1
|
Jha A, Barsola B, Pathania D, Sonu, Raizada P, Thakur P, Singh P, Rustagi S, Khosla A, Chaudhary V. Nano-biogenic heavy metals adsorptive remediation for enhanced soil health and sustainable agricultural production. ENVIRONMENTAL RESEARCH 2024; 252:118926. [PMID: 38657848 DOI: 10.1016/j.envres.2024.118926] [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: 12/11/2023] [Revised: 04/04/2024] [Accepted: 04/11/2024] [Indexed: 04/26/2024]
Abstract
Hazardous heavy metal (HM) pollution constitutes a pervasive global challenge, posing substantial risks to ecosystems and human health. The exigency for expeditious detection, meticulous monitoring, and efficacious remediation of HM within ecosystems is indisputable. Soil contamination, stemming from a myriad of anthropogenic activities, emerges as a principal conduit for HM ingress into the food chain. Traditional soil remediation modalities for HM elimination, while effective are labor-intensive, susceptible to secondary contamination, and exhibit limited efficacy in regions characterized by low metal toxicity. In response to these exigencies, the eco-friendly paradigm of bioremediation has garnered prominence as a financially judicious and sustainable remedial strategy. This approach entails the utilization of hyperaccumulators, Genetically Modified Microorganisms (GMM), and advantageous microbes. The current review offers a comprehensive elucidation of cutting-edge phyto/microbe-based bioremediation techniques, with a specific emphasis on their amalgamation with nanotechnology. Accentuating their pivotal role in advancing sustainable agricultural practices, the review meticulously dissects the synergistic interplay between plants and microbes, underscoring their adeptness in HM remediation sans secondary contamination. Moreover, the review scrutinizes the challenges intrinsic to implementing bioremediation-nanotechnology interface techniques and propounds innovative resolutions. These discernments proffer auspicious trajectories for the future of agriculture. Through the environmentally conscientious marvels of phyto/microbe bioremediation, an optimistic outlook emerges for environmental preservation and the cultivation of a sustainable, salubrious planet via the conduit of cleaner agricultural production.
Collapse
Affiliation(s)
- Ayush Jha
- University Institute of Biotechnology, Chandigarh University, Gharuan, Punjab, 140413, India
| | - Bindiya Barsola
- School of Biological and Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, India
| | - Diksha Pathania
- Department of Biosciences and Technology, MMEC, Maharishi Markandeshwar University, Mullana (Ambala), Haryana,133203, India
| | - Sonu
- School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India.
| | - Pankaj Raizada
- School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India
| | - Pankaj Thakur
- Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Pardeep Singh
- School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India
| | - Sarvesh Rustagi
- School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Ajit Khosla
- Department of Applied Chemistry, School of Advanced Materials and Nanotechnology, Xidian University, Xi'an, 710126, PR China.
| | - Vishal Chaudhary
- Physics Department, Bhagini Nivedita College, University of Delhi, Delhi, India; Centre for Research Impact & Outcome, Chitkara University, Punjab, 140401, India.
| |
Collapse
|
2
|
Bai X, Bol R, Chen H, Cui Q, Qiu T, Zhao S, Fang L. A meta-analysis on crop growth and heavy metals accumulation with PGPB inoculation in contaminated soils. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134370. [PMID: 38688214 DOI: 10.1016/j.jhazmat.2024.134370] [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: 01/14/2024] [Revised: 04/08/2024] [Accepted: 04/18/2024] [Indexed: 05/02/2024]
Abstract
Plant growth-promoting bacteria (PGPB) offer a promising solution for mitigating heavy metals (HMs) stress in crops, yet the mechanisms underlying the way they operate in the soil-plant system are not fully understood. We therefore conducted a meta-analysis with 2037 observations to quantitatively evaluate the effects and determinants of PGPB inoculation on crop growth and HMs accumulation in contaminated soils. We found that inoculation increased shoot and root biomass of all five crops (rice, maize, wheat, soybean, and sorghum) and decreased metal accumulation in rice and wheat shoots together with wheat roots. Key factors driving inoculation efficiency included soil organic matter (SOM) and the addition of exogenous fertilizers (N, P, and K). The phylum Proteobacteria was identified as the keystone taxa in effectively alleviating HMs stress in crops. More antioxidant enzyme activity, photosynthetic pigment, and nutrient absorption were induced by it. Overall, using PGPB inoculation improved the growth performance of all five crops, significantly increasing crop biomass in shoots, roots, and grains by 33 %, 35 %, and 20 %, respectively, while concurrently significantly decreasing heavy metal accumulation by 16 %, 9 %, and 37 %, respectively. These results are vital to grasping the benefits of PGPB and its future application in enhancing crop resistance to HMs.
