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Hassan A, Hamid FS, Pariatamby A, Ossai IC, Ahmed A, Barasarathi J, Auta HS. Influence of bioaugmented fungi on tolerance, growth and phytoremediation ability of Prosopis juliflora Sw. DC in heavy metal-polluted landfill soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:28671-28694. [PMID: 38561536 DOI: 10.1007/s11356-024-33018-1] [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: 09/19/2023] [Accepted: 03/16/2024] [Indexed: 04/04/2024]
Abstract
The research aimed to determine the influence of endophytic fungi on tolerance, growth and phytoremediation ability of Prosopis juliflora in heavy metal-polluted landfill soil. A consortium of 13 fungal isolates as well as Prosopis juliflora Sw. DC was used to decontaminate heavy metal-polluted landfill soil. Enhanced plant growth (biomass and root and shoot lengths) and production of carotenoids, chlorophyll and amino acids L-phenylalanine and L-leucine that are known to enhance growth were found in the treated P. juliflora. Better accumulations of heavy metals were observed in fungi-treated P. juliflora over the untreated one. An upregulated activity of peroxidase, catalase and ascorbate peroxidase was recorded in fungi-treated P. juliflora. Additionally, other metabolites, such as glutathione, 3,5,7,2',5'-pentahydroxyflavone, 5,2'-dihydroxyflavone and 5,7,2',3'-tetrahydroxyflavone, and small peptides, which include Lys Gln Ile, Ser Arg Ala, Asp Arg Gly, Arg Ser Ser, His His Arg, Arg Thr Glu, Thr Arg Asp and Ser Pro Arg, were also detected. These provide defence supports to P. juliflora against toxic metals. Inoculating the plant with the fungi improved its growth, metal accumulation as well as tolerance against heavy metal toxicity. Such a combination can be used as an effective strategy for the bioremediation of metal-polluted soil.
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Affiliation(s)
- Auwalu Hassan
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Center for Research in Waste Management, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Department of Biological Sciences, Faculty of Science, Federal University of Kashere, Kashere, Gombe State, Nigeria.
| | - Fauziah Shahul Hamid
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Center for Research in Waste Management, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Agamuthu Pariatamby
- Jeffrey Sachs Center On Sustainable Development, Sunway University, Sunway, Malaysia
| | - Innocent Chukwunonso Ossai
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Center for Research in Waste Management, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Aziz Ahmed
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Center for Research in Waste Management, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Faculty of Marine Sciences, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Balochistan, Pakistan
| | - Jayanthi Barasarathi
- Faculty of Health and Life Sciences (FHLS), INTI International University, Pesiaran Perdana BBN, Nilai, Negeri Sambilan, Malaysia
| | - Helen Shnada Auta
- Department of Microbiology, Federal University of Technology, Minna, Niger State, Nigeria
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Islam M, Ferrarini A, Ali A, Kam J, Trindade LM, Clifton-Brown J, Amaducci S. Assessment of Drought and Zinc Stress Tolerance of Novel Miscanthus Hybrids and Arundo donax Clones Using Physiological, Biochemical, and Morphological Traits. BIOLOGY 2023; 12:1525. [PMID: 38132351 PMCID: PMC10741058 DOI: 10.3390/biology12121525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/06/2023] [Accepted: 12/08/2023] [Indexed: 12/23/2023]
Abstract
High-yield potential perennial crops, such as Miscanthus spp. and Arundo donax are amongst the most promising sources of sustainable biomass for bioproducts and bioenergy. Although several studies assessed the agronomic performance of these species on diverse marginal lands, research to date on drought and zinc (Zn) resistance is scarce. Thus, the objective of this study was to investigate the drought and Zn stress tolerance of seven novel Miscanthus hybrids and seven Arundo clones originating from different parts of Italy. We subjected both species to severe drought (less than 30%), and Zn stress (400 mg/kg-1 of ZnSO4) separately, after one month of growth. All plants were harvested after 28 days of stress, and the relative drought and Zn stress tolerance were determined by using a set of morpho-physio-biochemical and biomass attributes in relation to stress tolerance indices (STI). Principal component analysis (PCA), hierarchical clustering analysis (HCA) and stress tolerance indices (STI) were performed for each morpho-physio-biochemical and biomass parameters and showed significant relative differences among the seven genotypes of both crops. Heatmaps of these indices showed how the different genotypes clustered into four groups. Considering PCA ranking value, Miscanthus hybrid GRC10 (8.11) and Arundo clone PC1 (11.34) had the highest-ranking value under both stresses indicating these hybrids and clones are the most tolerant to drought and Zn stress. In contrast, hybrid GRC3 (-3.33 lowest ranking value) and clone CT2 (-5.84) were found to be the most sensitive to both drought and Zn stress.
