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Chen W, Shi Y, Wang C, Qi X. AtERF13 and AtERF6 double knockout fine-tunes growth and the transcriptome to promote cadmium tolerance in Arabidopsis. Gene 2024; 911:148348. [PMID: 38467315 DOI: 10.1016/j.gene.2024.148348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/27/2024] [Accepted: 03/06/2024] [Indexed: 03/13/2024]
Abstract
The toxic heavy metal cadmium (Cd) restricts plant growth. However, how plants fine-tune their growth to modulate Cd resistance has not been determined. Ethylene response factors (ERFs) are key regulators of Cd stress, and Arabidopsis thaliana ERF13 and ERF6 (AtERF13 and AtERF6) negatively regulate growth. We previously demonstrated that AtERF13 is a transcriptional activator that binds a Cd-responsive element. Herein, we report that Arabidopsis plants improve Cd tolerance by repressing AtERF13 and AtERF6. We found that AtERF13 and AtERF6 were strongly downregulated by Cd stress and that AtERF6 weakly bound Cd-responsive elements. Moreover, AtERF13 physically interacted with AtERF6. Importantly, AtERF13 and AtERF6 double knockout mutants, but not single mutants or overexpression lines, grew better, tolerated more Cd and had higher Cd contents than did the wild type. Comparative transcriptome analysis revealed that the double mutants regulate the defense response to cope with Cd toxicity. Accordingly, we propose that, upon Cd stress, Arabidopsis plants repress AtERF13 and AtERF6 to relieve their growth inhibition effects and adjust the transcriptome to adapt to Cd stress, leading to increased Cd tolerance. Our findings thereby provide deep mechanical insights into how dual-function transcription factors fine-tune growth and the transcriptome to promote Cd tolerance in plants.
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Affiliation(s)
- Wanxia Chen
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement and College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Yang Shi
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement and College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Chunying Wang
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement and College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Xiaoting Qi
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement and College of Life Sciences, Capital Normal University, Beijing 100048, China.
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2
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Zhang Y, Zhou Q, Gao C, Lu Y, Sheng Y, Xiao M, Yun Y, Selvaraj JN, Zhang X, Li Y, Yu X. Endophytic bacteria for Cd remediation in rice: Unraveling the Cd tolerance mechanisms of Cupriavidus metallidurans CML2. J Hazard Mater 2024; 469:133846. [PMID: 38412644 DOI: 10.1016/j.jhazmat.2024.133846] [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: 11/29/2023] [Revised: 01/30/2024] [Accepted: 02/18/2024] [Indexed: 02/29/2024]
Abstract
The utility of endophytic bacteria in Cadmium (Cd) remediation has gained significant attention due to their ability to alleviate metal-induced stress and enhance plant growth. Here, we investigate C. metallidurans CML2, an endophytic bacterial strain prevalent in rice, showing resilience against 2400 mg/L of Cd(II). We conducted an in-depth integrated morphological and transcriptomic analysis illustrating the multifarious mechanisms CML2 employs to combat Cd, including the formation of biofilm and CdO nanoparticles, upregulation of genes involved in periplasmic immobilization, and the utilization of RND efflux pumps to extract excess Cd ions. Beyond Cd, CML2 exhibited robust tolerance to an array of heavy metals, including Mn2+, Se4+, Ni2+, Cu2+, and Hg2+, demonstrating effective Cd(II) removal capacity. Furthermore, CML2 has exhibited plant growth-promoting properties through the production of indole-3-acetic acid (IAA) at 0.93 mg/L, soluble phosphorus compounds at 1.11 mg/L, and siderophores at 22.67%. Supportively, pot experiments indicated an increase in root lengths and a decrease in Cd bioaccumulation in rice seedlings inoculated with CML2, consequently reducing Cd translocation rates from 43% to 31%. These findings not only contribute to the understanding of Cd resistance mechanisms in C. metallidurans, but also underscore CML2's promising application in Cd remediation within rice farming ecosystems.
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Affiliation(s)
- Yuan Zhang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Qi Zhou
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Chang Gao
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Yue Lu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Yang Sheng
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Ming Xiao
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Yueli Yun
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Jonathan Nimal Selvaraj
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Xianhua Zhang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Yadong Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Xuejing Yu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China.
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Pan C, Zhang M, Chen J, Lu H, Zhao X, Chen X, Wang L, Guo P, Liu S. miR397 regulates cadmium stress response by coordinating lignin polymerization in the root exodermis in Kandelia obovata. J Hazard Mater 2024; 471:134313. [PMID: 38669927 DOI: 10.1016/j.jhazmat.2024.134313] [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: 02/29/2024] [Revised: 04/08/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024]
Abstract
Secondary lignification of the root exodermis of Kandelia obovata is crucial for its response to adversity such as high salinity and anaerobic environment, and this lignification is also effective in blocking cadmium transport to the roots. However, how the differences in lignification of root exodermis at different developmental stages respond to Cd stress and its regulatory mechanisms have not been revealed. In this study, after analyzing the root structure and cell wall thickness using a Phenom scanning electron microscope as well as measuring cadmium content in the root cell wall, we found that the exodermis of young and mature roots of K. obovata responded to Cd stress through the polymerization of different lignin monomers, forming two different mechanisms: chelation and blocking. Through small RNA sequencing, RLM-5'-RACE and dual luciferase transient expression system, we found that miR397 targets and regulates KoLAC4/17/7 expression. The expression of KoLAC4/17 promoted the accumulation of guaiacyl lignin during lignification and enhanced the binding of cadmium to the cell wall. Meanwhile, KoLAC7 expression promotes the accumulation of syringyl lignin during lignification, which enhances the obstruction of cadmium and improves the tolerance to cadmium. These findings enhance our understanding of the molecular mechanisms underlying the differential lignification of the root exodermis of K. obovata in response to cadmium stress, and provide scientific guidance for the conservation of mangrove forests under heavy metal pollution.
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Affiliation(s)
- Chenglang Pan
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; Technology Innovation Center for Monitoringand Restoration Engineering of Ecological Fragile Zonein Southeast China, Ministry of Natural Resources, Fuzhou 350001, China.
| | - Mingxiong Zhang
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jianming Chen
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; Technology Innovation Center for Monitoringand Restoration Engineering of Ecological Fragile Zonein Southeast China, Ministry of Natural Resources, Fuzhou 350001, China
| | - Haoliang Lu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China
| | - Xuemei Zhao
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China
| | - Xiaofeng Chen
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China
| | - Lu Wang
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; Technology Innovation Center for Monitoringand Restoration Engineering of Ecological Fragile Zonein Southeast China, Ministry of Natural Resources, Fuzhou 350001, China
| | - Pingping Guo
- Fujian Minjiang River Estuary Wetland National Nature Reserve Administrative Office, Fuzhou 350001, China
| | - Shuyu Liu
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Liu C, Chang J, Yang J, Li H, Wu J, Wu J, Dai X, Wei F, Zhang X, Su X, Xia Z. Overexpression of NtDOGL4 improves cadmium tolerance through abscisic acid signaling pathway in tobacco. J Hazard Mater 2024; 465:133462. [PMID: 38215520 DOI: 10.1016/j.jhazmat.2024.133462] [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: 10/25/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 01/14/2024]
Abstract
The DELAY OF GERMINATION1-LIKE (DOGL) genes play an essential role in diverse biological processes in plants. However, their exact involvement in the response to cadmium (Cd) stress via the ABA pathway remains unclear. Here, we focused on NtDOGL4, a tobacco DOGL gene whose expression is highly induced upon exposure to Cd. Overexpression of NtDOGL4 in tobacco resulted in elevated endogenous ABA levels, reduced Cd accumulation, and increased tolerance to Cd. Moreover, NtDOGL4 overexpression led to decreased accumulation of reactive oxygen species (ROS) and improved ROS scavenging capacity under Cd stress. Further analyses revealed the direct binding of the transcription factor ABSCISIC ACID-INSENSITIVE 5 (ABI5) to the NtDOGL4 promoter, positively regulating its expression in tobacco. Notably, NtDOGL4 overexpression promoted suberin formation and deposition, while suppressing the expression of Cd transporter genes in tobacco roots, as evidenced by histochemical staining, suberin fraction determination, and qRT-PCR assays. Collectively, our results demonstrate that NtDOGL4 overexpression reduces Cd accumulation, thereby improving Cd stress tolerance through the modulation of antioxidant system, transcription of Cd transporters, and suberin deposition. Notably, the NtABI5-NtDOGL4 module functions as a positive regulator in tobacco's Cd tolerance, underscoring its potential as a molecular target for developing low-Cd crops to ensure environmental safety.
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Affiliation(s)
- Can Liu
- College of Life Science, Henan Agricultural University, Zhengzhou 450046, China; College of Tobacco Science, Henan Agricultural University, Zhengzhou 450046, China
| | - Jianbo Chang
- Henan Provincial Tobacco Company, Zhengzhou 450018, China
| | - Jianxin Yang
- Henan Provincial Tobacco Company, Zhengzhou 450018, China
| | - Hongchen Li
- Henan Provincial Tobacco Company, Zhengzhou 450018, China
| | - Jiang Wu
- Henan Provincial Tobacco Company, Zhengzhou 450018, China
| | - Junlin Wu
- Henan Provincial Tobacco Company, Zhengzhou 450018, China
| | - Xiaoyan Dai
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450046, China.
| | - Fengjie Wei
- Henan Provincial Tobacco Company, Zhengzhou 450018, China.
| | - Xiaoquan Zhang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450046, China.
| | - Xinhong Su
- Henan Provincial Tobacco Company, Zhengzhou 450018, China.
| | - Zongliang Xia
- College of Life Science, Henan Agricultural University, Zhengzhou 450046, China.
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Wu L, Wang R, Li M, Du Z, Jin Y, Shi Y, Jiang W, Chen J, Jiao Y, Hu B, Huang J. Functional analysis of a rice 12-oxo-phytodienoic acid reductase gene (OsOPR1) involved in Cd stress tolerance. Mol Biol Rep 2024; 51:198. [PMID: 38270739 DOI: 10.1007/s11033-023-09159-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/14/2023] [Indexed: 01/26/2024]
Abstract
BACKGROUND The accumulation of cadmium (Cd) in plants may compromise the growth and development of plants, thereby endangering human health through the food chain. Understanding how plants respond to Cd is important for breeding low-Cd rice cultivars. METHODS In this study, the functions of 12-oxo-phytodienoic acid reductase 1 (OsOPR1) were predicted through bioinformatics analysis. The expression levels of OsOPR1 under Cd stress were analyzed by using qRT-PCR. Then, the role that OsOPR1 gene plays in Cd tolerance was studied in Cd-sensitive yeast strain (ycf1), and the Cd concentration of transgenic yeast was analyzed using inductively coupled plasma mass spectrometry (ICP-MS). RESULTS Bioinformatics analysis revealed that OsOPR1 was a protein with an Old yellow enzyme-like FMN (OYE_like_FMN) domain, and the cis-acting elements which regulate hormone synthesis or responding abiotic stress were abundant in the promoter region, which suggested that OsOPR1 may exhibit multifaceted biological functions. The expression pattern analysis showed that the expression levels of OsOPR1 were induced by Cd stress both in roots and roots of rice plants. However, the induced expression of OsOPR1 by Cd was more significant in the roots compared to that in roots. In addition, the overexpression of OsOPR1 improved the Cd tolerance of yeast cells by affecting the expression of antioxidant enzyme related genes and reducing Cd content in yeast cells. CONCLUSION Overall, these results suggested that OsOPR1 is a Cd-responsive gene and may has a potential for breeding low-Cd or Cd-tolerant rice cultivars and for phytoremediation of Cd-contaminated in farmland.
