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Ran Y, Sun D, Liu X, Zhang L, Niu Z, Chai T, Hu Z, Qiao K. Chlorella pyrenoidosa as a potential bioremediator: Its tolerance and molecular responses to cadmium and lead. Sci Total Environ 2024; 912:168712. [PMID: 38016561 DOI: 10.1016/j.scitotenv.2023.168712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 11/30/2023]
Abstract
Heavy metal contamination negatively affects plants and animals in water as well as soils. Some microalgae can remove heavy metal contaminants from wastewater. The aim of this study was to screen green microalgae (GM) to identify those that tolerate high concentrations of toxic heavy metals in water as possible candidates for phytoremediation. Analyses of the tolerance, physiological parameters, ultrastructure, and transcriptomes of GM under Cd/Pb treatments were conducted. Compared with the other GM, Chlorella pyrenoidosa showed stronger tolerance to high concentrations of Cd/Pb. The reduced glutathione content and peroxidase activity were higher in C. pyrenoidosa than those in the other GM. Ultrastructural observations showed that, compared with other GM, C. pyrenoidosa had less damage to the cell surface and interior under Cd/Pb toxicity. Transcriptome analyses indicated that the "peroxisome" and "sulfur metabolism" pathways were enriched with differentially expressed genes under Cd/Pb treatments, and that CpSAT, CpSBP, CpKAT2, Cp2HPCL, CpACOX, CpACOX2, and CpACOX4, all of which encode antioxidant enzymes, were up-regulated under Cd/Pb treatments. These results show that C. pyrenoidosa has potential applications in the remediation of polluted water, and indicate that antioxidant enzymes contribute to Cd/Pb detoxification. These findings will be useful for producing algal strains for the purpose of bioremediation in water contamination.
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Affiliation(s)
- Ye Ran
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, PR China
| | - Dexiang Sun
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, PR China
| | - Xiang Liu
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, PR China
| | - Ling Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, PR China
| | - Zhiyong Niu
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, PR China
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Zhangli Hu
- Shenzhen Engineering Laboratory for Marine Algal Biotechnology, Guangdong Engineering Research Center for Marine Algal Biotechnology, Longhua Innovation Institute for Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, PR China.
| | - Kun Qiao
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, PR China.
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Yan Y, Zhang Z, Sun H, Liu X, Xie J, Qiu Y, Chai T, Chu C, Hu B. Nitrate confers rice adaptation to high ammonium by suppressing its uptake but promoting its assimilation. Mol Plant 2023; 16:1871-1874. [PMID: 37994015 DOI: 10.1016/j.molp.2023.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 11/24/2023]
Affiliation(s)
- Yu Yan
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhihua Zhang
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China
| | - Huwei Sun
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Key Laboratory for Enhancing Resource Use Efficiency of Crops in South China, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China
| | - Xiujie Liu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Junpeng Xie
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Yahong Qiu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Chengcai Chu
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China; Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Key Laboratory for Enhancing Resource Use Efficiency of Crops in South China, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China.
| | - Bin Hu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Key Laboratory for Enhancing Resource Use Efficiency of Crops in South China, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China.
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3
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Guan J, Yang Y, Shan Q, Zhang H, Zhou A, Gong S, Chai T, Qiao K. Plant cadmium resistance 10 enhances tolerance to toxic heavy metals in poplar. Plant Physiol Biochem 2023; 203:108043. [PMID: 37734271 DOI: 10.1016/j.plaphy.2023.108043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/01/2023] [Accepted: 09/15/2023] [Indexed: 09/23/2023]
Abstract
Toxic heavy metals originating from human activities have caused irreversible harm to the environment. Toxic heavy metal ions absorbed by crop plants can seriously threaten human health. Therefore, decreasing heavy metal contents in crop plants is an urgent need. The plant cadmium resistance protein (PCR) is a heavy metal ion transporter. In this study, PePCR10 was cloned from Populus euphratica. Bioinformatics analyses revealed its transmembrane structure and gene sequence motifs. The transcript profile of PePCR10 was analyzed by RT-qPCR, and its transcript levels increased under toxic heavy metal (cadmium, lead, aluminum) treatments. Subcellular localization analyses in tobacco cells revealed that PePCR10 localizes at the plasma membrane. Compared with wild type (WT), PePCR10-overexpressing lines showed significantly higher values for plant height, root length, fresh weight, and dry weight under heavy metal stress. Electrolyte leakage, nitroblue tetrazolium staining, and chlorophyll fluorescence analyses indicated that Cd/Al tolerance in PePCR10-overexpressing lines was stronger than that in WT. The Cd/Al contents were lower in the PePCR10-overexpressing lines than in WT under Cd/Al stress. Our results show that PePCR10 can reduce the heavy metal content in poplar and enhance its Cd/Al tolerance. Hence, PePCR10 is a candidate genetic resource for effectively reducing heavy metal accumulation in crops.
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Affiliation(s)
- Jing Guan
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Yahan Yang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Qinghua Shan
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Haizhen Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Aimin Zhou
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shufang Gong
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Kun Qiao
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, PR China.
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Shan Q, Yang Y, Guan J, Chai T, Gong S, Wang J, Qiao K. New potential transporter CIPAS8 enhances cadmium hypersensitivity and cobalt tolerance. Plant Cell Rep 2023:10.1007/s00299-023-03027-4. [PMID: 37199753 DOI: 10.1007/s00299-023-03027-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 05/04/2023] [Indexed: 05/19/2023]
Abstract
KEY MESSAGE CIPAS8 is a novel Cd-influx and Co-efflux transporters, and Ser86 and Cys128 might play a decisive role in Co-binding and translocation. Cadmium (Cd) is among the most toxic heavy metals and is a widespread environmental pollutant. Cobalt (Co) is a mineral nutrient that is essential for plant growth and development, but high concentrations may be toxic. Cadmium-induced protein AS8 (CIPAS8) is widely distributed among plant species and might be induced by heavy metals, but its function has not been studied previously. In this study, Populus euphratica PeCIPAS8 and Salix linearistipularis SlCIPAS8 were investigated. The transcription of both genes was significantly enhanced under Cd and Co stresses. PeCIPAS8 and SlCIPAS8 conferred sensitivity to Cd in transgenic yeast, allowing higher quantities of Cd to accumulate within the cells, whereas SlCIPAS8 also conferred tolerance to Co and reduced Co accumulation. The determinants of substrate selectivity of the SlCIPAS8 protein were examined by site mutagenesis, which indicated that the Ser at 86th (S86) substituted for Arg (R) [S86R] and Cys at 128th (C128) substituted for Ser [C128S] mutations limited the protein's capability for Co translocation. These results suggested that PeCIPAS8 and SlCIPAS8 may be involved in Cd uptake into the plant cell. SlCIPAS8 can reduce excess Co accumulation to maintain intracellular Co homeostasis, and the site mutations S86R and C128S were essential for Co transport. These findings provide insight into the function of CIPAS8 and highlight its potential for utilization in phytoremediation applications.
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Affiliation(s)
- Qinghua Shan
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yahan Yang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jing Guan
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Shufang Gong
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jingang Wang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Kun Qiao
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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Li J, Zhang B, Duan P, Yan L, Yu H, Zhang L, Li N, Zheng L, Chai T, Xu R, Li Y. An endoplasmic reticulum-associated degradation-related E2-E3 enzyme pair controls grain size and weight through the brassinosteroid signaling pathway in rice. Plant Cell 2023; 35:1076-1091. [PMID: 36519262 PMCID: PMC10015164 DOI: 10.1093/plcell/koac364] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/08/2022] [Accepted: 12/12/2022] [Indexed: 05/16/2023]
Abstract
Grain size is an important agronomic trait, but our knowledge about grain size determination in crops is still limited. Endoplasmic reticulum (ER)-associated degradation (ERAD) is a special ubiquitin proteasome system that is involved in degrading misfolded or incompletely folded proteins in the ER. Here, we report that SMALL GRAIN 3 (SMG3) and DECREASED GRAIN SIZE 1 (DGS1), an ERAD-related E2-E3 enzyme pair, regulate grain size and weight through the brassinosteroid (BR) signaling pathway in rice (Oryza sativa). SMG3 encodes a homolog of Arabidopsis (Arabidopsis thaliana) UBIQUITIN CONJUGATING ENZYME 32, which is a conserved ERAD-associated E2 ubiquitin conjugating enzyme. SMG3 interacts with another grain size regulator, DGS1. Loss of function of SMG3 or DGS1 results in small grains, while overexpression of SMG3 or DGS1 leads to long grains. Further analyses showed that DGS1 is an active E3 ubiquitin ligase and colocates with SMG3 in the ER. SMG3 and DGS1 are involved in BR signaling. DGS1 ubiquitinates the BR receptor BRASSINOSTEROID INSENSITIVE 1 (BRI1) and affects its accumulation. Genetic analysis suggests that SMG3, DGS1, and BRI1 act together to regulate grain size and weight. In summary, our findings identify an ERAD-related E2-E3 pair that regulates grain size and weight, which gives insight into the function of ERAD in grain size control and BR signaling.
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Affiliation(s)
- Jing Li
- College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Baolan Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Penggen Duan
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Li Yan
- College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Haiyue Yu
- College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Limin Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Na Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Leiying Zheng
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Tuanyao Chai
- College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ran Xu
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
- College of Tropical Crops Hainan University, Hainan University, Haikou 570288, China
| | - Yunhai Li
- College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- The Innovative of Seed Design, Chinese Academy of Sciences, Sanya 572025, China
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Maurer C, Galmarini S, Solazzo E, Kuśmierczyk-Michulec J, Baré J, Kalinowski M, Schoeppner M, Bourgouin P, Crawford A, Stein A, Chai T, Ngan F, Malo A, Seibert P, Axelsson A, Ringbom A, Britton R, Davies A, Goodwin M, Eslinger PW, Bowyer TW, Glascoe LG, Lucas DD, Cicchi S, Vogt P, Kijima Y, Furuno A, Long PK, Orr B, Wain A, Park K, Suh KS, Quérel A, Saunier O, Quélo D. Third international challenge to model the medium- to long-range transport of radioxenon to four Comprehensive Nuclear-Test-Ban Treaty monitoring stations. J Environ Radioact 2022; 255:106968. [PMID: 36148707 DOI: 10.1016/j.jenvrad.2022.106968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 07/08/2022] [Accepted: 07/15/2022] [Indexed: 06/16/2023]
Abstract
In 2015 and 2016, atmospheric transport modeling challenges were conducted in the context of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) verification, however, with a more limited scope with respect to emission inventories, simulation period and number of relevant samples (i.e., those above the Minimum Detectable Concentration (MDC)) involved. Therefore, a more comprehensive atmospheric transport modeling challenge was organized in 2019. Stack release data of Xe-133 were provided by the Institut National des Radioéléments/IRE (Belgium) and the Canadian Nuclear Laboratories/CNL (Canada) and accounted for in the simulations over a three (mandatory) or six (optional) months period. Best estimate emissions of additional facilities (radiopharmaceutical production and nuclear research facilities, commercial reactors or relevant research reactors) of the Northern Hemisphere were included as well. Model results were compared with observed atmospheric activity concentrations at four International Monitoring System (IMS) stations located in Europe and North America with overall considerable influence of IRE and/or CNL emissions for evaluation of the participants' runs. Participants were prompted to work with controlled and harmonized model set-ups to make runs more comparable, but also to increase diversity. It was found that using the stack emissions of IRE and CNL with daily resolution does not lead to better results than disaggregating annual emissions of these two facilities taken from the literature if an overall score for all stations covering all valid observed samples is considered. A moderate benefit of roughly 10% is visible in statistical scores for samples influenced by IRE and/or CNL to at least 50% and there can be considerable benefit for individual samples. Effects of transport errors, not properly characterized remaining emitters and long IMS sampling times (12-24 h) undoubtedly are in contrast to and reduce the benefit of high-quality IRE and CNL stack data. Complementary best estimates for remaining emitters push the scores up by 18% compared to just considering IRE and CNL emissions alone. Despite the efforts undertaken the full multi-model ensemble built is highly redundant. An ensemble based on a few arbitrary runs is sufficient to model the Xe-133 background at the stations investigated. The effective ensemble size is below five. An optimized ensemble at each station has on average slightly higher skill compared to the full ensemble. However, the improvement (maximum of 20% and minimum of 3% in RMSE) in skill is likely being too small for being exploited for an independent period.