Collapse
Affiliation(s)
- Xiaohan Bai
- College of Soil and Water Conservation Science and Engineering, Northwest A&F University, 712100 Yangling, China
| | - Roland Bol
- Institute of Bio‑ and Geosciences, Agrosphere (IBG-3), Forschungszentrum Jülich, Wilhelm Johnen Str, 52425 Jülich, Germany
| | - Hansong Chen
- College of Xingzhi, Zhejiang Normal University, Jinhua 321000, China
| | - Qingliang Cui
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, 712100 Yangling, China
| | - Tianyi Qiu
- College of Natural Resources and Environment, Northwest A&F University, 712100 Yangling, China
| | - Shuling Zhao
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, 712100 Yangling, China
| | - Linchuan Fang
- College of Soil and Water Conservation Science and Engineering, Northwest A&F University, 712100 Yangling, China; Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, 430070 Wuhan, China.
| |
Collapse
|
3
|
Sanjana S, Jazeel K, Janeeshma E, Nair SG, Shackira AM. Synergistic interactions of assorted ameliorating agents to enhance the potential of heavy metal phytoremediation. STRESS BIOLOGY 2024; 4:13. [PMID: 38363436 PMCID: PMC10873264 DOI: 10.1007/s44154-024-00153-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 01/29/2024] [Indexed: 02/17/2024]
Abstract
Pollution by toxic heavy metals creates a significant impact on the biotic community of the ecosystem. Nowadays, a solution to this problem is an eco-friendly approach like phytoremediation, in which plants are used to ameliorate heavy metals. In addition, various amendments are used to enhance the potential of heavy metal phytoremediation. Symbiotic microorganisms such as phosphate-solubilizing bacteria (PSB), endophytes, mycorrhiza and plant growth-promoting rhizobacteria (PGPR) play a significant role in the improvement of heavy metal phytoremediation potential along with promoting the growth of plants that are grown in contaminated environments. Various chemical chelators (Indole 3-acetic acid, ethylene diamine tetra acetic acid, ethylene glycol tetra acetic acid, ethylenediamine-N, N-disuccinic acid and nitrilotri-acetic acid) and their combined action with other agents also contribute to heavy metal phytoremediation enhancement. With modern techniques, transgenic plants and microorganisms are developed to open up an alternative strategy for phytoremediation. Genomics, proteomics, transcriptomics and metabolomics are widely used novel approaches to develop competent phytoremediators. This review accounts for the synergistic interactions of the ameliorating agent's role in enhancing heavy metal phytoremediation, intending to highlight the importance of these various approaches in reducing heavy metal pollution.
Collapse
Affiliation(s)
- S Sanjana
- Department of Botany, Sir Syed College, Kannur University, Kerala, 670142, India
| | - K Jazeel
- Department of Botany, Sir Syed College, Kannur University, Kerala, 670142, India
| | - E Janeeshma
- Department of Botany, MES KEVEEYAM College, Valanchery, Malappuram, Kerala, India
| | - Sarath G Nair
- Department of Botany, Mar Athanasius College, Mahatma Gandhi University, Kottayam, Kerala, India
| | - A M Shackira
- Department of Botany, Sir Syed College, Kannur University, Kerala, 670142, India.