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Affiliation(s)
- Longying Wu
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Ruolin Wang
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Mingyu Li
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Zhiye Du
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Yufan Jin
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Yang Shi
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Wenjun Jiang
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Ji Chen
- College of Agronomy, Sichuan Agricultural University, Sichuan, 611130, China.
| | - Yuan Jiao
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Binhua Hu
- Institute of Biotechnology and Nuclear Technology, Sichuan Academy of Agricultural Sciences, Sichuan, 610066, China
| | - Jin Huang
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China.
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Ding N, Cai J, Xiao S, Jiang L. Heterologous expression of rice OsEXO70FX1 confers tolerance to cadmium in Arabidopsis thaliana and fission yeast. Plant Physiol Biochem 2024; 206:108268. [PMID: 38091933 DOI: 10.1016/j.plaphy.2023.108268] [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: 06/13/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 02/15/2024]
Abstract
Cadmium (Cd) is an environmental toxicant that accumulates in grains, which greatly increases the risk of human exposure to Cd via food chain. The exocytosis of Cd is one of the essential detoxification mechanisms in plants. OsEXO70s, which facilitate the fusion of secretory vesicles and target membranes, has undergone significant expansion in rice. Here, we uncovered 40 OsEXO70 genes characterized by genome-wide profiling and focused on the potential functions of OsEXO70s, especially OsEXO70FX1, in Cd stress. Overexpression of OsEXO70FX1 enhanced both diamide and Cd tolerances in Schizosaccharomyces pombe (S. pombe), and in Arabidopsis resulted in 11% more seedlings survival rate and about 70% longer primary roots under Cd treatment compared with WT (empty vector). Meanwhile, Cd treatment upregulated the expression levels of some exocyst subunits in overexpression lines. Trichomes isolated from overexpression lines were observed to accumulate more Cd. Also, reactive oxygen species (ROS) induced by Cd stress reflected less sensitivity of OsEXO70FX1 overexpression lines to Cd stress, which was evidenced in the Cd determination assay. These results provide the fundament to future research on rice EXO70 family and suggest that it may have evolved a specialized role in response to Cd stress.
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Affiliation(s)
- Ning Ding
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.
| | - Jiajia Cai
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Shimin Xiao
- Shanwei Marine Industry Institute, Shanwei Institute of Technology, Shanwei, 516600, China
| | - Li Jiang
- Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design, Guangzhou Key Laboratory of Crop Gene Editing, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou, 510006, China
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Jiang N, Shi Y, Li M, Du Z, Chen J, Jiang W, Huang Y, Zhong M, Yang J, Hu B, Huang J. Expression of OsHARBI1-1 enhances the tolerance of Arabidopsis thaliana to cadmium. BMC Plant Biol 2023; 23:556. [PMID: 37950159 PMCID: PMC10638780 DOI: 10.1186/s12870-023-04540-0] [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: 03/08/2023] [Accepted: 10/18/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND As one of the major food crops in the world, rice is vulnerable to cadmium (Cd) pollution. Understanding of the molecular mechanisms of Cd uptake, transport and detoxification in rice is essential for the breeding of low-Cd rice. However, the molecular mechanisms underlying the response of rice to Cd stress remains to be further clarified. RESULTS In this study, a novel Cd-responsive gene OsHARBI1-1 was identified in the rice genome and its expression pattern and function were characterized. Bioinformatics analysis showed that the promoter region of OsHARBI1-1 had multiple cis-acting elements in response to phytohormones and stress, and the expression of OsHARBI1-1 was induced by phytohormones. OsHARBI1-1 protein was targeted to the nucleus. qRT-PCR analysis results showed that the expression of OsHARBI1-1 in the roots was repressed while the expression in the shoots was increased under Cd stress. Heterologous expression of OsHARBI1-1 in yeast conferred tolerance to Cd and reduced Cd content in the cells. Meanwhile, the expression of OsHARBI1-1 in Arabidopsis thaliana (A. thaliana) enhanced the tolerance of A. thaliana to Cd stress. In addition, compared with the wild type plants, the POD activity of transgenic plants was increased, while the SOD and CAT activities were decreased. Interestingly, the accumulation of Cd in the roots of A. thaliana expressing OsHARBI1-1 was significantly increased, whereas the Cd accumulation in the shoots was slightly decreased. Compared to the WT plants, the expression of genes related to Cd absorption and chelation was upregulated in transgenic A. thaliana under Cd stress, while the expression of genes responsible for the translocation of Cd from the roots to the shoots was downregulated. Moreover, the expression of phytohormone-related genes was significantly influenced by the expression of OsHARBI1-1 with and without Cd treatment. CONCLUSIONS Findings of this study suggest that OsHARBI1-1 might play a role in the response of plants to Cd response by affecting antioxidant enzyme activities, Cd chelation, absorption and transport, and phytohormone homeostasis and signaling.
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Affiliation(s)
- Nan Jiang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Yang Shi
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Mingyu Li
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Zhiye Du
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Ji Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wenjun Jiang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Yanyan Huang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, 611130, China
| | - Min Zhong
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Ju Yang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Binhua Hu
- Institute of Biotechnology and Nuclear Technology, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, China
| | - Jin Huang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China.
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Jiang WJ, Wang MT, Du ZY, Li JH, Shi Y, Wang X, Wu LY, Chen J, Zhong M, Yang J, Hu BH, Huang J. Bioinformatic and functional analysis of OsDHN2 under cadmium stress. Funct Integr Genomics 2023; 23:170. [PMID: 37209314 DOI: 10.1007/s10142-023-01101-4] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/22/2023]
Abstract
As a toxic heavy metal, cadmium (Cd) is one of the principal pollutants influencing rice productivity and food security. Despite several studies, the underlying mechanism of Cd response in plants remains largely unclear. Dehydrins are part of the late embryogenesis abundant (LEA) family which protect plants against abiotic stresses. In this study, a Cd-responsive LEA gene, OsDHN2, was functionally characterized. The chromosome localization results indicated that OsDHN2 was located on chromosome 2 of rice. Meanwhile, cis-acting elements, such as MBS (MYB binding site involved in drought-inducibility), ARE (anaerobic induction), and ABRE (abscisic acid), were present in the OsDHN2 promoter region. Expression pattern analysis also showed that OsDHN2 expression was induced in both roots and shoots under Cd stress. Overexpression of OsDHN2 improved Cd tolerance and reduced Cd concentration in yeast. Moreover, increased expression levels of SOD1, CTA1, GSH1, or CTT1 were found in transgenic yeast under Cd stress, suggesting the increased antioxidant enzymatic activities. These results suggested that OsDHN2 is a Cd-responsive gene that has the potential to improve resistance to Cd in rice.
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Affiliation(s)
- Wen-Jun Jiang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Meng-Ting Wang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Zhi-Ye Du
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Jia-Hao Li
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Yang Shi
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Xin Wang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Long-Ying Wu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Ji Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.
| | - Min Zhong
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Ju Yang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China
| | - Bin-Hua Hu
- Institute of Biotechnology and Nuclear Technology, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China
| | - Jin Huang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, China.
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Jin X, Wu P, Li P, Xiong C, Gui M, Huang W. Transcriptome analysis reveals insight into the protective effect of N-acetylcysteine against cadmium toxicity in Ganoderma lucidum (Polyporales: Polyporaceae). Environ Sci Pollut Res Int 2023; 30:58436-58449. [PMID: 36991205 DOI: 10.1007/s11356-023-26635-9] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 03/21/2023] [Indexed: 05/10/2023]
Abstract
Ganoderma lucidum is widely cultivated and used as traditional medicine in China and other Asian countries. As a member of macrofungi, Ganoderma lucidum is also prone to bioaccumulation of cadmium and other heavy metals in a polluted environment, which affects the growth and production of Ganoderma lucidum, as well as human health. N-Acetyl-L-cysteine (NAC) is considered a general antioxidant and free radical scavenger that is involved in the regulation of various stress responses in plants and animals. However, whether NAC could regulate cadmium stress responses in macrofungi, particularly edible fungi, is still unknown. In this work, we found that the exogenous NAC could alleviate Cd-induced growth inhibition and reduce the cadmium accumulation in Ganoderma lucidum. The application of the NAC cloud also inhibit cadmium-induced H2O2 production in the mycelia. By using transcriptome analysis, 2920 and 1046 differentially expressed unigenes were identified in "Cd100 vs CK" and "NAC_Cd100 vs Cd100," respectively. These differential unigenes were classified into a set of functional categories and pathways, which indicated that various biological pathways may play critical roles in the protective effect of NAC against Cd‑induced toxicity in Ganoderma lucidum. Furthermore, it suggested that the ATP-binding cassette transporter, ZIP transporter, heat shock protein, glutathione transferases, and Cytochrome P450 genes contributed to the increased tolerance to cadmium stress after NAC application in Ganoderma lucidum. These results provide new insight into the physiological and molecular response of Ganoderma lucidum to cadmium stress and the protective role of NAC against cadmium toxicity.
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Affiliation(s)
- Xin Jin
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Sichuan, 610061, Chengdu, China
| | - Peng Wu
- Yunnan Plateau Characteristic Agricultural Industry Research Institute, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Ping Li
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Sichuan, 610061, Chengdu, China
| | - Chuan Xiong
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Sichuan, 610061, Chengdu, China
| | - Mingying Gui
- Yunnan Plateau Characteristic Agricultural Industry Research Institute, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Wenli Huang
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Sichuan, 610061, Chengdu, China.