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Affiliation(s)
- C Maurer
- Zentralanstalt für Meteorologie und Geodynamik (ZAMG), Vienna, Austria.
| | - S Galmarini
- European Commission - Joint Research Center (JRC), Ispra VA, Italy
| | - E Solazzo
- European Commission - Joint Research Center (JRC), Ispra VA, Italy
| | | | - J Baré
- Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), Vienna, Austria
| | - M Kalinowski
- Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), Vienna, Austria
| | - M Schoeppner
- Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), Vienna, Austria
| | - P Bourgouin
- Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), Vienna, Austria
| | - A Crawford
- National Oceanic and Atmospheric Administration Air Resources Laboratory (NOAA-ARL), College Park, MD, USA
| | - A Stein
- National Oceanic and Atmospheric Administration Air Resources Laboratory (NOAA-ARL), College Park, MD, USA
| | - T Chai
- National Oceanic and Atmospheric Administration Air Resources Laboratory (NOAA-ARL), College Park, MD, USA
| | - F Ngan
- National Oceanic and Atmospheric Administration Air Resources Laboratory (NOAA-ARL), College Park, MD, USA
| | - A Malo
- Environment and Climate Change Canada (ECCC), Meteorological Service of Canada, Canadian Meteorological Centre (CMC), Environmental Emergency Response Section, RSMC Montréal, Dorval, Québec, Canada
| | - P Seibert
- University of Natural Resources and Life Sciences (BOKU), Institute of Meteorology and Climatology, Vienna, Austria
| | - A Axelsson
- Swedish Defence Research Agency (FOI), Stockholm, Sweden
| | - A Ringbom
- Swedish Defence Research Agency (FOI), Stockholm, Sweden
| | - R Britton
- Atomic Weapons Establishment/United Kingdom-National Data Center (AWE/UK-NDC), Aldermaston, Reading, United Kingdom
| | - A Davies
- Atomic Weapons Establishment/United Kingdom-National Data Center (AWE/UK-NDC), Aldermaston, Reading, United Kingdom
| | - M Goodwin
- Atomic Weapons Establishment/United Kingdom-National Data Center (AWE/UK-NDC), Aldermaston, Reading, United Kingdom
| | - P W Eslinger
- Pacific Northwest National Laboratory (PNNL), Richland, WA, USA
| | - T W Bowyer
- Pacific Northwest National Laboratory (PNNL), Richland, WA, USA
| | - L G Glascoe
- National Atmospheric Release Advisory Center (NARAC) at the Lawrence Livermore National Laboratory (LLNL), Livermore, CA, USA
| | - D D Lucas
- National Atmospheric Release Advisory Center (NARAC) at the Lawrence Livermore National Laboratory (LLNL), Livermore, CA, USA
| | - S Cicchi
- National Atmospheric Release Advisory Center (NARAC) at the Lawrence Livermore National Laboratory (LLNL), Livermore, CA, USA
| | - P Vogt
- National Atmospheric Release Advisory Center (NARAC) at the Lawrence Livermore National Laboratory (LLNL), Livermore, CA, USA
| | - Y Kijima
- Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, Japan
| | - A Furuno
- Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, Japan
| | - P K Long
- Vietnam Atomic Energy Institute (VINATOM), Hanoi, Vietnam
| | - B Orr
- Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Yallambie/Miranda, Australia
| | - A Wain
- Bureau of Meteorology (BOM), Melbourne, Australia
| | - K Park
- Korea Atomic Energy Research Institute (KAERI), Daejeon, Republic of Korea
| | - K-S Suh
- Korea Atomic Energy Research Institute (KAERI), Daejeon, Republic of Korea
| | - A Quérel
- French Institute for Radiation Protection and Nuclear Safety (IRSN), Fontenay-aux-Roses, France
| | - O Saunier
- French Institute for Radiation Protection and Nuclear Safety (IRSN), Fontenay-aux-Roses, France
| | - D Quélo
- French Institute for Radiation Protection and Nuclear Safety (IRSN), Fontenay-aux-Roses, France
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Gu M, Lu Q, Liu Y, Cui M, Si Y, Wu H, Chai T, Ling HQ. Requirement and functional redundancy of two large ribonucleotide reductase subunit genes for cell cycle, chloroplast biogenesis and photosynthesis in tomato. Ann Bot 2022; 130:173-187. [PMID: 35700127 PMCID: PMC9445600 DOI: 10.1093/aob/mcac078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND AND AIMS Ribonucleotide reductase (RNR), functioning in the de novo synthesis of deoxyribonucleoside triphosphates (dNTPs), is crucial for DNA replication and cell cycle progression. In most plants, the large subunits of RNR have more than one homologous gene. However, the different functions of these homologous genes in plant development remain unknown. In this study, we obtained the mutants of two large subunits of RNR in tomato and studied their functions. METHODS The mutant ylc1 was obtained by ethyl methyl sulfonate (EMS) treatment. Through map-based cloning, complementation and knock-out experiments, it was confirmed that YLC1 encodes a large subunit of RNR (SlRNRL1). The expression level of the genes related to cell cycle progression, chloroplast biogenesis and photosynthesis was assessed by RNA-sequencing. In addition, we knocked out SlRNRL2 (a SlRNRL1 homologue) using CRISPR-Cas9 technology in the tomato genome, and we down-regulated SlRNRL2 expression in the genetic background of slrnrl1-1 using a tobacco rattle virus-induced gene silencing (VIGS) system. KEY RESULTS The mutant slrnrl1 exhibited dwarf stature, chlorotic young leaves and smaller fruits. Physiological and transcriptomic analyses indicated that SlRNRL1 plays a crucial role in the regulation of cell cycle progression, chloroplast biogenesis and photosynthesis in tomato. The slrnrl2 mutant did not exhibit any visible phenotype. SlRNRL2 has a redundant function with SlRNRL1, and the double mutant slrnrl1slrnrl2 is lethal. CONCLUSIONS SlRNRL1 is essential for cell cycle progression, chloroplast biogenesis and photosynthesis. In addition, SlRNRL1 and SlRNRL2 possess redundant functions and at least one of these RNRLs is required for tomato survival, growth and development.
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Affiliation(s)
| | | | - Yi Liu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi, China
| | - Man Cui
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yaoqi Si
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | | | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
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8
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Khan MS, Lu Q, Cui M, Rajab H, Wu H, Chai T, Ling HQ. Crosstalk Between Iron and Sulfur Homeostasis Networks in Arabidopsis. Front Plant Sci 2022; 13:878418. [PMID: 35755678 PMCID: PMC9224419 DOI: 10.3389/fpls.2022.878418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
The widespread deficiency of iron (Fe) and sulfur (S) is becoming a global concern. The underlying mechanisms regulating Fe and S sensing and signaling have not been well understood. We investigated the crosstalk between Fe and S using mutants impaired in Fe homeostasis, sulfate assimilation, and glutathione (GSH) biosynthesis. We showed that chlorosis symptoms induced by Fe deficiency were not directly related to the endogenous GSH levels. We found dynamic crosstalk between Fe and S networks and more interestingly observed that the upregulated expression of IRT1 and FRO2 under S deficiency in Col-0 was missing in the cad2-1 mutant background, which suggests that under S deficiency, the expression of IRT1 and FRO2 was directly or indirectly dependent on GSH. Interestingly, the bottleneck in sulfite reduction led to a constitutively higher IRT1 expression in the sir1-1 mutant. While the high-affinity sulfate transporter (Sultr1;2) was upregulated under Fe deficiency in the roots, the low-affinity sulfate transporters (Sultr2;1, and Sultr2;2) were down-regulated in the shoots of Col-0 seedlings. Moreover, the expression analysis of some of the key players in the Fe-S cluster assembly revealed that the expression of the so-called Fe donor in mitochondria (AtFH) and S mobilizer of group II cysteine desulfurase in plastids (AtNFS2) were upregulated under Fe deficiency in Col-0. Our qPCR data and ChIP-qPCR experiments suggested that the expression of AtFH is likely under the transcriptional regulation of the central transcription factor FIT.
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Affiliation(s)
- Muhammad Sayyar Khan
- The State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- Institute of Biotechnology and Genetic Engineering, The University of Agriculture Peshawar, Peshawar, Pakistan
| | - Qiao Lu
- The State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Man Cui
- The State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Hala Rajab
- Institute of Biotechnology and Genetic Engineering, The University of Agriculture Peshawar, Peshawar, Pakistan
| | - Huilan Wu
- The State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Hong-Qing Ling
- The State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
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9
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Wang F, Qiao K, Wang H, Wang H, Chai T. MTP8 from Triticum urartu Is Primarily Responsible for Manganese Tolerance. Int J Mol Sci 2022; 23:ijms23105683. [PMID: 35628492 PMCID: PMC9144917 DOI: 10.3390/ijms23105683] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/15/2022] [Accepted: 05/16/2022] [Indexed: 12/10/2022] Open
Abstract
Mineral nutrients, such as manganese (Mn) and iron (Fe), play essential roles in many biological processes in plants but their over-enrichment is harmful for the metabolism. Metal tolerance proteins (MTPs) are involved in cellular Mn and Fe homeostasis. However, the transporter responsible for the transport of Mn in wheat is unknown. In our study, TuMTP8, a Mn-CDF transporter from diploid wheat (Triticum urartu), was identified. Expression of TuMTP8 in yeast strains of Δccc1 and Δsmf1 and Arabidopsis conferred tolerance to elevated Mn and Fe, but not to other metals (zinc, cobalt, copper, nickel, or cadmium). Compared with TuVIT1 (vacuole Fe transporter), TuMTP8 shows a significantly higher proportion in Mn transport and a smaller proportion in Fe transport. The transient analysis in tobacco epidermal cells revealed that TuMTP8 localizes to vacuolar membrane. The highest transcript levels of TuMTP8 were in the sheath of the oldest leaf and the awn, suggesting that TuMTP8 sequesters excess Mn into the vacuole in these organs, away from more sensitive tissues. These findings indicate that TuMTP8, a tonoplast-localized Mn/Fe transporter, functions as a primary balancer to regulate Mn distribution in T. urartu under elevated Mn conditions and participates in the intracellular transport and storage of excess Mn as a detoxification mechanism, thereby conferring Mn tolerance.
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Affiliation(s)
- Fanhong Wang
- College of Life Sciences, Northwest Normal University, Lanzhou 730070, China;
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
| | - Kun Qiao
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China;
| | - Huanhuan Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
- Correspondence: (H.W.); (T.C.); Tel./Fax: +86-10-88256343 (T.C.)
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
- The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (H.W.); (T.C.); Tel./Fax: +86-10-88256343 (T.C.)
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10
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Wang G, Wang X, Ma H, Fan H, Lin F, Chen J, Chai T, Wang H. PcWRKY11, an II-d WRKY Transcription Factor from Polygonum cuspidatum, Enhances Salt Tolerance in Transgenic Arabidopsis thaliana. Int J Mol Sci 2022; 23:ijms23084357. [PMID: 35457178 PMCID: PMC9025145 DOI: 10.3390/ijms23084357] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/11/2022] [Accepted: 04/12/2022] [Indexed: 02/04/2023] Open
Abstract
Being an invasive plant, Polygonum cuspidatum is highly resilient and can survive in unfavorable environments for long periods; however, its molecular mechanisms associated with such environmental resistance are largely unknown. In this study, a WRKY transcription factor (TF) gene, PcWRKY11, was identified from P. cuspidatum by analyzing methyl jasmonate (MeJA)-treated transcriptome data. It showed a high degree of homology with WRKY11 from Arabidopsis thaliana, containing a WRKY domain and a zinc finger structure and II-d WRKY characteristic domains of HARF, a calmodulin-binding domain (C-motif), and a putative nuclear localization signal (NLS) through sequence alignment and functional element mining. qPCR analysis showed that the expression of PcWRKY11 can be induced by NaCl, osmotic stress, and UV-C. In this study, we also found that overexpression of PcWRKY11 in A. thaliana could significantly increase salt tolerance. To explore its possible molecular mechanism, further investigations showed that compared with the wild type (WT), under salt stress, the transgenic plants showed a lower malondialdehyde (MDA) content, higher expression of ascorbate peroxidase (APX) and superoxide dismutase (SOD), and higher enzyme activity of peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT). Moreover, the transgenic plants also showed higher expression of Δ1-pyrroline-5-carboxylate synthase (AtP5CS), and higher contents of proline and soluble sugar. Taken together, these results indicate that PcWRKY11 may have a positive role in plants’ adaptation to salinity conditions by reducing reactive oxygen species (ROS) levels and increasing osmosis substance synthesis.