| |
Collapse
|
4
|
Wang Q, Zhou YM, Xing CY, Li WC, Shen Y, Yan P, Guo JS, Fang F, Chen YP. Encapsulins from Ca. Brocadia fulgida: An effective tool to enhance the tolerance of engineered bacteria (pET-28a-cEnc) to Zn 2. JOURNAL OF HAZARDOUS MATERIALS 2022; 435:128954. [PMID: 35462189 DOI: 10.1016/j.jhazmat.2022.128954] [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: 12/23/2021] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
Zn2+ is largely discharged from many industries and poses a severe threat to the environment, making its remediation crucial. Encapsulins, proteinaceous nano-compartments, may protect cells against environmental stresses by sequestering toxic substances. To determine whether hemerythrin-containing encapsulins (cEnc) from anammox bacteria Ca. Brocadia fulgida can help cells deal with toxic substances such as Zn2+, we transferred cEnc into E.coli by molecular biology technologies for massive expression and then cultured them in media with increasing Zn2+ levels. The engineered bacteria (with cEnc) grew better and entered the apoptosis phase later, while wild bacteria showed poor survival. Furthermore, tandem mass tag-based quantitative proteomic analysis was used to reveal the underlying regulatory mechanism by which the genetically-engineered bacteria (with cEnc) adapted to Zn2+ stress. When Zn2+ was sequestered in cEnc as a transition, the engineered bacteria presented a complex network of regulatory systems against Zn2+-induced cytotoxicity, including functions related to ribosomes, sulfur metabolism, flagellar assembly, DNA repair, protein synthesis, and Zn2+ efflux. Our findings offer an effective and promising stress control strategy to enhance the Zn2+ tolerance of bacteria for Zn2+ remediation and provide a new application for encapsulins.
Collapse
Affiliation(s)
- Que Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Yue-Ming Zhou
- National Base of International Science and Technology Cooperation for Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing 400067, China
| | - Chong-Yang Xing
- Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligence Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Wen-Chao Li
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Yu Shen
- National Base of International Science and Technology Cooperation for Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing 400067, China
| | - Peng Yan
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Jin-Song Guo
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Fang Fang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - You-Peng Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China.
| |
Collapse
|
5
|
Raklami A, Meddich A, Oufdou K, Baslam M. Plants-Microorganisms-Based Bioremediation for Heavy Metal Cleanup: Recent Developments, Phytoremediation Techniques, Regulation Mechanisms, and Molecular Responses. Int J Mol Sci 2022; 23:5031. [PMID: 35563429 PMCID: PMC9105715 DOI: 10.3390/ijms23095031] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/25/2022] [Accepted: 04/28/2022] [Indexed: 02/01/2023] Open
Abstract
Rapid industrialization, mine tailings runoff, and agricultural activities are often detrimental to soil health and can distribute hazardous metal(loid)s into the soil environment, with harmful effects on human and ecosystem health. Plants and their associated microbes can be deployed to clean up and prevent environmental pollution. This green technology has emerged as one of the most attractive and acceptable practices for using natural processes to break down organic contaminants or accumulate and stabilize metal pollutants by acting as filters or traps. This review explores the interactions between plants, their associated microbiomes, and the environment, and discusses how they shape the assembly of plant-associated microbial communities and modulate metal(loid)s remediation. Here, we also overview microbe-heavy-metal(loid)s interactions and discuss microbial bioremediation and plants with advanced phytoremediation properties approaches that have been successfully used, as well as their associated biological processes. We conclude by providing insights into the underlying remediation strategies' mechanisms, key challenges, and future directions for the remediation of metal(loid)s-polluted agricultural soils with environmentally friendly techniques.
Collapse
Affiliation(s)
- Anas Raklami
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco; (A.R.); (K.O.)
| | - Abdelilah Meddich
- Center of Agrobiotechnology and Bioengineering, Research Unit Labelled CNRST (Centre Agro-Biotech URL-CNRST-05), “Physiology of Abiotic Stresses” Team, Cadi Ayyad University, Marrakesh 40000, Morocco;
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco; (A.R.); (K.O.)