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10
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Zhang J, Zhang M, Zhang J, Wang F, Wang Y, Zheng L. Overexpression of RtSYP121 confers cadmium colerance by promoting vesicle trafficking, maintaining ion homeostasis, and alleviating photosynthetic inhibition in Arabidopsis. Ecotoxicol Environ Saf 2023; 252:114620. [PMID: 36773437 DOI: 10.1016/j.ecoenv.2023.114620] [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: 05/22/2022] [Revised: 10/22/2022] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Cadmium (Cd) is a toxic heavy metal in soil that seriously threatens crop production, food security, and human health. Syntaxins, a prototype family of Soluble N-ethyl-maleimide-associated protein receptors (SNAREs) involved in vesicle trafficking, are implicated in resistance to abiotic stresses, including Cd stress, but the molecular mechanisms underlying the involvement of syntaxins in Cd tolerance in plants are unclear. In this study, we isolated and functionally characterized the syntaxin gene RtSYP121 from Reaumuria trigyna to evaluate its potential for phytoremediation. RtSYP121 resides in the plasma membrane. The transcriptional level of RtSYP121 was strongly increased by salt, drought, and Cd stress. Overexpression of RtSYP121 significantly enhanced the Cd tolerance of transgenic Arabidopsis. The Cd tolerance of transgenic plants mainly depended on elevated vesicle trafficking, which increased the content of K+ and Ca2+ and thus decreased the accumulation of Cd2+ by regulating the delivery or activity of ion transporters, channels, and pumps. Moreover, overexpression of RtSYP121 in Arabidopsis ameliorated Cd stress-induced phytotoxic effects, including growth inhibition, ROS burst, photosynthetic impairment, and cell death. Therefore, we suggest that RtSYP121 plays multiple roles in the plant response to Cd stress by promoting vesicle trafficking, maintaining ion homeostasis, and alleviating photosynthetic inhibition.
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Affiliation(s)
- Jiayuan Zhang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Minister of Education, School of Life Sciences, Inner Mongolia University, Hohhot, China; State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Hohhot, China.
| | - Miao Zhang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Minister of Education, School of Life Sciences, Inner Mongolia University, Hohhot, China; State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Hohhot, China.
| | - Jian Zhang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Minister of Education, School of Life Sciences, Inner Mongolia University, Hohhot, China; State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Hohhot, China.
| | - Fang Wang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Minister of Education, School of Life Sciences, Inner Mongolia University, Hohhot, China; State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Hohhot, China.
| | - Yingchun Wang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Minister of Education, School of Life Sciences, Inner Mongolia University, Hohhot, China; State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Hohhot, China.
| | - Linlin Zheng
- Key Laboratory of Forage and Endemic Crop Biotechnology, Minister of Education, School of Life Sciences, Inner Mongolia University, Hohhot, China; State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Hohhot, China.
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11
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Tanwir K, Shahid M, Abbas S, Ali Q, Akram MS, Chaudhary HJ, Javed MT. Deciphering distinct root exudation, ionomics, and physio-biochemical attributes of Serratia marcescens CP-13 inoculated differentially Cd tolerant Zea mays cultivars. Environ Sci Pollut Res Int 2022; 29:71632-71649. [PMID: 35599287 DOI: 10.1007/s11356-022-20945-0] [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: 02/23/2022] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
Cadmium (Cd) being a non-essential, mobile, and toxic heavy metal, negatively affects the plant growth and physiology. Current work investigated the impact of Serratia marcescens CP-13 inoculation on root organic acids and nutrient exudates of two maize cultivars varying in Cd tolerance under induced Cd toxicity. Seedlings of Cd-sensitive (Sahiwal-2002) and Cd-tolerant (MMRI-Yellow) cultivars were grown either inoculated or non-inoculated with CP-13 in Petri plates having various Cd stress levels (0, 6, 12, 18, 24, 30 μM). Seedlings were transferred to rhizoboxes for the collection of root exudates and analysis of physio-biochemical traits. Both maize cultivars exuded higher organic acids and nutrient exudates under non-inoculated conditions as compared to inoculated ones. Non-inoculated tolerant cultivar exhibited higher nutrient accumulation, biomass, antioxidants, total chlorophyll, Cd release meanwhile reduced Cd uptake, lipid peroxidation, exudation of organic acids, and nutrients than the sensitive one. However, under CP-13 inoculation, Cd sensitive cultivar exhibited less exudation of organic acids (citric acid, acetic acid, malic acid, glutamic acid, formic acid, succinic acid, and oxalic acid), nutrients mobilization (K, Na, Zn, Ca, and Mg), total chlorophyll, antioxidants (APX, SOD, POD), total soluble sugar, diminished MDA, and Cd uptake. The significant reduction in release of root exudates by both cultivars was likely due to the plant growth promoting traits of CP-13 which confer Cd tolerance. The maximum release of rhizospheric root exudates were documented at 30 μM applied Cd stress. Therefore, the Serratia sp. CP-13 was proposed as a potential inoculant for bioremediation of Cd together with maize cultivars.
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Affiliation(s)
- Kashif Tanwir
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, 38000, Pakistan
| | - Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Qasim Ali
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Sohail Akram
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Muhammad Tariq Javed
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan.
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Mukherjee D, Pramanik K, Mandal S, Mandal NC. Augmented growth of Cd-stressed rice seedlings with the application of phytostimulating, root-colonizing, Cd-tolerant, leaf-endophytic fungi Colletotrichum spp. isolated from Eupatorium triplinerve. J Hazard Mater 2022; 438:129508. [PMID: 35999719 DOI: 10.1016/j.jhazmat.2022.129508] [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] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
The potential of plant growth-promoting endophytic fungi (PGPEF) in mycoremediation has received notable attention in recent years. Unlike other root-colonizing microorganisms, PGPEF colonization under Cadmium (Cd) stress is a less-revealed phenomenon. Among eighteen fungal isolates from the leaves of Eupatorium triplinerve, twelve were found as the species of Colletotrichum and remaining six belong to Fusarium based on phenotypic characterization. However, only two PGPEF isolates (ALE15 and ALE18) were finally selected based on possession of ACCD activity (~0.84 and 0.47 nM/µg protein/h, respectively) and higher Cd tolerance (1000 and 750 µg/mL, respectively). Moreover, the said isolates showed IAA production (~248 and 289 µg/mL), GA production (~86 and 88 AUs), phosphate solubilization (~165 and 256 µg/mL, respectively) under Cd stress. ALE18 strain was found to produce siderophore too. Molecular identification through sequencing of ITS region of both isolates confirmed their identity as species of Colletotrichum. Furthermore, FESEM-EDAX and AAS analyses supported their Cd bioaccumulation ability in mycelial cells that directly impacted to assist rice seedlings' (IR-36 cultivar) growth under Cd stress. Successful root colonization was also observed through FESEM and fluorescence microscopic studies. Finally, the detached leaf experiment with six economically important crops assured their applicability on field-scale as non-pathogenic PGPEF candidates.
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Affiliation(s)
- Debosmita Mukherjee
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Santiniketan 731235, West Bengal, India.
| | - Krishnendu Pramanik
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Santiniketan 731235, West Bengal, India.
| | - Subhrangshu Mandal
- Department of Earth and Environmental Science, University of Minnesota Twin Cities, Minneapolis, United States.
| | - Narayan Chandra Mandal
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Santiniketan 731235, West Bengal, India.
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Wu X, Chen Q, Chen L, Tian F, Chen X, Han C, Mi J, Lin X, Wan X, Jiang B, Liu Q, He F, Chen L, Zhang F. A WRKY transcription factor, PyWRKY75, enhanced cadmium accumulation and tolerance in poplar. Ecotoxicol Environ Saf 2022; 239:113630. [PMID: 35569299 DOI: 10.1016/j.ecoenv.2022.113630] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [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: 01/24/2022] [Revised: 04/06/2022] [Accepted: 05/08/2022] [Indexed: 06/15/2023]
Abstract
Cadmium (Cd) pollution has detrimental effects on the ecological environment and human health. Currently, phytoremediation is considered an environmentally friendly way to remediate Cd pollution. The application of transgenic plants to remediate soil pollution is a new technology that has emerged in recent years. In this study, PyWRKY75 was isolated and cloned from Populus yunnanensis, and the functionality of PyWRKY75 in woody plants (poplar) under Cd stress was verified. The increase in plant height of the OE-41 line (overexpression poplar) was 33.2% higher than that of the wild type (WT). Moreover, PyWRKY75 significantly promoted the absorption and accumulation of Cd in poplar, which increased by 51.32% in the OE-41 line when compared with the WT. The chlorophyll content of transgenic poplar leaves was higher than that of the WT, which reflected a protective mechanism of PyWRKY75. Other antioxidants, such as POD, SOD, CAT, APX, AsA, GSH and PCs, also made the transgenic poplars more tolerant to Cd, and they behaved differently in roots, stems and leaves. In general, PyWRKY75 played a potential role in regulating plant tolerance to Cd stress. This study provides a scientific basis and a new type of modified poplar for Cd pollution remediation.
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Affiliation(s)
- Xiaolu Wu
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Qi Chen
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Lulu Chen
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Feifei Tian
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Xiaoxi Chen
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Chengyu Han
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Jiaxuan Mi
- College of Forestry, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Xinyi Lin
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Xueqin Wan
- College of Forestry, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Beibei Jiang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Qinglin Liu
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Fang He
- College of Forestry, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Lianghua Chen
- College of Forestry, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Fan Zhang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China.
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14
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Wang Y, Tan P, Chang L, Yue Z, Zeng C, Li M, Liu Z, Dong X, Yan M. Exogenous proline mitigates toxic effects of cadmium via the decrease of cadmium accumulation and reestablishment of redox homeostasis in Brassica juncea. BMC Plant Biol 2022; 22:182. [PMID: 35395715 PMCID: PMC8991812 DOI: 10.1186/s12870-022-03538-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 09/30/2021] [Accepted: 03/16/2022] [Indexed: 05/05/2023]
Abstract
BACKGROUND As a vital osmoticum, proline has an important role in enhancing the tolerance of plants to environmental stress. It is unclear whether the application of exogenous proline can improve the tolerance of Brassica juncea to cadmium (Cd). RESULTS This study investigated the effects of different concentrations of proline (20, 40, 60, 80, and 100 mg/L) under Cd stress at different times (0 d, 2 d, and 7 d) on the growth and physiology of B. juncea. Treatment with exogenous proline not only increased the content of proline in B. juncea but also alleviated Cd-induced seedling growth inhibition via the maintenance of higher photosynthetic pigment content and cell viability and a decrease in the content of Cd. Moreover, it increased the activities of antioxidant enzymes and the glutathione/glutathione disulfide ratio to reduce the accumulation of reactive oxygen species. Compared with other concentrations, 60 mg/L of exogenous proline was the most effective at mitigating Cd toxicity in B. juncea. CONCLUSIONS Exogenous proline treatment enhanced the tolerance to Cd via a decrease in Cd accumulation and reestablishment of the redox homeostasis in B. juncea.
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Affiliation(s)
- Yuanduo Wang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China
| | - Piaopiao Tan
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China
| | - Liang Chang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China
| | - Zheming Yue
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China
| | - Chaozhen Zeng
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China
| | - Mei Li
- Crop Research Institute, Hunan Academy of Agricultural Sciences, 410125, Changsha, China
| | - Zhixiang Liu
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China.