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Affiliation(s)
- Monirul Islam
- Department of Sustainable Crop Production, Università Cattolica Del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (A.F.); (A.A.); (S.A.)
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Andrea Ferrarini
- Department of Sustainable Crop Production, Università Cattolica Del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (A.F.); (A.A.); (S.A.)
| | - Amjad Ali
- Department of Sustainable Crop Production, Università Cattolica Del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (A.F.); (A.A.); (S.A.)
| | - Jason Kam
- Terravesta, Unit 4 Riverside Court, Skellingthorpe Road, Lincoln LN1 5AB, UK
| | - Luisa M. Trindade
- Department of Plant Breeding, Wageningen University & Research, 6700 AJ Wageningen, The Netherlands;
| | - John Clifton-Brown
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth SY23 3EB, UK;
- Institut für Pflanzenbau und Pflanzenzüchtung I, Justus-Liebig-Universität Gießen, Interdisziplinäres Forschungszentrum iFZ, Heinrich-Buff-Ring 26, 35392 Gießen, Germany
| | - Stefano Amaducci
- Department of Sustainable Crop Production, Università Cattolica Del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (A.F.); (A.A.); (S.A.)
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Naqqash T, Aziz A, Gohar M, Khan J, Ali S, Radicetti E, Babar M, Siddiqui MH, Haider G. Heavy metal-resistant rhizobacteria fosters to alleviate the cadmium toxicity in Arabidopsis by upregulating the plant physiological responses. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:557-568. [PMID: 37705142 DOI: 10.1080/15226514.2023.2253923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
This study was designed to investigate the role of Morganella morganii strains in alleviating Cd stress in Arabidopsis seedlings under controlled conditions. Both M. morganii strains ABT3 (ON316873) and ABT9 (ON316874) strains isolated from salt-affected areas showed higher resistance against Cd and possess plant growth-promoting traits such as nitrogen fixation, indole-acetic acid production, ammonia production, phosphate solubilization, and, catalase, gelatinase and protease enzyme production. Plant inoculation assay showed that varying concentration of Cd (1.5 mM and 2.5 mM) significantly reduced Arabidopsis growth, quantum yield (56.70%-66.49%), and chlorophyll content (31.90%-42.70%). Cd toxicity also triggered different associations between lipid peroxidation (43.61%-69.77%) and enzymatic antioxidant mechanisms. However, when both strains were applied to the Arabidopsis seedlings, the shoot and root length and fresh and dry weights were improved in the control and Cd-stressed plants. Moreover, both strains enhanced the resistance against Cd stress by increasing antioxidant enzyme activities [catalase (19.47%-27.39%) and peroxidase (37.50%-48.07%)]that ultimately cause a substantial reduction in lipid peroxidation (27.71%-41.90%). Both strains particularly ABT3 also showed positive results in improving quantum yield (73.84%-98.64%) and chlorophyll content (41.13%-48.63%), thus increasing the growth of Arabidopsis seedlings. The study suggests that PGPR can protect plants from Cd toxicity, and Cd-tolerant rhizobacterial strains can remediate heavy metal polluted sites and improve plant growth.