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan
| |
Collapse
|
6
|
Roszak M, Jabłońska J, Stachurska X, Dubrowska K, Kajdanowicz J, Gołębiewska M, Kiepas-Kokot A, Osińska B, Augustyniak A, Karakulska J. Development of an Autochthonous Microbial Consortium for Enhanced Bioremediation of PAH-Contaminated Soil. Int J Mol Sci 2021; 22:13469. [PMID: 34948267 PMCID: PMC8708151 DOI: 10.3390/ijms222413469] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 12/08/2021] [Accepted: 12/13/2021] [Indexed: 11/26/2022] Open
Abstract
The main objectives of this study were to isolate bacteria from soil chronically contaminated with polycyclic aromatic hydrocarbons (PAHs), develop an autochthonous microbial consortium, and evaluate its ability to degrade PAHs in their native contaminated soil. Strains with the best bioremediation potential were selected during the multi-stage isolation process. Moreover, to choose bacteria with the highest bioremediation potential, the presence of PAH-degrading genes (pahE) was confirmed and the following tests were performed: tolerance to heavy metals, antagonistic behavior, phytotoxicity, and antimicrobial susceptibility. In vitro degradation of hydrocarbons led to the reduction of the total PAH content by 93.5% after the first day of incubation and by 99.22% after the eighth day. Bioremediation experiment conducted in situ in the contaminated area resulted in the average reduction of the total PAH concentration by 33.3% after 5 months and by over 72% after 13 months, compared to the concentration recorded before the intervention. Therefore, this study implicates that the development of an autochthonous microbial consortium isolated from long-term PAH-contaminated soil has the potential to enhance the bioremediation process.
Collapse
Affiliation(s)
- Marta Roszak
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
- Department of Laboratory Medicine, Pomeranian Medical University in Szczecin, Al. Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland
| | - Joanna Jabłońska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
- Department of Chemical and Process Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Al. Piastów 42, 71-065 Szczecin, Poland
| | - Xymena Stachurska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
| | - Kamila Dubrowska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
- Department of Chemical and Process Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Al. Piastów 42, 71-065 Szczecin, Poland
| | - Justyna Kajdanowicz
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
| | - Marta Gołębiewska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
| | - Anna Kiepas-Kokot
- Department of Environmental Management, Faculty of Environmental Management and Agriculture, West Pomeranian University of Technology in Szczecin, ul. Słowackiego 17, 71-434 Szczecin, Poland;
| | - Beata Osińska
- Research Institute of Animal Production PIB Kołbacz Sp. z o.o., Warcisława Street 1, 74-106 Kołbacz, Poland;
| | - Adrian Augustyniak
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
- Department of Chemical and Process Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Al. Piastów 42, 71-065 Szczecin, Poland
- Chair of Building Materials and Construction Chemistry, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Jolanta Karakulska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland; (M.R.); (J.J.); (X.S.); (K.D.); (J.K.); (M.G.); (J.K.)
| |
Collapse
|
7
|
Plant Growth-Promoting Rhizobacteria as a Green Alternative for Sustainable Agriculture. SUSTAINABILITY 2021. [DOI: 10.3390/su131910986] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Environmental stress is a major challenge for sustainable food production as it reduces yield by generating reactive oxygen species (ROS) which pose a threat to cell organelles and biomolecules such as proteins, DNA, enzymes, and others, leading to apoptosis. Plant growth-promoting rhizobacteria (PGPR) offers an eco-friendly and green alternative to synthetic agrochemicals and conventional agricultural practices in accomplishing sustainable agriculture by boosting growth and stress tolerance in plants. PGPR inhabit the rhizosphere of soil and exhibit positive interaction with plant roots. These organisms render multifaceted benefits to plants by several mechanisms such as the release of phytohormones, nitrogen fixation, solubilization of mineral phosphates, siderophore production for iron sequestration, protection against various pathogens, and stress. PGPR has the potential to curb the adverse effects of various stresses such as salinity, drought, heavy metals, floods, and other stresses on plants by inducing the production of antioxidant enzymes such as catalase, peroxidase, and superoxide dismutase. Genetically engineered PGPR strains play significant roles to alleviate the abiotic stress to improve crop productivity. Thus, the present review will focus on the impact of PGPR on stress resistance, plant growth promotion, and induction of antioxidant systems in plants.
