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Amjad M, Iqbal MM, Abbas G, Farooq ABU, Naeem MA, Imran M, Murtaza B, Nadeem M, Jacobsen SE. Assessment of cadmium and lead tolerance potential of quinoa (Chenopodium quinoa Willd) and its implications for phytoremediation and human health. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:1487-1500. [PMID: 33528680 DOI: 10.1007/s10653-021-00826-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Soil contamination with Cd and Pb is a worldwide problem which not only degrades the environment but also poses a serious threat for human and animal health. Phytoremediation of these contaminated soils using halophytic plants like quinoa presents an opportunity to clean the soils and use them for crop production. The current experiment was performed to evaluate the Cd and Pb tolerance potential of quinoa and subsequently its implications for human health. Three weeks old quinoa seedlings were exposed to Cd (30, 60 and 90 mg kg-1) and Pb (50, 100 and 150 mg kg-1) levels along with a control. The results revealed that plant height decreased at highest levels of soil Cd and Pb. Shoot, root and seed dry weight decreased with increasing levels of soil Cd and Pb. Tissue Cd and Pb concentrations increased with increasing levels of Cd and Pb in soil, the highest Cd was found in roots while the lowest in seeds. The highest Pb concentration was found in shoots at low Pb level, while in roots at high level of Pb. Increasing levels of Cd and Pb stimulated the activities of measured antioxidant enzymes and decreased membrane stability index. The health risk assessments of Cd and Pb revealed that hazard quotient was < 1 for both the metals. However, the results of total hazard quotient showed that value was < 1 for Pb and 1.19 for Cd showing potential carcinogenicity. This study demonstrates that quinoa has good phytoremediation potential for Cd and Pb however, the risk of Cd toxicity is challenging for human health.
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Affiliation(s)
- Muhammad Amjad
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan.
| | - Muhammad Mohsin Iqbal
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Ghulam Abbas
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Abu Bakar Umer Farooq
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Muhammad Asif Naeem
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Muhammad Imran
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Behzad Murtaza
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Muhammad Nadeem
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehar, Pakistan
| | - Sven-Erik Jacobsen
- Department of Plant and Environmental Sciences, University of Copenhagen, Quinoa Quality, Teglvaerksvej 10, 4420, Regstrup, Denmark
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Zhang ZW, Deng ZL, Tao Q, Peng HQ, Wu F, Fu YF, Yang XY, Xu PZ, Li Y, Wang CQ, Chen YE, Yuan M, Lan T, Tang XY, Chen GD, Zeng J, Yuan S. Salicylate and glutamate mediate different Cd accumulation and tolerance between Brassica napus and B. juncea. CHEMOSPHERE 2022; 292:133466. [PMID: 34973246 DOI: 10.1016/j.chemosphere.2021.133466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/22/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Most hyperaccumulator plants have little economic values, and therefore have not been widely used in Cd-contaminated soils. Rape species are Cd hyperaccumulators with high economic values. Black mustard seed (Brassica juncea) has a higher accumulation ability and a higher tolerance for Cd than oilseed rape (Brassica napus), but its biomass is relatively low and its geographical distribution is limited. However, it is unknown why B. juncea (Bj) is more tolerant to and accumulates more Cd than B. napus (Bn). Here, we found that the differences in Cd accumulation and tolerance between the two species is mainly because Bj plants have higher levels of salicylic acid and glutamic acid than Bn plants. Exogenous salicylate and glutamate treatments enhanced Cd accumulation (salicylate + glutamate co-treatment doubled Cd accumulation level in Bn seedlings) but reduced oxidative stresses by increasing glutathione biosynthesis and activating phytochelatin-based sequestration of Cd into vacuoles. Our results provide a new idea to simultaneously improve Cd accumulation and Cd tolerance in B. napus.
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Affiliation(s)
- Zhong-Wei Zhang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zong-Lin Deng
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qi Tao
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Hong-Qian Peng
- Agriculture and Rural Affairs Committee of Shapingba District, Chongqing, 400030, China
| | - Fan Wu
- Sichuan Provincial Academy of Natural Resource Sciences, Chengdu, 610015, China
| | - Yu-Fan Fu
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xin-Yue Yang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Pei-Zhou Xu
- Rice Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yun Li
- Rape Research Institute, Chengdu Academy of Agriculture and Forestry, Chengdu, Sichuan, 611130, China
| | - Chang-Quan Wang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yang-Er Chen
- College of Life Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Ming Yuan
- College of Life Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Ting Lan
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiao-Yan Tang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guang-Deng Chen
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jian Zeng
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shu Yuan
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China.
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53
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Jiang N, Li Z, Yang J, Zu Y. Responses of antioxidant enzymes and key resistant substances in perennial ryegrass (Lolium perenne L.) to cadmium and arsenic stresses. BMC PLANT BIOLOGY 2022; 22:145. [PMID: 35337264 PMCID: PMC8957149 DOI: 10.1186/s12870-022-03475-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/09/2022] [Indexed: 05/25/2023]
Abstract
Cadmium (Cd) and arsenic (As) exist simultaneously in soil environment, which poses a serious threat to the safety of agricultural products and forage production. Four Perennial Ryegrass (Lolium perenne L.) cultivars with different accumulation characteristics ('Nicaragua', 'Venus', 'Excellent' and 'Monro') were selected as the material for pot experiment. The coupled responses of key components and related enzyme activities under combined stresses of Cd and As were investigated. key components contents include Non protein sulfhydryl (NPT), glutathione (GSH) and phytochelatins (PCs). The related enzyme includes (superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), γ-glutamylcysteine synthetase (γ-ECS), glutathione synthetase (GSS), phytochelatin synthetases (PCSase) and arsenate reductase (AR). The results showed that Cd contents of perennial ryegrass were higher than those of As contents with TFCd/As < 1. Cd and As contents in roots were in the higher proportion than those in shoots. Compared to control, POD activities increased by 2.72 folds under 120 mg kg-1 As treatment. The contents of PCs increased by 5.68 folds under 120 mg kg-1 As treatment. Under combined Cd and As stress, the MDA contents and antioxidant enzyme activities of 'Venus' were higher than those of 'Nicaragua'. 'Nicaragua', a high accumulation cultivar. Under the combined stresses of Cd and As, the enzyme activities and the key components were significantly correlated (P < 0.05) with the contents of Cd and As. The tolerance to Cd and As was improved with increase in GSH and PCs contents and γ-ECS, GSS, PCSase and AR activities. In conclusion, the antioxidant enzyme system and key resistant substances of perennial ryegrass have important and antagonistic effects on Cd and As stresses.
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Affiliation(s)
- Na Jiang
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201, Kunming, China
- College of Resources and Environment, Yunnan Agricultural University, 650201, Kunming, China
| | - Zuran Li
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming, 650201, China.
| | - Jingmin Yang
- College of Resources and Environment, Yunnan Agricultural University, 650201, Kunming, China
| | - Yanqun Zu
- College of Resources and Environment, Yunnan Agricultural University, 650201, Kunming, China.
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54
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Lin K, Williams DV, Zeng M, Ahmed IM, Dai H, Cao F, Wu F. Identification of low grain cadmium accumulation genotypes and its physiological mechanism in maize (Zea mays L.). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:20721-20730. [PMID: 34741735 DOI: 10.1007/s11356-021-16991-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
Soil cadmium (Cd) contamination poses adverse impacts on crop yield and quality. Maize is a widely cultivated cereal throughout the world. In this study, field and hydroponic experiments were conducted to investigate the genotypic difference in Cd accumulation and tolerance in maize. There were significant genotypic differences in grain Cd concentrations among 95 genotypes. From these 95 genotypes, L42 which showed a higher grain Cd concentration and L63 which showed a lower grain Cd concentration was selected for further study. Under Cd stress, L63 showed much less reduction in plant growth than L42 compared with the control. Seedlings of L63 recorded higher Cd concentration in roots, but lower in shoots L42, indicating that the low grain Cd concentration in L63 is mainly due to the low rate of transportation of Cd from roots to shoots. Most Cd accumulated in epidermis and xylem vessels of L63, while the green fluorescent was found across almost the entire cross-section of root in L42. Obvious ultrastructural damage was observed in L42 under Cd stress, especially in mesophyll cells, while L63 was less affected. These findings could contribute to developing low Cd accumulation and high tolerance maize cultivars.
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Affiliation(s)
- Kaina Lin
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, People's Republic of China
| | - Darron V Williams
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, People's Republic of China
| | - Meng Zeng
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, People's Republic of China
| | - Imrul Mosaddek Ahmed
- Plant Physiology Division, Bangladesh Agricultural Research Institute, Gazipur, 1701, Bangladesh
| | - Huaxin Dai
- Key Laboratory of Eco-Environment & Tobacco Leaf Quality, CNTC, Zhengzhou, 450001, People's Republic of China.
| | - Fangbin Cao
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, People's Republic of China.
| | - Feibo Wu
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, People's Republic of China
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55
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Podar D, Maathuis FJM. The role of roots and rhizosphere in providing tolerance to toxic metals and metalloids. PLANT, CELL & ENVIRONMENT 2022; 45:719-736. [PMID: 34622470 DOI: 10.1111/pce.14188] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/23/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
Human activity and natural processes have led to the widespread dissemination of metals and metalloids, many of which are toxic and have a negative impact on plant growth and development. Roots, as the first point of contact, are essential in endowing plants with tolerance to excess metal(loid) in the soil. The most important root processes that contribute to tolerance are: adaptation of transport processes that affect uptake efflux and long-distance transport of metal(loid)s; metal(loid) detoxification within root cells via conjugation to thiol rich compounds and subsequent sequestration in the vacuole; plasticity in root architecture; the presence of bacteria and fungi in the rhizosphere that impact on metal(loid) bioavailability; the role of root exudates. In this review, we provide details on these processes and assess their relevance on the detoxification of arsenic, cadmium, mercury and zinc in crops. Furthermore, we assess which of these strategies have been tested in field conditions and whether they are effective in terms of improving crop metal(loid) tolerance.
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Affiliation(s)
- Dorina Podar
- Department of Molecular Biology and Biotechnology, Faculty of Biology-Geology, Babeș-Bolyai University, Cluj, Romania
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56
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Yan H, Xu W, Zhang T, Feng L, Liu R, Wang L, Wu L, Zhang H, Zhang X, Li T, Peng Z, Jin C, Yu Y, Ping J, Ma M, He Z. Characterization of a novel arsenite long-distance transporter from arsenic hyperaccumulator fern Pteris vittata. THE NEW PHYTOLOGIST 2022; 233:2488-2502. [PMID: 35015902 DOI: 10.1111/nph.17962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
Pteris vittata is an arsenic (As) hyperaccumulator that can accumulate several thousand mg As kg-1 DW in aboveground biomass. A key factor for its hyperaccumulation ability is its highly efficient As long-distance translocation system. However, the underlying molecular mechanisms remain unknown. We isolated PvAsE1 through the full-length cDNA over-expression library of P. vittata and characterized it through a yeast system, RNAi gametophytes and sporophytes, subcellular-location and in situ hybridization. Phylogenomic analysis was conducted to estimate the appearance time of PvAsE1. PvAsE1 was a plasma membrane-oriented arsenite (AsIII) effluxer. The silencing of PvAsE1 reduced AsIII long-distance translocation in P. vittata sporophytes. PvAsE1 was structurally similar to solute carrier (SLC)13 proteins. Its transcripts could be observed in parenchyma cells surrounding the xylem of roots. The appearance time was estimated at c. 52.7 Ma. PvAsE1 was a previously uncharacterized SLC13-like AsIII effluxer, which may contribute to AsIII long-distance translocation via xylem loading. PvAsE1 appeared late in fern evolution and might be an adaptive subject to the selection pressure at the Cretaceaou-Paleogene boundary. The identification of PvAsE1 provides clues for revealing the special As hyperaccumulation characteristics of P. vittata.