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Affiliation(s)
- Tahir Naqqash
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
| | - Aeman Aziz
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
| | - Madiha Gohar
- Institute of Plant Breeding and Biotechnology, MNS University of Agriculture, Multan, Pakistan
| | - Jallat Khan
- Department of Bioscience and Technology, Khwaja Fareed University of Engineering, and Information Technology, Pakistan
| | - Shahbaz Ali
- Department of Bioscience and Technology, Khwaja Fareed University of Engineering, and Information Technology, Pakistan
| | - Emanuele Radicetti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Muhammad Babar
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
| | - Manzer H Siddiqui
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ghulam Haider
- Department of Plant Biotechnology, Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
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Mohanty M, Mohapatra S. Synergistic effect of PGPR and PSB for alleviation of chromium toxicity in Vigna radiata (L.) R. Wilczek seedlings. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 25:1733-1742. [PMID: 36941766 DOI: 10.1080/15226514.2023.2189479] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The current investigation depicts the individual and synergistic effects of two important plant growth promoting microbial groups viz. Plant Growth Promoting Rhizobacteria (PGPR) and Phosphate Solubilizing Bacteria (PSB) in alleviating the phytotoxic impacts of chromium in Vigna radiata (L) R. Wilczek (green gram) seedlings. Cr6+ (100 ppm) treatment caused a stiff decline of about 44%, 72%, 68%, and 49% reduction in root and shoot length as well as leaf number and leaf area respectively as compared to control after 90 d of exposure. However, combined amendment with PGPR and PSB causes a significant amelioration of Cr toxicity though doubling the shoot length and leaf area with a 4 times increase in root length and leaf number after 90 d of growth. Total chlorophyll synthesis showed a 68% reduction in Cr6+ (100 ppm) which was ameliorated by combined treatments of PGPR and PSB. It showed a 123% increased total chlorophyll content than Cr6+ (100 ppm) whereas individual application of PGPR and PSB showed a 46% and 27% increase respectively. Combined application of PGPR and PSB with a toxic dose of Cr showed significant boosting alleviation ability and indicates its ameliorative role for abatement of Cr-induced toxicity.
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Affiliation(s)
- Monalisa Mohanty
- Department of Biotechnology, Rama Devi Women's University, Bhubaneswar, India
| | - Sikha Mohapatra
- Research Scholar, Department of Biotechnology, Rama Devi Women's University, Bhubaneswar, India
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Visconti D, Ventorino V, Fagnano M, Woo SL, Pepe O, Adamo P, Caporale AG, Carrino L, Fiorentino N. Compost and microbial biostimulant applications improve plant growth and soil biological fertility of a grass-based phytostabilization system. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:787-807. [PMID: 35318555 PMCID: PMC10014777 DOI: 10.1007/s10653-022-01235-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 02/16/2022] [Indexed: 05/10/2023]
Abstract
In this work, a grass-based phytoremediation system integrated with an organic amendment and biostimulants was evaluated for remediating contaminated sites. Plant growth and biological fertility were monitored to assess the efficacy of a vegetative cap used as a safety measure to reduce sanitary and environmental risks of industrially contaminated soils and soil-washing sludges. Both matrices were potentially contaminated with Pb and Zn with an ecological risk index from low to moderate. According to potentially toxic elements (PTEs) bioaccessibility tests, the exposure to the released fine particulate matter may cause serious risks to human beings, in particular to children. The grass mixture was well adapted to both the substrates and a low PTEs mobility was detected, thus, reducing the leaching risk to ground water sources. Compost addition augmented significantly nitrogenase reductase (nifH) and ammonia monooxygenase (amoA) gene expression abundance in both substrates. Furthermore, a positive interaction between compost fertilization and a Trichoderma-based biostimulant inoculation was recorded in sludges resulting in a significant stimulation of nitrogen-fixing and ammonia-oxidizing bacteria. The application of compost and biostimulant increased soil fertility and plant growth. Furthermore, there was a slight reduction in PTE bioaccessibility, thus, improving the efficiency of the phytostabilization, limiting the resuspension and dispersion of the health-risk soil particulate.
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Affiliation(s)
- Donato Visconti
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy.
| | - Valeria Ventorino
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy
| | - Massimo Fagnano
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy
| | - Sheridan Lois Woo
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy
- Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), 80055, Portici, Italy
- Institute for Sustainable Plant Protection, National Research Council, 80055, Portici, Italy
| | - Olimpia Pepe
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy
| | - Paola Adamo
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy
| | | | - Linda Carrino
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy
| | - Nunzio Fiorentino
- Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Italy.
- Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), 80055, Portici, Italy.