Collapse
|
8
|
|
9
|
Manoj SR, Karthik C, Kadirvelu K, Arulselvi PI, Shanmugasundaram T, Bruno B, Rajkumar M. Understanding the molecular mechanisms for the enhanced phytoremediation of heavy metals through plant growth promoting rhizobacteria: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 254:109779. [PMID: 31726280 DOI: 10.1016/j.jenvman.2019.109779] [Citation(s) in RCA: 149] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 09/27/2019] [Accepted: 10/25/2019] [Indexed: 05/22/2023]
Abstract
Rapid industrialization, modern agricultural practices and other anthropogenic activities add a significant quantity of toxic heavy metals into the environment, which induces severe toxic effects on all form of living organisms, alter the soil properties and its biological activity. Remediation of heavy metal contaminated sites has become an urgent necessity. Among the existing strategies, phytoremediation is an eco-friendly and much convincing tool for the remediation of heavy metals. However, the applicability of phytoremediation in contaminated sites is restricted by two prime factors such as i) slow growth rate at higher metal contaminated sites and ii) metal bioavailability. This circumstance could be minimized and accelerate the phytoremediation efficiency by incorporating the potential plant growth promoting rhizobacterial (PGPR) as a combined approach. PGPR inoculation might improve the plant growth through the production of plant growth promoting substances and improve the heavy metal remediation efficiency by the secretion of chelating agents, acidification and redox changes. Moreover, rhizobacterial inoculation consolidates the metal tolerance and uptake by regulating the expression of various metal transporters, tolerant and metal chelator genes. However, the exact underlying molecular mechanism of PGPR mediated plant growth promotion and phytoremediation of heavy metals is poorly understood. Thus, the present review provides clear information about the molecular mechanisms excreted by PGPR strains in plant growth promotion and phytoremediation of heavy metals.
Collapse
Affiliation(s)
- Srinivas Ravi Manoj
- Plant and Microbial Biotechnology Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636 011, Tamil Nadu, India
| | - Chinnannan Karthik
- DRDO - BU - Centre for Life Sciences, Bharathiar University Campus, Coimbatore, 641 046, Tamil Nadu, India.
| | - Krishna Kadirvelu
- DRDO - BU - Centre for Life Sciences, Bharathiar University Campus, Coimbatore, 641 046, Tamil Nadu, India.
| | - Padikasan Indra Arulselvi
- Plant and Microbial Biotechnology Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636 011, Tamil Nadu, India
| | - Thangavel Shanmugasundaram
- DRDO - BU - Centre for Life Sciences, Bharathiar University Campus, Coimbatore, 641 046, Tamil Nadu, India
| | - Benedict Bruno
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India
| | - Mani Rajkumar
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India
| |
Collapse
|
10
|
Saxena G, Purchase D, Mulla SI, Saratale GD, Bharagava RN. Phytoremediation of Heavy Metal-Contaminated Sites: Eco-environmental Concerns, Field Studies, Sustainability Issues, and Future Prospects. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 249:71-131. [PMID: 30806802 DOI: 10.1007/398_2019_24] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Environmental contamination due to heavy metals (HMs) is of serious ecotoxicological concern worldwide because of their increasing use at industries. Due to non-biodegradable and persistent nature, HMs cause serious soil/water pollution and severe health hazards in living beings upon exposure. HMs can be genotoxic, carcinogenic, mutagenic, and teratogenic in nature even at low concentration. They may also act as endocrine disruptors and induce developmental as well as neurological disorders, and thus, their removal from our natural environment is crucial for the rehabilitation of contaminated sites. To cope with HM pollution, phytoremediation has emerged as a low-cost and eco-sustainable solution to conventional physicochemical cleanup methods that require high capital investment and labor alter soil properties and disturb soil microflora. Phytoremediation is a green technology wherein plants and associated microbes are used to remediate HM-contaminated sites to safeguard the environment and protect public health. Hence, in view of the above, the present paper aims to examine the feasibility of phytoremediation as a sustainable remediation technology for the management of metal-contaminated sites. Therefore, this paper provides an in-depth review on both the conventional and novel phytoremediation approaches; evaluates their efficacy to remove toxic metals from our natural environment; explores current scientific progresses, field experiences, and sustainability issues; and revises world over trends in phytoremediation research for its wider recognition and public acceptance as a sustainable remediation technology for the management of contaminated sites in the twenty-first century.