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China.
| | - Xujie Dong
- Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life Science and Technology, Central South University of Forestry and Technology, 410004, Changsha, China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, 410004, Changsha, China
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, 410128, Changsha, China
| | - Mingli Yan
- Crop Research Institute, Hunan Academy of Agricultural Sciences, 410125, Changsha, China.
- Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization, Hunan University of Science and Technology, 411201, Xiangtan, China.
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15
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Xu C, Li Z, Wang J. Temporal and tissue-specific transcriptome analyses reveal mechanistic insights into the Solidago canadensis response to cadmium contamination. Chemosphere 2022; 292:133501. [PMID: 34995625 DOI: 10.1016/j.chemosphere.2021.133501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/16/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Understanding the cellular mechanisms mediating invasive plant adaptation to excessive cadmium (Cd) in environments is crucial for designing phytoremediation strategies for Cd-contaminated soils. Here we performed RNA sequencing on the root and leaf tissues of Solidago canadensis stressed by Cd for 0, 12, 24, and 48 h. Tissue-specific gene expression was notably significant, i.e., 76% (1667) of differentially expressed unigenes in the root and 78% (1856) in the leaf were exclusive to each tissue. Distinctive enrichment of gene functions was further observed in each tissue's response. In detail, adaptation of the root to Cd stress involved the up-regulation of genes encoding molecular chaperones (mainly heat shock proteins) and induction of some antioxidants, which may help cells scavenge reactive oxygen species (ROS). In comparison, leaf exposure to Cd ramped up the expression of genes associated with secondary metabolism, comprised mainly of cytochrome P450, but slowed down its photosynthetic functions, which seems to conserve energy for survival. Moreover, we highlighted candidate gene modules that are highly linked to physiological traits. Collectively, these observations suggest that S. canadensis may adopt a multipronged approach to actively cope with Cd stress, with both management of ROS accumulation and metabolic adjustment to optimize energy metabolism.
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Affiliation(s)
- Chanchan Xu
- College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Zeyu Li
- College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Jianbo Wang
- College of Life Sciences, Wuhan University, Wuhan, 430072, China.
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Teng Y, Guan W, Yu A, Li Z, Wang Z, Yu H, Zou L. Exogenous melatonin improves cadmium tolerance in Solanum nigrum L. without affecting its remediation potential. Int J Phytoremediation 2022; 24:1284-1291. [PMID: 35016578 DOI: 10.1080/15226514.2021.2025204] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Although Solanum nigrum L. is a phytoremediator for different metals, its growth and physiology are still influenced by toxic levels of cadmium (Cd). Thus, the development of eco-friendly strategies to enhance its tolerance, maintaining remediation potential is of special interest. The present work aimed to evaluate the effects of exogenous application of melatonin (MT) in the physiological and biochemical responses of S. nigrum and remediation potential exposed to Cd. After 30 days of exposure, the results revealed that Cd-mediated inhibitory effects on biomass and photosynthetic pigment synthesis were efficiently mitigated upon application of melatonin, without affecting Cd accumulation. Higher levels of Cd were found in roots, regardless of the pretreatment with the melatonin. Foliar application of melatonin, however, induced distinctive effects, lowering malondialdehyde (MDA), relative electrical conductivity (REL), and proline levels in shoots. These changes contributed to improvements in the water status, photosynthetic pigment synthesis, and biomass production of S. nigrum under Cd stresses. Overall, our results indicate a protective effect of melatonin on S. nigrum response to excess Cd, contributing to a better tolerance and growth rate, without disturbing its phytoremediation potential.Novelty statementAlthough Solanum nigrum L. is a phytoremediator for different metals, its growth and physiology are still influenced by toxic levels of cadmium. This study evaluated the potential of melatonin to boost S. nigrum defence against Cd toward a better growth rate and remediation potential.
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Affiliation(s)
- Yue Teng
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou, China
| | - Wenjie Guan
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
| | - An Yu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
| | - Zhishuai Li
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
| | - Zhenjun Wang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
| | - Hongyan Yu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
| | - Luyi Zou
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China
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17
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Ignatova L, Kistaubayeva A, Brazhnikova Y, Omirbekova A, Mukasheva T, Savitskaya I, Karpenyuk T, Goncharova A, Egamberdieva D, Sokolov A. Characterization of cadmium-tolerant endophytic fungi isolated from soybean ( Glycine max) and barley ( Hordeum vulgare). Heliyon 2021; 7:e08240. [PMID: 34765771 PMCID: PMC8570957 DOI: 10.1016/j.heliyon.2021.e08240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/08/2021] [Accepted: 10/20/2021] [Indexed: 11/29/2022] Open
Abstract
Cadmium stress disrupts plant-microbial interactions and reduces plant growth and development. In plants, the tolerance to stress can be increased by inoculation with endophytic microorganisms. The aim of this study was to investigate the distribution of endophytic fungi in various plant organs of barley and soybean and evaluate their Cd removal ability. Two hundred fifty-three fungal strains were isolated from various organs of barley (Hordeum vulgare cv Arna) and soybean (Glycine max cv Almaty). The colonization rate ranged from 13.6% to 57.3% and was significantly higher in the roots. Ten genera were identified: Fusarium, Penicillium, Aspergillus, Metarhizium, Beauveria, Trichoderma, Rhodotorula, Cryptococcus, Aureobasidium and Metschnikowia. Twenty-three fungal strains have a Cd tolerance index from 0.24 to 1.12. Five strains (Beauveria bassiana T7, Beauveria bassiana T15, Rhodotorula mucilaginosa MK1, Rhodotorula mucilaginosa RH2, Metschnikowia pulcherrima MP2) with the highest level of Cd tolerance have minimum inhibitory concentrations from 290 to 2400 μg/ml. These fungi were able to remove Cd up to 59%. The bioaccumulation capacity ranged from 2.3 to 11.9 mg/g. Selected fungal strains could be considered as biological agents for their potential application in the bioremediation of contaminated sites.
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Affiliation(s)
- Lyudmila Ignatova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Aida Kistaubayeva
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Yelena Brazhnikova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Anel Omirbekova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Togzhan Mukasheva
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Irina Savitskaya
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Tatyana Karpenyuk
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | - Alla Goncharova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
| | | | - Alexander Sokolov
- Center of Physico-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Kazakhstan
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18
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Wu X, Tian H, Li L, Guan C, Zhang Z. Higher Cd-accumulating oilseed rape has stronger Cd tolerance due to stronger Cd fixation in pectin and hemicellulose and higher Cd chelation. Environ Pollut 2021; 285:117218. [PMID: 33933876 DOI: 10.1016/j.envpol.2021.117218] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Oilseed rape (Brassica napus) has potential as a hyperaccumulator in the phytoremediation of cadmium (Cd)-contaminated soils. Oilseed rape varieties with higher Cd accumulation ability and Cd tolerance are ideal candidates for the hyperaccumulation of excess Cd. To explore the physiological and molecular mechanisms underlying Cd tolerance and high Cd accumulation in oilseed rape leaves, we examined two genotypes, "BN067" (Cd-sensitive with lower Cd accumulation in leaves) and "BN06" (Cd-tolerant with higher Cd accumulation in leaves). We characterized the physiological morphology, structure, subcellular distribution of Cd, cell wall components, cell chelates, and the transcriptional levels of the related genes. Greater Cd accumulation was observed in the cell walls and vacuoles of Cd-tolerant leaves, reducing Cd toxicity to the lamellar structure of the chloroplast thylakoid and leaf stomata. Higher expression of PMEs genes and lower expression of pectin methylesterase inhibitors (PMEI) genes improved pectin methylesterase (PME) activity in leaves of Cd-tolerant genotype. Stronger demethylation of pectin along with higher pectin and hemicellulose levels induced by lower pectinase and hemicellulose activities in the leaves of the Cd-tolerant genotype, resulting in higher Cd retention in the cell walls. Under Cd toxicity, higher Cd sequestration within the vacuoles of Cd-tolerant leaves was closely related to greater accumulation of Cd chelates with stronger biosynthesis in protoplasts. The results highlight the importance of using hyperaccumulation by plants to remediate our environment, and also provide a theoretical basis for the development of Cd-tolerant varieties.
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Affiliation(s)
- Xiuwen Wu
- College of Resources and Environmental Sciences, Qingdao Agricultural University, Qingdao, China.
| | - Hui Tian
- College of Resources and Environmental Sciences, Qingdao Agricultural University, Qingdao, China; Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, China
| | - Li Li
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, China
| | - Chunyun Guan
- National Center of Oilseed Crops Improvement, Hunan Branch, Changsha, China
| | - Zhenhua Zhang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, China.
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Yang G, Fu S, Huang J, Li L, Long Y, Wei Q, Wang Z, Chen Z, Xia J. The tonoplast-localized transporter OsABCC9 is involved in cadmium tolerance and accumulation in rice. Plant Sci 2021; 307:110894. [PMID: 33902855 DOI: 10.1016/j.plantsci.2021.110894] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [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: 10/11/2020] [Revised: 03/15/2021] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) is a highly toxic element to living organisms, and its accumulation in the edible portions of crops poses a potential threat for human health. The molecular mechanisms underlying Cd detoxification and accumulation are not fully understood in plants. In this study, the involvement of a C-type ABC transporter, OsABCC9, in Cd tolerance and accumulation in rice was investigated. The expression of OsABCC9 was rapidly induced by Cd treatment in a concentration-dependent manner in the root. The transporter, localized on the tonoplast, was mainly expressed in the root stele under Cd stress. OsABCC9 knockout mutants were more sensitive to Cd and accumulated more Cd in both the root and shoot compared to the wild-type. Moreover, the Cd concentrations in the xylem sap and grain were also significantly increased in the knockout lines, suggesting that more Cd was distributed from root to shoot and grain in the mutants. Heterologous expression of OsABCC9 in yeast enhanced Cd tolerance along with an increase of intracellular Cd content. Taken together, these results indicated that OsABCC9 mediates Cd tolerance and accumulation through sequestration of Cd into the root vacuoles in rice.
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Affiliation(s)
- Guangzhe Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Shan Fu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China; College of Life Sciences, Hubei Normal University, Huangshi, 435002, China
| | - Jingjing Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Longying Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Yan Long
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Qiuxing Wei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Zhigang Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Zhiwei Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Jixing Xia
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China.