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Ramos-Perez D, Alcántara-Hernández RJ, Romero FM, González-Chávez JL. Changes in the prokaryotic diversity in response to hydrochemical variations during an acid mine drainage passive treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 842:156629. [PMID: 35691343 DOI: 10.1016/j.scitotenv.2022.156629] [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: 03/04/2022] [Revised: 05/07/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
Acid mine drainage (AMD) causes major environmental problems and consequently, several treatments are proposed, favoring the passive systems because of their many advantages. The main goal of these procedures is the neutralization and removal of potentially toxic elements (PTE), yet little is known about the changes in the microbial assemblages in response to the hydrochemical variations during the treatments. Therefore, the main objective of this research was to determine the changes in the diversity and structure of the prokaryotic assemblages in a hybrid abiotic and biological (wetland) passive treatment system. The 16S rRNA gene survey showed that the AMD coming from the mine (pH 2.6) was mainly composed of acidophilic genera such as Acidithiobacillus, Leptospirillum, Ferritrophicum, and Cuniculiplasma (up to 76 % relative abundance). In the abiotic treatment, Acidiphilium was dominant in the sections with limestone filters (pH 2.2-4.8), followed by Limnobacter in the subsequent dolomite/limestone and phosphoric rock filters (pH 5.2-5.8). In these abiotic passive treatment sections, the microbial assemblage showed a limited diversity and richness. However, when the treated AMD reached the two final wetlands (pH ~6.8), the microbial diversity and richness increased, suggesting that further bioattenuation mechanisms might be occurring. Limnobacter and Novosphingobium were the main bacterial genera in the water samples of the wetland sections (Arundo donax). These changes in the composition of the microbial assemblages were highly correlated with the pH and Eh values during the treatment (p-value <0.001); however, the concentration of metal(loid)s such as Al, Cd, Fe, Mn, Ni, and Zn were also significantly related (p-value <0.05). In conclusion, the studied passive AMD treatment system enhanced the chemical quality of the treated AMD, showing high removal efficiencies for Al and Fe (> 99 %), and increasing the microbial diversity and richness in the effluent.
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Affiliation(s)
- Daniel Ramos-Perez
- Posgrado en Ciencias de la Tierra, Universidad Nacional Autónoma de México (UNAM), Mexico
| | - Rocio J Alcántara-Hernández
- Instituto de Geología, Ciudad Universitaria, Universidad Nacional Autónoma de México (UNAM), 04510 Ciudad de México, México.
| | - Francisco M Romero
- Instituto de Geología, Ciudad Universitaria, Universidad Nacional Autónoma de México (UNAM), 04510 Ciudad de México, México; Laboratorio Nacional de Geoquímica y Mineralogía, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
| | - José Luz González-Chávez
- Facultad de Química, Ciudad Universitaria, Universidad Nacional Autónoma de México (UNAM), 04510 Ciudad de México, México
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Samet M, Ghazala I, Karray F, Abid C, Chiab N, Nouri-Ellouz O, Sayadi S, Gargouri-Bouzid R. Isolation of bacterial strains from compost teas and screening of their PGPR properties on potato plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:75365-75379. [PMID: 35653020 DOI: 10.1007/s11356-022-21046-8] [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: 01/25/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The beneficial effect of compost and compost tea on plant growth and protection is mainly associated with the microbial diversity and the presence of bacteria with plant growth-promoting effect. PGPR are considered as eco-friendly bio-fertilizers that may reduce the use of chemical pesticides and fertilizers. Three composts (AT, A10, and A30) were previously prepared from industrial wastes (olive mill wastewater, olive pomace, coffee ground, and phosphogypsum). In the present study, we isolated three bacterial strains from the compost teas. The phylogenetic identification of these bacterial strains (B.AT, B.A10, and B.A30) showed that they correspond to Serratia liquefaciens (B.AT and B.A10) and Achromobacter spanius (B.A30) species. A further characterization of the PGPR traits of these bacteria showed that they produce siderophore, exopolysaccharides, and IAA. Their effect on potato plant growth, yields, and tuber quality was performed under field culture conditions. Results showed that these strains can be characterized as PGPR, the best effect on potato plant growth was observed with Serratia liquefaciens (B.AT), the best yield and tuber quality was observed with Serratia liquefaciens (B.A10) while bacterial treatment with Achromobacter spanius (B.A30) is a Cd-tolerant PGPR.
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Affiliation(s)
- Mariem Samet
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia.
| | - Imen Ghazala
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Sfax Biotechnology Center, Road of Sidi Mansour km6, BP 1177, 3018, Sfax, Tunisia
| | - Cyrine Abid
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Nour Chiab
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Oumèma Nouri-Ellouz
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
| | - Radhia Gargouri-Bouzid
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
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Pandey AK, Zorić L, Sun T, Karanović D, Fang P, Borišev M, Wu X, Luković J, Xu P. The Anatomical Basis of Heavy Metal Responses in Legumes and Their Impact on Plant-Rhizosphere Interactions. PLANTS (BASEL, SWITZERLAND) 2022; 11:2554. [PMID: 36235420 PMCID: PMC9572132 DOI: 10.3390/plants11192554] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/15/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Rapid industrialization, urbanization, and mine tailings runoff are the main sources of heavy metal contamination of agricultural land, which has become one of the major constraints to crop growth and productivity. Finding appropriate solutions to protect plants and agricultural land from heavy metal pollution/harmful effects is important for sustainable development. Phytoremediation and plant growth-promoting rhizobacteria (PGPR) are promising methods for this purpose, which both heavily rely on an appropriate understanding of the anatomical structure of plants. Specialized anatomical features, such as those of epidermis and endodermis and changes in the root vascular tissue, are often associated with heavy metal tolerance in legumes. This review emphasizes the uptake and transport of heavy metals by legume plants that can be used to enhance soil detoxification by phytoremediation processes. Moreover, the review also focuses on the role of rhizospheric organisms in the facilitation of heavy metal uptake, the various mechanisms of enhancing the availability of heavy metals in the rhizosphere, the genetic diversity, and the microbial genera involved in these processes. The information presented here can be exploited for improving the growth and productivity of legume plants in metal-prone soils.
