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Khan IU, Qi SS, Gul F, Manan S, Rono JK, Naz M, Shi XN, Zhang H, Dai ZC, Du DL. A Green Approach Used for Heavy Metals 'Phytoremediation' Via Invasive Plant Species to Mitigate Environmental Pollution: A Review. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12040725. [PMID: 36840073 PMCID: PMC9964337 DOI: 10.3390/plants12040725] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/28/2023] [Accepted: 02/02/2023] [Indexed: 05/27/2023]
Abstract
Heavy metals (HMs) normally occur in nature and are rapidly released into ecosystems by anthropogenic activities, leading to a series of threats to plant productivity as well as human health. Phytoremediation is a clean, eco-friendly, and cost-effective method for reducing soil toxicity, particularly in weedy plants (invasive plant species (IPS)). This method provides a favorable tool for HM hyperaccumulation using invasive plants. Improving the phytoremediation strategy requires a profound knowledge of HM uptake and translocation as well as the development of resistance or tolerance to HMs. This review describes a comprehensive mechanism of uptake and translocation of HMs and their subsequent detoxification with the IPS via phytoremediation. Additionally, the improvement of phytoremediation through advanced biotechnological strategies, including genetic engineering, nanoparticles, microorganisms, CRISPR-Cas9, and protein basis, is discussed. In summary, this appraisal will provide a new platform for the uptake, translocation, and detoxification of HMs via the phytoremediation process of the IPS.
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Affiliation(s)
- Irfan Ullah Khan
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shan-Shan Qi
- School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Farrukh Gul
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Sehrish Manan
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Justice Kipkorir Rono
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Misbah Naz
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xin-Ning Shi
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Haiyan Zhang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
- School of Inspection and Testing Certificate, Changzhou Vocational Institute Engineering, Changzhou 213164, China
| | - Zhi-Cong Dai
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Dao-Lin Du
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
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Singh A, Basnal N, Shukla G, Chaudhary N, Singh S, Gaurav SS. Evaluation of efficacy of Phyto-synthesized iron oxide nanoparticles in contributing drought resilience in wheat ( Triticum aestivumL.). NANOTECHNOLOGY 2022; 33:485101. [PMID: 36001941 DOI: 10.1088/1361-6528/ac8c48] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Wheat is the majorly cultivated staple crop worldwide. The world witnesses a great percentage of yield loss of wheat due to drought stress. The present study aimed at evaluating the efficacy of phytosynthesized iron oxide nanoparticles (FeONPs) in contributing to drought resilience in wheat (Triticum aestivumL.) under rain-fed conditions. FeONPs were biosynthesized by using leaf extract ofProsopis cinerariaas a reducing and capping agent. The synthesized nanoparticles were characterized to evaluate the structural and biochemical aspects. The FeONPs were found to be irregularly spherical in shape with a mean size of 42.6 nm. The concentration of nanoparticles in the sample was found to be 164.01 mg l-1. An experimental setup was laid out in a randomized-plot design with 3 replications for Rabi season 2020-2021. Five dosages of nanoparticles were prepared as 12.5, 25, 50, 75 and 100 ppm from the stock solution. The wheat crop varieties grown in the field were subjected to a total of 3 treatments; Nanopriming, foliar application of FeONPs at seedling development stage (20 DAS), and tillering stage (30 DAS). Plants that were not treated with NPs were considered as control. No irrigation regime was followed as the effect of NPs on the crop was to be assessed under rain-fed conditions only. Plant growth parameters were recorded. The obtained results revealed that the application of FeONPs positively affected all the morphological and yield attributes in the wheat crop. The highest concentrations used were found to be most effective and showed a significantly pronounced effect as compared to the control atp≤ 0.05. The study concluded that the FeONPs can contribute to drought resilience in wheat.