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Affiliation(s)
- Huili Yan
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Wenxiu Xu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Tian Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lu Feng
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Ruoxi Liu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Luyao Wang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lulu Wu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Han Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaohan Zhang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Ting Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhimei Peng
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chen Jin
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Yijun Yu
- Zhejiang Station for Management of Arable Land Quality and Fertilizer, Hangzhou, 310020, China
| | - Junai Ping
- Sorghum Research Institute of Shanxi Agricultural University, Jinzhong, 030600, China
| | - Mi Ma
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Zhenyan He
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
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57
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Meng Y, Zhang L, Yao ZL, Ren YB, Wang LQ, Ou XB. Arsenic Accumulation and Physiological Response of Three Leafy Vegetable Varieties to As Stress. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:2501. [PMID: 35270194 PMCID: PMC8909813 DOI: 10.3390/ijerph19052501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/18/2022] [Accepted: 02/18/2022] [Indexed: 12/10/2022]
Abstract
Arsenic (As) in leafy vegetables may harm humans. Herein, we assessed As accumulation in leafy vegetables and the associated physiological resistance mechanisms using soil pot and hydroponic experiments. Garland chrysanthemum (Chrysanthemum coronarium L.), spinach (Spinacia oleracea L.), and lettuce (Lactuca sativa L.) were tested, and the soil As safety threshold values of the tested leafy vegetables were 91.7, 76.2, and 80.7 mg kg−1, respectively, i.e., higher than the soil environmental quality standard of China. According to growth indicators and oxidative stress markers (malondialdehyde, the ratio of reduced glutathione to oxidized glutathione, and soluble protein), the order of As tolerance was: GC > SP > LE. The high tolerance of GC was due to the low transport factor of As from the roots to the shoots; the high activity of superoxide dismutase, glutathione peroxidase, and catalase; and the high content of phytochelatin in the roots. Results of this work shed light on the use of As-contaminated soils and plant tolerance of As stress.
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Affiliation(s)
- Yuan Meng
- College of Agriculture and Forestry, Longdong University, Qingyang 745000, China; (L.Z.); (Z.-L.Y.); (Y.-B.R.)
| | - Liang Zhang
- College of Agriculture and Forestry, Longdong University, Qingyang 745000, China; (L.Z.); (Z.-L.Y.); (Y.-B.R.)
- Gansu Key Laboratory of Protection and Utilization for Biological Resources and Ecological Restoration, Qingyang 745000, China;
| | - Zhi-Long Yao
- College of Agriculture and Forestry, Longdong University, Qingyang 745000, China; (L.Z.); (Z.-L.Y.); (Y.-B.R.)
| | - Yi-Bin Ren
- College of Agriculture and Forestry, Longdong University, Qingyang 745000, China; (L.Z.); (Z.-L.Y.); (Y.-B.R.)
| | - Lin-Quan Wang
- College of Resources and Environment, Northwest A&F University, Xiangyang 712100, China;
| | - Xiao-Bin Ou
- Gansu Key Laboratory of Protection and Utilization for Biological Resources and Ecological Restoration, Qingyang 745000, China;
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58
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Meng X, Li W, Shen R, Lan P. Ectopic expression of IMA small peptide genes confers tolerance to cadmium stress in Arabidopsis through activating the iron deficiency response. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126913. [PMID: 34419841 DOI: 10.1016/j.jhazmat.2021.126913] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/23/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Increasing cadmium (Cd) pollution severely affects plant growth and development, posing risks to human health via food chains. The Cd toxicity could be mitigated by improving Fe nutrient in plants. IMA1 and IMA3, two novel small peptides functionally epistatic to the key transcription factor bHLH39 but independent of bHLH104, were recently identified as the newest additions to the Fe regulatory cascade, but their roles in Cd uptake and toxicity remain not addressed. Here, the functions of two IMAs and two transcription factors related to Cd tolerance were verified. Overexpression of either bHLH39 or bHLH104 in Arabidopsis showed weak roles in Cd tolerance, but overexpression of IMAs, which activates the Fe-deficient response, significantly enhanced Cd tolerance, showing greater root elongation, biomass and chlorophyll contents. The Cd contents did not show significant difference among the overexpression lines. Further investigations revealed that the tolerance of transgenic plants to Cd mainly depended on higher Fe accumulation, which decreased the MDA contents and enhanced root elongation under Cd exposure, finally contributing to attenuating Cd toxicity. Taken together, the results suggest that increasing Fe accumulation is promising for improving plant tolerance to Cd toxicity and that IMAs are potential candidates for solving Cd toxicity problem.
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Affiliation(s)
- Xiangxiang Meng
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenfeng Li
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
| | - Renfang Shen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Ping Lan
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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59
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Li H, Gao MY, Mo CH, Wong MH, Chen XW, Wang JJ. Potential use of arbuscular mycorrhizal fungi for simultaneous mitigation of arsenic and cadmium accumulation in rice. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:50-67. [PMID: 34610119 DOI: 10.1093/jxb/erab444] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Rice polluted by metal(loid)s, especially arsenic (As) and cadmium (Cd), imposes serious health risks. Numerous studies have demonstrated that the obligate plant symbionts arbuscular mycorrhizal fungi (AMF) can reduce As and Cd concentrations in rice. The behaviours of metal(loid)s in the soil-rice-AMF system are of significant interest for scientists in the fields of plant biology, microbiology, agriculture, and environmental science. We review the mechanisms of As and Cd accumulation in rice with and without the involvement of AMF. In the context of the soil-rice-AMF system, we assess and discuss the role of AMF in affecting soil ion mobility, chemical forms, transport pathways (including the symplast and apoplast), and genotype variation. A potential strategy for AMF application in rice fields is considered, followed by future research directions to improve theoretical understanding and encourage field application.
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Affiliation(s)
- Hui Li
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Meng Ying Gao
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce Hui Mo
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ming Hung Wong
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Consortium on Health, Environment, Education and Research (CHEER), The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Xun Wen Chen
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jun-Jian Wang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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60
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McInturf SA, Khan MA, Gokul A, Castro-Guerrero NA, Höhner R, Li J, Marjault HB, Fichman Y, Kunz HH, Goggin FL, Keyster M, Nechushtai R, Mittler R, Mendoza-Cózatl DG. Cadmium interference with iron sensing reveals transcriptional programs sensitive and insensitive to reactive oxygen species. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:324-338. [PMID: 34499172 DOI: 10.1093/jxb/erab393] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
Iron (Fe) is an essential micronutrient whose uptake is tightly regulated to prevent either deficiency or toxicity. Cadmium (Cd) is a non-essential element that induces both Fe deficiency and toxicity; however, the mechanisms behind these Fe/Cd-induced responses are still elusive. Here we explored Cd- and Fe-associated responses in wild-type Arabidopsis and in a mutant that overaccumulates Fe (opt3-2). Gene expression profiling revealed a large overlap between transcripts induced by Fe deficiency and Cd exposure. Interestingly, the use of opt3-2 allowed us to identify additional gene clusters originally induced by Cd in the wild type but repressed in the opt3-2 background. Based on the high levels of H2O2 found in opt3-2, we propose a model where reactive oxygen species prevent the induction of genes that are induced in the wild type by either Fe deficiency or Cd. Interestingly, a defined cluster of Fe-responsive genes was found to be insensitive to this negative feedback, suggesting that their induction by Cd is more likely to be the result of an impaired Fe sensing. Overall, our data suggest that Fe deficiency responses are governed by multiple inputs and that a hierarchical regulation of Fe homeostasis prevents the induction of specific networks when Fe and H2O2 levels are elevated.
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Affiliation(s)
- Samuel A McInturf
- Division of Plant Sciences, C.S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Mather A Khan
- Division of Plant Sciences, C.S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Arun Gokul
- Environmental Biotechnology Laboratory, Department of Biotechnology, University of the Western Cape, Bellville, Cape Town, 7535, South Africa
| | - Norma A Castro-Guerrero
- Division of Plant Sciences, C.S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Ricarda Höhner
- School of Biological Sciences, Washington State University, PO Box 644236, Pullman, WA 99164-4236, USA
| | - Jiamei Li
- Department of Entomology and Plant Pathology, 217 Plant Sciences Building, University of Arkansas System Division of Agriculture, Fayetteville, AR 72701, USA
| | | | - Yosef Fichman
- Division of Plant Sciences, C.S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Hans-Henning Kunz
- School of Biological Sciences, Washington State University, PO Box 644236, Pullman, WA 99164-4236, USA
- Biozentrum der LMU München, Germany
| | - Fiona L Goggin
- Department of Entomology and Plant Pathology, 217 Plant Sciences Building, University of Arkansas System Division of Agriculture, Fayetteville, AR 72701, USA
| | - Marshall Keyster
- Environmental Biotechnology Laboratory, Department of Biotechnology, University of the Western Cape, Bellville, Cape Town, 7535, South Africa
| | - Rachel Nechushtai
- Institute of Life Science, The Hebrew University of Jerusalem, Jerusalem, 91904Israel
| | - Ron Mittler
- Division of Plant Sciences, C.S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - David G Mendoza-Cózatl
- Division of Plant Sciences, C.S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
- Environmental Biotechnology Laboratory, Department of Biotechnology, University of the Western Cape, Bellville, Cape Town, 7535, South Africa
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61
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Sun T, Hu Y, Wang Z, Xia W, Lv Q, Wang Y, Fang P, Xu P. A tissue atlas of cadmium accumulation and the correlation with thiol-containing chelates in zucchini provide insights into cadmium partitioning and food safety. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126756. [PMID: 34352523 DOI: 10.1016/j.jhazmat.2021.126756] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/15/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Widespread heavy metal pollution in soils has posed serious threat to vegetable production and food security, yet little is still known about heavy metal accumulation and distribution in the majority of vegetable crops. Here, we report the generation of a tissue atlas of cadmium accumulation in zucchini (Cucurbita pepo var. Giromontial), a globally important cucurbit crop, based on two-season experiment with six genotypes grown under cadmium contaminated soils. Plant growth and development as manifested by biomass, flowering time and plant architecture were unaffected by 10 mg/kg cadmium treatment, but high level of cadmium enrichment was detected in all genotypes. Roots accumulated the largest amount of cadmium, whereas the cadmium concentrations in fruits was also considerable. The exocarps of fruits possessed nearly half of the total cadmium in fruits, rendering it a "hotspot" of safety risk. Measurement of the thiol-containing chelates revealed that concentration of GSH but not PCs was correlated with the cadmium concentration in subdivided fruit tissues, suggesting a mechanism of phloem-specific transportation of cadmium in the form of Cd-GSH. Based on the collective data, a tentative model describing the relationship between long-distance phloem transport and cadmium distribution in sink organs is proposed. The implications for food safety are discussed.
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Affiliation(s)
- Ting Sun
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Yannan Hu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Zhuoyi Wang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Wenjun Xia
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Qiaoqiao Lv
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Yonggang Wang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Pingping Fang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Pei Xu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China.
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62
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Phytoremediation of Cadmium Polluted Soils: Current Status and Approaches for Enhancing. SOIL SYSTEMS 2022. [DOI: 10.3390/soilsystems6010003] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cadmium (Cd) is a heavy metal present in atmosphere, rocks, sediments, and soils without a known role in plants. It is relatively mobile and can easily enter from soil into groundwater and contaminate the food chain. Its presence in food in excess amounts may cause severe conditions in humans, therefore prevention of cadmium entering the food chain and its removal from contaminated soils are important steps in preserving public health. In the last several years, several approaches for Cd remediation have been proposed, such as the use of soil amendments or biological systems for reduction of Cd contamination. One of the approaches is phytoremediation, which involves the use of plants for soil clean-up. In this review we summarized current data on the use of different plants in phytoremediation of Cd as well as information about different approaches which have been used to enhance phytoremediation. This includes data on the increasing metal bioavailability in the soil, plant biomass, and plant accumulation capacity as well as seed priming as a promising novel approach for phytoremediation enhancing.