Collapse
Affiliation(s)
- Gaurav Saxena
- Laboratory for Bioremediation and Metagenomics Research (LBMR), Department of Environmental Microbiology (DEM), Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, Uttar Pradesh, India
| | - Diane Purchase
- Department of Natural Sciences, Faculty of Science and Technology, Middlesex University, London, UK
| | - Sikandar I Mulla
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, People's Republic of China
| | - Ganesh Dattatraya Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang-si, Gyeonggi-do, Republic of Korea
| | - Ram Naresh Bharagava
- Laboratory for Bioremediation and Metagenomics Research (LBMR), Department of Environmental Microbiology (DEM), Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, Uttar Pradesh, India.
| |
Collapse
|
11
|
Tiwari S, Lata C. Heavy Metal Stress, Signaling, and Tolerance Due to Plant-Associated Microbes: An Overview. FRONTIERS IN PLANT SCIENCE 2018; 9:452. [PMID: 29681916 PMCID: PMC5897519 DOI: 10.3389/fpls.2018.00452] [Citation(s) in RCA: 149] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 03/22/2018] [Indexed: 05/19/2023]
Abstract
Several anthropogenic activities including mining, modern agricultural practices, and industrialization have long-term detrimental effect on our environment. All these factors lead to increase in heavy metal concentration in soil, water, and air. Soil contamination with heavy metals cause several environmental problems and imparts toxic effect on plant as well as animals. In response to these adverse conditions, plants evolve complex molecular and physiological mechanisms for better adaptability, tolerance, and survival. Nowadays conventional breeding and transgenic technology are being used for development of metal stress resistant varieties which, however, are time consuming and labor intensive. Interestingly the use of microbes as an alternate technology for improving metal tolerance of plants is gaining momentum recently. The use of these beneficial microorganisms is considered as one of the most promising methods for safe crop-management practices. Interaction of plants with soil microorganisms can play a vital role in acclimatizing plants to metalliferous environments, and can thus be explored to improve microbe-assisted metal tolerance. Plant-associated microbes decrease metal accumulation in plant tissues and also help to reduce metal bioavailability in soil through various mechanisms. Nowadays, a novel phytobacterial strategy, i.e., genetically transformed bacteria has been used to increase remediation of heavy metals and stress tolerance in plants. This review takes into account our current state of knowledge of the harmful effects of heavy metal stress, the signaling responses to metal stress, and the role of plant-associated microbes in metal stress tolerance. The review also highlights the challenges and opportunities in this continued area of research on plant-microbe-metal interaction.
Collapse
Affiliation(s)
| | - Charu Lata
- CSIR-National Botanical Research Institute, Lucknow, India
| |
Collapse
|
12
|
Mejias Carpio IE, Ansari A, Rodrigues DF. Relationship of Biodiversity with Heavy Metal Tolerance and Sorption Capacity: A Meta-Analysis Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:184-194. [PMID: 29172474 DOI: 10.1021/acs.est.7b04131] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Microbial remediation of metals can alleviate the concerns of metal pollution in the environment. The microbial remediation, however, can be a complex process since microbial metal resistance and biodiversity can play a direct role in the bioremediation process. This study aims to understand the relationships among microbial metal resistance, biodiversity, and metal sorption capacity. Meta-analyses based on 735 literature data points of minimum inhibitory concentrations (MIC) of Plantae, Bacteria, and Fungi exposed to As, Cd, Cr Cu, Ni, Pb, and Zn showed that metal resistance depends on the microbial Kingdom and the type of heavy metal and that consortia are significantly more resistant to heavy metals than pure cultures. A similar meta-analysis comparing 517 MIC values from different bacterial genera (Bacillus, Cupriavidus, Klebsiella, Ochrobactrum, Paenibacillus, Pseudomonas, and Ralstonia) confirmed that metal tolerance depends on the type of genus. Another meta-analysis with 195 studies showed that the maximum sorption capacity is influenced by microbial Kingdoms, the type of biosorbent (whether consortia or pure cultures), and the type of metal. This study also suggests that bioremediation using microbial consortia is a valid option to reduce environmental metal contaminations.