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Rolón-Cárdenas GA, Arvizu-Gómez JL, Pacheco-Aguilar JR, Vázquez-Martínez J, Hernández-Morales A. Cadmium-tolerant endophytic Pseudomonas rhodesiae strains isolated from Typha latifolia modify the root architecture of Arabidopsis thaliana Col-0 in presence and absence of Cd. Braz J Microbiol 2021; 52:349-361. [PMID: 33236245 PMCID: PMC7966613 DOI: 10.1007/s42770-020-00408-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/19/2020] [Indexed: 10/22/2022] Open
Abstract
In this work, we isolated four Cd-tolerant endophytic bacteria from Typha latifolia roots that grow at a Cd-contaminated site. Bacterial isolates GRC065, GRC066, GRC093, and GRC140 were identified as Pseudomonas rhodesiae. These bacterial isolates tolerate cadmium and have abilities for phosphate solubilization, siderophore production, indole acetic acid (IAA) synthesis, and ACC deaminase activity, suggesting that they are plant growth-promoting rhizobacteria. Bacterial inoculation in Arabidopsis thaliana seedlings showed that P. rhodesiae strains increase total fresh weight and number of lateral roots concerning non-inoculated plants. These results indicated that P. rhodesiae strains promote A. thaliana seedlings growth by modifying the root system. On the other hand, in A. thaliana seedlings exposed to 2.5 mg/l of Cd, P. rhodesiae strains increased the number and density of lateral roots concerning non-inoculated plants, indicating that they modify the root architecture of A. thaliana seedlings exposed to cadmium. The results showed that P. rhodesiae strains promote the development of lateral roots in A. thaliana seedlings cultivated in both conditions, with and without cadmium. These results suggest that P. rhodesiae strains could exert a similar role inside the roots of T. latifolia that grow in the Cd-contaminated environment.
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Affiliation(s)
- Gisela Adelina Rolón-Cárdenas
- Posgrado en Ciencias Químicas, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico
- Facultad de Estudios Profesionales Zona Huasteca, Universidad Autónoma de San Luis Potosí, Romualdo del Campo 501, Fraccionamiento Rafael Curiel, CP 79060, Ciudad Valles, San Luis Potosí, Mexico
| | - Jackeline Lizzeta Arvizu-Gómez
- Secretaría de Investigación y Posgrado, Centro Nayarita de Innovación y Transferencia de Tecnología (CENITT), Universidad Autónoma de Nayarit, Tepic, Nayarit, Mexico
| | | | - Juan Vázquez-Martínez
- Departamento de Ingeniería Bioquímica, Tecnológico Nacional de México (TecNM), Instituto Tecnológico Superior de Irapuato, Irapuato, Guanajuato, Mexico
| | - Alejandro Hernández-Morales
- Posgrado en Ciencias Químicas, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico.
- Facultad de Estudios Profesionales Zona Huasteca, Universidad Autónoma de San Luis Potosí, Romualdo del Campo 501, Fraccionamiento Rafael Curiel, CP 79060, Ciudad Valles, San Luis Potosí, Mexico.
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Abbas S, Javed MT, Shahid M, Hussain I, Haider MZ, Chaudhary HJ, Tanwir K, Maqsood A. Acinetobacter sp. SG-5 inoculation alleviates cadmium toxicity in differentially Cd tolerant maize cultivars as deciphered by improved physio-biochemical attributes, antioxidants and nutrient physiology. Plant Physiol Biochem 2020; 155:815-827. [PMID: 32882619 DOI: 10.1016/j.plaphy.2020.08.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 04/30/2020] [Revised: 08/08/2020] [Accepted: 08/10/2020] [Indexed: 05/27/2023]
Abstract
Cadmium is a phytotoxic metal which threatens the global food safety owing to its higher retention rates and non-biodegradable nature. Optimal study of microbe-assisted bioremediation is a potential way to minimize the adversities of Cd on plants. Current study was aimed to isolate, identify and characterize Cd tolerant PGPBs from industrially contaminated soil and to evaluate the potential of plant-microbe synergy for the growth augmentation and Cd remediation. The Acinetobacter sp. SG-5, identified through 16S rRNA gene sequence analysis, was able to tolerate 1000 mg/l of applied Cd stress and ability of in vitro indole-3-acetic acid production, phosphate solubilization, as well as 1-aminocyclopropane-1-carboxylic acid deaminase activity. A Petri plate experiment was designed to investigate the impact of Acinetobacter sp. SG-5 on applied Cd toxicity (0, 6, 12, 18, 24, 30 μM) in maize cultivars (3062-Cd tolerant, 31P41-Cd susceptible). Results revealed that non-inoculated maize plants were drastically affected with applied Cd treatments for growth, antioxidants and mineral ions acquisition predominantly in susceptible cultivar (31P41). PGPB inoculation positively influenced the maize growth by enhanced anti-oxidative potential coupled with optimum level of nutrients (K, Ca, Mg, Zn). Analysis of morpho-physio-biochemical traits after PGPB application revealed that substantial Cd tolerance was acquired by susceptible cv. 31P41 than tolerant cv. 3062 under applied Cd regimes. Research outcomes may be important for understanding the growth responses of Cd susceptible and tolerant maize cultivars under Acinetobacter sp. SG-5 inoculation and likely to provide efficient approaches to reduce Cd retention in edible plant parts and/or Cd bioremediation.
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Affiliation(s)
- Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Tariq Javed
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan.
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, 38000, Pakistan
| | - Iqbal Hussain
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Zulqurnain Haider
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Kashif Tanwir
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Awais Maqsood
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, 38000, Pakistan
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22
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Zaid A, Mohammad F, Fariduddin Q. Plant growth regulators improve growth, photosynthesis, mineral nutrient and antioxidant system under cadmium stress in menthol mint ( Mentha arvensis L.). Physiol Mol Biol Plants 2020; 26:25-39. [PMID: 32158118 PMCID: PMC7036404 DOI: 10.1007/s12298-019-00715-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/01/2019] [Accepted: 09/16/2019] [Indexed: 05/02/2023]
Abstract
Menthol mint (Mentha arvensis L.) cultivation is significantly affected by the heavy metals like cadmium (Cd) which also imposes severe health hazards. Two menthol mint cultivars namely Kosi and Kushal were evaluated under Cd stress conditions. Impact of plant growth regulators (PGRs) like salicylic acid (SA), gibberellic acid (GA3) and triacontanol (Tria) on Cd stress tolerance was assessed. Reduced growth, photosynthetic parameters, mineral nutrient concentration, and increased oxidative stress biomarkers like electrolyte leakage, malondialdehyde, and hydrogen peroxide contents were observed under Cd stress. Differential upregulation of proline content and antioxidant activities under Cd stress was observed in both the cultivars. Interestingly, low electrolyte leakage, lipid peroxidation, hydrogen peroxide and Cd concentration in leaves were observed in Kushal compared to Kosi. Among all the PGRs tested, SA proved to be the best in improving Cd-stress tolerance in both the cultivars but Kushal responded better than Kosi.
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Affiliation(s)
- Abbu Zaid
- Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002 India
| | - Firoz Mohammad
- Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002 India
| | - Qazi Fariduddin
- Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002 India
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23
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Rono MK, Muturi CN, Ochieng R, Mwakubabanya R, Wachira FN, Mwangangi J, Kinyanjui S, Njunge J, Mireji PO. Cadmium tolerance pathway in Anopheles gambiae senso stricto. Acta Trop 2019; 198:105033. [PMID: 31121147 DOI: 10.1016/j.actatropica.2019.05.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 05/16/2019] [Accepted: 05/18/2019] [Indexed: 02/05/2023]
Abstract
Cadmium is one of the widely used heavy metals (HM) in commercial and industrial products and contributes to environmental contamination in an urban setting. In our previous studies, we established that An. gambiae sensu stricto, a vector of malaria, had adapted to HM pollutants in nature despite their proclivity for unpolluted aquatic habitats. We further demonstrated that heavy metal tolerance adaptation process impacts a biological cost to the fitness of the mosquito and potentially involves the induction of specific HM-responsive transcripts and proteins. Here we interrogated differential proteomic profiles of the cadmium tolerant vs. naïve strains of An. gambiae to shed light on proteomic processes that underpinned biological cost to fitness. We identified a total of 1067 larval proteins and observed significant down-regulation of proteins involved in larval immune responses, energy metabolism, antioxidant enzymes, protein synthesis, and proton transport. Our results suggest that mosquitoes can adjust their biological program through proteome changes to counter HM pollution. Since our study was done in controlled laboratory settings, we acknowledge this may not wholly represent the conditions HM polluted environments. Nevertheless, mosquitoes deploying this strategy have the potential of creating an urban enclave for breeding and thrive and become agents of sporadic malaria epidemics.
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Li Y, Zeng J, Wang S, Lin Q, Ruan D, Chi H, Zheng M, Chao Y, Qiu R, Yang Y. Effects of cadmium-resistant plant growth-promoting rhizobacteria and Funneliformis mosseae on the cadmium tolerance of tomato ( Lycopersicon esculentum L.). Int J Phytoremediation 2019; 22:451-458. [PMID: 31564121 DOI: 10.1080/15226514.2019.1671796] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Microorganisms are used to alleviate heavy metal stress in plants cultivated in contaminated fields. However, the relevant mechanisms have been rarely explored. The goal of this study was to investigate effects of arbuscular mycorrhizal fungus Funneliformis mosseae and two Cd-resistant bacterial strains (Enterobacter sp. EG16 and Enterobacter ludwigii DJ3) on growth and Cd tolerance of tomato when applied with different inoculation strategies (single or dual) and Cd concentrations (50 and 100 mg kg-1). Better plant growth was observed in mycorrhizal alone or combined treatments. In F. mosseae and EG16 co-inoculation treatment, shoot and root dry weight were 119-154% and 91-173% higher than those of the control, respectively. Higher bacterial and mycorrhizal colonization rate and root Cd concentration were also found in this treatment. However, the decrease of shoot Cd concentration and translocation factor values indicated this treatment was effective in improving Cd tolerance of the host plants. In addition, the increase in soil pH and decline in bioavailable Cd in the rhizosphere might be partly involved in reduction of Cd accumulation in plants. Our results suggest that co-inoculation with suitable microorganisms is important in plant growth and tolerance to Cd in Cd-contaminated soil.