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63
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Hui CY, Guo Y, Liu L, Yi J. Recent advances in bacterial biosensing and bioremediation of cadmium pollution: a mini-review. World J Microbiol Biotechnol 2021; 38:9. [PMID: 34850291 DOI: 10.1007/s11274-021-03198-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 11/23/2021] [Indexed: 12/27/2022]
Abstract
Cadmium (Cd) pollution has become a global environmental issue because Cd gets easily accumulated and translocated in the food chain, threatening human health. Considering the detrimental effects and non-biodegradability of environmental Cd, this is an urgent issue that needs to be addressed through the development of robust, cost-effective, and eco-friendly green routes for monitoring and remediating toxic levels of Cd. This article attempts to review various bacterial approaches toward biosensing and bioremediation of Cd in the environment. This review focuses on the recent development of bacterial cell-based biosensors for the detection of bioavailable Cd and the bioremediation of toxic Cd by natural or genetically-engineered bacteria. The present limitations and future perspectives of these available bacterial approaches are outlined. New trends for integrating synthetic biology and metabolic engineering into the design of bacterial biosensors and bioadsorbers are additionally highlighted.
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Affiliation(s)
- Chang-Ye Hui
- Department of Pathology & Toxicology, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China.
| | - Yan Guo
- National Key Clinical Specialty of Occupational Diseases, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China
| | - Lisa Liu
- Lewis Katz School of Medicine, Temple University, Pennsylvania, USA
| | - Juan Yi
- Department of Pathology & Toxicology, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China
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64
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Seregin IV, Kozhevnikova AD. Low-molecular-weight ligands in plants: role in metal homeostasis and hyperaccumulation. PHOTOSYNTHESIS RESEARCH 2021; 150:51-96. [PMID: 32653983 DOI: 10.1007/s11120-020-00768-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
Mineral nutrition is one of the key factors determining plant productivity. In plants, metal homeostasis is achieved through the functioning of a complex system governing metal uptake, translocation, distribution, and sequestration, leading to the maintenance of a regulated delivery of micronutrients to metal-requiring processes as well as detoxification of excess or non-essential metals. Low-molecular-weight ligands, such as nicotianamine, histidine, phytochelatins, phytosiderophores, and organic acids, play an important role in metal transport and detoxification in plants. Nicotianamine and histidine are also involved in metal hyperaccumulation, which determines the ability of some plant species to accumulate a large amount of metals in their shoots. In this review we extensively summarize and discuss the current knowledge of the main pathways for the biosynthesis of these ligands, their involvement in metal uptake, radial and long-distance transport, as well as metal influx, isolation and sequestration in plant tissues and cell compartments. It is analyzed how diverse endogenous ligand levels in plants can determine their different tolerance to metal toxic effects. This review focuses on recent advances in understanding the physiological role of these compounds in metal homeostasis, which is an essential task of modern ionomics and plant physiology. It is of key importance in studying the influence of metal deficiency or excess on various physiological processes, which is a prerequisite to the improvement of micronutrient uptake efficiency and crop productivity and to the development of a variety of applications in phytoremediation, phytomining, biofortification, and nutritional crop safety.
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Affiliation(s)
- I V Seregin
- K.A. Timiryazev Institute of Plant Physiology RAS, IPPRAS, Botanicheskaya st., 35, Moscow, Russian Federation, 127276.
| | - A D Kozhevnikova
- K.A. Timiryazev Institute of Plant Physiology RAS, IPPRAS, Botanicheskaya st., 35, Moscow, Russian Federation, 127276
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65
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He F, Zhao Q, Huang JL, Niu MX, Feng HC, Shi YJ, Zhao KJ, Cui XL, Wu XL, Mi JX, Zhong Y, Liu QL, Chen LH, Wan XQ, Zhang F. External application of nitrogen alleviates toxicity of cadmium on poplars via starch and sucrose metabolism. TREE PHYSIOLOGY 2021; 41:2126-2141. [PMID: 33960381 DOI: 10.1093/treephys/tpab065] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/30/2021] [Accepted: 04/28/2021] [Indexed: 05/28/2023]
Abstract
Phytoremediation technology can help achieve moderate cost and considerable effect with respect to the remediation of heavy metal (HM) pollution in soil and water. Many previous studies have suggested the role of nitrogen (N) in the alleviation of effects of HM on plants. Herein, we sought to determine the molecular mechanisms by which additional N supplementation mitigates cadmium (Cd) toxicity in poplars using a combination of physiological, transcriptomic and phosphoproteomic analyses. The application of N can alleviate the toxicity of Cd to Populus by reducing chlorophyll degradation, maintaining the stability of ions inside and outside the cell membrane and increasing the soluble sugar content. Plant samples from the control, Cd stress and Cd_N treatments were used for an integrated analysis of the transcriptome, as well as for phosphoproteomics analysis. Moreover, 1314 differentially expressed genes and 119 differentially expressed kinase genes were discovered. Application of additional N under Cd stress promoted the phosphorylation process. Furthermore, 51 significantly enriched phosphorylated protein sites and 23 differentially expressed kinases were identified using phosphoproteomic and proteomic analyses. Importantly, transcriptomic and phosphoproteomic analyses jointly determined that the application of N could activate corresponding gene expression [UDP-glucose-dehydrogenase (UGD), GAUT, PME, pectin lyase, UDP-glucose-pyrophosphorylase 2 (UGP2), sucrose phosphate synthase (SPS), SUS and SPP2] and protein phosphorylation (UGP2 and SPS) in the sugar and starch synthesis pathways, which promoted the synthesis of sucrose and soluble sugar and subsequently alleviated the damage caused by Cd.
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Affiliation(s)
- Fang He
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Qian Zhao
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Jin-Liang Huang
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Meng-Xue Niu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Hua-Cong Feng
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Yu-Jie Shi
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Kuang-Ji Zhao
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xing-Lei Cui
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xiao-Lu Wu
- College of Landscape Architecture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Jia-Xuan Mi
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Yu Zhong
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Qing-Lin Liu
- College of Landscape Architecture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Liang-Hua Chen
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xue-Qin Wan
- Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Fan Zhang
- College of Landscape Architecture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, China
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66
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Molina L, Segura A. Biochemical and Metabolic Plant Responses toward Polycyclic Aromatic Hydrocarbons and Heavy Metals Present in Atmospheric Pollution. PLANTS (BASEL, SWITZERLAND) 2021; 10:2305. [PMID: 34834668 PMCID: PMC8622723 DOI: 10.3390/plants10112305] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/18/2021] [Accepted: 10/23/2021] [Indexed: 05/17/2023]
Abstract
Heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) are toxic components of atmospheric particles. These pollutants induce a wide variety of responses in plants, leading to tolerance or toxicity. Their effects on plants depend on many different environmental conditions, not only the type and concentration of contaminant, temperature or soil pH, but also on the physiological or genetic status of the plant. The main detoxification process in plants is the accumulation of the contaminant in vacuoles or cell walls. PAHs are normally transformed by enzymatic plant machinery prior to conjugation and immobilization; heavy metals are frequently chelated by some molecules, with glutathione, phytochelatins and metallothioneins being the main players in heavy metal detoxification. Besides these detoxification mechanisms, the presence of contaminants leads to the production of the reactive oxygen species (ROS) and the dynamic of ROS production and detoxification renders different outcomes in different scenarios, from cellular death to the induction of stress resistances. ROS responses have been extensively studied; the complexity of the ROS response and the subsequent cascade of effects on phytohormones and metabolic changes, which depend on local concentrations in different organelles and on the lifetime of each ROS species, allow the plant to modulate its responses to different environmental clues. Basic knowledge of plant responses toward pollutants is key to improving phytoremediation technologies.
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Affiliation(s)
- Lázaro Molina
- Department of Environmental Protection, Estación Experimental del Zaidín, C.S.I.C., Calle Profesor Albareda 1, 18008 Granada, Spain;
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Huang WX, Chen XW, Wu L, Yu ZS, Gao MY, Zhao HM, Mo CH, Li YW, Cai QY, Wong MH, Li H. Root cell wall chemistry remodelling enhanced arsenic fixation of a cabbage cultivar. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126165. [PMID: 34273883 DOI: 10.1016/j.jhazmat.2021.126165] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 04/20/2021] [Accepted: 05/17/2021] [Indexed: 05/27/2023]
Abstract
The low- and high-arsenic (As) transferring cultivars (LTC and HTC) of cabbage showed significant differences in As uptake and distribution. We hypothesise that chemistry of root cell wall matrix plays a critical role. LTC and HTC were treated with As and grown for 60 days. As concentration and distribution at subcellular and cell wall component (pectin, hemicellulose and lignin) levels were determined. Remodelling enzymes (PME and PAL) and functional groups of cell wall were analysed. Results showed that shoot biomass of LTC was not affected by As. Less As was accumulated in shoot of LTC than HTC. LTC allocated more As in root and majority of As was deposited in cell wall. LTC had more hemicellulose 1 (HC1) and lignin, PME and PAL activities. The uronic acid contents of pectin, HC1 or HC2 were all positively (P < 0.05) correlated with As concentrations in each component, respectively. Chemistry of LTC root cell wall was remodelled in terms of changes in porosity, HC and lignin contents, and functional groups, which potentially exerted coupling effects on As entering and deposition. The LTC can restrain As in roots through changing characteristics of root cell wall matrix.
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Affiliation(s)
- Wei Xiong Huang
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Xun Wen Chen
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Li Wu
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Zheng Sheng Yu
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Meng Ying Gao
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hai Ming Zhao
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce Hui Mo
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yan Wen Li
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Quan Ying Cai
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ming Hung Wong
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Hui Li
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
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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. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 285:117218. [PMID: 33933876 DOI: 10.1016/j.envpol.2021.117218] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [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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Gao MY, Chen XW, Huang WX, Wu L, Yu ZS, Xiang L, Mo CH, Li YW, Cai QY, Wong MH, Li H. Cell wall modification induced by an arbuscular mycorrhizal fungus enhanced cadmium fixation in rice root. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125894. [PMID: 34492832 DOI: 10.1016/j.jhazmat.2021.125894] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/30/2021] [Accepted: 04/10/2021] [Indexed: 06/13/2023]
Abstract
The chemistry of root cell wall of rice could be changed by inoculation of arbuscular mycorrhizal fungi (AMF). Hydroponic experiments were conducted to investigate the roles of such changes on cadmium (Cd) uptake and distribution in rice. Results showed that inoculation of AM fungus Rhizophagus intraradices (RI) significantly enhanced (p < 0.05) shoot biomass, plant height and root length of rice, and decreased Cd concentration in shoot and root under Cd stress. Moreover, Cd in root was mainly found in pectin and hemicellulose 1 (HC1) components of root cell wall. Inoculation of RI increased the levels of pectin, HC1 and lignin content, accompanied by the increments of L-phenylalanine ammonia-lyase (PAL) and pectin methylesterase (PME) activities. Results of Fourier transform infrared spectroscopy further showed that more hydroxyl and carboxyl groups in root cell wall were observed in mycorrhizal treatment, compared with control. This study demonstrates that cell wall components could be the locations for Cd fixation, which reduced Cd transportation from root to shoot. Inoculation of AMF may remodel root cell wall biosynthesis and affect the characteristics of Cd fixation. The entering and fixing mechanisms should be further studied.