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Affiliation(s)
- Amardeep Singh
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut (UP), India
| | - Namita Basnal
- Department of Biotechnology, Chaudhary Charan Singh University, Meerut (UP), India
| | - Gyanika Shukla
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut (UP), India
| | - Neha Chaudhary
- Department of Biotechnology, Chaudhary Charan Singh University, Meerut (UP), India
| | - Swati Singh
- Department of Biotechnology, Chaudhary Charan Singh University, Meerut (UP), India
| | - Shailendra Singh Gaurav
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut (UP), India
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Abstract
Wastelands of the mining industry are among the largest of disturbed areas that demand revitalization. To reduce environmental impact and to better manage these geo-resources, the formation of sustainable plant and soil complexes and the restoration of self-recovery soil function are critical points. The successful return of vegetative cover at post-mining sites requires eliminating the deficiency of organic matter. For this, we assessed the usability of non-traditional ameliorants to provide a better understanding of benefits from mutual dependencies of environmental resources. To prevent losses and to close resource cycles, we studied the applicability of wastewater sludge from the pulp and paper (SPP) industry as an amendment to counteract soil degradation and rehabilitate human-disturbed lands. Waste rock limestone, beresite, and phosphogypsum substrates of post-mining sites were used in vitro for the application of sludge and peat mixture and consequent grass seeding. The formed vegetative cover was analyzed to compare the germination and biomass growth on reconstructed soils. We assessed the efficiency of ameliorant combinations by two approaches: (1) the traditional technique of cutting-off plant material to measure the obtained plant biomass, and, (2) digital image analysis for RGB-processed photographs of the vegetative cover (r2 = 0.75–0.95). The effect of SPP on plant cover biomass and grass height showed similar results: land rehabilitation with the formation of a 20 cm soil layer on mine waste dumps was environmentally suitable with an SPP:soil ratio of 1:3. However, excessive application (ratio 1:1 of SPP to the soil) negatively affected seed germination and plant vegetation.
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Arshad M, Awais M, Bashir R, Ahmad SR, Anwar-ul-Haq M, Senousy HH, Iftikhar M, Anjum MU, Ramzan S, Alharbi SA, Bárek V, Brestic M, Noman A. Assessment of wheat productivity responses and soil health dynamics under brackish ground water. Saudi J Biol Sci 2022; 29:793-803. [PMID: 35197746 PMCID: PMC8848132 DOI: 10.1016/j.sjbs.2021.11.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/06/2021] [Accepted: 11/11/2021] [Indexed: 11/24/2022] Open
Abstract
The continuous use of brackish groundwater for irrigation is detrimental for soil and crop attributes. A three-year research study was designed for the wheat crop to assess the effects of brackish groundwater on crop yield and soil health under a surface irrigation system. Three sites were selected in different cropping zones of Pakistan. The treatments comprised of irrigation with moderately brackish water having 0.8, 1.3 & 2.7 dSm−1 of salinity and canal water. The results indicated that EC, SAR, bicarbonates, Ca2+ and Mg2+ levels increased in the soil for consecutive years and this increase was more at site S3 followed by S2 and S1. As soil depth is concerned, the increase was more pronounced in upper layers of soil (0–15 cm) as compared to 15–30 cm depth. Growth and yield were also affected by the consecutive use of this water, the number of plants, plant height, the number of spikes per plant, and yield was reduced at all the three sites. However, the impact was less pronounced at the site S1 whereas S3 was the most affected one. Grain weight and dry matter weight were observed to be maximum at S1. Water productivity was also calculated for all the three sites. Maximum water productivity was observed at S1 followed by S2 & S3. It was concluded that the continuous use of brackish water would have an adverse effect on crop yield and subsequently, soil health is also affected by it significantly.
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Affiliation(s)
- Muhammad Arshad
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Awais
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
- College of Earth & Environmental Sciences, University of the Punjab, Lahore, Pakistan
- Corresponding authors at: Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan (M. Awais).
| | - Rohina Bashir
- Department of Botany, Government College University Faisalabad, Pakistan
| | - Sajid Rashid Ahmad
- College of Earth & Environmental Sciences, University of the Punjab, Lahore, Pakistan
| | - Muhammad Anwar-ul-Haq
- Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Hoda H. Senousy
- Botany and Microbiology Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Maryam Iftikhar
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Umair Anjum
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
| | - Shahid Ramzan
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
| | - Sulaiman Ali Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box -2455, Riyadh 11451, Saudi Arabia
| | - Viliam Bárek
- Institute of Landscape Engineering, Slovak University of Agriculture, Nitra, Slovakia
| | - Marian Brestic
- Institute of Plant and Environmental Sciences, Slovak University of Agriculture, Nitra, Slovakia
| | - Ali Noman
- Department of Botany, Government College University Faisalabad, Pakistan
- Corresponding authors at: Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan (M. Awais).