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Affiliation(s)
- Arun K. Pandey
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
| | - Lana Zorić
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, 21121 Novi Sad, Serbia
| | - Ting Sun
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang Province, Hangzhou 310018, China
| | - Dunja Karanović
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, 21121 Novi Sad, Serbia
| | - Pingping Fang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang Province, Hangzhou 310018, China
| | - Milan Borišev
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, 21121 Novi Sad, Serbia
| | - Xinyang Wu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang Province, Hangzhou 310018, China
| | - Jadranka Luković
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, 21121 Novi Sad, Serbia
| | - Pei Xu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang Province, Hangzhou 310018, China
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Wang T, Wang H, Feng K, Li H, Wang H. Soil bacteria around a derelict tailings pile with different metal pollution gradients: community composition, metal tolerance and influencing factors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:60616-60630. [PMID: 35426553 DOI: 10.1007/s11356-022-20142-z] [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: 12/08/2021] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
Bacteria play a vital role in ecological processes of soil contaminated by heavy metals. Here, soil sampling was carried out around a tailings pile contaminated to different degrees by cadmium (Cd), lead (Pb) and arsenic (As). The bacteria in the soil were cultured, separated and purified on Luria-Bertani medium, and the changes in bacterial communities in soils with different pollution levels were analysed with 16S rRNA sequencing. Bacillus pacificus strain MZ520364 was found to be highly tolerant to Cd, Pb and As, and single-metal and multimetal tolerance experiments were further conducted with this strain. The results obtained from alpha diversity and operational taxonomic unit (OTU) statistical analyses showed a significant difference in bacterial composition among soils with different metal pollution levels, and the highest bacterial diversity was found at the most severely polluted site. Evidence from variance partitioning analysis (VPA) and the Spearman correlation heatmap analysis showed that the leading factors affecting bacterial community composition were cation exchange content (CEC), pH, total Zn, total As, and available As concentrations in soil. Additionally, in the single-metal treatments, B. pacificus MZ520364 could tolerate 600 mg/L Cd2+, 1000 mg/L Pb2+ or 700 mg/L As3+. When Cd, Pb and As coexisted, the best growth of B. pacificus MZ520364 was present at 120 mg/L Cd2+, 200 mg/L Pb2+ and 150 mg/L As3+. The effect of Cd, Pb and As on the growth of the strain followed the order of Cd > As > Pb, and the heavy metal combination showed more toxicity than single metals. In summary, our results revealed the ecological impact of soil physicochemical properties on the diversity and richness of soil bacterial communities and suggested that B. pacificus MZ520364 may be used for the remediation of Cd-Pb-As co-contaminated soil.
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Affiliation(s)
- Tian Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Haijuan Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
- Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming, 650500, China
| | - Kaiping Feng
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Haiyan Li
- School of Medicine, Kunming University of Science and Technology, Kunming, 650500, China
| | - Hongbin Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
- Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming, 650500, China.