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Affiliation(s)
- Meng Ying Gao
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Xun Wen Chen
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; State Environmental Protection Key Laboratory of Integrated Surface Water Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Wei Xiong Huang
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Li Wu
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Zheng Sheng Yu
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Lei Xiang
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce Hui Mo
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yan Wen Li
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Quan Ying Cai
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ming Hung Wong
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Hui Li
- Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
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Tibbett M, Green I, Rate A, De Oliveira VH, Whitaker J. The transfer of trace metals in the soil-plant-arthropod system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 779:146260. [PMID: 33744587 DOI: 10.1016/j.scitotenv.2021.146260] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 02/26/2021] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
Essential and non-essential trace metals are capable of causing toxicity to organisms above a threshold concentration. Extensive research has assessed the behaviour of trace metals in biological and ecological systems, but has typically focused on single organisms within a trophic level and not on multi-trophic transfer through terrestrial food chains. This reinforces the notion of metal toxicity as a closed system, failing to consider one trophic level as a pollution source to another; therefore, obscuring the full extent of ecosystem effects. Given the relatively few studies on trophic transfer of metals, this review has taken a compartment-based approach, where transfer of metals through trophic pathways is considered as a series of linked compartments (soil-plant-arthropod herbivore-arthropod predator). In particular, we consider the mechanisms by which trace metals are taken up by organisms, the forms and transformations that can occur within the organism and the consequences for trace metal availability to the next trophic level. The review focuses on four of the most prevalent metal cations in soil which are labile in terrestrial food chains: Cd, Cu, Zn and Ni. Current knowledge of the processes and mechanisms by which these metals are transformed and moved within and between trophic levels in the soil-plant-arthropod system are evaluated. We demonstrate that the key factors controlling the transfer of trace metals through the soil-plant-arthropod system are the form and location in which the metal occurs in the lower trophic level and the physiological mechanisms of each organism in regulating uptake, transformation, detoxification and transfer. The magnitude of transfer varies considerably depending on the trace metal concerned, as does its toxicity, and we conclude that biomagnification is not a general property of plant-arthropod and arthropod-arthropod systems. To deliver a more holistic assessment of ecosystem toxicity, integrated studies across ecosystem compartments are needed to identify critical pathways that can result in secondary toxicity across terrestrial food-chains.
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Affiliation(s)
- Mark Tibbett
- Department of Sustainable Land Management & Soil Research Centre, School of Agriculture Policy and Development, University of Reading, Whiteknights, RG6 6AR, UK.
| | - Iain Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset BH12 5BB, UK
| | - Andrew Rate
- School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Vinícius H De Oliveira
- Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Sao Paulo 13083-970, Brazil
| | - Jeanette Whitaker
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Lancaster LA1 4AP, UK
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Wang L, Zhang Q, Liao X, Li X, Zheng S, Zhao F. Phytoexclusion of heavy metals using low heavy metal accumulating cultivars: A green technology. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125427. [PMID: 33609878 DOI: 10.1016/j.jhazmat.2021.125427] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 06/12/2023]
Abstract
Heavy metal (HM) pollution of farmland is a serious problem worldwide and consumption of HM-contaminated food products poses significant public health risks. Phytoexclusion using low HM accumulating cultivars (LACs) is a promising and practical technology to mitigate the risk of HM contamination of agricultural products grown in polluted soils, and does not alter cultivation practices, is easy to apply, and is economical. This review provides an overview of the major scientific advances accomplished in the field of LACs worldwide. The LACs concept and identification criteria are presented, and the known LACs among currently cultivated grain crops and vegetables are re-evaluated. The low HM accumulation by LACs is affected by crop ecophysiological features and soil physicochemical characteristics. Taking low Cd accumulating cultivars as an example, it is known that they can efficiently exclude Cd from entering their edible parts in three ways: 1) decrease in root Cd uptake by reducing organic acids secretion in the rhizosphere and transport protein production; 2) restriction of Cd translocation from roots to shoots via enhanced Cd retention in the cell wall and Cd sequestration in vacuoles; and 3) reduction in Cd translocation from shoots to grains by limiting Cd redirection and remobilization mediated through nodes. We propose an LAC application strategy focused on LACs and optimized to work with other agronomic measures according to the classification of HM risk level for LACs, providing a cost-effective and practical solution for safe utilization of large areas of farmland polluted with low to moderate levels of HMs.
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Affiliation(s)
- Liang Wang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS), Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China
| | - Qingying Zhang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS), Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyong Liao
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS), Beijing 100101, China; Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China.
| | - Xiaohua Li
- Rural Energy & Environment Agency, Ministry of Agriculture, Beijing 100125, China
| | - Shunan Zheng
- Rural Energy & Environment Agency, Ministry of Agriculture, Beijing 100125, China
| | - Fenghua Zhao
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS), Beijing 100101, China
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González A, Laporte D, Moenne A. Cadmium Accumulation Involves Synthesis of Glutathione and Phytochelatins, and Activation of CDPK, CaMK, CBLPK, and MAPK Signaling Pathways in Ulva compressa. FRONTIERS IN PLANT SCIENCE 2021; 12:669096. [PMID: 34234796 PMCID: PMC8255929 DOI: 10.3389/fpls.2021.669096] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/12/2021] [Indexed: 06/13/2023]
Abstract
In order to analyze the effect of cadmium in Ulva compressa (Chlorophyta), the alga was cultivated with 10, 25, and 50 μM of cadmium for 7 days, and the level of intracellular cadmium was determined. Intracellular cadmium showed an increase on day 1, no change until day 5, and an increase on day 7. Then, the alga was cultivated with 10 μM for 7 days, and the level of hydrogen peroxide, superoxide anions, and lipoperoxides; activities of antioxidant enzymes ascorbate peroxidase (AP), dehydroascorbate reductase (DHAR), and glutathione reductase (GR); the level of glutathione (GSH) and ascorbate (ASC); and the level of phytochelatins (PCs) and transcripts encoding metallothioneins (UcMTs) levels were determined. The level of hydrogen peroxide increased at 2 and 12 h, superoxide anions on day 1, and lipoperoxides on days 3 to 5. The activities of AP and GR were increased, but not the DHAR activity. The level of GSH increased on day 1, decreased on day 3, and increased again on day 5, whereas ASC slightly increased on days 3 and 7, and activities of enzymes involved in GSH and ASC synthesis were increased on days 3 to 7. The level of PC2 and PC4 decreased on day 3 but increased again on day 5. The level of transcripts encoding UcMT1 and UcMT2 increased on days 3 to 5, mainly that of UcMT2. Thus, cadmium accumulation induced an oxidative stress condition that was mitigated by the activation of antioxidant enzymes and synthesis of GSH and ASC. Then, the alga cultivated with inhibitors of calcium-dependent protein kinases (CDPKs), calmodulin-dependent protein kinases (CaMKs), calcineurin B-like protein kinases (CBLPKs), and MAPKs and 10 μM of cadmium for 5 days showed a decrease in intracellular cadmium and in the level of GSH and PCs, with the four inhibitors, and in the level of transcripts encoding UcMTs, with two inhibitors. Thus, CDPKs, CaMK, CBLPKS, and MAPKs are involved in cadmium accumulation and GSH and PC synthesis, and GSH and PCs and/or UcMTs may participate in cadmium accumulation.
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Affiliation(s)
- Alberto González
- Laboratory of Marine Biotechnology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
| | - Daniel Laporte
- Laboratorio Multidisciplinario, Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Talca, Chile
| | - Alejandra Moenne
- Laboratory of Marine Biotechnology, Faculty of Chemistry and Biology, University of Santiago, Santiago, Chile
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Pons ML, Collin B, Doelsch E, Chaurand P, Fehlauer T, Levard C, Keller C, Rose J. X-ray absorption spectroscopy evidence of sulfur-bound cadmium in the Cd-hyperaccumulator Solanum nigrum and the non-accumulator Solanum melongena. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 279:116897. [PMID: 33774364 DOI: 10.1016/j.envpol.2021.116897] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/24/2021] [Accepted: 03/02/2021] [Indexed: 06/12/2023]
Abstract
It has been proposed that non-protein thiols and organic acids play a major role in cadmium phytoavailability and distribution in plants. In the Cd-hyperaccumulator Solanum nigrum and non-accumulator Solanum melongena, the role of these organic ligands in the accumulation and detoxification mechanisms of Cd are debated. In this study, we used X-ray absorption spectroscopy to investigate Cd speciation in these plants (roots, stem, leaves) and in the soils used for their culture to unravel the plants responses to Cd exposure. The results show that Cd in the 100 mg kg-1 Cd-doped clayey loam soil is sorbed onto iron oxyhydroxides. In both S. nigrum and S. melongena, Cd in roots and fresh leaves is mainly bound to thiol ligands, with a small contribution of inorganic S ligands in S. nigrum leaves. We interpret the Cd binding to sulfur ligands as detoxification mechanisms, possibly involving the sequestration of Cd complexed with glutathione or phytochelatins in the plant vacuoles. In the stems, results show an increase binding of Cd to -O ligands (>50% for S. nigrum). We suggest that Cd is partly complexed by organic acids for transportation in the sap.
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Affiliation(s)
- Marie-Laure Pons
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France.
| | - Blanche Collin
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France
| | - Emmanuel Doelsch
- CIRAD, UPR Recyclage et Risque, F-34398, Montpellier, France; Recyclage et Risque, Univ Montpellier, CIRAD, Montpellier, France
| | - Perrine Chaurand
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France
| | - Till Fehlauer
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France
| | - Clément Levard
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France
| | - Catherine Keller
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France
| | - Jérôme Rose
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE UMR 7330, Aix en Provence, France
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Ratié G, Chrastný V, Guinoiseau D, Marsac R, Vaňková Z, Komárek M. Cadmium Isotope Fractionation during Complexation with Humic Acid. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:7430-7444. [PMID: 33970606 DOI: 10.1021/acs.est.1c00646] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) isotopes are known to fractionate during complexation with various environmentally relevant surfaces and ligands. Our results, which were obtained using (i) batch experiments at different Cd concentrations, ionic strengths, and pH values, (ii) modeling, and (iii) infrared and X-ray absorption spectroscopies, highlight the preferential enrichment of light Cd isotopes bound to humic acid (HA), leaving the heavier Cd pool preferentially in solution (Δ114/110CdHA-Cd(aq) of -0.15 ± 0.01‰). At high ionic strengths, Cd isotope fractionation mainly depends on its complexation with carboxylic sites. Outer-sphere complexation occurs at equilibrium together with inner-sphere complexation as well as with the change of the first Cd coordination and its hydration complexes in solution. At low ionic strengths, nonspecific Cd binding induced by electrostatic attractions plays a dominant role and promotes Cd isotope fractionation during complexation. This significant outcome elucidates the mechanisms involved in HA-Cd interactions. The results can be used during (i) fingerprinting the available Cd in soil solution after its complexation with solid or soluble natural organic matter and (ii) evaluating the contribution of Cd complexation with organic ligands and phytoplankton-derived debris versus Cd assimilation by phytoplankton in seawater.
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Affiliation(s)
- Gildas Ratié
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague-Suchdol, Czech Republic
| | - Vladislav Chrastný
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague-Suchdol, Czech Republic
| | - Damien Guinoiseau
- Université de Paris, Institut de physique du globe de Paris, CNRS, F-75005 Paris, France
- Aix Marseille University, CNRS, IRD, INRAE, Coll France, CEREGE, F-13545 Aix-en-Provence, France
| | - Rémi Marsac
- Univ Rennes, CNRS, Géosciences Rennes - UMR 6118, F-35000 Rennes, France
| | - Zuzana Vaňková
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague-Suchdol, Czech Republic
| | - Michael Komárek
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague-Suchdol, Czech Republic
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75
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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 SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 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] [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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Xie Q, Yu Q, Jobe TO, Pham A, Ge C, Guo Q, Liu J, Liu H, Zhang H, Zhao Y, Xue S, Hauser F, Schroeder JI. An amiRNA screen uncovers redundant CBF and ERF34/35 transcription factors that differentially regulate arsenite and cadmium responses. PLANT, CELL & ENVIRONMENT 2021; 44:1692-1706. [PMID: 33554343 PMCID: PMC8068611 DOI: 10.1111/pce.14023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/02/2021] [Accepted: 02/05/2021] [Indexed: 05/09/2023]
Abstract
Arsenic stress causes rapid transcriptional responses in plants. However, transcriptional regulators of arsenic-induced gene expression in plants remain less well known. To date, forward genetic screens have proven limited for dissecting arsenic response mechanisms. We hypothesized that this may be due to the extensive genetic redundancy present in plant genomes. To overcome this limitation, we pursued a forward genetic screen for arsenite tolerance using a randomized library of plants expressing >2,000 artificial microRNAs (amiRNAs). This library was designed to knock-down diverse combinations of homologous gene family members within sub-clades of transcription factor and transporter gene families. We identified six transformant lines showing an altered response to arsenite in root growth assays. Further characterization of an amiRNA line targeting closely homologous CBF and ERF transcription factors show that the CBF1,2 and 3 transcription factors negatively regulate arsenite sensitivity. Furthermore, the ERF34 and ERF35 transcription factors are required for cadmium resistance. Generation of CRISPR lines, higher-order T-DNA mutants and gene expression analyses, further support our findings. These ERF transcription factors differentially regulate arsenite sensitivity and cadmium tolerance.