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Affiliation(s)
- Yuanyuan Li
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Jiahui Zeng
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Shizhong Wang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
- Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou, China
- Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Guangzhou, China
| | - Qingqi Lin
- School of Geography and Planning, Sun Yat-Sen University, Guangzhou, China
| | - Dishen Ruan
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Haochun Chi
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Mengyuan Zheng
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Yuanqing Chao
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
- Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou, China
- Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Guangzhou, China
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
- Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou, China
- Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Guangzhou, China
| | - Yanhua Yang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
- Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou, China
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25
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Chuanboon K, Na Nakorn P, Pannengpetch S, Laengsri V, Nuchnoi P, Isarankura-Na-Ayudhya C, Isarankura-Na-Ayudhya P. Proteomics and bioinformatics analysis reveal potential roles of cadmium-binding proteins in cadmium tolerance and accumulation of Enterobacter cloacae. PeerJ 2019; 7:e6904. [PMID: 31534833 PMCID: PMC6727835 DOI: 10.7717/peerj.6904] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/03/2019] [Indexed: 01/01/2023] Open
Abstract
Background Enterobacter cloacae (EC) is a Gram-negative bacterium that has been utilized extensively in biotechnological and environmental science applications, possibly because of its high capability for adapting itself and surviving in hazardous conditions. A search for the EC from agricultural and industrial areas that possesses high capability to tolerate and/or accumulate cadmium ions has been conducted in this study. Plausible mechanisms of cellular adaptations in the presence of toxic cadmium have also been proposed. Methods Nine strains of EC were isolated and subsequently identified by biochemical characterization and MALDI-Biotyper. Minimum inhibitory concentrations (MICs) against cadmium, zinc and copper ions were determined by agar dilution method. Growth tolerance against cadmium ions was spectrophotometrically monitored at 600 nm. Cadmium accumulation at both cellular and protein levels was investigated using atomic absorption spectrophotometer. Proteomics analysis by 2D-DIGE in conjunction with protein identification by QTOF-LC-MS/MS was used to study differentially expressed proteins between the tolerant and intolerant strains as consequences of cadmium exposure. Expression of such proteins was confirmed by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Bioinformatics tools were applied to propose the functional roles of cadmium-binding protein and its association in cadmium tolerance mechanisms. Results The cadmium-tolerant strain (EC01) and intolerant strain (EC07) with the MICs of 1.6 and 0.4 mM, respectively, were isolated. The whole cell lysate of EC01 exhibited approximately two-fold higher in cadmium binding capability than those of the EC07 and ATCC 13047, possibly by the expression of Cd-binding proteins. Our proteomics analysis revealed the higher expression of DUF326-like domain (a high cysteine-rich protein) of up to 220 fold in the EC01 than that of the EC07. Confirmation of the transcription level of this gene by qRT-PCR revealed a 14-fold induction in the EC01. Regulation of the DUF326-like domain in EC01 was more pronounced to mediate rapid cadmium accumulation (in 6 h) and tolerance than the other resistance mechanisms found in the ATCC 13047 and the EC07 strains. The only one major responsive protein against toxic cadmium found in these three strains belonged to an antioxidative enzyme, namely catalase. The unique proteins found in the ATCC 13047 and EC07 were identified as two groups: (i) ATP synthase subunit alpha, putative hydrolase and superoxide dismutase and (ii) OmpX, protein YciF, OmpC porin, DNA protection during starvation protein, and TrpR binding protein WrbA, respectively. Conclusion All these findings gain insights not only into the molecular mechanisms of cadmium tolerance in EC but also open up a high feasibility to apply the newly discovered DUF326-like domain as cadmium biosorbents for environmental remediation in the future.
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Affiliation(s)
- Kitipong Chuanboon
- Department of Medical Technology and Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand.,Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Piyada Na Nakorn
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Supitcha Pannengpetch
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Vishuda Laengsri
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Pornlada Nuchnoi
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | | | - Patcharee Isarankura-Na-Ayudhya
- Department of Medical Technology and Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand
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Luo JS, Gu T, Yang Y, Zhang Z. A non-secreted plant defensin AtPDF2.6 conferred cadmium tolerance via its chelation in Arabidopsis. Plant Mol Biol 2019; 100:561-569. [PMID: 31053987 DOI: 10.1007/s11103-019-00878-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 04/25/2019] [Indexed: 05/27/2023]
Abstract
Plant defensin AtPDF2.6 is not secreted to the apoplast and localized in cytoplasm. AtPDF2.6 is mainly expressed in root vascular bundles of xylem parenchyma cell, and significantly induced by Cd stress. AtPDF2.6 detoxicate cytoplasmic Cd via chelation, thus enhanced Cd tolerance in Arabidopsis. In order to detoxify the heavy metal cadmium (Cd), plants have evolved several mechanisms, among which chelation represents the major Cd-detoxification mechanism. In this study, we aimed to identify a new defensin protein involved in cytoplasmic Cd detoxification by using plant molecular genetics and physiological methods. The results of bioinformatic analysis showed that the Arabidopsis thaliana defensin gene AtPDF2.6 has a signal peptide that may mediate its secretion to the cell wall. Subcellular localization analysis revealed that AtPDF2.6 is localized to the cytoplasm and is not secreted to the apoplast, whereas histochemical analysis indicated that AtPDF2.6 is mainly expressed in the root xylem parenchyma cells and that its expression is significantly induced by Cd. An in vitro Cd-binding assay revealed that AtPDF2.6 has Cd-chelating activity. Heterologous overexpression of AtPDF2.6 increased Cd tolerance in Escherichia coli and yeast, and AtPDF2.6 overexpression significantly enhanced Cd tolerance in Arabidopsis, whereas functional disruption of AtPDF2.6 decreased Cd tolerance. These data suggest that AtPDF2.6 detoxifies cytoplasmic Cd via chelation and thereby enhances Cd tolerance in Arabidopsis. Our findings accordingly challenge the commonly accepted view of defensins as secreted proteins.
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Affiliation(s)
- Jin-Song Luo
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China
- Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Nutrition in Common University, National Engineering Laboratory on Soil and Fertilizer Resources Efficient Utilization, Changsha, 410128, China
| | - Tianyu Gu
- National Key Laboratory of Plant Molecular Genetics and CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Yong Yang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China
- Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Nutrition in Common University, National Engineering Laboratory on Soil and Fertilizer Resources Efficient Utilization, Changsha, 410128, China
| | - Zhenhua Zhang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China.
- Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Nutrition in Common University, National Engineering Laboratory on Soil and Fertilizer Resources Efficient Utilization, Changsha, 410128, China.
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27
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Wang M, Duan S, Zhou Z, Chen S, Wang D. Foliar spraying of melatonin confers cadmium tolerance in Nicotiana tabacum L. Ecotoxicol Environ Saf 2019; 170:68-76. [PMID: 30529622 DOI: 10.1016/j.ecoenv.2018.11.127] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [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: 10/20/2018] [Revised: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 05/23/2023]
Abstract
Melatonin is a multifunctional signaling molecule that regulates broad aspects of responses to environmental stresses in plants. Cadmium (Cd) is a persistent soil contaminant that is toxic to all living organisms. Recent reports have uncovered the protective role of melatonin in alleviating Cd phytotoxicity, but little is known about its regulatory mechanisms in plants. In this study, we found that foliar application of melatonin (in particular 100 μmol L-1) remarkably enhanced Cd tolerance of tobacco (Nicotiana tabacum L.) leaves, as evidenced by less Cd accumulation and alleviation of growth inhibition and photoinhibition, compared with nontreated Cd-stressed plants. The addition of melatonin also controlled oxidative damage of Cd on tobacco through direct scavenging and by enhancing the activities of antioxidative enzymes. Melatonin application promoted Cd sequestration in the cell wall and vacuoles based on the analysis of subcellular distribution of Cd in tobacco cells. Structural equation modeling (SEM) analysis revealed that melatonin-induced Cd tolerance in tobacco leaves was modulated by the expression of Cd-transport genes. Molecular evidence illustrated that modulation of IRT1, Nramp1, HMA2, HMA4, and HMA3 genes caused by melatonin could be responsible for weakening Cd uptake, Cd transportation to xylem, and intensifying Cd sequestration into the root vacuoles.
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Affiliation(s)
- Meng Wang
- Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Shuhui Duan
- Hunan Tobacco Science Institute, Changsha 410010, PR China
| | - Zhicheng Zhou
- Hunan Tobacco Science Institute, Changsha 410010, PR China
| | - Shibao Chen
- Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
| | - Duo Wang
- College of Energy, Xiamen University, Xiamen, Fujian 361102, PR China
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Li C, Xu Y, Li L, Yang X, Wang Y. Acid stress induces cross-protection for cadmium tolerance of multi-stress-tolerant Pichia kudriavzevii by regulating cadmium transport and antioxidant defense system. J Hazard Mater 2019; 366:151-159. [PMID: 30513442 DOI: 10.1016/j.jhazmat.2018.11.101] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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: 08/09/2018] [Revised: 10/27/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
The toxicity of cadmium (Cd) is the major limitation to its removal using microorganisms. The Cd tolerance of Pichia kudriavzevii was obviously enhanced by acid stress based on multi-stress cross-protection. RNA-Seq showed that most differentially expressed genes (DEGs) in the Pentose phosphate pathway, Citrate cycle (TCA cycle), Glycolysis/Gluconeogenesis, Peroxisome and Glutathione metabolism were up-regulated by acid stress. The up-regulated expression of genes related to ATP synthesis (GOR1, ALD5, ADH4, ADH6, MDH2, IDH1, IDH2, and ATP19) and Cd transport (GSTY2, GTO2, GLO2, and YOR1), and the improvement of intracellular GSH level and GST activity, reduced the Cd toxicity towards P. kudriavzevii. Cd efflux by YOR1 played a key role in the decline of intracellular Cd level. Acid stress obviously improved the gene expression levels and activities of antioxidant enzymes (SOD, POD, and CAT), which inhibited the Cd-induced ROS outburst and oxidative damage of proteins and membrane lipids. In addition, the enhanced expression of HSP12 protected P. kudriavzevii from the damage of Cd stress. These results provide some important clues to reconstruct robust strains using for Cd removal in aquatic environments.
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Affiliation(s)
- Chunsheng Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Ying Xu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Laihao Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Xianqing Yang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China.
| | - Yueqi Wang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
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Zorrig W, Cornu JY, Maisonneuve B, Rouached A, Sarrobert C, Shahzad Z, Abdelly C, Davidian JC, Berthomieu P. Genetic analysis of cadmium accumulation in lettuce (Lactuca sativa). Plant Physiol Biochem 2019; 136:67-75. [PMID: 30658286 DOI: 10.1016/j.plaphy.2019.01.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 09/10/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 05/01/2023]
Abstract
This work characterized mechanisms controlling cadmium (Cd) tolerance and accumulation in lettuce at both the physiological and genetic levels. These traits were evaluated in 18 Lactuca accessions representing a large genetic diversity. Cd tolerance and accumulation in roots and shoots as well as Cd translocation from roots to the shoot varied independently, and with a significant range of variation. Analyses of F1 progenies of crosses between cultivars with contrasted phenotypes showed that high tolerance to Cd, low Cd accumulation and low Cd root-shoot translocation were recessive traits. Results of analyses of F2 progenies of different crosses suggest that root Cd concentration and root-shoot Cd translocation were under a complex genetic determinism involving at least two loci. This work thus revealed that limiting both Cd accumulation and Cd root-shoot translocation in lettuce is possible and depends on recessive loci. Differences in the ability to accumulate Cd in roots in the long term could not be linked to differences in short-term 109Cd uptake into, or efflux from, roots. In contrast, the cultivar with the highest root-shoot Cd translocation was the same in the long term and in the short term, which suggests that this trait relies on processes that are implemented quickly (i.e. in less than three days) after the start of Cd exposure.