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Cadmium-Tolerant Plant Growth-Promoting Bacteria Curtobacterium oceanosedimentum Improves Growth Attributes and Strengthens Antioxidant System in Chili (Capsicum frutescens). SUSTAINABILITY 2022. [DOI: 10.3390/su14074335] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The remediation of potentially toxic element-polluted soils can be accomplished through the use of microbial and plant-assisted bioremediation. A total of 32 bacteria were isolated from soil samples contaminated with potentially toxic elements. The isolated bacterial strain DG-20 showed high tolerance to cadmium (up to 18 mM) and also showed bioaccumulative Cd removal properties, as demonstrated by atomic absorption spectroscopy studies. By sequencing the 16S rRNA gene, this strain was identified as Curtobacterium oceanosedimentum. Under stress and normal conditions, isolate DG-20 also produced a wide range of plant growth promoting traits, including ammonia production (51–73 µg/mL) and IAA production (116–183 µg/mL), alongside siderophore production and phosphate solubilization. Additionally, pot experiments were conducted to determine whether the strain could promote Chili growth when Cd salts are present. Over the control, bacterial colonization increased root and shoot lengths significantly up to 58% and 60%, respectively. Following inoculation with the Cd-tolerant strain, the plants also increased in both fresh and dry weight. In both the control and inoculated plants, Cd was accumulated more in roots than in shoots, indicating that Chili was phytostabilizing Cd levels. Besides improving the plant attributes, Cd-tolerant bacteria were also found to increase the amount of total chlorophyll, proline, total phenol, and ascorbic acid in the soil when added to the soil. These results suggest that the inoculant provides protection to plants from negative effects. The results of the present study predict that the combined properties of the tested strain in terms of Cd tolerance and plant growth promotion can be exploited for the purpose of the bioremediation of Cd, and for the improvement of Chili cultivation in soils contaminated with Cd.
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Li Y, Ma J, Li Y, Xiao C, Shen X, Chen J, Xia X. Nitrogen addition facilitates phytoremediation of PAH-Cd cocontaminated dumpsite soil by altering alfalfa growth and rhizosphere communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150610. [PMID: 34597578 DOI: 10.1016/j.scitotenv.2021.150610] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/22/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Thousands of unlined landfills and open dumpsites seriously threatened the safety of soil and groundwater due to leachate leakage with a mass of pollutants, particularly heavy metals, organic contaminants and ammonia. Phytoremediation is widely used in the treatment of cocontaminated soils because it is cost-effective and environmentally friendly. However, the extent to which phytoremediation efficiency and plant physiological responses are affected by the high nitrogen (N) content in such cocontaminated soil is still uncertain. Here, pot experiments were conducted to investigate the effects of N addition on the applicability of legume alfalfa remediation for polycyclic aromatic hydrocarbon‑cadmium (PAHCd) co-/contaminated soil and the corresponding microbial regulation mechanism. The results showed that the PAH dissipation rates and Cd removal rates in the high-contamination groups increased with the external N supply, among which the pyrene dissipation rates in the cocontaminated soil was elevated most significantly, from 78.10% to 87.25%. However, the phytoremediation efficiency weakened in low cocontaminated soil, possibly because the excessive N content had inhibitory effects on the rhizobium Ensifer and restrained alfalfa growth. Furthermore, the relative abundance of PAH-degrading bacteria in the rhizosphere dominated PAH dissipation. As reflected by principal coordinate analysis (PCoA) analysis and hierarchical dendrograms, the microbial community composition changed with N addition, and a more pronounced shift was found in the rhizosphere relative to the endosphere or shoots of alfalfa. This study will provide a theoretical basis for legume plant remediation of dumpsites as well as soil contaminated with multiple pollutants.
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Affiliation(s)
- Yijia Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
| | - Junwei Ma
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
| | - Yuqian Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
| | - Chen Xiao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
| | - Xinyi Shen
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
| | - Jiajun Chen
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
| | - Xinghui Xia
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing 100875, PR China.
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Ghosh A, Pramanik K, Bhattacharya S, Mondal S, Ghosh SK, Maiti TK. A potent cadmium bioaccumulating Enterobacter cloacae strain displays phytobeneficial property in Cd-exposed rice seedlings. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100101. [PMID: 35024643 PMCID: PMC8724972 DOI: 10.1016/j.crmicr.2021.100101] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 10/30/2021] [Accepted: 12/16/2021] [Indexed: 12/21/2022] Open
Abstract
Cd-resistant and halotolerant PGPR enterobacter cloacae AS10 was isolated. AS10 showed IAA, HCN production, P-solubilization, N2 fixation, ACCD activity. AAS-TEM-EDAX-XRD-XRF-FTIR studies confirmed Cd bioaccumulation by AS10. AS10 reduced oxidative stress, Cd uptake and improved rice seedling growth in vitro.