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Affiliation(s)
- Qingqing Xie
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
- Plant Molecular and Cellular Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P. R. China
- These authors contributed equally to this work
| | - Qi Yu
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
- School of Life Sciences, and Hubei Key Laboratory of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan 430079, Hubei, P. R. China
- These authors contributed equally to this work
| | - Timothy O. Jobe
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
- Institute for Plant Sciences and Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, 50674 Cologne, Germany
- These authors contributed equally to this work
| | - Allis Pham
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
| | - Chennan Ge
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
| | - Qianqian Guo
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P. R. China
| | - Jianxiu Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P. R. China
| | - Honghong Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P. R. China
| | - Huijie Zhang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P. R. China
| | - Yunde Zhao
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
| | - Shaowu Xue
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P. R. China
| | - Felix Hauser
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
| | - Julian I. Schroeder
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, La Jolla, California 92093-0116, USA
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77
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Analysis of Cadmium Root Retention for Two Contrasting Rice Accessions Suggests an Important Role for OsHMA2. PLANTS 2021; 10:plants10040806. [PMID: 33923918 PMCID: PMC8073749 DOI: 10.3390/plants10040806] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 11/21/2022]
Abstract
Two rice accessions, Capataz and Beirao, contrasting for cadmium (Cd) tolerance and root retention, were exposed to a broad range of Cd concentrations (0.01, 0.1, and 1 μM) and analyzed for their potential capacity to chelate, compartmentalize, and translocate Cd to gain information about the relative contribution of these processes in determining the different pathways of Cd distribution along the plants. In Capataz, Cd root retention increased with the external Cd concentration, while in Beirao it resulted independent of Cd availability and significantly higher than in Capataz at the lowest Cd concentrations analyzed. Analysis of thiol accumulation in the roots revealed that the different amounts of these compounds in Capataz and Beirao, as well as the expression levels of genes involved in phytochelatin biosynthesis and direct Cd sequestration into the vacuoles of the root cells, were not related to the capacity of the accessions to trap the metal into the roots. Interestingly, the relative transcript abundance of OsHMA2, a gene controlling root-to-shoot Cd/Zn translocation, was not influenced by Cd exposure in Capataz and progressively increased in Beirao with the external Cd concentration, suggesting that activity of the OsHMA2 transporter may differentially limit root-to-shoot Cd/Zn translocation in Capataz and Beirao.
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78
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Mawia AM, Hui S, Zhou L, Li H, Tabassum J, Lai C, Wang J, Shao G, Wei X, Tang S, Luo J, Hu S, Hu P. Inorganic arsenic toxicity and alleviation strategies in rice. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124751. [PMID: 33418521 DOI: 10.1016/j.jhazmat.2020.124751] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/29/2020] [Accepted: 11/30/2020] [Indexed: 05/28/2023]
Abstract
Direct or indirect exposure to inorganic arsenic (iAs) in the forms of AsIII (arsenite) and AsV (arsenate) through consumption of As-contaminated food materials and drinking water leads to arsenic poisoning. Rice (Oryza sativa L.) plant potentially accumulates a high amount of iAs from paddy fields than any other cereal crops. This makes it to be a major source of iAs especially among the population that uses it as their dominant source of diet. The accumulation of As in human bodies poses a serious global health risk to the human population. Various conventional methods have been applied to reduce the arsenic accumulation in rice plant. However, the success rate of these techniques is low. Therefore, the development of efficient and effective methods aimed at lowering iAs toxicity is a very crucial public concern. With the current advancement in technology, new strategies aimed at addressing this concern are being developed and utilized in various parts of the world. In this review, we discuss the recent advances in the management of iAs in rice plants emphasizing the use of nanotechnology and biotechnology approaches. Also, the prospects and challenges facing these approaches are described.
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Affiliation(s)
- Amos Musyoki Mawia
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Suozhen Hui
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Liang Zhou
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Huijuan Li
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Javaria Tabassum
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Changkai Lai
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Jingxin Wang
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Gaoneng Shao
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Xiangjin Wei
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Shaoqing Tang
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
| | - Ju Luo
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China.
| | - Shikai Hu
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China.
| | - Peisong Hu
- State Key Laboratory of Rice Biology, China National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China.
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79
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Campos ACAL, van Dijk WFA, Ramakrishna P, Giles T, Korte P, Douglas A, Smith P, Salt DE. 1,135 ionomes reveal the global pattern of leaf and seed mineral nutrient and trace element diversity in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:536-554. [PMID: 33506585 DOI: 10.1111/tpj.15177] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 01/07/2021] [Accepted: 01/20/2021] [Indexed: 05/06/2023]
Abstract
Soil is a heterogeneous reservoir of essential elements needed for plant growth and development. Plants have evolved mechanisms to balance their nutritional needs based on availability of nutrients. This has led to genetically based variation in the elemental composition, the 'ionome', of plants, both within and between species. We explore this natural variation using a panel of wild-collected, geographically widespread Arabidopsis thaliana accessions from the 1001 Genomes Project including over 1,135 accessions, and the 19 parental accessions of the Multi-parent Advanced Generation Inter-Cross (MAGIC) panel, all with full-genome sequences available. We present an experimental design pipeline for high-throughput ionomic screenings and analyses with improved normalisation procedures to account for errors and variability in conditions often encountered in large-scale, high-throughput data collection. We report quantification of the complete leaf and seed ionome of the entire collection using this pipeline and a digital tool, Ion Explorer, to interact with the dataset. We describe the pattern of natural ionomic variation across the A. thaliana species and identify several accessions with extreme ionomic profiles. It forms a valuable resource for exploratory genetic mapping studies to identify genes underlying natural variation in leaf and seed ionome and genetic adaptation of plants to soil conditions.
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Affiliation(s)
- Ana Carolina A L Campos
- Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, United Kingdom
| | - William F A van Dijk
- Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, United Kingdom
| | - Priya Ramakrishna
- Future Food Beacon of Excellence and School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, United Kingdom
| | - Tom Giles
- Digital Research Service and Advanced Data Analysis Centre, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, United Kingdom
| | - Pamela Korte
- Gregor Mendel Institute of Molecular Plant Biology, Vienna, Austria
| | - Alex Douglas
- Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, United Kingdom
| | - Pete Smith
- Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, United Kingdom
| | - David E Salt
- Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, United Kingdom
- Future Food Beacon of Excellence and School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, United Kingdom
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80
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Angulo-Bejarano PI, Puente-Rivera J, Cruz-Ortega R. Metal and Metalloid Toxicity in Plants: An Overview on Molecular Aspects. PLANTS (BASEL, SWITZERLAND) 2021; 10:635. [PMID: 33801570 PMCID: PMC8066251 DOI: 10.3390/plants10040635] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 12/17/2022]
Abstract
Worldwide, the effects of metal and metalloid toxicity are increasing, mainly due to anthropogenic causes. Soil contamination ranks among the most important factors, since it affects crop yield, and the metals/metalloids can enter the food chain and undergo biomagnification, having concomitant effects on human health and alterations to the environment. Plants have developed complex mechanisms to overcome these biotic and abiotic stresses during evolution. Metals and metalloids exert several effects on plants generated by elements such as Zn, Cu, Al, Pb, Cd, and As, among others. The main strategies involve hyperaccumulation, tolerance, exclusion, and chelation with organic molecules. Recent studies in the omics era have increased knowledge on the plant genome and transcriptome plasticity to defend against these stimuli. The aim of the present review is to summarize relevant findings on the mechanisms by which plants take up, accumulate, transport, tolerate, and respond to this metal/metalloid stress. We also address some of the potential applications of biotechnology to improve plant tolerance or increase accumulation.
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Affiliation(s)
- Paola I. Angulo-Bejarano
- Laboratorio de Alelopatía, Departamento de Ecología Funcional, Instituto de Ecología, Universidad Nacional Autónoma de México, UNAM, 275, Ciudad Universitaria D.F. Circuito Exterior s/n Anexo al Jardín Botánico Exterior, México City 04510, Mexico; (P.I.A.-B.); (J.P.-R.)
- School of Engineering and Sciences, Centre of Bioengineering, Tecnologico de Monterrey, Queretaro 21620, Mexico
| | - Jonathan Puente-Rivera
- Laboratorio de Alelopatía, Departamento de Ecología Funcional, Instituto de Ecología, Universidad Nacional Autónoma de México, UNAM, 275, Ciudad Universitaria D.F. Circuito Exterior s/n Anexo al Jardín Botánico Exterior, México City 04510, Mexico; (P.I.A.-B.); (J.P.-R.)
| | - Rocío Cruz-Ortega
- Laboratorio de Alelopatía, Departamento de Ecología Funcional, Instituto de Ecología, Universidad Nacional Autónoma de México, UNAM, 275, Ciudad Universitaria D.F. Circuito Exterior s/n Anexo al Jardín Botánico Exterior, México City 04510, Mexico; (P.I.A.-B.); (J.P.-R.)
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81
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Qiu CW, Zhang C, Wang NH, Mao W, Wu F. Strigolactone GR24 improves cadmium tolerance by regulating cadmium uptake, nitric oxide signaling and antioxidant metabolism in barley (Hordeum vulgare L.). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 273:116486. [PMID: 33484996 DOI: 10.1016/j.envpol.2021.116486] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 12/17/2020] [Accepted: 01/07/2021] [Indexed: 05/27/2023]
Abstract
Cadmium (Cd) in the food chain poses a serious hazard to human health. Therefore, a greenhouse hydroponic experiment was conducted to examine the potential of exogenously strigolactone GR24 in lessening Cd toxicity and to investigate its physiological mechanisms in the two barley genotypes, W6nk2 (Cd-sensitive) and Zhenong8 (Cd-tolerant). Exogenous application of 1 μM GR24 (strigol analogue) reduced the suppression of growth caused by 10 μM Cd, lowered plant Cd contents, increased the contents of other nutrient elements, protected chlorophyll, sustained photosynthesis, and markedly reduced Cd-induced H2O2 and malondialdehyde accumulation in barley. Furthermore, exogenous GR24 markedly increased NO contents and nitric oxide synthase activity in the Cd-sensitive genotype, W6nk2, effectively alleviating the Cd-induced repression of the activities of superoxide dismutase and peroxidase, increasing reduced glutathione (GSH) and ascorbic acid (AsA) pools and activities of AsA-GSH cycle including ascorbate peroxidase, glutathione peroxidase, glutathione reductase, dehydroascorbate reductase and monodehydroascorbate reductase. The findings of the present study indicate that GR24 could be a candidate for Cd detoxification by decreasing Cd contents, balancing nutrient elements, and protecting barley plants from toxic oxidation via indirectly eliminating reactive oxygen species (ROS), consequently contributing to reducing the potential risk of Cd pollution.
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Affiliation(s)
- Cheng-Wei Qiu
- Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
| | - Can Zhang
- Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Nian-Hong Wang
- Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Weihua Mao
- Bio-Macromolecules Analysis Lab, Analysis Center of Agrobiology and Environmental Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Feibo Wu
- Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China.
