of the recombinant protein by fluorescence microscopy. The yeast strains expressing plant MTs were investigated against an array of heavy metals in order to identify strains which exhibit the (hyper)accumulation phenotype without developing toxicity symptoms. Among the transgenic strains which could accumulate Cu(II), Zn(II) or Cd(II), but also non-canonical metal ions, such as Co(II), Mn(II) or Ni(II), myrGFP-NcMT3 qualified as the best candidate for bioremediation applications, thanks to the robust growth accompanied by significant accumulative capacity.
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Affiliation(s)
| | - Ya-Fen Lin
- Cell, Molecular Biology and Genomics Group, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ralph Kissen
- Cell, Molecular Biology and Genomics Group, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ioana Nicolau
- Faculty of Chemistry, University of Bucharest, Bucharest, Romania
| | | | - Simona Ghenea
- Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Atle M. Bones
- Cell, Molecular Biology and Genomics Group, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
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