In agricultural soil, cadmium (Cd) pollution compromises soil health, reduces crop yield, and produces Cd-contaminated crops. Bio-based approaches are necessary as an eco-friendly and sustainable solution to mitigate Cd-polluted areas. A heavy metal-resistant rhizobacterial strain (AS10) has been isolated from a heavy metal-defiled rice field. The 16S rDNA sequence and MALDI-TOF MS analyses of ribosomal protein reveal its identity closely similar to Enterobacter cloacae. The strain was found to withstand up to 4000 μg/ml Cd2+, 3312 µg/ml Pb2+ and 1500 µg/ml As3+. The Cd2+ removal efficiency was recorded as high as 72.11% when grown in 4000 μg/ml Cd2+. The strain's Cd-accumulation efficiency was also apprehended by TEM-EDAX followed by XRD-XRF-FTIR analyses. Besides, the strain showed solubilization of inorganic phosphate, ACC deaminase activity, nitrogen fixation and IAA production ability. Added further, the strain, as an efficient bioinoculant, significantly improved rice plant growth at the seedling stage through Cd immobilization. It prevented the surge of stress ethylene and oxidative stress in rice seedlings, resulting in overall plant growth improvement. Hence, the strain AS10 as potent plant growth-promoting rhizobacteria (PGPR) may be beneficial, especially in heavy metal-contaminated crop fields.
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Affiliation(s)
- Antara Ghosh
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | - Krishnendu Pramanik
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva-Bharati, Siksha Bhavana, Birbhum, Santiniketan, West Bengal 731235, India
| | - Shatabda Bhattacharya
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, South Korea
| | - Sayanta Mondal
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | - Sudip Kumar Ghosh
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | - Tushar Kanti Maiti
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
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Changes in Bacterial Diversity and Composition in Response to Co-inoculation of Arbuscular Mycorrhizae and Zinc-Solubilizing Bacteria in Turmeric Rhizosphere. Curr Microbiol 2021; 79:4. [PMID: 34894281 DOI: 10.1007/s00284-021-02682-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 10/02/2021] [Indexed: 10/19/2022]
Abstract
In the present study, the impact of co-inoculation of arbuscular mycorrhizal fungi (AM Rhizophagus sp., NCBI-MN710507) and Zinc solubilizing bacteria (ZSB2- Bacillus megaterium, NCBI-KY687496) on plant growth, soil dehydrogenase activity, soil respiration and the changes in bacterial diversity in rhizosphere of turmeric (Curcuma longa) were examined. Our results showed that higher plant height and dry biomass were observed in treatments co-inoculated with AM and ZSB2. Likewise, dehydrogenase activity and soil respiration were more significant in the co-inoculation treatment, indicating abundance of introduced as well as inherent microflora. Bacterial community analysis using 16S rRNA revealed changes in the structure and diversity of various taxa due to co-inoculation of AM and ZSB2. Alpha diversity indexes (Shannon and Chao1) and beta diversity indexes obtained through unweighted unifrac approach also showed variation among the treated samples. Chloroflexi was the dominant phylum followed by Proteobacteria, Actinobacteria and Acidobacteria which accounted for 80% of all treated samples. The composition of bacterial communities at genus level revealed that co-inoculation caused distinct bacterial profiles. The Linear discriminant analysis effect size revealed the dominance of ecologically significant genera such as Bradyrhizobium, Candidatus, Pedomicrbium, Thermoporothrix, Acinetobacter and Nitrospira in treatments co-inoculated with AM and ZSB2. On the whole, co-inoculated treatments revealed enhanced microbial activities and caused significant positive shifts in the bacterial diversity and abundance compared to treatments with sole application of ZSB2 or AM.
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El-Mahdy OM, Mohamed HI, Mogazy AM. Biosorption effect of Aspergillus niger and Penicillium chrysosporium for Cd- and Pb-contaminated soil and their physiological effects on Vicia faba L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:67608-67631. [PMID: 34258698 DOI: 10.1007/s11356-021-15382-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
Phytoremediation is an important solution to soil pollution management. The goal of this study is to determine the biosorption ability of the two selected fungi (Aspergillus niger and Penicillium chrysosporium) under heavy metal stress on faba bean plants. The fungal strains produced phytohormones, siderophore, ACC deaminase, and secondary metabolites. The biosorption capacity of A. niger and P. chrysosporium was 0.09 and 0.06 mg g-1 and 0.5 and 0.4 mg g-1 in media containing Cd and Pb, respectively. Fourier transform infrared spectroscopy of the fungal cell wall show primary functional groups like hydroxyl, amide, carboxyl, phosphoryl, sulfhydryl, and nitro. Therefore, A. niger and P. chrysosporium were inoculated to soils, and then the faba bean seeds were sown. After 21 days of sowing, the plants were irrigated with water to severe as control, with 100 mg L-1 of Cd and 200 mg L-1 of Pb. The results show that Cd and Pb caused a significant reduction in morphological characteristics, auxin, gibberellins, photosynthetic pigments, minerals content, and antioxidant enzymes as compared to control plants but caused a substantial boost in abscisic acid, ethylene, electrolyte leakage, lipid peroxidation, glutathione, proline, superoxide dismutase, secondary metabolites, and antioxidant capacity. In inoculated plants, metal-induced oxidative stress was modulated by inhibiting the transport of metal and decreased electrolyte leakage and lipid peroxidation. Finally, the inoculation of endophytic fungi contributed actively to the absorption of heavy metals and decreased their content in soil and plants. This could be utilized as an excellent technique in the fields of heavy metal-contaminated sustainable agriculture.