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82
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Huang Y, Chen J, Zhang D, Fang B, YangJin T, Zou J, Chen Y, Su N, Cui J. Enhanced vacuole compartmentalization of cadmium in root cells contributes to glutathione-induced reduction of cadmium translocation from roots to shoots in pakchoi (Brassica chinensis L.). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111616. [PMID: 33396136 DOI: 10.1016/j.ecoenv.2020.111616] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/10/2020] [Accepted: 11/04/2020] [Indexed: 06/12/2023]
Abstract
Our previous studies showed that exogenous glutathione (GSH) decreased cadmium (Cd) concentration in shoots and alleviated the growth inhibition in pakchoi (Brassica chinensis L.) under Cd stress. Nevertheless, it is largely unknown how GSH decreases Cd accumulation in edible parts of pakchoi. This experiment mainly explored the mechanisms of GSH-induced reduction of Cd accumulation in shoot of pakchoi. The results showed that compared with sole Cd treatment, Cd + GSH treatment remarkably increased the expression of BcIRT1 and BcIRT2, and further enhanced the concentrations of Cd and Fe in root. By contrast, GSH application declined the concentration of Cd in the xylem sap. However, these results were not caused by xylem loading process because the expression of BcHMA2 and BcHMA4 had not significant difference between sole Cd treatment and Cd + GSH treatment. In addition, exogenous GSH significantly enhanced the expression of BcPCS1 and promoted the synthesis of PC2, PC3 and PC4 under Cd stress. At the same time, exogenous GSH also significantly improved the expression of BcABCC1 and BcABCC2 in the roots of seedling under Cd stress, suggesting that more PCs-Cd complexes may be sequestrated into vacuoles by ABCC1 and ABCC2 transporters. The results showed that exogenous GSH could up-regulate the expression of BcIRT1/2 to increase the Cd accumulation in root, and the improvement of PCs contents and the expression of BcABCC1/2 enhanced the compartmentalization of Cd in root vacuole of pakchoi under Cd stress. To sum up, exogenous GSH reduce the concentration of free Cd2+ in the cytoplast of root cells and then dropped the loading of Cd into the xylem, which eventually given rise to the reduction of Cd accumulation in edible portion of pakchoi.
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Affiliation(s)
- Yifan Huang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jiahui Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Derui Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Bo Fang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Tsering YangJin
- College of Plant Science, Tibet Agriculture and Animal Husbandry College, Linzhi, China
| | - Jianwen Zou
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yahua Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
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83
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He M, Tian Z, Liu Q, Guo Y. Trichoderma asperellum promotes cadmium accumulation within maize seedlings. BIOTECHNOL BIOTEC EQ 2021. [DOI: 10.1080/13102818.2021.1997155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Mengting He
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| | - Zengyuan Tian
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| | - Qianqian Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| | - Yuqi Guo
- School of Life Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
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84
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An Q, He X, Zheng N, Hou S, Sun S, Wang S, Li P, Li X, Song X. Physiological and genetic effects of cadmium and copper mixtures on carrot under greenhouse cultivation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111363. [PMID: 32977082 DOI: 10.1016/j.ecoenv.2020.111363] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/09/2020] [Accepted: 09/13/2020] [Indexed: 06/11/2023]
Abstract
The exposure to combinations of heavy metals can affect the genes of vegetables and heavy metals would accumulate in vegetables and thereby indirectly affecting human health. Exploring the links between genetic changes and phenotypic changes of carrot under the combined pollution of Cd and Cu is of great significance for studying the mechanism of heavy metal pollution. Therefore, this study examined the effects of mixtures of cadmium (Cd) and copper (Cu) on physiological measures (malondialdehyde (MDA), proline, and antioxidant enzyme) and expression of growth-related genes (gibberellin gene, carotene gene, and glycogene) in carrot under greenhouse cultivation. The results showed in the additions with mixtures of Cd and Cu at higher concentration, the MDA content increased significantly (p < 0.05), whereas the proline content was not significantly different from those in the control. In the mixed treatments with high Cd concentrations, the activity of superoxide dismutase (SOD) was significantly lower than that in the control (p < 0.05); whereas the activity of peroxidase (POD) increased to different degrees compared to the control. In the additions with mixtures of Cd and Cu, compared with the control, the expression of the gibberellin gene was downregulated from 1.97 to 20.35 times (not including the 0.2 mg kg-1 Cd and 20 mg kg-1 Cu mixture, the expression of gibberellin gene in this treatment was upregulated 1.29 times), which lead to decreases in the length and dry weight of carrots. The expression of the carotene gene in mixed treatments downregulated more than that in single treatments, which could reduce the ability of carrots to resist oxidative damage, as suggested by the significant increase in the MDA content. In the addition with mixtures of Cd and Cu, compared with the control, the expression of the glycogene was downregulated by 1.42-59.40 times, which can cause a significant reduction in the sugar content in carrots and possibly further reduce their ability to resist heavy metal damage. A cluster analysis showed that in the additions with mixtures of Cd and Cu, the plant phenotype was affected first, and then with increases in the added concentration, the expression of genes was also affected. In summary, in the additions with mixtures of Cd and Cu, plants were damaged as Cd and Cu concentrations increased.
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Affiliation(s)
- Qirui An
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, China
| | - Xiaolan He
- Soil and Fertilizer Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, China
| | - Na Zheng
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, China; Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin, China.
| | - Shengnan Hou
- Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Siyu Sun
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, China
| | - Sujing Wang
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, China
| | - Penyang Li
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, China
| | - Xiaoqian Li
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, China
| | - Xue Song
- Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin, China
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85
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Li Z, Juneau P, Lian Y, Zhang W, Wang S, Wang C, Shu L, Yan Q, He Z, Xu K. Effects of Titanium Dioxide Nanoparticles on Photosynthetic and Antioxidative Processes of Scenedesmus obliquus. PLANTS 2020; 9:plants9121748. [PMID: 33321890 PMCID: PMC7763043 DOI: 10.3390/plants9121748] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/07/2020] [Accepted: 12/07/2020] [Indexed: 02/05/2023]
Abstract
The effects of the photocatalytic toxicity of titanium dioxide nanoparticle (nano-TiO2) on phytoplankton are well understood. However, as UV light intensity decreases sharply with the depth of the water column, the effects of nano-TiO2 itself on deeper water phytoplankton, such as green algae, need further research. In this research, we investigated the effects of three sizes of TiO2 (10, 50 and 200 nm) on the photosynthetic and antioxidative processes of Scenedesmus obliquus in the absence of UV light. We found that 50 nm and 10 nm TiO2 (10 mg/L) inhibited growth rates and the maximal photosystem II quantum yield compared to the control in Scenedesmus obliquus. The minimal and maximal fluorescence yields, and the contents of reactive oxygen species and lipid peroxidation, increased, indicating that photosynthetic energy/electrons transferred to oxygen and induced oxidative stress in nano-TiO2-treated samples. In addition, we found that aggregations of algae and 10 nm TiO2 were present, which could induce cell membrane disruption, and vacuoles were induced to cope with nano-TiO2 stress in Scenedesmus obliquus. These results enhance our understanding of the effects of nano-TiO2 on the photosynthetic and antioxidative processes of green algae, and provide basic information for evaluating the ecotoxicity of nano-TiO2 in freshwater ecosystems.
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Affiliation(s)
- Zhou Li
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Philippe Juneau
- Department of Biological Sciences, GRIL-EcotoQ-TOXEN, Ecotoxicology of Aquatic Microorganisms Laboratory, Université du Québec à Montréal, Succ. Centre-Ville, Montréal, QC H3C 3P8, Canada;
| | - Yingli Lian
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Wei Zhang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Shanquan Wang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Cheng Wang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Longfei Shu
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Qingyun Yan
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
| | - Zhili He
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
- College of Agronomy, Hunan Agricultural University, Changsha 410128, Hunan, China
- Correspondence: (Z.H.); (K.X.)
| | - Kui Xu
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou 510006, Guangdong, China; (Z.L.); (Y.L.); (W.Z.); (S.W.); (C.W.); (L.S.); (Q.Y.)
- Correspondence: (Z.H.); (K.X.)
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86
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Liu Q, Zhang Y, Wang Y, Wang W, Gu C, Huang S, Yuan H, Dhankher OP. Quantitative proteomic analysis reveals complex regulatory and metabolic response of Iris lactea Pall. var. chinensis to cadmium toxicity. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123165. [PMID: 32569986 DOI: 10.1016/j.jhazmat.2020.123165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/13/2020] [Accepted: 06/06/2020] [Indexed: 05/28/2023]
Abstract
Cadmium pollution has become a serious environmental problem. Iris lactea var. chinensis showed strong Cd tolerance and accumulation ability, which has significant potential to be applied for the phytoremediation of Cd-contaminated soil. However, the lack of molecular information on the mechanism of I. lactea response to Cd limited the improvement of phytoremediation efficiency. In this study, label-free proteomics analysis of Cd response in I. lactea showed that there were 163 and 196 differentially expressed proteins (DEPs) in the shoots and roots, respectively. Bioinformatics analysis indicated the DEPs responding to Cd stress mainly involved in signal transduction, ion transport, redox etc., and participate in the pathway of amino acid biosynthesis, lignin biosynthesis, glycerolipid metabolism and glutathione metabolism. Besides, differential expression of seven DEPs was validated via gene expression analysis. Finally, we found that a Cd-induced mannose-specific lectin (IlMSL) from I. lactea enhanced the Cd sensitivity and increased Cd accumulation in yeast. The results of this study will enhance our understanding of the molecular mechanism of Cd tolerance and accumulation in I. lactea and ultimately provide valuable resources for using Cd tolerant genes for developing efficient strategies for phytoremediation of Cd-contaminated soils or limiting Cd accumulation in food crops.
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Affiliation(s)
- Qingquan Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Yongxia Zhang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Yinjie Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Weilin Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Chunsun Gu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Suzhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Haiyan Yuan
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China.
| | - Om Parkash Dhankher
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, MA 01003, USA.
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87
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Dai F, Luo G, Li Z, Wei X, Wang Z, Lin S, Tang C. Physiological and transcriptomic analyses of mulberry (Morus atropurpurea) response to cadmium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111298. [PMID: 32950806 DOI: 10.1016/j.ecoenv.2020.111298] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 06/11/2023]
Abstract
Mulberry (Morus atropurpurea) is an economically important woody tree and has great potential for the remediation of heavy metals. To investigate how cadmium accumulates and its detoxification in mulberry, we assessed the physiological and transcriptomic effects of cadmium contamination and as well as its chemical forms and subcellular distribution. Cadmium significantly inhibited mulberry plant growth and primarily accumulated in mulberry roots. Antioxidant enzymes were induced by cadmium in all tissues of mulberry. Subcellular fractionation analyses of cadmium indicated that the majority was compartmentalized in soluble fraction in roots while it mainly located in cell wall in leaves and stems. The greatest amount of the cadmium was integrated with proteins and pectates in all mulberry tissues. RNA-seq transcriptomic analyses of mulberry roots revealed that various metabolic pathways involved in cadmium stress response such as RNA regulation, hormone metabolism, and response to stress, secondary metabolism, as well as signaling, protein metabolism, transport, and cell-wall metabolism. These results will increase our understanding of the molecular mechanisms of cadmium detoxification in mulberry and provide new insights into engineering woody plants for phytoremediation.
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Affiliation(s)
- Fanwei Dai
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Guoqing Luo
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Zhiyi Li
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Xu Wei
- University of Florida, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Zhenjiang Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Sen Lin
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Cuiming Tang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China.
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88
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Dai F, Luo G, Li Z, Wei X, Wang Z, Lin S, Tang C. Physiological and transcriptomic analyses of mulberry (Morus atropurpurea) response to cadmium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020. [PMID: 32950806 DOI: 10.artn11129810.1016/j.ecoenv.2020.111298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Mulberry (Morus atropurpurea) is an economically important woody tree and has great potential for the remediation of heavy metals. To investigate how cadmium accumulates and its detoxification in mulberry, we assessed the physiological and transcriptomic effects of cadmium contamination and as well as its chemical forms and subcellular distribution. Cadmium significantly inhibited mulberry plant growth and primarily accumulated in mulberry roots. Antioxidant enzymes were induced by cadmium in all tissues of mulberry. Subcellular fractionation analyses of cadmium indicated that the majority was compartmentalized in soluble fraction in roots while it mainly located in cell wall in leaves and stems. The greatest amount of the cadmium was integrated with proteins and pectates in all mulberry tissues. RNA-seq transcriptomic analyses of mulberry roots revealed that various metabolic pathways involved in cadmium stress response such as RNA regulation, hormone metabolism, and response to stress, secondary metabolism, as well as signaling, protein metabolism, transport, and cell-wall metabolism. These results will increase our understanding of the molecular mechanisms of cadmium detoxification in mulberry and provide new insights into engineering woody plants for phytoremediation.