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Affiliation(s)
- Walid Zorrig
- BPMP, Montpellier SupAgro, CNRS, INRA, Université de Montpellier, France; Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cédria, BP 901, Hammam-Lif 2050, Tunisie
| | - Jean-Yves Cornu
- ISPA, Bordeaux Sciences Agro, INRA, 33140, Villenave d'Ornon, France.
| | - Brigitte Maisonneuve
- INRA, UR Génétique et Amélioration des Fruits et Légumes, 1052 Domaine St Maurice, BP 94, 84143, Montfavet Cédex, France
| | - Aïda Rouached
- BPMP, Montpellier SupAgro, CNRS, INRA, Université de Montpellier, France
| | - Catherine Sarrobert
- Groupe de Recherches Appliquées en Phytotechnologie, DEVM, CEN Cadarache, 13108, St Paul les Durance, France
| | - Zaigham Shahzad
- BPMP, Montpellier SupAgro, CNRS, INRA, Université de Montpellier, France
| | - Chedly Abdelly
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cédria, BP 901, Hammam-Lif 2050, Tunisie
| | | | - Pierre Berthomieu
- BPMP, Montpellier SupAgro, CNRS, INRA, Université de Montpellier, France
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Li C, Yang X, Xu Y, Li L, Wang Y. Cadmium detoxification induced by salt stress improves cadmium tolerance of multi-stress-tolerant Pichia kudriavzevii. Environ Pollut 2018; 242:845-854. [PMID: 30036838 DOI: 10.1016/j.envpol.2018.07.058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/14/2018] [Accepted: 07/14/2018] [Indexed: 05/28/2023]
Abstract
Heavy metal tolerance of microorganisms is the basis of heavy metal removal by growing cells. In this study, a cross-protection effect generated by salt stress significantly enhanced the cadmium tolerance of multi-stress-tolerant Pichia kudriavzevii. Comparative transcriptome analysis using RNA-Seq linked with physiological and biochemical observation was used to elucidate the underlying mechanisms of the improved cadmium tolerance. The expression of cadmium transport related genes (GSTY2, GLR1, GLO2, YCF1 and YOR1), GSH content and GST activity were elevated by salt stress, suggesting enhanced cadmium conjugation and detoxification in yeast cells. The inhibited cadmium uptake by ZRT1 and enhanced cadmium efflux by YOR1 contributed to the decrease in the intracellular cadmium concentration. The improved expression of antioxidant enzyme genes (SOD1, SOD2, SOD6, CAT1 and PRXIID), along with the enhanced activities of antioxidant enzymes (SOD, CAT and POD) resulted in a decrease in cadmium-induced ROS production, protein carbonylation, lipid peroxidation and cell death. The abundant expression of heat shock protein genes (HSP12, HSP10 and SSC1) and genes related to trehalose synthesis (TPS1 and TSL1) induced by salt stress protected yeast cells against complex stress conditions, contributing to the improved cadmium tolerance. These findings will be useful to develop cadmium-tolerant yeasts for cadmium removal by growing cells.
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Affiliation(s)
- Chunsheng Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Xianqing Yang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China.
| | - Ying Xu
- Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Laihao Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Yueqi Wang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, National R&D Center for Aquatic Product Processing, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
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Ali N, Hadi F. CBF/DREB transcription factor genes play role in cadmium tolerance and phytoaccumulation in Ricinus communis under molybdenum treatments. Chemosphere 2018; 208:425-432. [PMID: 29885509 DOI: 10.1016/j.chemosphere.2018.05.165] [Citation(s) in RCA: 8] [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: 07/04/2017] [Revised: 05/25/2018] [Accepted: 05/27/2018] [Indexed: 06/08/2023]
Abstract
The C-repeat binding factor/dehydration responsive element binding proteins (CBF/DREB) constitute a large group of transcriptional factors. Their role in abiotic stresses such as drought, salinity and low temperature tolerance in plants have been well established, while little information about their role in metals stress tolerance is available. Transcriptomic analyses of four genes (DREB-1A, DREB-1B, DREB-1F and CBF) were carried out in industrially important plant Ricinus communis under cadmium (Cd) and molybdenum (Mo) treatments. Cadmium (in soil) and Mo (as foliar spray) were used separate as well as in combinations. All the genes (except DREB 1A) expressed under Cd stress, while Mo further enhanced their expression. The proline (55.68 ± 5.51 ppm) and phenolic (120.00 ± 14.40 ppm) contents were significant increase in combination treatments of Cd and Mo. Positive and significant correlations of DREB 1B, DREB 1F and CBF genes expressions with free proline (0.92, 0.93 and 0.88 respectively), phenolic (075, 0.77 and 0.62 respectively) contents and Cd accumulation were demonstrated. Nucleotide sequence of R. comunis DREB1F and CBF genes showed more than 80% homology with related genes of other flowering plants. Predicted amino acids sequence of R. communis DREB 1F and CBF protein fragment demonstrated more than 75% homology with related proteins from other flowering plants.
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Affiliation(s)
- Nasir Ali
- Department of Biotechnology, University of Malakand, Chakdara, 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan; Institute of Biological Sciences, Sarhad University of Science and Information Technology, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan.
| | - Fazal Hadi
- Department of Biotechnology, University of Malakand, Chakdara, 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan
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Guan MY, Zhang HH, Pan W, Jin CW, Lin XY. Sulfide alleviates cadmium toxicity in Arabidopsis plants by altering the chemical form and the subcellular distribution of cadmium. Sci Total Environ 2018; 627:663-670. [PMID: 29426190 DOI: 10.1016/j.scitotenv.2018.01.245] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [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: 12/20/2017] [Revised: 01/22/2018] [Accepted: 01/24/2018] [Indexed: 05/22/2023]
Abstract
Several sulfur compounds are thought to play important roles in the plant tolerance to cadmium (Cd), but the role of inorganic sulfide in Cd tolerance remains largely unknown. In this study, we found that Cd exposure increased the accumulation of soluble sulfide in Arabidopsis plants. When exogenous sulfide, in the form of NaHS, was foliarly applied, Cd-induced growth inhibition and oxidative stress were alleviated. In addition, although the foliar application of sulfide did not affect the total Cd levels, it significantly decreased the soluble Cd fractions in plants. Furthermore, foliar applications of sulfide decreased Cd distribution in the cytoplasm and organelles, but increased Cd retention in the cell wall, which is a less sensitive compartment. These results suggest that the Cd-induced accumulation of soluble sulfide alleviates Cd toxicity in plants by inactivating Cd and sequestering it into the cell wall.
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Affiliation(s)
- Mei Yan Guan
- State Key Laboratory of Plant Physiology and Biochemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hai Hua Zhang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wei Pan
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Chong Wei Jin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Xian Yong Lin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
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Li ZG, Duan XQ, Xia YM, Wang Y, Zhou ZH, Min X. Methylglyoxal alleviates cadmium toxicity in wheat (Triticum aestivum L). Plant Cell Rep 2017; 36:367-370. [PMID: 27838814 DOI: 10.1007/s00299-016-2070-3] [Citation(s) in RCA: 15] [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: 09/11/2016] [Accepted: 11/02/2016] [Indexed: 05/09/2023]
Abstract
Methylglyoxal alleviates cadmium toxicity in wheat (Triticum aestivum L) by improving plant growth. For a long time, the reactive α, β-carbonyl ketoaldehyde methylglyoxal (CH3COCHO; MG) has been regarded as merely a toxic metabolite in plants, but, now, emerging as a signal molecule in plants. In this study, cadmium (Cd) stress decreased plant height, root length, fresh weight (FW), and dry weight (DW) in a concentration-dependent manner, indicating that Cd had toxic effects on the growth of wheat seedlings. The toxic effects of Cd were alleviated by exogenously applied MG in a dosage dependent fashion, and 700 mM MG reached significant differences, but this alleviating effect was eliminated by the treatment with N-acetyl-L-cysteine (NAC, MG scavenger), suggesting that MG could mitigate Cd toxicity in wheat. This study reported for the first time that MG could alleviate Cd toxicity in wheat, uncovering a new possible physiological function for MG, and opening a novel line of research in plant stress biology.
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Affiliation(s)
- Zhong-Guang Li
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China.
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China.
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, 650092, Yunnan Province, People's Republic of China.
| | - Xiang-Qiu Duan
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, 650092, Yunnan Province, People's Republic of China
| | - Yan-Mei Xia
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, 650092, Yunnan Province, People's Republic of China
| | - Yue Wang
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, 650092, Yunnan Province, People's Republic of China
| | - Zhi-Hao Zhou
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, 650092, Yunnan Province, People's Republic of China
| | - Xiong Min
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, 650092, Yunnan Province, People's Republic of China
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Yamaguchi C, Takimoto Y, Ohkama-Ohtsu N, Hokura A, Shinano T, Nakamura T, Suyama A, Maruyama-Nakashita A. Effects of Cadmium Treatment on the Uptake and Translocation of Sulfate in Arabidopsis thaliana. Plant Cell Physiol 2016; 57:2353-2366. [PMID: 27590710 DOI: 10.1093/pcp/pcw156] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 01/17/2016] [Accepted: 08/29/2016] [Indexed: 05/23/2023]
Abstract
Cadmium (Cd) is a highly toxic and non-essential element for plants, whereas phytochelatins and glutathione are low-molecular-weight sulfur compounds that function as chelators and play important roles in detoxification. Cadmium exposure is known to induce the expression of sulfur-assimilating enzymes and sulfate uptake by roots. However, the molecular mechanism underlying Cd-induced changes remains largely unknown. Accordingly, we analyzed the effects of Cd treatment on the uptake and translocation of sulfate and accumulation of thiols in Arabidopsis thaliana Both wild type (WT) and null mutant (sel1-10 and sel1-18) plants of the sulfate transporter SULTR1;2 exhibited growth inhibition when treated with CdCl2 However, the mutant plants exhibited a lower growth rate and lower Cd accumulation. Cadmium treatment also upregulated the transcription of SULTR1;2 and sulfate uptake activity in WT plants, but not in mutant plants. In addition, the sulfate, phytochelatin and total sulfur contents were preferentially accumulated in the shoots of both WT and mutant plants treated with CdCl2, and sulfur K-edge XANES spectra suggested that sulfate was the main compound responsible for the increased sulfur content in the shoots of CdCl2-treated plants. Our results demonstrate that Cd-induced sulfate uptake depends on SULTR1;2 activity, and that CdCl2 treatment greatly shifts the distribution of sulfate to shoots, increases the sulfate concentration of xylem sap and upregulates the expression of SULTRs involved in root-to-shoot sulfate transport. Therefore, we conclude that root-to-shoot sulfate transport is stimulated by Cd and suggest that the uptake and translocation of sulfate in CdCl2-treated plants are enhanced by demand-driven regulatory networks.