Collapse
Affiliation(s)
- Isis E Mejias Carpio
- Department of Civil and Environmental Engineering. University of Houston , Houston, Texas 77004, United States
| | - Ali Ansari
- Department of Civil and Environmental Engineering. University of Houston , Houston, Texas 77004, United States
| | - Debora F Rodrigues
- Department of Civil and Environmental Engineering. University of Houston , Houston, Texas 77004, United States
| |
Collapse
|
13
|
Kumar A, Verma JP. Does plant-Microbe interaction confer stress tolerance in plants: A review? Microbiol Res 2017; 207:41-52. [PMID: 29458867 DOI: 10.1016/j.micres.2017.11.004] [Citation(s) in RCA: 189] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 10/26/2017] [Accepted: 11/04/2017] [Indexed: 01/17/2023]
Abstract
The biotic and abiotic stresses are major constraints for crop yield, food quality and global food security. A number of parameters such as physiological, biochemical, molecular of plants are affected under stress condition. Since the use of inorganic fertilizers and pesticides in agriculture practices cause degradation of soil fertility and environmental pollutions. Hence it is necessary to develop safer and sustainable means for agriculture production. The application of plant growth promoting microbes (PGPM) and mycorrhizal fungi enhance plant growth, under such conditions. It offers an economically fascinating and ecologically sound ways for protecting plants against stress condition. PGPM may promote plant growth by regulating plant hormones, improve nutrition acquisition, siderophore production and enhance the antioxidant system. While acquired systemic resistance (ASR) and induced systemic resistance (ISR) effectively deal with biotic stress. Arbuscular mycorrhiza (AM) enhance the supply of nutrients and water during stress condition and increase tolerance to stress. This plant-microbe interaction is vital for sustainable agriculture and industrial purpose, because it depends on biological processes and replaces conventional agriculture practices. Therefore, microbes may play a key role as an ecological engineer to solve environmental stress problems. So, it is a feasible and potential technology in future to feed global population at available resources with reduced impact on environmental quality. In this review, we have attempted to explore about abiotic and biotic stress tolerant beneficial microorganisms and their modes of action to enhance the sustainable agricultural production.
Collapse
Affiliation(s)
- Akhilesh Kumar
- Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi221005, U.P., India
| | - Jay Prakash Verma
- Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi221005, U.P., India.
| |
Collapse
|
14
|
Ashraf MA, Hussain I, Rasheed R, Iqbal M, Riaz M, Arif MS. Advances in microbe-assisted reclamation of heavy metal contaminated soils over the last decade: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 198:132-143. [PMID: 28456029 DOI: 10.1016/j.jenvman.2017.04.060] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 04/03/2017] [Accepted: 04/19/2017] [Indexed: 05/06/2023]
Abstract
Contamination of agricultural soils with trace metals present lethal consequences in terms of diverse ecological and environmental problems that entail entry of metal in food chain, soil deterioration, plant growth suppression, yield reduction and alteration in microbial community. Metal polluted soils have become a major concern for scientists around the globe. Phytoremediation involves the hyperaccumulation of metals in different plant parts. Phytoremediation of metals from polluted soils could be enhanced through inoculation with metal resistant plant growth promoting (PGP) bacteria. These PGP bacteria not only promote plant growth but also enhance metal uptake by plants. There are a number of reports in the literature where PGP bacterial inoculation improves metal accumulation in different plant parts without influencing plant growth. Therefore, there is a need to select PGP bacterial strains which possess the potential to improve plant growth as well as expedite the phytoremediation of metals. In this review, we have discussed the mechanisms possessed by PGP bacteria to promote plant growth and phytoremediation of metals. The central part of this review deals with the recent advances in microbial assisted-phytoremediation of metals.