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Affiliation(s)
- Fanwei Dai
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Guoqing Luo
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Zhiyi Li
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Xu Wei
- University of Florida, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Zhenjiang Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Sen Lin
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Cuiming Tang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China.
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89
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Glutathione Restores Hg-Induced Morpho-Physiological Retardations by Inducing Phytochelatin and Oxidative Defense in Alfalfa. BIOLOGY 2020; 9:biology9110364. [PMID: 33126453 PMCID: PMC7693861 DOI: 10.3390/biology9110364] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/24/2020] [Accepted: 10/26/2020] [Indexed: 01/10/2023]
Abstract
Simple Summary An ecofriendly approach to mitigate mercury (Hg) toxicity in alfalfa, one of the important forage crops, is highly desirable for environmental sustainability. In this study, the exogenous glutathione (GSH) substantially improved the morphological hindrance and photosynthesis inefficiency in Hg-exposed alfalfa plants. In addition, the Fe and S status of Cd-toxic alfalfa was restored due to GSH supplementation. Interestingly, GSH applied to Hg-exposed plants showed elevated Hg concentration in roots resulted in a substantial deposition of Hg in the root cell wall due to the upregulation of MsPCS1 and MsGSH1 genes in roots. It implies that GSH induces PC accumulation in roots enabling excess Hg bound to the cell wall, thereby limiting the transport of Hg to the aerial part of alfalfa. In silico analysis further suggests a conserved motif linked to the phytochelatin synthase domain (CL0125). In addition, GSH induced the GSH concentration and GR activity in protecting alfalfa plants from Hg-induced oxidative damage. These findings can be useful to formulate GSH-based fertilizer or to develop Hg-tolerant alfalfa plants. Abstract Mercury (Hg) is toxic to plants, but the effect of glutathione in Hg alleviation was never studied in alfalfa, an important forage crop. In this study, Hg toxicity showed morphological retardation, chlorophyll reduction, and PSII inefficiency, which was restored due to GSH supplementation in alfalfa plants treated with Hg. Results showed a significant increase of Hg, but Fe and S concentrations substantially decreased in root and shoot accompanied by the downregulation of Fe (MsIRT1) and S (MsSultr1;2 and MsSultr1;3) transporters in roots of Hg-toxic alfalfa. However, GSH caused a significant decrease of Hg in the shoot, while the root Hg level substantially increased, accompanied by the restoration of Fe and S status, relative to Hg-stressed alfalfa. The subcellular analysis showed a substantial deposition of Hg in the root cell wall accompanied by the increased GSH and PC and the upregulation of MsPCS1 and MsGSH1 genes in roots. It suggests the involvement of GSH in triggering PC accumulation, causing excess Hg bound to the cell wall of the root, thereby reducing Hg translocation in alfalfa. Bioinformatics analysis showed that the MsPCS1 protein demonstrated one common conserved motif linked to the phytochelatin synthase domain (CL0125) with MtPCS1 and AtMCS1 homologs. These in silico analysis further confirmed the detoxification role of MsPCS1 induced by GSH in Hg-toxic alfalfa. Additionally, GSH induces GSH and GR activity to counteract oxidative injuries provoked by Hg-induced H2O2 and lipid peroxidation. These findings may provide valuable knowledge to popularize GSH-derived fertilizer or to develop Hg-free alfalfa or other forage plants.
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90
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Gao Y, Li H, Song Y, Zhang F, Lu Y, Peng F, Yang Z. Decisive Enzymes and Prediction Models for the Glutathione Content in Spinach ( Spinacia oleracea L.) Exposed to Cadmium. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:11855-11862. [PMID: 32986429 DOI: 10.1021/acs.jafc.0c04643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In plants, glutathione (GSH) is crucial for the detoxification and tolerance of heavy metals. However, the change characteristics and decisive enzymes involved in GSH metabolism under heavy metal exposure are still unclear. Based on long-term exposure cultivation of spinach and monitoring of the change trends of enzyme activity and GSH contents in response to cadmium (Cd) stress, these issues were clarified. Spinach goes through three statuses in sequence in response to Cd stress, that is, perception status (PS), response status (RS), and new stable status. With the increase in the Cd concentration, the durations of the PS and RS and the time to reach the peaks in the roots were shorter. However, the durations of the PS and the time to reach the peaks in the leaves were longer. The enzyme activities changed significantly in response to diverse Cd stress in RS. γ-glutamyl transpeptidase was vital to the GSH content in roots. Glutathione synthase was important for the GSH content in leaves. The results of this study provide valuable information to find an efficient way to perform GSH adjustments to fulfill the goal of ensuring food safety.
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Affiliation(s)
- Ya Gao
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Haipu Li
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha 410083, China
| | - Yang Song
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Fenglin Zhang
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Yi Lu
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Fangyuan Peng
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Zhaoguang Yang
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha 410083, China
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91
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Su H, Zou T, Lin R, Zheng J, Jian S, Zhang M. Characterization of a phytochelatin synthase gene from Ipomoea pes-caprae involved in cadmium tolerance and accumulation in yeast and plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:743-755. [PMID: 32866789 DOI: 10.1016/j.plaphy.2020.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 05/21/2023]
Abstract
Phytochelatin synthases (PCSs) play a crucial part in heavy metal tolerance in plants via the synthesis of phytochelatins (PCs), which can chelate heavy metals (HMs) in the vacuole and decrease cell damage. Plant PCSs are commonly designated as key genes for phytoremediation. In this study, we identified a PCS gene (IpPCS1) from Ipomoea pes-caprae and investigated its role in regulating cadmium (Cd) tolerance and accumulation. The expression of a truncated IpPCS1t in yeast could complement the Cd-sensitive phenotype of the ycf1Δ mutant strain, as well as improve the Cd tolerance of the wild-type yeast strain, while promoting Cd accumulation in the yeast cells. The expression of IpPCS1 was induced in I. pes-caprae plants under Cd treatment. Compared with IpPCS1, the lack of a C-terminal in IpPCS1t did not affect its Cd tolerance, but might restrict the zinc (Zn) detoxification in yeast. The overexpression of IpPCS1t in Arabidopsis could improve the Cd tolerance slightly and had little impact on Cd accumulation in transgenic plant. Our results indicated that IpPCS1 has certain potential application value in Cd tolerance and detoxification, therefore provides a useful genetic resource for enhancing Cd tolerance and improving the Cd phytoremediation capacity of plants or organisms. In addition, our research is the first time to discover a new possible Cd activation site in the C-terminal of IpPCS1.
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Affiliation(s)
- Huaxiang Su
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, 100039, China
| | - Tao Zou
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, 100039, China
| | - Ruoyi Lin
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, 100039, China
| | - Jiexuan Zheng
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, 100039, China
| | - Shuguang Jian
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Mei Zhang
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou, 510650, China.
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92
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Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms. BIOLOGY 2020; 9:biology9070177. [PMID: 32708065 PMCID: PMC7407403 DOI: 10.3390/biology9070177] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/15/2022]
Abstract
Cadmium (Cd) is one of the most toxic metals in the environment, and has noxious effects on plant growth and production. Cd-accumulating plants showed reduced growth and productivity. Therefore, remediation of this non-essential and toxic pollutant is a prerequisite. Plant-based phytoremediation methodology is considered as one a secure, environmentally friendly, and cost-effective approach for toxic metal remediation. Phytoremediating plants transport and accumulate Cd inside their roots, shoots, leaves, and vacuoles. Phytoremediation of Cd-contaminated sites through hyperaccumulator plants proves a ground-breaking and profitable choice to combat the contaminants. Moreover, the efficiency of Cd phytoremediation and Cd bioavailability can be improved by using plant growth-promoting bacteria (PGPB). Emerging modern molecular technologies have augmented our insight into the metabolic processes involved in Cd tolerance in regular cultivated crops and hyperaccumulator plants. Plants’ development via genetic engineering tools, like enhanced metal uptake, metal transport, Cd accumulation, and the overall Cd tolerance, unlocks new directions for phytoremediation. In this review, we outline the physiological, biochemical, and molecular mechanisms involved in Cd phytoremediation. Further, a focus on the potential of omics and genetic engineering strategies has been documented for the efficient remediation of a Cd-contaminated environment.
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93
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Zhang ZW, Dong YY, Feng LY, Deng ZL, Xu Q, Tao Q, Wang CQ, Chen YE, Yuan M, Yuan S. Selenium Enhances Cadmium Accumulation Capability in Two Mustard Family Species- Brassica napus and B. juncea. PLANTS 2020; 9:plants9070904. [PMID: 32709100 PMCID: PMC7412126 DOI: 10.3390/plants9070904] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 01/09/2023]
Abstract
Oilseed rape (Brassica napus) is a Cadmium (Cd) hyperaccumulator. However, high-level Cd at the early seedling stage seriously arrests the growth of rape, which limits its applications. Brassica juncea had higher Cd accumulation capacity, but its biomass was lower, also limiting its applications. Previous studies have confirmed that Selenium (Se) can alleviate Cd toxicity. However, the regulatory mechanism of Se in different valence states of Cd accumulation was unclear. In this study, we investigated the ameliorating effects of three Se valence states, Na2SeO4 [Se(VI)], Na2SeO3 [Se(IV)] and Se-Met [Se(II)], to Cd toxicity by physiological and biochemical approaches in hydroponically-cultured Brassica juncea and Brassica napus seedlings. Although Se treatments slightly inhibited seedling Cd concentration, it tripled or quadrupled the Cd accumulation level per plant, because dry weight increased about four times more with Se and Cd application than with Cd treatment alone. Among the different valence states of Se, Se(II) had the most marked effect on reducing Cd toxicity as evidenced by decreased growth inhibition and Cd content. The application of Se(II) was effective in reducing Cd-induced reactive oxygen species accumulation, and promoted the antioxidant enzyme activity and photosynthesis of both Brassica species. In addition, Se(II) treatment increased the concentrations of Cd in the cell wall and soluble fractions, but the Cd concentration in the organelle part was reduced.
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Affiliation(s)
- Zhong-Wei Zhang
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
| | - Yi-Ying Dong
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
| | - Ling-Yang Feng
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China;
| | - Zong-Lin Deng
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
| | - Qiang Xu
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
| | - Qi Tao
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
| | - Chang-Quan Wang
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
| | - Yang-Er Chen
- College of Life Science, Sichuan Agricultural University, Ya’an 625014, China; (Y.-E.C.); (M.Y.)
| | - Ming Yuan
- College of Life Science, Sichuan Agricultural University, Ya’an 625014, China; (Y.-E.C.); (M.Y.)
| | - Shu Yuan
- College of Life Science, Sichuan Agricultural University, Chengdu 611130, China; (Z.-W.Z.); (Y.-Y.D.); (Z.-L.D.); (Q.X.); (Q.T.); (C.-Q.W.)
- Correspondence: ; Tel.: +86-28-86291325
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94
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Wu Q, Huang L, Su N, Shabala L, Wang H, Huang X, Wen R, Yu M, Cui J, Shabala S. Calcium-Dependent Hydrogen Peroxide Mediates Hydrogen-Rich Water-Reduced Cadmium Uptake in Plant Roots. PLANT PHYSIOLOGY 2020; 183:1331-1344. [PMID: 32366640 PMCID: PMC7333692 DOI: 10.1104/pp.20.00377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 04/24/2020] [Indexed: 05/03/2023]
Abstract
Hydrogen gas (H2) has a possible signaling role in many developmental and adaptive plant responses, including mitigating the harmful effects of cadmium (Cd) uptake from soil. We used electrophysiological and molecular approaches to understand how H2 ameliorates Cd toxicity in pak choi (Brassica campestris ssp. chinensis). Exposure of pak choi roots to Cd resulted in a rapid increase in the intracellular H2 production. Exogenous application of hydrogen-rich water (HRW) resulted in a Cd-tolerant phenotype, with reduced net Cd uptake and accumulation. We showed that this is dependent upon the transport of calcium ions (Ca2+) across the plasma membrane and apoplastic generation of hydrogen peroxide (H2O2) by respiratory burst oxidase homolog (BcRbohD). The reduction in root Cd uptake was associated with the application of exogenous HRW or H2O2 This reduction was abolished in the iron-regulated transporter1 (Atirt1) mutant of Arabidopsis (Arabidopsis thaliana), and pak choi pretreated with HRW showed decreased BcIRT1 transcript levels. Roots exposed to HRW had rapid Ca2+ influx, and Cd-induced Ca2+ leakage was alleviated. Two Ca2+ channel blockers, gadolinium ion (Gd3+) and lanthanum ion (La3+), eliminated the HRW-induced increase in BcRbohD expression, H2O2 production, and Cd2+ influx inhibition. Collectively, our results suggest that the Cd-protective effect of H2 in plants may be explained by its control of the plasma membrane-based NADPH oxidase encoded by RbohD, which operates upstream of IRT1 and regulates root Cd uptake at both the transcriptional and functional levels. These findings provide a mechanistic explanation for the alleviatory role of H2 in Cd accumulation and toxicity in plants.