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Affiliation(s)
- Chisato Yamaguchi
- Graduate School of Agricultural Science, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Yuki Takimoto
- Faculty of Bioscience, Fukui Prefectural University, 4-1-1 Kenjojima, Matsuoka, Eiheiji-town, Fukui 910-1195, Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Akiko Hokura
- Department of Green and Sustainable Chemistry School of Engineering, Tokyo Denki University, 5 Senju-Asahicho, Adachi, Tokyo 120-8551, Japan
| | - Takuro Shinano
- NARO Hokkaido Agricultural Research Center, 1 Hitsujigaoka, Toyohira-ku, Sapporo, 062-8555, Japan
- Present address: Agricultural Radiation Research Center, NARO Tohoku Agricultural Research Center, 50 Aza-Harajyukuminami, Arai, Fukushima, 210-2156
| | - Toshiki Nakamura
- Graduate School of Agricultural Science, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Akiko Suyama
- Graduate School of Agricultural Science, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Akiko Maruyama-Nakashita
- Graduate School of Agricultural Science, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
- Faculty of Bioscience, Fukui Prefectural University, 4-1-1 Kenjojima, Matsuoka, Eiheiji-town, Fukui 910-1195, Japan
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Cacciola SO, Puglisi I, Faedda R, Sanzaro V, Pane A, Lo Piero AR, Evoli M, Petrone G. Cadmium induces cadmium-tolerant gene expression in the filamentous fungus Trichoderma harzianum. Mol Biol Rep 2015; 42:1559-70. [PMID: 26349455 DOI: 10.1007/s11033-015-3924-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 09/01/2015] [Indexed: 10/23/2022]
Abstract
The filamentous fungus Trichoderma harzianum, strain IMI 393899, was able to grow in the presence of the heavy metals cadmium and mercury. The main objective of this research was to study the molecular mechanisms underlying the tolerance of the fungus T. harzianum to cadmium. The suppression subtractive hybridization (SSH) method was used for the characterization of the genes of T. harzianum implicated in cadmium tolerance compared with those expressed in the response to the stress induced by mercury. Finally, the effects of cadmium exposure were also validated by measuring the expression levels of the putative genes coding for a glucose transporter, a plasma membrane ATPase, a Cd(2+)/Zn(2+) transporter protein and a two-component system sensor histidine kinase YcbA, by real-time-PCR. By using the aforementioned SSH strategy, it was possible to identify 108 differentially expressed genes of the strain IMI 393899 of T. harzianum grown in a mineral substrate with the addition of cadmium. The expressed sequence tags identified by SSH technique were encoding different genes that may be involved in different biological processes, including those associated to primary and secondary metabolism, intracellular transport, transcription factors, cell defence, signal transduction, DNA metabolism, cell growth and protein synthesis. Finally, the results show that in the mechanism of tolerance to cadmium a possible signal transduction pathway could activate a Cd(2+)/Zn(2+) transporter protein and/or a plasma membrane ATPase that could be involved in the compartmentalization of cadmium inside the cell.
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Wu Q, Su N, Cai J, Shen Z, Cui J. Hydrogen-rich water enhances cadmium tolerance in Chinese cabbage by reducing cadmium uptake and increasing antioxidant capacities. J Plant Physiol 2015; 175:174-82. [PMID: 25543863 DOI: 10.1016/j.jplph.2014.09.017] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 09/25/2014] [Accepted: 09/28/2014] [Indexed: 05/08/2023]
Abstract
The aim of the present paper was to understand the specific mechanism of hydrogen-rich water (HRW) in alleviating cadmium (Cd) toxicity in Chinese cabbage (Brassica campestris spp. chinensis L.). Our results showed that the addition of 50% saturation HRW significantly alleviated the Cd toxic symptoms, including the improvement of both root elongation and seedling growth inhibition. These responses were consistent with a significant decrease of Cd accumulation in roots and shoots, which was further confirmed by the histochemical staining. Molecular evidence illustrated that Cd-induced up-regulations of IRT1 and Nramp1 genes, responsible for Cd absorption, were blocked by HRW. By contrast, Cd-induced up-regulation of the HMA3 gene, which regulates Cd sequestration into the root vacuoles, was substantially strengthened by HRW. Furthermore, compared with those in Cd stress alone, the expressions of HMA2 and HMA4, which function in the transportation of Cd to xylem, were repressed by co-treatment with HRW. HRW enhanced the activities of antioxidant enzymes, including superoxide dismutase, guaiacol peroxidase, catalase and ascorbate peroxidase. These results were further confirmed by the alleviation of oxidative damage, as indicated by the decrease of thiobarbituric acid reactive substances (TBARS) and reactive oxygen species (ROS) production. Taken together, these results suggest that the improvement of Cd tolerance by HRW was associated with reduced Cd uptake and increased antioxidant defense capacities. Therefore, the application of HRW may be a promising strategy to improve Cd tolerance of Chinese cabbage.
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Affiliation(s)
- Qi Wu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiangtao Cai
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Mohammadian Fazli M, Soleimani N, Mehrasbi M, Darabian S, Mohammadi J, Ramazani A. Highly cadmium tolerant fungi: their tolerance and removal potential. J Environ Health Sci Eng 2015; 13:19. [PMID: 25806110 PMCID: PMC4372280 DOI: 10.1186/s40201-015-0176-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 03/03/2015] [Indexed: 05/08/2023]
Abstract
BACKGROUND Soil and effluent of lead and zinc industries contain high concentration of cadmium. The present study was conducted to isolate tolerant fungal strains from cadmium -polluted sites in Zanjan province, Iran. METHODS Cadmium tolerance and bioremediation capacity of seven isolates including Aspergilus versicolor, Aspergillus fumigatus, Paecilomyces sp.9, Paecilomyces sp.G, Terichoderma sp, Microsporum sp,Cladosporium sp were determined. RESULTS Minimum inhibitory concentration values among 1,000-4,000 mg l-(1)proved great ability of isolated strains to survive in cadmium polluted environments. The most tolerant fungi, Aspergilus versicolor, showed tolerance index of 0.8 in 100 mg l-(1) cadmium agar media. Fungal resistance against cadmium is depended directly on strain's biological function. A. versicolor was found to bioaccumulate over7 mg of cadmium per 1 g of mycelium, followed by 5.878, 5.243, and 5.075, 4.557 by Paecilomyces sp, Aspergilus fumigatus, Microsporum sp and Terichoderma sp, respectively. CONCLUSION It can be noted that tolerance of the strains appears to be independent from bioaccumulation capacity. Finally, the results indicated that A. versicolor could be a prospective candidate for bioremediation processes.
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Affiliation(s)
- Mehran Mohammadian Fazli
- />Department of Environmental Health Engineering, Zanjan Universiry of Medical Sciences, Zanjan, Iran
| | - Negin Soleimani
- />Department of Environmental Health Engineering, Zanjan Universiry of Medical Sciences, Zanjan, Iran
| | - Mohammadreza Mehrasbi
- />Department of Environmental Health Engineering, Zanjan Universiry of Medical Sciences, Zanjan, Iran
| | - Sima Darabian
- />Medical Entomology and Mycology Department, School of Medicine, Zanjan Universiry of Medical Sciences, Zanjan, Iran
| | - Jamshid Mohammadi
- />Medical Entomology and Mycology Department, School of Medicine, Zanjan Universiry of Medical Sciences, Zanjan, Iran
| | - Ali Ramazani
- />Biotechnology Departments, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
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Mariem W, Kilani BR, Benet G, Abdelbasset L, Stanley L, Charlotte P, Chedly A, Tahar G. How does NaCl improve tolerance to cadmium in the halophyte Sesuvium portulacastrum? Chemosphere 2014; 117:243-50. [PMID: 25104648 DOI: 10.1016/j.chemosphere.2014.07.041] [Citation(s) in RCA: 21] [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: 04/09/2014] [Revised: 07/14/2014] [Accepted: 07/15/2014] [Indexed: 05/27/2023]
Abstract
Sesuvium portulacastrum is a halophyte with considerable Cd tolerance and accumulation, especially under high salinity. The species seems a good candidate for phytoremediation of Cd-contaminated, saline soils. However, the mechanisms sustaining salt-induced alleviation of Cd toxicity remain unknown. Seedlings of S. portulacastrum were submitted hydroponically to different Cd concentrations (0, 25 and 50 μM Cd) in combination with low (0.09 mM), or high (200 mM) NaCl. Cadmium distribution within leaves and stems was assessed by total Cd, cell sap Cd, and Cd in different cell fractions. In plants with low salt supply (LS) Cd induced severe toxicity. The presence of 200 mM NaCl (HS) significantly alleviated Cd toxicity symptoms. HS drastically reduced both Cd-induced H2O2 production and membrane damage. In HS plants the reduced Cd uptake was only in part responsible for the lower Cd toxicity. Even at equal internal leaf Cd concentrations less Cd toxicity was observed in HS than in LS plants. In HS plants proportionally more Cd was bound in cell walls and proportionally less accumulated in the soluble fraction than in LS plants. Our results show that NaCl improves plant performance under Cd stress by both a decrease of Cd(2+) activity in the medium leading to less Cd uptake and a change of Cd speciation and compartmentation inside tissues. More efficient internal detoxification seems mainly brought about by preferential Cd binding to chloride and cell walls in plants treated with a high salt concentration.
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Affiliation(s)
- Wali Mariem
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia; Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain
| | - Ben Rjab Kilani
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Gunsé Benet
- Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain
| | - Lakdhar Abdelbasset
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Lutts Stanley
- Groupe de Recherche en Physiologie Végétale (GRPV), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Poschenrieder Charlotte
- Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain
| | - Abdelly Chedly
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Ghnaya Tahar
- Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia.
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Dresler S, Bednarek W, Wójcik M. Effect of cadmium on selected physiological and morphological parameters in metallicolous and non-metallicolous populations of Echium vulgare L. Ecotoxicol Environ Saf 2014; 104:332-8. [PMID: 24732029 DOI: 10.1016/j.ecoenv.2014.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 02/18/2014] [Accepted: 03/16/2014] [Indexed: 05/04/2023]
Abstract
Cadmium tolerance of three populations of Echium vulgare L., naturally occurring on two Zn-Pb waste deposits (metallicolous populations M1, M2) and on an uncontaminated site (non-metallicolous population, NM) was investigated. The plants were cultivated in hydroponics at 0, 5, 15, 30, or 50μM Cd for 14 days. Although Cd reduced the content of photosynthetic pigments indifferently in the three populations, plant growth parameters and root viability analyses confirmed different Cd tolerances decreasing in the order M1>M2>NM in the populations studied. Organic acids (tartrate, malate, citrate, succinate) were not responsible for the elevated Cd tolerance of the metallicolous populations, although malate and citrate might participate in Cd detoxification in the roots of the M1 and M2. Phytochelatin concentrations were higher in the roots of M1 and M2 populations of E. vulgare, suggesting their role in Cd detoxification and different Cd tolerances.
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Affiliation(s)
- Sławomir Dresler
- Department of Plant Physiology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland.
| | - Wiesław Bednarek
- Department of Agricultural and Environmental Chemistry, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland.
| | - Małgorzata Wójcik
- Department of Plant Physiology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland.
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