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El-Shahir AA, El-Tayeh NA, Ali OM, Abdel Latef AAH, Loutfy N. The Effect of Endophytic Talaromyces pinophilus on Growth, Absorption and Accumulation of Heavy Metals of Triticum aestivum Grown on Sandy Soil Amended by Sewage Sludge. PLANTS (BASEL, SWITZERLAND) 2021; 10:2659. [PMID: 34961130 PMCID: PMC8704920 DOI: 10.3390/plants10122659] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/22/2021] [Accepted: 11/29/2021] [Indexed: 05/24/2023]
Abstract
Sewage sludge improves agricultural soil and plant growth, but there are risks associated with its use, including high heavy metal content. In this study, experiments were carried out to investigate the role of endophytic Talaromyces pinophilus MW695526 on the growth of Triticum aestivum cultivated in soil amended with sewage sludge and its phytoremediation ability. T. pinophilus could produce gibberellic acid (GA) and stimulate T. aestivum to accumulate GA. The results showed that inoculation with T. pinophilus boosted plant growth criteria, photosynthetic pigments, osmolytes (soluble proteins, soluble sugars and total amino acids), enzymatic antioxidants (catalase, superoxide dismutase and peroxidase), K, Ca and Mg. On the other hand, it reduced Na, Na/K ratio, Cd, Ni, Cu and Zn in the growth media as well as in the shoot and root of T. aestivum. The results suggest that endophytic T. pinophilus can work as a barrier to reduce the absorption of heavy metals in T. aestivum cultivated in soil amended with sewage sludge.
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Affiliation(s)
- Amany A. El-Shahir
- Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena 83523, Egypt; (N.A.E.-T.); (N.L.)
| | - Noha A. El-Tayeh
- Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena 83523, Egypt; (N.A.E.-T.); (N.L.)
| | - Omar M. Ali
- Department of Chemistry, Turabah University College, Turabah Branch, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Arafat Abdel Hamed Abdel Latef
- Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena 83523, Egypt; (N.A.E.-T.); (N.L.)
| | - Naglaa Loutfy
- Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena 83523, Egypt; (N.A.E.-T.); (N.L.)
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Khan AHA, Kiyani A, Mirza CR, Butt TA, Barros R, Ali B, Iqbal M, Yousaf S. Ornamental plants for the phytoremediation of heavy metals: Present knowledge and future perspectives. ENVIRONMENTAL RESEARCH 2021; 195:110780. [PMID: 33539835 DOI: 10.1016/j.envres.2021.110780] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 05/22/2023]
Abstract
Environmental matrices are polluted with the plethora of contaminants, and among these, the concerns related to heavy metals (HMs) are also included. Due to the low cost in a long-term application and environmental friendliness, the use of biological remediation has gained significant attention in recent decades. The use of ornamental plants (OPs) in the field of phytoremediation is scarcely reported, and the impacts of HMs on OPs have also not been investigated in great depth. The OPs mediated HMs remediation can simultaneously remove contaminants and bring improvement in aesthetics of the site. The biomass of OPs produced after such activities can be used and sold as pot plants, cut flowers, essential oils, perfumes, air fresheners production, metal phytomining, and feedstock in silk production. The OPs also present a lower risk of HMs bioaccumulation compared to crop plants. This review focuses on the current knowledge of HMs toxicity to OPs, their applicability advantages, methods to improve the tolerance of OPs with incremented HMs uptake, challenges in the field, and future application perspectives. The case studies realted to practical application of OPs, from China, Iran, India, Oman, Pakistan, and Turkey, were also discussed. This work fetches the inter-disciplinary features and understanding for the sustainable treatment of HMs in a new novel way, to which no previous review has focused.
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Affiliation(s)
- Aqib Hassan Ali Khan
- Department of Earth & Environmental Sciences, Bahria University (Karachi Campus), Karachi, 75260, Pakistan; Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
| | - Amna Kiyani
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan; Department of Biosciences, COMSATS University Islamabad, Islamabad Campus, Islamabad, 45550, Pakistan
| | - Cyrus Raza Mirza
- Department of Civil Engineering, College of Engineering, University of Hail, Hail, Saudi Arabia
| | - Tayyab Ashfaq Butt
- Department of Civil Engineering, College of Engineering, University of Hail, Hail, Saudi Arabia
| | - Rocío Barros
- International Research Center in Critical Raw Materials and Advanced Industrial Technologies, Universidad de Burgos, Burgos, 09001, Spain
| | - Basit Ali
- Department of Economics, COMSATS University Islamabad, Islamabad Campus, Islamabad, 45550, Pakistan
| | - Mazhar Iqbal
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan.
| | - Sohail Yousaf
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan.