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Affiliation(s)
- Guowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
| | - Xiaowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
| | - Hongping Ma
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
| | - Haili Fan
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
| | - Fan Lin
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
| | - Jianhui Chen
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beichen West Road, Beijing 100101, China
- Correspondence: (T.C.); (H.W.); Tel.: +86-1069672628 (H.W.)
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China; (G.W.); (X.W.); (H.M.); (H.F.); (F.L.); (J.C.)
- Correspondence: (T.C.); (H.W.); Tel.: +86-1069672628 (H.W.)
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11
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Guo Y, Nassar S, Ma L, Feng G, Li X, Chen M, Chai T, Abdel-Rahman IAM, Beuerle T, Beerhues L, Wang H, Liu B. Erratum to: Octaketide Synthase from Polygonum cuspidatum Implements Emodin Biosynthesis in Arabidopsis thaliana. Plant Cell Physiol 2021; 62:743. [PMID: 34409444 PMCID: PMC8462374 DOI: 10.1093/pcp/pcab058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
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12
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Guo Y, Nassar S, Ma L, Feng G, Li X, Chen M, Chai T, Abdel-Rahman IAM, Beuerle T, Beerhues L, Wang H, Liu B. Octaketide Synthase from Polygonum cuspidatum Implements Emodin Biosynthesis in Arabidopsis thaliana. Plant Cell Physiol 2021; 62:424-435. [PMID: 33537755 PMCID: PMC8286135 DOI: 10.1093/pcp/pcaa135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 10/18/2020] [Indexed: 06/12/2023]
Abstract
Plant anthranoids are medicinally used for their purgative properties. Their scaffold was believed to be formed by octaketide synthase (OKS), a member of the superfamily of type III polyketide synthase (PKS) enzymes. Here, a cDNA encoding OKS of Polygonum cuspidatum was isolated using a homology-based cloning strategy. When produced in Escherichia coli, P. cuspidatum octaketide synthase (PcOKS) catalyzed the condensation of eight molecules of malonyl-CoA to yield a mixture of unphysiologically folded aromatic octaketides. However, when the ORF for PcOKS was expressed in Arabidopsis thaliana, the anthranoid emodin was detected in the roots of transgenic lines. No emodin was found in the roots of wild-type A. thaliana. This result indicated that OKS is the key enzyme of plant anthranoids biosynthesis. In addition, the root growth of the transgenic A. thaliana lines was inhibited to an extent that resembled the inhibitory effect of exogenous emodin on the root growth of wild-type A. thaliana. Immunochemical studies of P. cuspidatum plants detected PcOKS mainly in roots and rhizome, in which anthranoids accumulate. Co-incubation of E. coli - produced PcOKS and cell-free extract of wild-type A. thaliana roots did not form a new product, suggesting an alternative, physiological folding of PcOKS and its possible interaction with additional factors needed for anthranoids assembling in transgenic A. thaliana. Thus, transgenic A. thaliana plants producing PcOKS provide an interesting system for elucidating the route of plant anthranoid biosynthesis.
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Affiliation(s)
- Yanwu Guo
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
| | - Sara Nassar
- Institute of Pharmaceutical Biology, Technische Universität Braunschweig, Mendelssohnstrasse 1, Braunschweig 38106, Germany
| | - Lanqing Ma
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
| | - Guanping Feng
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
| | - Xing Li
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
| | - Mo Chen
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Tuanyao Chai
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Iman A M Abdel-Rahman
- Institute of Pharmaceutical Biology, Technische Universität Braunschweig, Mendelssohnstrasse 1, Braunschweig 38106, Germany
| | - Till Beuerle
- Institute of Pharmaceutical Biology, Technische Universität Braunschweig, Mendelssohnstrasse 1, Braunschweig 38106, Germany
| | - Ludger Beerhues
- Institute of Pharmaceutical Biology, Technische Universität Braunschweig, Mendelssohnstrasse 1, Braunschweig 38106, Germany
| | - Hong Wang
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
| | - Benye Liu
- Institute of Pharmaceutical Biology, Technische Universität Braunschweig, Mendelssohnstrasse 1, Braunschweig 38106, Germany
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13
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Wang X, Hu H, Wu Z, Fan H, Wang G, Chai T, Wang H. Tissue-specific transcriptome analyses reveal candidate genes for stilbene, flavonoid and anthraquinone biosynthesis in the medicinal plant Polygonum cuspidatum. BMC Genomics 2021; 22:353. [PMID: 34000984 PMCID: PMC8127498 DOI: 10.1186/s12864-021-07658-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 04/28/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Polygonum cuspidatum Sieb. et Zucc. is a well-known medicinal plant whose pharmacological effects derive mainly from its stilbenes, anthraquinones, and flavonoids. These compounds accumulate differentially in the root, stem, and leaf; however, the molecular basis of such tissue-specific accumulation remains poorly understood. Because tissue-specific accumulation of compounds is usually associated with tissue-specific expression of the related biosynthetic enzyme genes and regulators, we aimed to clarify and compare the transcripts expressed in different tissues of P. cuspidatum in this study. RESULTS High-throughput RNA sequencing was performed using three different tissues (the leaf, stem, and root) of P. cuspidatum. In total, 80,981 unigenes were obtained, of which 40,729 were annotated, and 21,235 differentially expressed genes were identified. Fifty-four candidate synthetase genes and 12 transcription factors associated with stilbene, flavonoid, and anthraquinone biosynthetic pathways were identified, and their expression levels in the three different tissues were analyzed. Phylogenetic analysis of polyketide synthase gene families revealed two novel CHS genes in P. cuspidatum. Most phenylpropanoid pathway genes were predominantly expressed in the root and stem, while methylerythritol 4-phosphate and isochorismate pathways for anthraquinone biosynthesis were dominant in the leaf. The expression patterns of synthase genes were almost in accordance with metabolite profiling in different tissues of P. cuspidatum as measured by high-performance liquid chromatography or ultraviolet spectrophotometry. All predicted transcription factors associated with regulation of the phenylpropanoid pathway were expressed at lower levels in the stem than in the leaf and root, but no consistent trend in their expression was observed between the leaf and the root. CONCLUSIONS The molecular knowledge of key genes involved in the biosynthesis of P. cuspidatum stilbenes, flavonoids, and anthraquinones is poor. This study offers some novel insights into the biosynthetic regulation of bioactive compounds in different P. cuspidatum tissues and provides valuable resources for the potential metabolic engineering of this important medicinal plant.
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Affiliation(s)
- Xiaowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Hongyan Hu
- College of Life Sciences, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Zhijun Wu
- School of Life Sciences and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
| | - Haili Fan
- College of Life Sciences, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Guowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China.
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14
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Wang T, Xiao S, Zhao L, Chai T, Fang X, Lin R, Li T. P37.23 Real-World PD-L1 Expression in Lung Cancer and its Correlation with Driver Mutations. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Fan R, Chai Z, Xing S, Chen K, Qiu F, Chai T, Qiu JL, Zhang Z, Zhang H, Gao C. Shortening the sgRNA-DNA interface enables SpCas9 and eSpCas9(1.1) to nick the target DNA strand. Sci China Life Sci 2020; 63:1619-1630. [PMID: 32592086 DOI: 10.1007/s11427-020-1722-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 05/01/2020] [Indexed: 01/01/2023]
Abstract
The length of the sgRNA-DNA complementary sequence is a key factor influencing the cleavage activity of Streptococcus pyogenes Cas9 (SpCas9) and its variants. The detailed mechanism remains unknown. Here, based on in vitro cleavage assays and base editing analysis, we demonstrate that reducing the length of this complementary region can confer nickase activity on SpCas9 and eSpCas9(1.1). We also show that these nicks are made on the target DNA strand. These properties encouraged us to develop a dual-functional system that simultaneously carries out double-strand DNA cleavage and C-to-T base conversions at separate targets. This system provides a novel tool for achieving trait stacking in plants.
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Affiliation(s)
- Rong Fan
- Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water-Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, 050022, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhuangzhuang Chai
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Sinian Xing
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Kunling Chen
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Fengti Qiu
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jin-Long Qiu
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zhengbin Zhang
- Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water-Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, 050022, China.
| | - Huawei Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Caixia Gao
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China.
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
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16
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Ayyagari R, Liu B, Staib L, Powell T, Chapiro J, Bhatia S, Chai T. 4:12 PM Abstract No. 344 Stratified subscore analysis of International Prostate Symptom Score improvement after prostatic artery embolization with 100- to 300-μm microspheres for lower urinary tract symptoms. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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17
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Tian S, Liang S, Qiao K, Wang F, Zhang Y, Chai T. Co-expression of multiple heavy metal transporters changes the translocation, accumulation, and potential oxidative stress of Cd and Zn in rice (Oryza sativa). J Hazard Mater 2019; 380:120853. [PMID: 31279944 DOI: 10.1016/j.jhazmat.2019.120853] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 05/20/2019] [Accepted: 06/29/2019] [Indexed: 05/07/2023]
Abstract
The OsHMA2, OsLCT1 and OsZIP3 transporters were all involved in zinc (Zn) and cadmium (Cd) transport. So far, only a few researches studied on the co-regulation effect of three transporters related to Zn and Cd transport. The present study showed that rice co-expressing OsLCT1-OsHMA2-OsZIP3 (LHZ) had longer roots and shoots than wild-type (WT) rice after Zn and Cd treatments. The chlorophyll content was significantly higher, and the proline, malondialdehyde and H2O2 contents were significantly lower in co-transgenic lines than in WT under Cd and Zn stress. LHZ in the seedlings of transgenic rice decreased the root-to-shoot translocation of Cd after Cd and Zn treatments. At the filling stage, LHZ line reduced Cd accumulation in grain after Cd treatment. Moreover, LHZ line increased the translocation of Zn to grain and reduced the accumulation of Cd after Zn treatment. These results suggested that LHZ co-expression could effectively decrease the translocation and accumulation of Cd to grains, alleviated the oxidative stress of Cd and Zn, and finally enhanced the quality and safety of rice grains.
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Affiliation(s)
- Siqi Tian
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Shuang Liang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Kun Qiao
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Fanhong Wang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Yuxiu Zhang
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China.
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18
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Wang X, Wu Z, Bao W, Hu H, Chen M, Chai T, Wang H. Identification and evaluation of reference genes for quantitative real-time PCR analysis in Polygonum cuspidatum based on transcriptome data. BMC Plant Biol 2019; 19:498. [PMID: 31726985 PMCID: PMC6854638 DOI: 10.1186/s12870-019-2108-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 10/30/2019] [Indexed: 05/06/2023]
Abstract
BACKGROUND Polygonum cuspidatum of the Polygonaceae family is a traditional medicinal plant with many bioactive compounds that play important roles in human health and stress responses. Research has attempted to identify biosynthesis genes and metabolic pathways in this species, and quantitative real-time PCR (RT-qPCR) has commonly been used to detect gene expression because of its speed, sensitivity, and specificity. However, no P. cuspidatum reference genes have been identified, which hinders gene expression studies. Here, we aimed to identify suitable reference genes for accurate and reliable normalization of P. cuspidatum RT-qPCR data. RESULTS Twelve candidate reference genes, including nine common (ACT, TUA, TUB, GAPDH, EF-1γ, UBQ, UBC, 60SrRNA, and eIF6A) and three novel (SKD1, YLS8, and NDUFA13), were analyzed in different tissues (root, stem, and leaf) without treatment and in leaves under abiotic stresses (salt, ultraviolet [UV], cold, heat, and drought) and hormone stimuli (abscisic acid [ABA], ethylene [ETH], gibberellin [GA3], methyl jasmonate [MeJA], and salicylic acid [SA]). Expression stability in 65 samples was calculated using the △CT method, geNorm, NormFinder, BestKeeper, and RefFinder. Two reference genes (NDUFA13 and EF-1γ) were sufficient to normalize gene expression across all sample sets. They were also the two most stable genes for abiotic stresses and different tissues, whereas NDUFA13 and SKD1 were the top two choices for hormone stimuli. Considering individual experimental sets, GAPDH was the top-ranked gene under ABA, ETH, and GA3 treatments, while 60SrRNA showed good stability under MeJA and cold treatments. ACT, UBC, and TUB were suitable genes for drought, UV, and ABA treatments, respectively. TUA was not suitable because of its considerable variation in expression under different conditions. The expression patterns of PcPAL, PcSTS, and PcMYB4 under UV and SA treatments and in different tissues normalized by stable and unstable reference genes demonstrated the suitability of the optimal reference genes. CONCLUSIONS We propose NDUFA13 and EF-1γ as reference genes to normalize P. cuspidatum expression data. To our knowledge, this is the first systematic study of reference genes in P. cuspidatum which could help advance molecular biology research in P. cuspidatum and allied species.