Collapse
Affiliation(s)
- Muhammad Arslan Ashraf
- Department of Botany, Government College University Faisalabad, Faisalabad 38000, Pakistan.
| | - Iqbal Hussain
- Department of Botany, Government College University Faisalabad, Faisalabad 38000, Pakistan; Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Rizwan Rasheed
- Department of Botany, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Iqbal
- Department of Botany, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Riaz
- Department of Environmental Sciences & Engineering, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Saleem Arif
- Department of Environmental Sciences & Engineering, Government College University Faisalabad, Faisalabad 38000, Pakistan
| |
Collapse
|
15
|
Properties of alternative microbial hosts used in synthetic biology: towards the design of a modular chassis. Essays Biochem 2017; 60:303-313. [PMID: 27903818 PMCID: PMC5264504 DOI: 10.1042/ebc20160015] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 07/24/2016] [Accepted: 08/05/2016] [Indexed: 12/14/2022]
Abstract
The chassis is the cellular host used as a recipient of engineered biological systems in synthetic biology. They are required to propagate the genetic information and to express the genes encoded in it. Despite being an essential element for the appropriate function of genetic circuits, the chassis is rarely considered in their design phase. Consequently, the circuits are transferred to model organisms commonly used in the laboratory, such as Escherichia coli, that may be suboptimal for a required function. In this review, we discuss some of the properties desirable in a versatile chassis and summarize some examples of alternative hosts for synthetic biology amenable for engineering. These properties include a suitable life style, a robust cell wall, good knowledge of its regulatory network as well as of the interplay of the host components with the exogenous circuits, and the possibility of developing whole-cell models and tuneable metabolic fluxes that could allow a better distribution of cellular resources (metabolites, ATP, nucleotides, amino acids, transcriptional and translational machinery). We highlight Pseudomonas putida, widely used in many different biotechnological applications as a prominent organism for synthetic biology due to its metabolic diversity, robustness and ease of manipulation.
Collapse
|
16
|
Zhao C, Xu J, Li Q, Li S, Wang P, Xiang F. Cloning and characterization of a Phragmites australis phytochelatin synthase (PaPCS) and achieving Cd tolerance in tall fescue. PLoS One 2014; 9:e103771. [PMID: 25133575 PMCID: PMC4136729 DOI: 10.1371/journal.pone.0103771] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 07/02/2014] [Indexed: 11/25/2022] Open
Abstract
The production of phytochelatins (PCs) provides an important means for plants to achieve tolerance to cadmium (Cd) toxicity. A reed gene encoding PC synthase (PaPCS) was isolated and its function tested through its heterologous expression in a strain of yeast sensitive to Cd. Subsequently, the Cd sensitive and high biomass accumulating species tall fescue was transformed either with PaPCS or PaGCS (a glutamyl cysteine synthetase gene of reed) on their own (single transformants), or with both genes together in the same transgene cassette (double transformant). The single and double transformants showed greater Cd tolerance and accumulated more Cd and PC than wild type plants, and their Cd leaf/root ratio content was higher. The ranking in terms of Cd and PC content for the various transgenic lines was double transformants>PaGCS single transformants>PaPCS single transformants>wild type. Thus PaGCS appears to exert a greater influence than PaPCS over PC synthesis and Cd tolerance/accumulation. The double transformant has interesting potential for phytoremediation.
Collapse
Affiliation(s)
- Cuizhu Zhao
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, School of Life Sciences, Shandong University, Jinan, Shandong, China
- College of Agronomy, Northwest A&F University, Yangling, Shanxi, China
| | - Jin Xu
- Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, China
| | - Qiang Li
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Shuo Li
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Peng Wang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Fengning Xiang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, School of Life Sciences, Shandong University, Jinan, Shandong, China
- * E-mail:
| |
Collapse
|