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Multivariate Analysis for Assessing Irrigation Water Quality: A Case Study of the Bahr Mouise Canal, Eastern Nile Delta. WATER 2020. [DOI: 10.3390/w12092537] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Water scarcity and suitable irrigation water management in arid regions represent tangible challenges for sustainable agriculture. The current study aimed to apply multivariate analysis and to develop a simplified water quality assessment using principal component analysis (PCA) and the agglomerative hierarchical clustering (AHC) technique to assess the water quality of the Bahr Mouise canal in El-Sharkia Governorate, Egypt. The proposed methods depended on the monitored water chemical composition (e.g., pH, water electrical conductivity (ECiw), Ca2+, Mg2+, Na+, K+, HCO3−, Cl−, and SO42−) during 2019. Based on the supervised classification of satellite images (Landsat 8 Operational Land Imager (OLI)), the distinguished land use/land cover types around the Bahr Mouise canal were agriculture, urban, and water bodies, while the dominating land use was agriculture. The water quality of the Bahr Mouise canal was classified into two classes based on the application of the irrigation water quality index (IWQI), while the water quality was classified into three classes using the PCA and AHC methods. Temporal variations in water quality were investigated, where the water qualities in winter, autumn, and spring (January, February, March, April, November, and December) were classified as class I (no restrictions) based on IWQI application, and the water salinity, sodicity, and/or alkalinity did not represent limiting factors for irrigation water quality. On the other hand, in the summer season (May, June, July, August, and October), the irrigation water was classified as class II (low restrictions); therefore, irrigation processes during summer may lead to an increase in the alkalinity hazard. The PCA classifications were compared with the IWQI results; the PCA classifications had similar assessment results during the year, except in September, while the water quality was assigned to class II using the PCA method and class I by applying the IWQI. Furthermore, the normalized difference vegetation index (NDVI) around the Bahr Mouise canal over eight months and climatic data assisted in explaining the fluctuations in water quality during 2019 as a result of changing the crop season and agriculture management. Assessments of water quality help to conserve soil, reduce degradation risk, and support decision makers in order to obtain sustainable agriculture, especially under water irrigation scarcity and the limited agricultural land in such an arid region.
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Ji S, Gao L, Chen W, Su J, Shen Y. Urea application enhances cadmium uptake and accumulation in Italian ryegrass. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:34421-34433. [PMID: 32557021 DOI: 10.1007/s11356-020-09691-3] [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: 02/21/2020] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
Italian ryegrass (Lolium multifolorum Lam.) has a potential phytoextraction capacity for cadmium (Cd), which is considered as the most toxic heavy metal (HM) pollutant in the farmland. The promotion effect of urea application on Italian ryegrass growth has been clarified, while it is not clear whether and how urea application affects Cd accumulation in Italian ryegrass under Cd stress. A 2-year pot experiment was conducted to investigate the effect of urea application on Cd accumulation and related mechanisms by uptake inhibition and kinetics experiments. The results showed that both shoot biomass and Cd concentration under Cd stress were increased by up to 213.37% and 84.74% in 2016 and 38.15% and 47.11% in 2017 after urea application, respectively. The shoot Cd accumulation reached maximum value (910.23 and 630.09 μg pot-1 in 2016 and 2017, respectively) at the level of 300 kg ha-1 urea. Superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activities were significantly increased by urea application. Compared with control group, urea application significantly improved inhibition ratio of 2, 4-dinitrophenol (DNP) rather than LaCl3 and Ca2+. Cadmium uptake kinetics experiment showed that urea application significantly decreased the Km value and improved the α value (P < 0.01), but no significant effect on the Vmax value (P > 0.05). In conclusion, we proposed that the higher affinity to Cd2+ of the membrane transporter after urea application promoted the active uptake of Cd, which contributed to the effective Cd accumulation capacity in Italian ryegrass.