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Affiliation(s)
- Xiaowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhijun Wu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenqi Bao
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hongyan Hu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mo Chen
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
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Ma K, Zhang Y, Ruan M, Guo J, Chai T. Land Subsidence in a Coal Mining Area Reduced Soil Fertility and Led to Soil Degradation in Arid and Semi-Arid Regions. Int J Environ Res Public Health 2019; 16:ijerph16203929. [PMID: 31623103 PMCID: PMC6843680 DOI: 10.3390/ijerph16203929] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/13/2019] [Accepted: 10/14/2019] [Indexed: 12/05/2022]
Abstract
Underground coal mining in western China causes heavy land subsidence and alters the soil ecology. However, the effects of land subsidence on soil fertility are not currently known, and the key factors governing its impact remain unclear in sandy land. We investigated the effects of land subsidence induced by underground mining on the soil quality in western China. Soil samples were collected at 0–15 cm and 15–30 cm from control and subsidence areas in three coal mines. The results showed that the soil water content (SWC), clay and silt percentage, total nitrogen (TN), dissolved organic carbon (DOC), ammonia nitrogen (NH4+-N), nitrate nitrogen (NO3--N), available phosphorus (AP), and available potassium (AK) of the subsidence areas were significantly lower than those of the control areas. The saccharase, urease, and alkaline phosphatase activities in the subsidence areas decreased compared to those in the control areas, while the sand percentage of soil tended to increase. Soil nutrient contents, bacterial quantities, and activities of soil enzymes were positively correlated with SWC. Redundancy analysis (RDA) showed that the soil particle size distribution, SWC, and electrical conductivity (EC) were the major environmental factors driving changes in soil properties. These results indicated that land subsidence induced by coal mining caused losses in surface soil water and nutrients, and ultimately led to soil quality degradation. Therefore, the reclamation of mining subsidence land might be necessary, especially in arid and semi-arid areas.
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Affiliation(s)
- Kang Ma
- School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
| | - Yuxiu Zhang
- School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
| | - Mengying Ruan
- School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
| | - Jing Guo
- School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
| | - Tuanyao Chai
- College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China.
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20
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Qiao K, Wang F, Liang S, Wang H, Hu Z, Chai T. New Biofortification Tool: Wheat TaCNR5 Enhances Zinc and Manganese Tolerance and Increases Zinc and Manganese Accumulation in Rice Grains. J Agric Food Chem 2019; 67:9877-9884. [PMID: 31398030 DOI: 10.1021/acs.jafc.9b04210] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Heavy metal contaminants and nutrient deficiencies in soil negatively affect crop growth and human health. The plant cadmium resistance (PCR) protein transports heavy metals. The abundance of PCR is correlated with that of cell number regulator (CNR) protein, and the two proteins have similar conserved domains. Hence, CNR might also participate in heavy metal transport. We isolated and analyzed TaCNR5 from wheat (Triticum aestivum). The expression level of TaCNR5 in the shoots of wheat increased under cadmium (Cd), zinc (Zn), or manganese (Mn) treatments. Transgenic plants expressing TaCNR5 showed enhanced tolerance to Zn and Mn. Overexpression of TaCNR5 in Arabidopsis increased Cd, Zn, and Mn translocation from roots to shoots. The concentrations of Zn and Mn in rice grains were increased in transgenic plants expressing TaCNR5. These roles of TaCNR5 in the translocation and distribution of heavy metals mean that it has potential as a genetic biofortification tool to fortify cereal grains with micronutrients.
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Affiliation(s)
- Kun Qiao
- College of Life Science , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
- Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography , Shenzhen University , Shenzhen , Guangdong 518060 , People's Republic of China
| | - Fanhong Wang
- College of Life Science , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Shuang Liang
- College of Life Science , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Hong Wang
- College of Life Science , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Zhangli Hu
- Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography , Shenzhen University , Shenzhen , Guangdong 518060 , People's Republic of China
| | - Tuanyao Chai
- College of Life Science , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
- Southeast Asia Biodiversity Research Institute , Chinese Academy of Science , Yezin , Nay Pyi Taw 05282 , Myanmar
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21
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Qiao K, Liang S, Wang F, Wang H, Hu Z, Chai T. Effects of cadmium toxicity on diploid wheat (Triticum urartu) and the molecular mechanism of the cadmium response. J Hazard Mater 2019; 374:1-10. [PMID: 30974226 DOI: 10.1016/j.jhazmat.2019.04.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 04/01/2019] [Accepted: 04/02/2019] [Indexed: 05/12/2023]
Abstract
Cadmium (Cd) is a widespread soil contaminant that readily accumulates in wheat, and posing a potential threat to human health. Our aim is to investigate Cd toxicity effect and molecular mechanisms for wheat. In this study, the physiological indexes, morphology, and gene expression patterns of diploid wheat (Triticum urartu) seedlings were evaluated after 2 and 5 d of a Cd treatment (10 μM CdSO4). The Cd treatment resulted in increased proline and glutathione contents in shoots and roots, slight damage to leaf tips, severe damage to root tips, and increased root secretions. Transcriptome analysis showed that there were significantly more differentially expressed genes (DEGs) in shoots and roots after 5 d of Cd stress than after 2 d of Cd stress, and the DEGs of the shoots were more different than the roots. A Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis indicated that the pathways enriched under Cd treatment were "DNA replication" and "phenylpropanoid biosynthesis". These findings provide information about the responses to Cd stress in wheat, and provide a theoretical basis for reducing Cd toxicity and protecting food safety.
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Affiliation(s)
- Kun Qiao
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China; Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
| | - Shuang Liang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Fanhong Wang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Hong Wang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Zhangli Hu
- Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China.
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China; Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China; The Innovative Academy of Seed Design (INASEED), Chinese Academy of Sciences, Beijing, China.
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22
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Qiao K, Wang F, Liang S, Hu Z, Chai T. Heterologous expression of TuCAX1a and TuCAX1b enhances Ca 2+ and Zn 2+ translocation in Arabidopsis. Plant Cell Rep 2019; 38:597-607. [PMID: 30725161 DOI: 10.1007/s00299-019-02390-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 01/28/2019] [Indexed: 06/09/2023]
Abstract
TuCAX1a and TuCAX1b improved Ca2+ and Zn2+ translocation and TuCAX1b enhanced Ca2+, Zn2+, Mn2+ and Fe2+ content when exposed to Cd2+; Cd2+ translocation was inhibited under Ca2+ and Zn2+. Cation/H+ antiporters (CAXs) are involved in the translocation of Ca2+ and various metal ions in higher plants. In the present study, TuCAX1a and TuCAX1b, two cation/H+ antiporters, were isolated from the diploid wheat Triticum urartu, and their metal cation translocation functions investigated. TuCAX1a and TuCAX1b showed abundant tissue-specific expression in the internode and beard, respectively, and their expression levels were increased in shoots exposed to Cd2+, Zn2+ and Ca2+. Plant phenotype analysis showed that overexpression of TuCAX1a and TuCAX1b could improve the tolerance of Arabidopsis to exogenous Ca2+ and Zn2+. In the plant shoots and roots, the contents of Ca2+ and Zn2+ were higher than wild-type plants under Ca2+ and Zn2+ treatments, indicating that TuCAX1a and TuCAX1b can enhance Ca2+ and Zn2+ translocation. Ca2+, Zn2+, Mn2+ and Fe2+ contents showed higher accumulation in TuCAX1b-transgenic Arabidopsis shoots than in wild-type plants exposed to Cd2+, and the translocation of Cd2+ was inhibited under Ca2+ and Zn2+. Overall, the present study provides a novel genetic resource for improving the uptake of microelements and reducing accumulation of toxic heavy metals in wheat.
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Affiliation(s)
- Kun Qiao
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Fanhong Wang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Shuang Liang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Zhangli Hu
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China.
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
- The Innovative Academy of Seed Design (INASEED), Chinese Academy of Sciences, Beijing, China.
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Wu Z, Wang X, Chen M, Hu H, Cao J, Chai T, Wang H. A Study on Tissue-Specific Metabolite Variations in Polygonum cuspidatum by High-Resolution Mass Spectrometry-Based Metabolic Profiling. Molecules 2019; 24:E1058. [PMID: 30889850 PMCID: PMC6471859 DOI: 10.3390/molecules24061058] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 03/13/2019] [Accepted: 03/14/2019] [Indexed: 12/17/2022] Open
Abstract
Polygonum cuspidatum Sieb. et Zucc. is a traditional Chinese herbal medicine widely used to treat tussis, hepatitis and arthralgia. This study identified and quantitatively described the bioactive compounds in different P. cuspidatum tissues. Metabolic profiles of root, stem, leaf, flower, rhizome and seed were determined using high-resolution mass spectrometry in combination with multivariate analyses. In total, 53 metabolites, 8 reported for the first time in this species, were putatively identified and classified mainly as stilbenes, anthraquinones and flavonoids. A principal component analysis, cluster analysis and heatmap were used to depict the correlations between specimens and the relative abundance levels of these compounds in different plant tissues. An orthogonal partial least square discriminant analysis found that 13 metabolites showed distinct differences among the six plant tissues, making them potential discriminative tissue-identification markers. This study will provide guidance in comparing, selecting and exploiting the medicinal uses of different P. cuspidatum tissues.
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Affiliation(s)
- Zhijun Wu
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
- School of Life sciences and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
| | - Xiaowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
| | - Mo Chen
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
| | - Hongyan Hu
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
| | - Jie Cao
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beichen west Road, Beijing 100101, China.
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Yuquan Road, Beijing 100049, China.
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Wang J, Liang S, Xiang W, Dai H, Duan Y, Kang F, Chai T. A repeat region from the Brassica juncea HMA4 gene BjHMA4R is specifically involved in Cd 2+ binding in the cytosol under low heavy metal concentrations. BMC Plant Biol 2019; 19:89. [PMID: 30819104 PMCID: PMC6394093 DOI: 10.1186/s12870-019-1674-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 02/07/2019] [Indexed: 05/31/2023]
Abstract
BACKGROUND HMA4 transporters are involved in the transport and binding of divalent heavy metals (Cd, Zn, Pb [lead] and Co [cobalt]). In general, as efflux pumps, HMA4 transporters can increase the heavy metal tolerance of yeast and Escherichia coli. Additional research has shown that the C-terminus of HMA4 contains a heavy metal-binding domain and that heterologous expression of a portion of peptides from this C-terminal domain in yeast provides a high level of Cd tolerance and Cd hyperaccumulation. RESULTS We cloned BjHMA4 from Brassica juncea, and quantitative real-time PCR analysis revealed that BjHMA4 was upregulated by Zn and Cd in the roots, stems and leaves. Overexpression of BjHMA4 dramatically affects Zn/Cd distribution in rice and wheat seedlings. Interestingly, BjHMA4 contains a repeat region named BjHMA4R within the C-terminal region; this repeat region is not far from the last transmembrane domain. We further characterized the detailed function of BjHMA4R via yeast and E. coli experiments. Notably, BjHMA4R greatly and specifically improved Cd tolerance, and BjHMA4R transformants both grew on solid media that contained 500 μM CdCl2 and presented improved Cd accumulation (approximately twice that of wild-type [WT] strains). Additionally, visualization via fluorescence microscopy indicated that BjHMA4R clearly localizes in the cytosol of yeast. Overall, these findings suggest that BjHMA4R specifically improves Cd tolerance and Cd accumulation in yeast by specifically binding Cd2+ in the cytosol under low heavy metal concentrations. Moreover, similar results in E. coli experiments corroborate this postulation. CONCLUSION BjHMA4R can specifically bind Cd2+ in the cytosol, thereby substantially and specifically improving Cd tolerance and accumulation under low heavy metal concentrations.