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Affiliation(s)
- Qi Wu
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Liping Huang
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lana Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Haiyang Wang
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Xin Huang
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Ruiyu Wen
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Min Yu
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Sergey Shabala
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
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95
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Zheng C, Aslam M, Liu X, Du H, Xie X, Jia H, Huang N, Tang K, Yang Y, Li P. Impact of Pb on Chlamydomonas reinhardtii at Physiological and Transcriptional Levels. Front Microbiol 2020; 11:1443. [PMID: 32676066 PMCID: PMC7333365 DOI: 10.3389/fmicb.2020.01443] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/04/2020] [Indexed: 12/13/2022] Open
Abstract
Trace elements stress is one of the most damaging abiotic stresses in environment. Nevertheless, the defense mechanism in microalgae remains poorly understood. In this study, physiological and molecular methods were performed to analyze the defense responses in green alga Chlamydomonas reinhardtii. It was speculated that the defense responses might mainly be due to the regulation of hormone signaling, indicating its potential role in alleviating the Pb toxicity besides other physiological and molecular defense responses like decrease in growth rate, chlorophyll content and photosynthesis efficiency, intensification of antioxidative mechanisms, regulation of transcription factors, trace elements chelation, and sequestration into vacuole via trace elements transporters. The sole differentially expressed ATP-binding cassette (ABC) transporters indicated that ABC transporters might play a very important role in the transport and relocation of Pb in C. reinhardtii. Additionally, our data provide the required knowledge for future investigations regarding Pb toxicity and defense mechanisms in algae, and detection of trace elements pollution in environment.
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Affiliation(s)
- Canqi Zheng
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Muhammad Aslam
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Xiaojuan Liu
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Hong Du
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Xihui Xie
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Haojie Jia
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Nan Huang
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Kaiming Tang
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Yingquan Yang
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Ping Li
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology and STU-UNIVPM Joint Algal Research Center, College of Sciences, Shantou University, Shantou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
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96
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Wang C, Zheng L, Tang Z, Sun S, Ma JF, Huang XY, Zhao FJ. OASTL-A1 functions as a cytosolic cysteine synthase and affects arsenic tolerance in rice. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3678-3689. [PMID: 32129444 DOI: 10.1093/jxb/eraa113] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 02/28/2020] [Indexed: 06/10/2023]
Abstract
Arsenic (As) contamination in paddy soil can cause phytotoxicity and elevated As accumulation in rice grains. Arsenic detoxification is closely linked to sulfur assimilation, but the genes involved have not been described in rice. In this study, we characterize the function of OASTL-A1, an O-acetylserine(thiol) lyase, in cysteine biosynthesis and detoxification of As in rice. Tissue expression analysis revealed that OsOASTL-A1 is mainly expressed in roots at the vegetative growth stage and in nodes at the reproductive stage. Furthermore, the expression of OsOASTL-A1 in roots was strongly induced by As exposure. Transgenic rice plants expressing pOsOASTL-A1::GUS (β-glucuronidase) indicated that OsOASTL-A1 was strongly expressed in the outer cortex and the vascular cylinder in the root mature zone. Subcellular localization using OsOASTL-A1:eGFP (enhanced green fluorescent protein) fusion protein showed that OsOASTL-A1 was localized to the cytosol. In vivo and in vitro enzyme activity assays showed that OsOASTL-A1 possessed the O-acetylserine(thiol) lyase activity. Knockout of OsOASTL-A1 led to significantly lower levels of cysteine, glutathione, and phytochelatins in roots and increased sensitivity to arsenate stress. Furthermore, the osoastl-a1 knockout mutants reduced As accumulation in the roots, but increased As accumulation in shoots. We conclude that OsOASTL-A1 is the cytosolic O-acetylserine(thiol) lyase that plays an important role in non-protein thiol biosynthesis in roots for As detoxification.
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Affiliation(s)
- Chengcheng Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Lihua Zheng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Zhong Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Shengkai Sun
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, Chuo, Kurashiki, Japan
| | - Xin-Yuan Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
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97
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Peng H, Wang Y, Tan TL, Chen Z. Exploring the phytoremediation potential of water hyacinth by FTIR Spectroscopy and ICP-OES for treatment of heavy metal contaminated water. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 22:939-951. [PMID: 32529840 DOI: 10.1080/15226514.2020.1774499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Toxic heavy metal pollution of water is a major environmental problem and the current remediation approaches are not optimal as they are non-eco-friendly and lacking in efficiency. As such phytoremediation, a green remediation technology is recognized as a better approach. In this study, both Fourier Transform Infrared (FTIR) Spectroscopy and Inductive Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) were used to investigate the capability of an aquatic plant, water hyacinth (Eichhornia crassipes) to remove heavy metals of lead, copper, cadmium and arsenic from aqueous solution at concentrations of 2 mg/L and 8 mg/L. Overall, the results showed that the uptake was rapid with the plants removing >80% of all the heavy metals at both concentrations. This uptake was proven by the detection of metal accumulation in plant tissues. Roots proved to be better accumulator than leaves. Maximum bioconcentration factor values indicating that the plant is a hyperaccumulator for lead and a moderate accumulator for the other heavy metals. Ligands such as O-H, C-O, C-C and C-H were found to aid the plant in accumulating heavy metal in its tissues. This study concludes that water hyacinth can be utilized as a phytoremediation agent to clean up heavy metal polluted water.
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Affiliation(s)
- Huiling Peng
- Natural Sciences and Science Education Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Yamin Wang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Tuck Lee Tan
- Natural Sciences and Science Education Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Zhong Chen
- Natural Sciences and Science Education Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
- M Grass International Institute of Smart Urban Greenology, Singapore, Singapore
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98
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Lyubun Y, Muratova A, Dubrovskaya E, Sungurtseva I, Turkovskaya O. Combined effects of cadmium and oil sludge on sorghum: growth, physiology, and contaminant removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:22720-22734. [PMID: 32323232 DOI: 10.1007/s11356-020-08789-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 04/06/2020] [Indexed: 05/22/2023]
Abstract
The physiological and biochemical responses of Sorghum bicolor (L.) Moench. to cadmium (Cd) (30 mg kg-1) and oil sludge (OS) (16 g kg-1) present in soil both separately and as a mixture were studied in pot experiments. The addition of oil sludge as a co-contaminant decreased Cd entry into the plant by almost 80% and simultaneously decreased the stimulation of superoxide dismutase (SOD) and peroxidase. The decrease in glutathione reductase (GR) activity and the increase in glutathione-S-transferase (GST) activity under the influence of oil sludge indicated that its components were detoxified by conjugation with glutathione. Cd additionally activated the antioxidant and detoxifying potential of the plant enzymatic response to stress. This helped to enhance the degradation rate of oil sludge in the rhizosphere, in which the participation of the root-released enzymes in the degradation could be possible. Cd increased the extent of soil clean-up from oil sludge, mainly owing to the elimination of paraffins, naphthenes, and mono- and bicyclic aromatic hydrocarbons. The mutual influence of the pollutants on the biochemical responses of sorghum and on soil clean-up was evaluated. The results are important for understanding the antistress and detoxification responses of the remediating plant to combined environmental pollution.
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Affiliation(s)
- Yelena Lyubun
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, Russia, 410049.
| | - Anna Muratova
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, Russia, 410049
| | - Ekaterina Dubrovskaya
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, Russia, 410049
| | - Irina Sungurtseva
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, Russia, 410049
| | - Olga Turkovskaya
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, Russia, 410049
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99
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Ismael MA, Elyamine AM, Moussa MG, Cai M, Zhao X, Hu C. Cadmium in plants: uptake, toxicity, and its interactions with selenium fertilizers. Metallomics 2020; 11:255-277. [PMID: 30632600 DOI: 10.1039/c8mt00247a] [Citation(s) in RCA: 251] [Impact Index Per Article: 62.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cd is the third major contaminant of greatest hazard to the environment after mercury and lead and is considered as the only metal that poses health risks to both humans and animals at plant tissue concentrations that are generally not phytotoxic. Cd accumulation in plant shoots depends on Cd entry through the roots, sequestration within root vacuoles, translocation in the xylem and phloem, and Cd dilution within the plant shoot throughout its growth. Several metal transporters, processes, and channels are involved from the first step of Cd reaching the root cells and until its final accumulation in the edible parts of the plant. It is hard to demonstrate one step as the pivotal factor to decide the Cd tolerance or accumulation ability of plants since the role of a specific transporter/process varies among plant species and even cultivars. In this review, we discuss the sources of Cd pollutants, Cd toxicity to plants, and mechanisms of Cd uptake and redistribution in plant tissues. The metal transporters involved in Cd transport within plant tissues are also discussed and how their manipulation can control Cd uptake and/or translocation. Finally, we discuss the beneficial effects of Se on plants under Cd stress, and how it can minimize or mitigate Cd toxicity in plants.
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Affiliation(s)
- Marwa A Ismael
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Trace Elements, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
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100
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Li D, Xiao S, Ma WN, Peng Z, Khan D, Yang Q, Wang X, Kong X, Zhang B, Yang E, Rengel Z, Wang J, Cui X, Chen Q. Magnesium reduces cadmium accumulation by decreasing the nitrate reductase-mediated nitric oxide production in Panax notoginseng roots. JOURNAL OF PLANT PHYSIOLOGY 2020; 248:153131. [PMID: 32203778 DOI: 10.1016/j.jplph.2020.153131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/15/2020] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
Panax notoginseng is a traditional medicinal herb in China. However, the high capacity of its roots to accumulate cadmium (Cd) poses a potential risk to human health. Our previous study showed that nitrate reductase (NR)-dependent nitric oxide (NO) production promoted Cd accumulation in P. notoginseng root cell walls. In this study, the role of Mg in the regulation of NO production and Cd accumulation in P. notoginseng roots was characterized. Exposure of P. notoginseng roots to increasing concentrations of Cd resulted in a linear increase in NO production. The application of 2 mM Mg for 24 h significantly alleviated Cd-induced NO production and Cd accumulation in roots, which coincided with a significant decrease in the NR activity. Western analysis suggested that Mg increased the interaction between the 14-3-3 protein and NR, which might have been a reason for the Mg-mediated decrease in NR activity and NO production under Cd stress. These results suggested that Mg-mediated alleviation of Cd-induced NO production and Cd accumulation is achieved by enhancement of the interaction between the 14-3-3 protein and NR in P. notoginseng roots.
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Affiliation(s)
- Dongxu Li
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Shuhui Xiao
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Wen-Na Ma
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Zhongping Peng
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Dawood Khan
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Qian Yang
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Xinxun Wang
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Xiangying Kong
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China; Faculty of Architecture and City Planning, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Baige Zhang
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 501640, China
| | - En Yang
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Zed Rengel
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Jianmin Wang
- Yunnan Rural Science and Technology Service Center, Kunming, 650021, China
| | - Xiuming Cui
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China
| | - Qi Chen
- Yunnan Provincial Key Laboratory of Panax notoginseng, Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Road, Kunming, 650500, China.
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