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Affiliation(s)
- Shuren Ji
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Limin Gao
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Wei Chen
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jing Su
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Yixin Shen
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
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Nouman W, Bashir T, Gul R, Gull T, Olson ME, Shaheen M, Rosa E, Domínguez-Perles R, Soliman WS. Metalliferous conditions induce regulation in antioxidant activities, polyphenolics and nutritional quality of Moringa oleifera L. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 22:1348-1361. [PMID: 32538124 DOI: 10.1080/15226514.2020.1775547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Moringa oleifera L. was grown under cadmium and lead stress conditions and the variations in its mineral content, polyphenolics, and antioxidant activities were studied and how these heavy metals affect plant growth and development. In this study, the metal translocation factor was found <1 which indicates more metal accumulation in moringa roots than stem. A significant increase in enzymatic and non-enzymatic antioxidant activities was observed in leaves, stem, and roots under metal stress which shows moringa can withstand under metalliferous conditions by regulating its antioxidant system. Various parts of moringa plants exhibited good nutritional quality; even significant variation was recorded in nutritional attributes. A significant variation was also noted in the expression of polyphenolics in moringa stem, roots, and leaves which are indicators of plant defense system under abiotic stress conditions. The results of the present study clearly manifest that the nutritional quality and concentration of polyphenolics in moringa plants are least affected by cadmium and lead uptake. These findings suggested the cultivation of moringa plants on cadmium and lead affected soils which cannot only remediate soil metalliferous conditions but can also provide nutritious fodder for livestock. For better understanding of the involved mechansisms, there is need to study the genes which are associated with moringa tolerance under metalliferous conditions.
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Affiliation(s)
- Wasif Nouman
- Department of Forestry & Range Management, Bahauddin Zakariya University, Multan, Pakistan
| | - Tehmeena Bashir
- Department of Forestry & Range Management, Bahauddin Zakariya University, Multan, Pakistan
| | - Rehman Gul
- Soil and Water Testing Laboratory for Research, Lahore, Pakistan
| | - Tehseen Gull
- Department of Chemistry, University of Central Punjab, Lahore, Pakistan
| | - Mark E Olson
- Instituto de Biología, Universidad Nacional Autónoma de México, México, Mexico
| | - Mehak Shaheen
- Department of Forestry and Range Management, University of Agriculture Faisalabad, Pakistan
| | - Eduardo Rosa
- Centre for the Research and Technology for Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro (CITAB/UTAD), Vila Real, Portugal
| | - Raúl Domínguez-Perles
- Centro de Edafología y Biología Aplicada del Segura, National Council for Scientific Research (CEBAS-CSIC), Espinardo, Spain
| | - Wagdi Sabir Soliman
- Faculty of Agriculture and Natural Resources, Department of Horticulture, Aswan University, Aswan, Egypt
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Cadmium Hyperaccumulation and Translocation in Impatiens Glandulifera: From Foe to Friend? SUSTAINABILITY 2019. [DOI: 10.3390/su11185018] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The use of phytoremediation to sustainably recover areas contaminated by toxic heavy metals such as cadmium (Cd) has been made feasible since the discovery of hyperaccumulator plants. This study examines the potential of the invasive Impatiens glandulifera for phytoremediation propensity of Cd. In these experiments, the plants were exposed to and tested for Cd accumulation; the propensity to accumulate other heavy metals, such as Zinc, was not investigated. The efficacy of phytoaccumulation was assessed over two trials (Cd concentrations of 20 mg/kg to 150 mg/kg) via examination of bioconcentration factor (BCF), translocation factor (TF), and total removal (TR). Exposure to Cd levels of up to 150 mg/kg in the trials did not affect the biomass of the plants compared to the control. Impatiens glandulifera accumulated cadmium at a rate of 276 to 1562 mg/kgin stems, with BCFs, TFs, and TRs of 64.6 to 236.4, 0.2 to 1.2, and 3.6 to 29.2 mg Cd, respectively. In vitro germination revealed unprecedented germination ability, demonstrating the remarkable hypertolerance of I. glandulifera, with no significant difference in the germination of seedlings exposed to 1000 mg/kg Cd compared to the control. This study also examined the localization of Cd in plant tissues via a histochemical assay using dithizone. The results presented herein suggest that I. glandulifera can act as a hyperaccumulator of Cd for phytoremediation.
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