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Affiliation(s)
- Jianwu Wang
- Shaanxi Key Laboratory of Ecological Restoration in Shanbei Mining Area, Yulin University, Yulin, 719000 Shaanxi China
| | - Shuang Liang
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Weiwei Xiang
- Shaanxi Key Laboratory of Ecological Restoration in Shanbei Mining Area, Yulin University, Yulin, 719000 Shaanxi China
| | - Huiping Dai
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi 723001 People’s Republic of China
| | - Yizhong Duan
- Shaanxi Key Laboratory of Ecological Restoration in Shanbei Mining Area, Yulin University, Yulin, 719000 Shaanxi China
| | - Furen Kang
- Shaanxi Key Laboratory of Ecological Restoration in Shanbei Mining Area, Yulin University, Yulin, 719000 Shaanxi China
| | - Tuanyao Chai
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
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25
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Qiao K, Wang F, Liang S, Wang H, Hu Z, Chai T. Improved Cd, Zn and Mn tolerance and reduced Cd accumulation in grains with wheat-based cell number regulator TaCNR2. Sci Rep 2019; 9:870. [PMID: 30696904 PMCID: PMC6351596 DOI: 10.1038/s41598-018-37352-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 11/07/2018] [Indexed: 02/01/2023] Open
Abstract
Soil microelement deficiency and heavy metal contamination affects plant growth and development, but improving trace element uptake and reducing heavy metal accumulation by genetic breeding can help alleviate this. Cell number regulator 2 (TaCNR2) from common wheat (Triticum aestivum) are similar to plant cadmium resistance proteins, involved with regulating heavy metal translocation. Our aim was to understand the effect of TaCNR2 on heavy metal tolerance and translocation. In this study, real-time quantitative PCR indicated TaCNR2 expression in the wheat seedlings increased under Cd, Zn and Mn treatment. Overexpression of TaCNR2 in Arabidopsis and rice enhanced its stress tolerance to Cd, Zn and Mn, and overexpression in rice improved Cd, Zn and Mn translocation from roots to shoots. The grain husks in overexpressed rice had higher Cd, Zn and Mn concentrations, but the brown rice accumulated less Cd but higher Mn than wild rice. The results showed that TaCNR2 can transport heavy metal ions. Thus, this study provides a novel gene resource for increasing nutrition uptake and reducing toxic metal accumulation in crops.
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Affiliation(s)
- Kun Qiao
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
| | - Fanhong Wang
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Shuang Liang
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Hong Wang
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Zhangli Hu
- Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China.
| | - Tuanyao Chai
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China. .,Southeast Asia Biodiversity Research Institute, Chinese Academy of Science, Yezin, Nay Pyi Taw, 05282, Myanmar. .,The Innovative Academy of Seed Design (INASEED), Chinese Academy of Sciences, Beijing, China.
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26
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Qiao K, Tian Y, Hu Z, Chai T. Wheat Cell Number Regulator CNR10 Enhances the Tolerance, Translocation, and Accumulation of Heavy Metals in Plants. Environ Sci Technol 2019; 53:860-867. [PMID: 30532961 DOI: 10.1021/acs.est.8b04021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Heavy metal contamination affects crop growth and development and can indirectly threaten human health. Therefore, improving the content of microelements and reducing the accumulation of toxic metals by genetic breeding in crops is an effective strategy to solve this environmental problem. Previous reports show plant cadmium resistance (PCR) protein can transport zinc (Zn) and cadmium (Cd). The cell number regulator (CNR) protein, which functions to regulate organ size, has high similarity to, and shares conserved motifs with, PCR. Therefore, CNR may be involved in regulating heavy metal translocation. We isolated TuCNR10 from diploid wheat, Triticum urartu. Real-time quantitative PCR showed TuCNR10 expression increased in the shoots and roots of seedlings under Cd, Zn, and manganese (Mn) stresses. Confocal imaging indicated TuCNR10 was localized at the plasma membrane. Overexpression of TuCNR10 in Arabidopsis and rice enhanced Cd, Zn, and Mn tolerance and improved Cd, Zn, and Mn translocation from roots to shoots. Compared with wild-type rice, rice overexpressing TuCNR10 had lower Cd and higher Zn and Mn contents in grains. These results indicated that TuCNR10 may be a transporter of Cd, Zn, and Mn. TuCNR10 may be a useful genetic resource for microelement fortification and reducing toxic metal accumulation in crops.
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Affiliation(s)
- Kun Qiao
- Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography , Shenzhen University , Shenzhen , China
- College of Life Science , University of Chinese Academy of Sciences , Beijing , China
| | - Yanbao Tian
- Institute of Genetics and Developmental Biology , Chinese Academy of Sciences , Beijing , China
| | - Zhangli Hu
- Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography , Shenzhen University , Shenzhen , China
| | - Tuanyao Chai
- College of Life Science , University of Chinese Academy of Sciences , Beijing , China
- Institute of Genetics and Developmental Biology , Chinese Academy of Sciences , Beijing , China
- Southeast Asia Biodiversity Research Institute , Chinese Academy of Science , Yezin, Nay Pyi Taw 05282 , Myanmar
- The Innovative Academy of Seed Design (INASEED) , Chinese Academy of Sciences , Beijing , China
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27
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Zhao H, Wei Y, Wang J, Chai T. Isolation and expression analysis of cadmium-induced genes from Cd/Mn hyperaccumulator Phytolacca americana in response to high Cd exposure. Plant Biol (Stuttg) 2019; 21:15-24. [PMID: 30183121 DOI: 10.1111/plb.12908] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 09/02/2018] [Indexed: 06/08/2023]
Abstract
Phytolacca americana is recognised as a hyperaccumulator that accumulates cadmium (Cd) and manganese (Mn). Although most studies have provided abundant physiological evidence, little is known about the molecular mechanisms of Cd accumulation in P. americana. In this study, Cd-induced genes were isolated using suppression subtractive hybridisation (SSH) library construction, and gene expression patterns under Cd stress were quantified using real-time quantitative PCR. The functions of PaGST, PaMT and PaFe-SOD were confirmed in transformant yeast. Reactive oxygen species (ROS) formation and cell death in root tips were detected, and SOD and POD activities in leaf tissue were also analysed. There were about 447 expressed sequence tags (ESTs) identified and confirmed. GO analysis showed those genes were mainly involved in metabolism, cell stress and defence, transcription and translation, signal transduction, transport, energy and ion transport, which formed the basis for a molecular understanding of P. americana Cd tolerance mechanisms. Cd also stimulated ROS formation and modified the antioxidant systems. Taken together, our results indicate that ROS formation and Cd-induced gene expression favour P. americana tolerance by activating the defence system and permitting subsequent adaptation to Cd toxicity.
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Affiliation(s)
- H Zhao
- College of Life Science & Engineering, North Minzu University, Yinchuan, Ningxia, China
| | - Y Wei
- College of Life Science & Engineering, North Minzu University, Yinchuan, Ningxia, China
| | - J Wang
- College of Life Science & Engineering, North Minzu University, Yinchuan, Ningxia, China
| | - T Chai
- Department of Life Science, University of the Chinese Academy of Sciences, Beijing, China
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28
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Zhang Y, Zhang Y, Xiong J, Zhao Z, Chai T. The enhancement of pyridine degradation byRhodococcusKDPy1 in coking wastewater. FEMS Microbiol Lett 2018; 366:5184456. [DOI: 10.1093/femsle/fny271] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 11/13/2018] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yuxiu Zhang
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), D11 Xueyuan Road, Beijing 100083, China
| | - Yiming Zhang
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), D11 Xueyuan Road, Beijing 100083, China
| | - Jie Xiong
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), D11 Xueyuan Road, Beijing 100083, China
| | - Zhehui Zhao
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), D11 Xueyuan Road, Beijing 100083, China
| | - Tuanyao Chai
- College of Life Science, University of Chinese Academy of Sciences, A19 Yuquan Road, Beijing 100049, China
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29
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Xu R, Yu H, Wang J, Duan P, Zhang B, Li J, Li Y, Xu J, Lyu J, Li N, Chai T, Li Y. A mitogen-activated protein kinase phosphatase influences grain size and weight in rice. Plant J 2018; 95:937-946. [PMID: 29775492 DOI: 10.1111/tpj.13971] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/08/2018] [Accepted: 05/09/2018] [Indexed: 05/05/2023]
Abstract
Grain size and weight are directly associated with grain yield in crops. However, the molecular mechanisms that set final grain size and weight remain largely unknown. Here, we characterize two large grain mutants, large grain8-1 (large8-1) and large grain8-2 (large8-2). LARGE8 encodes the mitogen-activated protein kinase phosphatase1 (OsMKP1). Loss of function mutations in OsMKP1 results in large grains, while overexpression of OsMKP1 leads to small grains. OsMKP1 determines grain size by restricting cell proliferation in grain hulls. OsMKP1 directly interacts with and deactivates the mitogen-activated protein kinase 6 (OsMAPK6). Taken together, we identify OsMKP1 as a crucial factor that influences grain size by deactivating OsMAPK6, indicating that the reversible phosphorylation of OsMAPK6 plays important roles in determining grain size in rice.
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Affiliation(s)
- Ran Xu
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Haiyue Yu
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Junmin Wang
- Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Penggen Duan
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Baolan Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jing Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Yu Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Jinsong Xu
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jia Lyu
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Na Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Tuanyao Chai
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Yunhai Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
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30
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Qiao K, Gong L, Tian Y, Wang H, Chai T. The metal-binding domain of wheat heavy metal ATPase 2 (TaHMA2) is involved in zinc/cadmium tolerance and translocation in Arabidopsis. Plant Cell Rep 2018; 37:1343-1352. [PMID: 29936635 DOI: 10.1007/s00299-018-2316-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Cysteine in the N-terminal metal-binding domain (N-MBD) of TaHMA2 participates in Zn2+/Cd2+ binding and translocation in Arabidopsis. Wheat heavy metal ATPase 2 (TaHMA2) can transport Zn2+ and Cd2+ across membranes. A previous study showed that cysteine (Cys) and glutamate residues in the N-terminal metal-binding domain (N-MBD) were necessary for metal-binding and translocation of TaHMA2 in yeast. However, the function of TaHMA2 in plants was not fully revealed. In this study, we investigated the roles of the CCxxE and CPC motifs in the N-MBD and the N/C-terminal regions of TaHMA2 in Zn2+/Cd2+ translocation in root and shoot of Arabidopsis. Compared with the wild type, overexpression of TaHMA2 and the TaHMA2 derivative (glutamic substituted for alanine from CCxxE) in Arabidopsis increased root length, fresh weight and enhanced Zn2+/Cd2+ root-to-shoot translocation. The plants with a truncated N/C-terminal of TaHMA2 were impaired in Zn2+/Cd2+ tolerance and translocation, while mutagenesis of Cys in the N-MBD reduced the tolerance and transport activity of TaHMA2, suggesting the involvement of Cys in Zn2+/Cd2+ binding and translocation in Arabidopsis. This study therefore provides a theoretical possibility for the application of TaHMA2 in transgenic breeding to regulate metal element balance in crop plants.
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Affiliation(s)
- Kun Qiao
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
| | - Liang Gong
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
| | - Yanbao Tian
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Hong Wang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China.
| | - Tuanyao Chai
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
- The Innovative Academy of Seed Design (INASEED), Chinese Academy of Sciences, Beijing, China.
- Southeast Asia Biodiversity Research Institute, Chinese Academy of Science, Yezin, Nay Pyi Taw, 05282, Myanmar.
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Yang W, Guo M, Liu G, Yu G, Wang P, Wang H, Chai T. Detection and analysis of fine particulate matter and microbial aerosol in chicken houses in Shandong Province, China. Poult Sci 2018; 97:995-1005. [PMID: 29294119 DOI: 10.3382/ps/pex388] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 11/19/2017] [Indexed: 11/20/2022] Open
Abstract
Bacteria and fungi are primary constituents of airborne microbes in fine particulate matter and harmful to health. To evaluate the environmental quality of different poultry houses in Shandong Province, China, the airborne aerobic bacteria, airborne fungi, and airborne Escherichia coli were collected by the Andersen-6 air microorganism sampler. The fine particulate matter was collected by a ZR-3920 ambient air particulate matter sampler, and bacterial and fungal diversities and relative abundances analyzed using high-throughput sequencing. Results showed that the concentrations of airborne aerobic bacteria, airborne fungi, and airborne Escherichia coli in poultry houses were 0.167 to 4.484 × 104 CFU/m3, 0.236 to 4.735 × 103 CFU/m3, and 0 to 33.0 CFU/m3, respectively. 11.4 to 34.3% of aerobic bacteria and 16.8 to 37.5% of fungi were distributed at levels 5 and 6 (0.6 to 2.1 μm, the particle sizes similar to fine particulate matter) in the Andersen sampler. The concentration of fine particulate matter in the poultry houses was 114 to 230 μg/m3, which was higher than the safety value 10 specified by WHO. In fine particulate matter, the main bacteria at phylum level were Firmicutes, Bacteroidetes, and Proteobacteria, whereas the dominant phylum of fungus was Ascomycota and Basidiomycota. Importantly, the relative abundances of Escherichia and Corynebacterium in the broiler houses were greater than those in layer houses. However, the percentages of Aspergillus and Penicillium were 13.5 and 0.56%, with a relatively high level in the layer houses. Altogether, results revealed that the ambient air quality in the poultry houses sampled had a relatively high abundance of conditional pathogenic bacteria and concentration of fine particulate matter, which could threaten the health of animals and workers in those environments.
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Affiliation(s)
- W Yang
- College of Veterinary Medicine, Shandong Agricultural University, Sino-German Cooperative Research Center for Zoonosis of Animal Origin of Shandong Province, 61 Daizong Road, Tai'an City, Shandong Province, China, 271018.,Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Taishan Medical University, Tai'an City, PR China, 270016.,Shandong Lukang Shelile Pharmaceutical Co., LTD, 6 East Outer Ring Road, Ji'ning City, Shandong Province, China, 272073
| | - M Guo
- College of Veterinary Medicine, Shandong Agricultural University, Sino-German Cooperative Research Center for Zoonosis of Animal Origin of Shandong Province, 61 Daizong Road, Tai'an City, Shandong Province, China, 271018.,Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Taishan Medical University, Tai'an City, PR China, 270016
| | - G Liu
- Shandong Lukang Shelile Pharmaceutical Co., LTD, 6 East Outer Ring Road, Ji'ning City, Shandong Province, China, 272073
| | - G Yu
- Shandong Lukang Shelile Pharmaceutical Co., LTD, 6 East Outer Ring Road, Ji'ning City, Shandong Province, China, 272073
| | - P Wang
- Shandong Lukang Shelile Pharmaceutical Co., LTD, 6 East Outer Ring Road, Ji'ning City, Shandong Province, China, 272073
| | - H Wang
- College of Veterinary Medicine, Shandong Agricultural University, Sino-German Cooperative Research Center for Zoonosis of Animal Origin of Shandong Province, 61 Daizong Road, Tai'an City, Shandong Province, China, 271018
| | - T Chai
- College of Veterinary Medicine, Shandong Agricultural University, Sino-German Cooperative Research Center for Zoonosis of Animal Origin of Shandong Province, 61 Daizong Road, Tai'an City, Shandong Province, China, 271018
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Bao W, Wang X, Chen M, Chai T, Wang H. A WRKY transcription factor, PcWRKY33, from Polygonum cuspidatum reduces salt tolerance in transgenic Arabidopsis thaliana. Plant Cell Rep 2018; 37:1033-1048. [PMID: 29691637 DOI: 10.1007/s00299-018-2289-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/19/2018] [Indexed: 05/17/2023]
Abstract
PcWRKY33 is a transcription factor which can reduce salt tolerance by decreasing the expression of stress-related genes and increasing the cellular levels of reactive oxygen species (ROS). WRKY transcription factors play important roles in the regulation of biotic and abiotic stresses. Here, we report a group I WRKY gene from Polygonum cuspidatum, PcWRKY33, that encodes a nucleoprotein, which specifically binds to the W-box in the promoter of target genes to regulate their expression. The results from qPCR and promoter analysis show that expression of PcWRKY33 can be induced by various abiotic stresses, including NaCl and plant hormones. Overexpression of PcWRKY33 in Arabidopsis thaliana reduced tolerance to salt stress. More specifically, several physiological parameters (such as root length, seed germination rate, seedling survival rate, and chlorophyll concentration) of the transgenic lines were significantly lower than those of the wild type under salt stress. In addition, following exposure to salt stress, transgenic plants showed decreased expression of stress-related genes, a weakened ability to maintain Na+/K+ homeostasis, decreased activities of reactive oxygen species- (ROS-) scavenging enzymes, and increased accumulation of ROS. Taken together, these results suggest that PcWRKY33 negatively regulates the salt tolerance in at least two ways: by down-regulating the induction of stress-related genes and by increasing the level of cellular ROS. In sum, our results indicate that PcWRKY33 is a group I WRKY transcription factor involved in abiotic stress regulation.
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Affiliation(s)
- Wenqi Bao
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Xiaowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Mo Chen
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China.
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Xu R, Duan P, Yu H, Zhou Z, Zhang B, Wang R, Li J, Zhang G, Zhuang S, Lyu J, Li N, Chai T, Tian Z, Yao S, Li Y. Control of Grain Size and Weight by the OsMKKK10-OsMKK4-OsMAPK6 Signaling Pathway in Rice. Mol Plant 2018; 11:860-873. [PMID: 29702261 DOI: 10.1016/j.molp.2018.04.004] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/17/2018] [Accepted: 04/19/2018] [Indexed: 05/21/2023]
Abstract
Grain size is one of the key agronomic traits that determine grain yield in crops. However, the mechanisms underlying grain size control in crops remain elusive. Here we demonstrate that the OsMKKK10-OsMKK4-OsMAPK6 signaling pathway positively regulates grain size and weight in rice. In rice, loss of OsMKKK10 function results in small and light grains, short panicles, and semi-dwarf plants, while overexpression of constitutively active OsMKKK10 (CA-OsMKKK10) results in large and heavy grains, long panicles, and tall plants. OsMKKK10 interacts with and phosphorylates OsMKK4. We identified an OsMKK4 gain-of-function mutant (large11-1D) that produces large and heavy grains. OsMKK4A227T encoded by the large11-1D allele has stronger kinase activity than OsMKK4. Plants overexpressing a constitutively active form of OsMKK4 (OsMKK4-DD) also produce large grains. Further biochemical and genetic analyses revealed that OsMKKK10, OsMKK4, and OsMAPK6 function in a common pathway to control grain size. Taken together, our study establishes an important genetic and molecular framework for OsMKKK10-OsMKK4-OsMAPK6 cascade-mediated control of grain size and weight in rice.
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Affiliation(s)
- Ran Xu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Penggen Duan
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Haiyue Yu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Zhengkui Zhou
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Baolan Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ruci Wang
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jing Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Guozheng Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Shangshang Zhuang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Jia Lyu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Na Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Tuanyao Chai
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Zhixi Tian
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Shanguo Yao
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yunhai Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; CAS Centre for Excellence in Molecular Plant Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China.
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Li X, Chen M, Chai T, Wang H. [Advances in structure-function relation of plant type Ⅲ polyketide synthases by site-directed mutagenesis]. Sheng Wu Gong Cheng Xue Bao 2018; 34:473-488. [PMID: 29701022 DOI: 10.13345/j.cjb.170293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plant type Ⅲ polyketide synthases (PKSs), the pivotal enzymes in the biosynthesis of polyketides, produce backbones of many structurally diverse and functionally different polyketides. So far, a variety of functionally diverse plant type Ⅲ PKSs have been cloned and identified from plant origin. Site-directed mutagenesis is a useful technique to study the complex relationship between protein structure and function. This review summarized advances in the structure-function relation of plant type Ⅲ polyketide synthases by site-directed mutagenesis in recent years, including the modification of the amino acid residues influencing enzyme architectures (such as controlling the specificity of starter substrates, the number of condensation reactions, and the cyclization reactions of the intermediate product). This review provides information to study the structure-function relation of plant type Ⅲ polyketide synthases.
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Affiliation(s)
- Xing Li
- University of Chinese Academy of Sciences, Beijing 100049, China
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Mo Chen
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tuanyao Chai
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong Wang
- University of Chinese Academy of Sciences, Beijing 100049, China
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Lin C, Wang B, Cui X, Xu D, Cheng H, Wang Q, Ma J, Chai T, Duan X, Liu X, Ma J, Zhang X, Liu Y. Estimates of Soil Ingestion in a Population of Chinese Children. Environ Health Perspect 2017; 125:077002. [PMID: 28728141 PMCID: PMC5744705 DOI: 10.1289/ehp930] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 01/05/2017] [Accepted: 01/23/2017] [Indexed: 05/03/2023]
Abstract
BACKGROUND China's soil pollution poses serious health risks. However, data regarding the soil ingestion rate (SIR) of the Chinese population, which is critical to assessing associated health risks, are lacking. OBJECTIVES We estimated soil ingestion of 177 Chinese children from Guangdong, Hubei, and Gansu Provinces. METHODS We conducted this investigation by employing a tracer mass-balance method. We collected a duplicate of all food consumed and all feces and urine excreted on 1 d (n=153) and over 3 consecutive d (n=24), as well as soil samples from play areas and drinking-water samples. We analyzed concentrations of the tracer elements Al, Ba, Ce, Mn, Sc, Ti, V, and Y in these samples using ICP-AES and ICP-MS and estimated the SIR for each subject. RESULTS The estimated SIR data based on each tracer element were characterized by a skewed distribution, as well as higher inter-tracer and inter-subject variation, with several outliers. After removing the outliers, daily SIR median (range) values in milligrams per day were Al, 27.8 (−42.0 to 257.3); Ba, 36.5 (−230.3 to 412.7); Ce, 35.3 (−21.2 to 225.8); Mn, 146.6 (−1259.4 to 1827.7); Sc, 54.8 (−4.5 to 292.0); Ti, 36.7 (−233.7 to 687.0); V, 92.1 (10.4 to 308.0); and Y, 59.1 (−18.4 to 283.0). Daily SIR median/95th percentile (range) values based on the best tracer method (BTM) were 51.7/216.6 (−9.5 to 297.6) mg/d. CONCLUSIONS Based on the BTM, recommended SIR values for the general population of Chinese children (2.5 to 12 years old) are 52 mg/d for the central tendency and 217 mg/d for the upper percentile. We did not differentiate between outside soil and indoor dust. Considering the lower concentration of tracer elements in indoor dust than outside soil, actual soil and dust ingestion rates could be higher. https://doi.org/10.1289/EHP930.
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Affiliation(s)
- Chunye Lin
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
| | - Beibei Wang
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
| | - Xiaoyong Cui
- University of Chinese Academy of Sciences , Beijing, China
| | - Dongqun Xu
- Institute of Environmental Health and Related Product Safety, Chinese Center for Disease and Prevention , Beijing, China
| | - Hongguang Cheng
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
| | - Qin Wang
- Institute of Environmental Health and Related Product Safety, Chinese Center for Disease and Prevention , Beijing, China
| | - Jin Ma
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences , Beijing, China
| | - Tuanyao Chai
- University of Chinese Academy of Sciences , Beijing, China
| | - Xiaoli Duan
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences , Beijing, China
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China
| | - Xitao Liu
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
| | - Junwei Ma
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
| | - Xuan Zhang
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
| | - Yanzhong Liu
- State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University , Beijing, China
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Feng S, Tan J, Zhang Y, Liang S, Xiang S, Wang H, Chai T. Isolation and characterization of a novel cadmium-regulated Yellow Stripe-Like transporter (SnYSL3) in Solanum nigrum. Plant Cell Rep 2017; 36:281-296. [PMID: 27866260 DOI: 10.1007/s00299-016-2079-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/10/2016] [Indexed: 05/25/2023]
Abstract
SnYSL3 encodes a plasma-localized transporter delivering various metal-nicotianamine complexes. The expression of SnYSL3 is up-regulated by excess Cd, suggesting an important role for SnYSL3 in response to Cd stress. The Yellow Stripe-Like (YSL) transporters have been proposed to participate in metal uptake and long-range transport in model plants. In this study, we isolated and characterized a novel member of the YSL gene family, SnYSL3, from the cadmium hyperaccumulator Solanum nigrum. SnYSL3 was constitutively expressed and encodes a plasma membrane-localized protein. In situ RNA hybridization localized the SnYSL3 transcripts predominantly in vascular tissues and epidermal cells of the roots and stems, while in leaves, the mRNA levels were high in the vasculature. The SnYSL3 expression level was up-regulated by excess Cd, excess Fe and Cu deficiency. Heterologous expression of SnYSL3 in yeast revealed that SnYSL3 transports nicotianamine complexes containing Fe(II), Cu, Zn and Cd. SnYSL3 overexpression in Arabidopsis thaliana decreased Fe and Mn concentrations in the roots and increased the root-to-shoot translocation ratios of Fe and Mn. Under Cd exposure, the transgenic plants showed increased translocation ratios of Fe and Cd, but no difference was observed in Mn translocation from roots to shoots between the transgenic and wild-type lines. Although the accurate function of SnYSL3 remains to be confirmed, these results suggest that SnYSL3 is a transporter delivering a broad range of metal-nicotianamine complexes and is potentially important for the response to heavy metal stress, especially due to Cd and Fe.
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Affiliation(s)
- Shanshan Feng
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Jinjuan Tan
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yuxiu Zhang
- Department of Biological Engineering, School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, China
| | - Shuang Liang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Shuqin Xiang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China.
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
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Zhang P, Jia R, Zhang Y, Shi P, Chai T. Quinoline-degrading strain Pseudomonas aeruginosa KDQ4 isolated from coking activated sludge is capable of the simultaneous removal of phenol in a dual substrate system. J Environ Sci Health A Tox Hazard Subst Environ Eng 2016; 51:1139-1148. [PMID: 27458688 DOI: 10.1080/10934529.2016.1206377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Quinoline is a refractory organic compound in the treatment of coking wastewater. The isolation of high efficiency quinoline-degrading bacteria from activated sludge and the evaluation of their degradation characteristics in the presence of phenol or in the actual coking wastewater are important for the improvement of effluent quality. The novel bacterial strain Pseudomonas aeruginosa KDQ4 was isolated from a quinoline enrichment culture obtained from the activated sludge of a coking wastewater treatment plant. The optimum temperature and initial pH for quinoline degradation were 33-38°C and 8-9, respectively. KDQ4 completely degraded 400 mg/L of quinoline within 24 h and 800 mg/L of phenol within 30 h. In the dual-substrate system, the removal efficiencies of quinoline and phenol at the same initial concentration (200 mg/L) by KDQ4 were 89% and 100% within 24 h, respectively, indicating that KDQ4 could simultaneously and quickly degrade quinoline and phenol in a coexistence system. Moreover, KDQ4 was able to adapt to actual coking wastewater containing high quinoline and phenol concentrations and rapidly remove them. KDQ4 also exhibited heterotrophic nitrification and aerobic denitrification potential under aerobic conditions. These results suggested a potential bioaugmentation role for KDQ4 in the removal of nitrogen-heterocyclic compounds and phenolics from coking wastewater.
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Affiliation(s)
- Panhong Zhang
- a State Key Laboratory of Environmental Chemistry and Ecotoxicity , Research center for Eco-Environment of Sciences, Chinese Academy of Sciences , Beijing , PR China
- b Sino-Danish Center for Education and Research , Chinese Academy of Sciences , Beijing , PR China
| | - Rong Jia
- c Department of Environmental & Biological Engineering , School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing) , Beijing , PR China
| | - Yuxiu Zhang
- c Department of Environmental & Biological Engineering , School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing) , Beijing , PR China
| | - Peili Shi
- c Department of Environmental & Biological Engineering , School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing) , Beijing , PR China
| | - Tuanyao Chai
- d College of Life Science , University of Chinese Academy of Sciences , Beijing , PR China
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Shen Y, Li X, Chai T, Wang H. Outer-sphere residues influence the catalytic activity of a chalcone synthase from Polygonum cuspidatum. FEBS Open Bio 2016; 6:610-8. [PMID: 27419064 PMCID: PMC4887977 DOI: 10.1002/2211-5463.12072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 04/18/2016] [Accepted: 04/19/2016] [Indexed: 11/27/2022] Open
Abstract
We have previously cloned a chalcone synthase (PcCHS1) from Polygonum cuspidatum and biochemically identified its enzymatic dynamic properties. Here, we found that the outer sphere residues, Q82 and R105, could affect the catalytic activity and product profile of PcCHS1. Both Q82P and R105Q mutations of PcCHS1 could also change the pH dependence activity as well as the product profile of PcCHS1. Moreover, the Q82P/C198F double mutant could rescue the complete loss of enzyme activity caused by the C198F single mutation. Our study demonstrated that these outer‐sphere residues of PcCHS1 play important roles both in structural maintenance and enzyme activity.
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Affiliation(s)
- Yalin Shen
- University of Chinese Academy of Sciences Beijing China
| | - Xing Li
- University of Chinese Academy of Sciences Beijing China; State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China
| | - Tuanyao Chai
- University of Chinese Academy of Sciences Beijing China
| | - Hong Wang
- University of Chinese Academy of Sciences Beijing China
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Xiang S, Feng S, Zhang Y, Tan J, Liang S, Chai T. The N-terminal degenerated metal-binding domain is involved in the heavy metal transport activity of TaHMA2. Plant Cell Rep 2015; 34:1615-1628. [PMID: 26037615 DOI: 10.1007/s00299-015-1813-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Revised: 04/23/2015] [Accepted: 05/20/2015] [Indexed: 06/04/2023]
Abstract
We identified key residues of TaHMA2, and the N- and C-terminal regions of the protein have different roles in its transport function when heterologously expressed in yeast. TaHMA2, a P1B-type ATPase from wheat (Triticum aestivum L.), plays an important role in heavy metal homeostasis in plants. A previous study showed that overexpressing TaHMA2 in rice (Oryza sativa L.), Arabidopsis thaliana, or tobacco (Nicotiana tabacum L.) resulted in various responses to heavy metals. Here, we report the heterologous expression of TaHMA2 in the yeast Saccharomyces cerevisiae. TaHMA2 expression increased the yeast's sensitivity to Cd, but not to Zn, Pb or Co, and increased Cd accumulation was concurrently observed. The eGFP-TaHMA2 fusion protein was localized to the plasma membrane and showed a discontinuous pattern. Mutagenesis of the cysteine and glutamate residues in the N-terminal metal-binding domain (N-MBD) impaired the function of TaHMA2. Deletion of most of the C terminus (TaHMA2ΔC, 712-1003) partially abolished the protein's function, whereas deletion of the N terminus (TaHMA2ΔN, 2-699) completely abolished Cd sensitivity. These data suggest that cysteine and glutamate residues are important for the metal-binding/translocation function of TaHMA2. Additional studies are needed to further understand the selectivity of TaHMA2 in planta.
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Affiliation(s)
- Shuqin Xiang
- College of Life Science, University of the Chinese Academy of Sciences, Beijing, China
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Chai T, Mohan M, Ong H, Wong F. Antioxidant, Iron-chelating and Anti-glucosidase Activities of Typha domingensis Pers (Typhaceae). TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i1.10] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Liu H, Zhang Y, Chai T, Tan J, Wang J, Feng S, Liu G. Manganese-mitigation of cadmium toxicity to seedling growth of Phytolacca acinosa Roxb. is controlled by the manganese/cadmium molar ratio under hydroponic conditions. Plant Physiol Biochem 2013; 73:144-153. [PMID: 24095921 DOI: 10.1016/j.plaphy.2013.09.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 09/03/2013] [Indexed: 06/02/2023]
Abstract
Manganese (Mn) can interact with cadmium (Cd) in environments and influence the toxic effect of Cd on plants. However, few studies have investigated the relationship between the Mn/Cd ratio and plant Cd-toxicity along Cd concentrations. In this paper, we studied the effects of external Mn/Cd molar ratios (0, 10, 30, 50 and 60) on Cd toxicity in the Mn hyperaccumulator and Cd tolerant plant, Phytolacca acinosa Roxb., at three Cd levels (50, 100 and 200 μM) under hydroponic conditions. Our result showed that seedling growth (y) under Cd stress was strongly positively related to the solution Mn/Cd molar ratio (SMCR). The relationship between the two variables under solution Cd concentrations was well explained by the linear regression model y=a+b1 (SMCR)+b2 (Solution-Cd). Increasing SMCR significantly reduced the Cd concentration and increased the Mn concentration in plant tissues. However, seedling growth was consistent with the shoot Mn/Cd molar ratio rather than with the Mn or Cd concentrations in plant tissues. At low levels of SMCR (e.g. 0 and 10), elevation of Mn distribution in shoot tissues might be a mechanism in P. acinosa seedlings to defend against Cd-toxicity. In comparison with low levels of SMCR, high levels of SMCR (e.g. 50 and 60) greatly alleviated lipid peroxidation and plant water-loss, and enhanced photosynthesis. However, the alleviated lipid peroxidation in the Mn-mitigation of Cd toxicity was likely to be the secondary effect resulting from the antagonism between Mn and Cd in the plant.
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Affiliation(s)
- Huimin Liu
- College of Life Science, University of Chinese Academy of Sciences, Yuquan Rd 19A, Beijing 100049, China.
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43
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Zhang Y, Meng X, Chai T. [Characterization of phenol-degrading Rhodococcus sp. strain P1 from coking wastewater]. Wei Sheng Wu Xue Bao 2013; 53:1117-1124. [PMID: 24409768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVE The removal of phenolic compounds was a key problem for coking wastewater treatment. This study focused on the isolation and characterization of anefficient phenol-degrading bacterial strain from coking wastewater. METHODS Phenol-degrading bacterium was screened by using phenol as the sole carbon source, strain was identified according to the morphological properties and 16S rRNA sequence analysis, the phenol-degrading characteristics and the potential for removal of phenol in the coking wastewater were evaluated. RESULTS Strain P1 was identified as the genus Rhodococcus sp. with morphological properties and 16S rRNA gene sequence. This strain could survive at the presence of phenol with concentration up to 1400 mg/L. The optimal conditions for biodegradation of 600 mg/L phenol in mineral medium were at 32 - 42 degrees C, pH 7.0 and 0 - 4% NaCl. The phenol-degrading efficiency by P1 strain was different in response to various heavy metal ions, Ni2+, Mn2+ and low concentration of Pb2+ had no effect on the phenol degradation. However, Cu2+, Ni2+ and Cd2+ seriously inhibited phenol degradation by strain P1. The 279.9 mg/L phenols from 1/3 coking wastewater were completely degraded after incubation for 2 days. CONCLUSION Strain P1 is an efficient phenol-degrading bacterium and has of the potential for removing phenolic compounds in coking wastewater.
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Affiliation(s)
- Yuxiu Zhang
- School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China.
| | - Xiaojun Meng
- School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China
| | - Tuanyao Chai
- School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China
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Bai Y, Zhao X, Qi C, Wang L, Cheng Z, Liu M, Liu J, Yang D, Wang S, Chai T. Effects of chromium picolinate on the viability of chick embryo fibroblast. Hum Exp Toxicol 2013; 33:403-13. [DOI: 10.1177/0960327113499042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Chromium picolinate (CrPic), which is used as a nutritional supplement and to treat type 2 diabetes, has gained much attention because of its cytotoxicity. This study evaluated the effects of CrPic on the viability of the chick embryo fibroblast (CEF) using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, morphological detection, and flow cytometry. The results show that lower concentrations of CrPic (8 and 16 μM) did not damage CEF viability ( p > 0.05). However, higher CrPic concentrations (400 and 600 μM) indicated a highly significant effect on the production of intracellular reactive oxygen species, alteration of mitochondrial membrane potential, intracellular calcium ion concentration, and the apoptosis rate ( p < 0.01), contrary to lower CrPic concentrations (8 and 16 μM) and control group. Moreover, apoptotic morphological changes induced by these processes in CEF were confirmed using Hoechst 33258 staining. Cell death induced by higher concentrations of CrPic was caused by an apoptotic and a necrotic mechanism, whereas the main mechanism of oxidative stress-induced mitochondrial dysfunction was apoptotic death.
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Affiliation(s)
- Y Bai
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - X Zhao
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - C Qi
- Central Hospital of Tai’an City, Tai’an, Shandong, China
| | - L Wang
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - Z Cheng
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - M Liu
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - J Liu
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - D Yang
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - S Wang
- College of Veterinary Medicine, Research Center for Animal Disease Control Engineering Shandong Province, Shandong Agricultural University, Tai’an, China
| | - T Chai
- Sino-German Cooperative Research Centre for Zoonosis of Animal Origin of Shandong Province, Tai’an, China
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45
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Liu J, Zhang H, Zhang Y, Chai T. Silicon attenuates cadmium toxicity in Solanum nigrum L. by reducing cadmium uptake and oxidative stress. Plant Physiol Biochem 2013; 68:1-7. [PMID: 23608626 DOI: 10.1016/j.plaphy.2013.03.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 03/18/2013] [Indexed: 05/22/2023]
Abstract
Solanum nigrum L. is considered to be a potential plant for restoring Cd-contaminated soils. Si could enhance plants tolerance to heavy metal; however, the mechanism of Si-mediated alleviation of Cd toxicity in S. nigrum was not clear. Three-week-old S. nigrum seedlings were grown in Hoagland solution containing 0 or 100 μM Cd with or without 1 mM Si for 4 days. The results showed that the Cd concentration both in roots and shoots of Si-supplied plant was significantly reduced, especially in expanding and old leaves. The relative proportion of ethanol-extractable Cd, water-extractable Cd and NaCl-extractable Cd in roots was increased by adding Si, while the root-to-shoot Cd translocation was not decreased. Furthermore, in comparison with single Cd treatment, supplying Si could reduce H₂O₂ accumulation and cell death in roots, and the electrolyte leakage and H₂O₂ concentration in functional leaves. Moreover, the activity of superoxide dismutase (SOD, EC 1.15.1.1), catalase (CAT, EC 1.11.1.6), peroxidase (POD, EC 1.11.1.7) and ascorbate peroxidase (APX, EC 1.11.1.11) in functional leaves was markedly increased by Cd exposure, while the antioxidative enzyme activities in Cd plus Si treatment seedlings were significantly lower than that in Cd treatment alone, this decrease might be attributed to the reduction of Cd concentration and Cd-induced oxidative damages. These results demonstrate that Si-enhanced Cd tolerance in S. nigrum is mainly due to the decrease of Cd uptake in roots and Cd distribution in expanding and old leaves, as well as lowering oxidative stress induced by Cd in plants.
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Affiliation(s)
- Jinguang Liu
- School of Chemical and Environmental Engineering, China University of Mining & Technology-Beijing, Xueyuan Rd D11, Beijing 100083, China
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46
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Shao W, Wang Z, Ip W, Chiang YT, Xiong X, Chai T, Xu C, Wang Q, Jin T. GLP-1(28-36) improves β-cell mass and glucose disposal in streptozotocin-induced diabetic mice and activates cAMP/PKA/β-catenin signaling in β-cells in vitro. Am J Physiol Endocrinol Metab 2013; 304:E1263-72. [PMID: 23571712 DOI: 10.1152/ajpendo.00600.2012] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent studies have demonstrated that the COOH-terminal fragment of the incretin hormone glucagon-like peptide-1 (GLP-1), a nonapeptide GLP-1(28-36)amide, attenuates diabetes and hepatic steatosis in diet-induced obese mice. However, the effect of this nonapeptide in pancreatic β-cells remains largely unknown. Here, we show that in a streptozotocin-induced mouse diabetes model, GLP-1(28-36)amide improved glucose disposal and increased pancreatic β-cell mass and β-cell proliferation. An in vitro investigation revealed that GLP-1(28-36)amide stimulates β-catenin (β-cat) Ser(675) phosphorylation in both the clonal INS-1 cell line and rat primary pancreatic islet cells. In INS-1 cells, the stimulation was accompanied by increased nuclear β-cat content. GLP-1(28-36)amide was also shown to increase cellular cAMP levels, PKA enzymatic activity, and cAMP response element-binding protein (CREB) and cyclic AMP-dependent transcription factor-1 (ATF-1) phosphorylation. Furthermore, GLP-1(28-36)amide treatment enhanced islet insulin secretion and increased the growth of INS-1 cells, which was associated with increased cyclin D1 expression. Finally, PKA inhibition attenuated the effect of GLP-1(28-36)amide on β-cat Ser(675) phosphorylation and cyclin D1 expression in the INS-1 cell line. We have thus revealed the beneficial effect of GLP-1(28-36)amide in pancreatic β-cells in vitro and in vivo. Our observations suggest that GLP-1(28-36)amide may exert its effect through the PKA/β-catenin signaling pathway.
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Affiliation(s)
- Weijuan Shao
- Division of Advanced Diagnostics, Toronto General Research Institutes, University Health Network, Toronto, Ontario, Canada
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47
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Zhao D, Liao X, Yan X, Huling SG, Chai T, Tao H. Effect and mechanism of persulfate activated by different methods for PAHs removal in soil. J Hazard Mater 2013; 254-255:228-235. [PMID: 23618659 DOI: 10.1016/j.jhazmat.2013.03.056] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 03/21/2013] [Accepted: 03/24/2013] [Indexed: 06/02/2023]
Abstract
The influence of persulfate activation methods on polycyclic aromatic hydrocarbons (PAHs) degradation was investigated and included thermal, citrate chelated iron, and alkaline, and a hydrogen peroxide (H₂O₂)-persulfate binary mixture. Thermal activation (60 °C) resulted in the highest removal of PAHs (99.1%) and persulfate consumption during thermal activation varied (0.45-1.38 g/kg soil). Persulfate consumption (0.91-1.22 g/kg soil) and PAHs removal (73.3-82.9%) varied using citrate chelated iron. No significant differences in oxidant consumption and PAH removal was measured in the H₂O₂-persulfate binary mixture and alkaline activated treatment systems, relative to the unactivated control. Greater removal of high molecular weight PAHs was measured with persulfate activation. Electron spin resonance spectra indicated the presence of hydroxyl radicals in thermally activated systems; weak hydroxyl radical activity in the H₂O₂-persulfate system; and superoxide radicals were predominant in alkaline activated systems. Differences in oxidative ability of the activated persulfate were related to different radicals generated during activation.
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Affiliation(s)
- Dan Zhao
- University of Chinese Academy of Sciences, Beijing 100049, China; , Zhongguancun Science Park Open Lab of Land Contaminaion Assessment and RemediationInstitute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China
| | - Xiaoyong Liao
- , Zhongguancun Science Park Open Lab of Land Contaminaion Assessment and RemediationInstitute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China.
| | - Xiulan Yan
- , Zhongguancun Science Park Open Lab of Land Contaminaion Assessment and RemediationInstitute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China
| | - Scott G Huling
- U.S. Environmental Protection Agency, National Risk Management Research Laboratory, Ground Water and Ecosystems Restoration Division, Ada, OK, United States
| | - Tuanyao Chai
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Huan Tao
- University of Chinese Academy of Sciences, Beijing 100049, China; , Zhongguancun Science Park Open Lab of Land Contaminaion Assessment and RemediationInstitute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China
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Tan J, Wang J, Chai T, Zhang Y, Feng S, Li Y, Zhao H, Liu H, Chai X. Functional analyses of TaHMA2, a P(1B)-type ATPase in wheat. Plant Biotechnol J 2013; 11:420-31. [PMID: 23294838 DOI: 10.1111/pbi.12027] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 10/16/2012] [Accepted: 10/30/2012] [Indexed: 05/18/2023]
Abstract
Currently, there are few studies concerning the function of heavy metal ATPase 2 (HMA2), particularly in monocotyledons, and the potential application of this protein in biofortification and phytoremediation. Thus, we isolated and characterized the TaHMA2 gene from wheat (Triticum aestivum L.). Our results indicate that TaHMA2 is localized to the plasma membrane and stably expressed, except in the nodes, which showed relatively high expression. Zinc/cadmium (Zn/Cd) resistance was observed in TaHMA2-transformed yeast. The over-expression of TaHMA2 increased the elongation and decreased the seed-setting rate in rice (Oryza sativa L.), but not Arabidopsis thaliana, tobacco (Nicotiana tabacum L.) or wheat. TaHMA2 over-expression also improved root-shoot Zn/Cd translocation, especially in rice. The seeds of transgenic rice and wheat, not tobacco, showed decreased Zn concentrations. The Zn concentration was decreased in all parts of the transgenic rice seeds, but was decreased only in the ventral endosperm of wheat, which showed an increased Zn concentration in the embryo and aleurone. The over-expression of TaHMA2 improved plant tolerance under moderate Zn stress and Zn deficiency, but Zn and Cd resistance decreased under high levels of Zn and Cd stress, respectively. The Cd concentration in transgenic rice seedlings was dramatically increased under Zn deficiency. Thus, over-expression of TaHMA2 showed a more obvious phenotype in monocotyledons than in dicotyledons. These findings provide important information for TaHMA2, and more efforts should be made in the future to characterize the reduced Zn concentration in TaHMA2 transgenic grains and the diversity of TaHMA2 substrate specificity.
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Affiliation(s)
- Jinjuan Tan
- College of Life Science, University of Chinese Academy of Science, Beijing, China
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49
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Zhao H, Wu L, Chai T, Zhang Y, Tan J, Ma S. The effects of copper, manganese and zinc on plant growth and elemental accumulation in the manganese-hyperaccumulator Phytolacca americana. J Plant Physiol 2012; 169:1243-1252. [PMID: 22796009 DOI: 10.1016/j.jplph.2012.04.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 04/02/2012] [Accepted: 04/15/2012] [Indexed: 05/28/2023]
Abstract
Synchrotron radiation X-ray fluorescence (SRXRF) and inductively coupled plasma mass spectrometry were used to estimate major, minor and trace elements in Cu-, Zn- and Mn-treated Phytolacca americana. The effects of the addition of Cu, Zn and Mn on morphological parameters, such as root length, shoot height, and fresh and dry weights of shoots and roots, were also examined. In addition, the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidases (GPX) and catalase (CAT) and the expression of Fe-SOD, Cu/Zn-SOD, metallothionein-2 and glutathione S-transferase (GST) exposed to the highest amounts of Cu, Zn or Mn were detected. Our results confirmed the following: (1) Zn supplementation leads to chlorosis, disturbed elemental homeostasis and decreased concentrations of micro- and macroelements such as Fe, Mg, Mn, Ca and K. Cu competed with Fe, Mn and Zn uptake in plants supplemented with 25 μM Cu. However, no antagonistic interactions took place between Cu, Zn, Mn and Fe uptake in plants supplemented with 100 μM Cu. Mn supplementation at various concentrations had no negative effects on elemental deficits. Mn was co-located with high concentrations of Fe and Zn in mature leaves and the concentrations of macro elements were unchanged. (2) P. americana supplemented with increased concentrations of Zn and Cu exhibited lower biomass production and reduced plant growth. (3) When plants were supplemented with the highest Zn and Cu concentrations, symptoms of toxicity corresponded to decreased SOD or CAT activities and increased APX and GPX activities. However, Mn tolerance corresponded to increased SOD and CAT activities and decreased POD and APX activities. Our study revealed that heavy metals partially exert toxicity by disturbing the nutrient balance and modifying enzyme activities that induce damage in plants. However, P. americana has evolved hyper accumulating mechanisms to maintain elemental balance and redox homeostasis under excess Mn.
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Affiliation(s)
- Huijun Zhao
- Department of Life Science, Graduate University of China Academy of Sciences, 19A, Yuquan Road, Shijingshan District, 100049 Beijing, China
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Zhang Y, Peng X, Chai T, Zhang C, Liu J. [Structure and function of tonoplast Cation/H+ antiporters in plant: a review]. Sheng Wu Gong Cheng Xue Bao 2011; 27:546-560. [PMID: 21847988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Cation transporters play important roles in modulating the concentration of intracellular metal ions. The vacuole is an important storage organelle for many ions. Cation (Ca+)/H+ antiporters (CAXs) located at vacuolar membrane are mainly involved in the Ca2+ flux into the vacuole, and appear to be capable of transporting various divalent cations to some degree. Several CAX genes have been isolated and characterized from various plants in recent years. Four domains of plant CAXs have been identified: NRR regulates Ca2+ transport by a mechanism of N-terminal autoinhibition; Ca domain and C domain confer Ca2+ and Mn2+ specificity among CAX transporters, respectively; D domain plays a part in the regulation of cytosolic pH. AtCAXs identified in Arabidopsis thaliana are involved in the growth, development and stress adaption of plant. AtCAX3 is the mainly Ca2+/H+ transporter in response to salt stress; AtCAX2 and AtCAX4 participate in transportation and detoxicification of heavy metal ions (Cd2+, Zn2+, and Mn2+) in cells under heavy metal stress, and impact root/shoot Cd partitioning in plant. These suggest that CAX genes may be useful for nutritional enhancement of plants, and for increasing phytoremediation potential. Here, the classification, structure and function of CAXs in plants are reviewed.
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Affiliation(s)
- Yuxiu Zhang
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijng 100083, China
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