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Affiliation(s)
- Omima M El-Mahdy
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, El Makres St. Roxy, Cairo, 11341, Egypt
| | - Heba I Mohamed
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, El Makres St. Roxy, Cairo, 11341, Egypt.
| | - Asmaa M Mogazy
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, El Makres St. Roxy, Cairo, 11341, Egypt
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Niu XY, Wang SK, Zhou J, Di DL, Sun P, Huang DZ. Inoculation With Indigenous Rhizosphere Microbes Enhances Aboveground Accumulation of Lead in Salix integra Thunb. by Improving Transport Coefficients. Front Microbiol 2021; 12:686812. [PMID: 34421844 PMCID: PMC8371752 DOI: 10.3389/fmicb.2021.686812] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 07/13/2021] [Indexed: 11/13/2022] Open
Abstract
The application of plant-microbial remediation of heavy metals is restricted by the difficulty of exogenous microbes to form large populations and maintain their long-term remediation efficiency. We therefore investigated the effects of inoculation with indigenous heavy-metal-tolerant rhizosphere microbes on phytoremediation of lead (Pb) by Salix integra. We measured plant physiological indexes and soil Pb bioavailability and conducted widespread targeted metabolome analysis of strains to better understand the mechanisms of enhance Pb accumulation. Growth of Salix integra was improved by both single and co-inoculation treatments with Bacillus sp. and Aspergillus niger, increasing by 14% in co-inoculated plants. Transfer coefficients for Pb, indicating mobility from soil via roots into branches or leaves, were higher following microbial inoculation, showing a more than 100% increase in the co-inoculation treatment over untreated plants. However, Pb accumulation was only enhanced by single inoculation treatments with either Bacillus sp. or Aspergillus niger, being 10% greater in plants inoculated with Bacillus sp. compared with uninoculated controls. Inoculation mainly promoted accumulation of Pb in aboveground plant parts. Superoxide dismutase and catalase enzyme activities as well as the proline content of inoculated plants were enhanced by most treatments. However, soil urease and catalase activities were lower in inoculated plants than controls. Proportions of acid-soluble Pb were 0.34 and 0.41% higher in rhizosphere and bulk soil, respectively, of plants inoculated with Bacillus sp. than in that of uninoculated plants. We identified 410 metabolites from the microbial inoculations, of which more than 50% contributed to heavy metal bioavailability; organic acids, amino acids, and carbohydrates formed the three major metabolite categories. These results suggest that both indigenous Bacillus sp. and Aspergillus niger could be used to assist phytoremediation by enhancing antioxidant defenses of Salix integra and altering Pb bioavailability. We speculate that microbial strains colonized the soil and plants at the same time, with variations in their metabolite profiles reflecting different living conditions. We also need to consider interactions between inocula and the whole microbial community when applying microbial inoculation to promote phytoremediation.
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Affiliation(s)
- Xiao-Yun Niu
- College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Shao-Kun Wang
- College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Jian Zhou
- College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Dong-Liu Di
- College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Pai Sun
- College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Da-Zhuang Huang
- College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
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Yang H, Yu H, Tang H, Huang H, Zhang X, Zheng Z, Wang Y, Li T. Physiological responses involved in cadmium tolerance in a high-cadmium-accumulating rice (Oryza sativa L.) line. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:41736-41745. [PMID: 33791958 DOI: 10.1007/s11356-021-12956-0] [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] [Received: 09/08/2020] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
The disparity of tolerance in plants in response to Cd stress is associated with multiple physiological processes. A pot experiment was conducted to investigate the physiological properties involved in Cd tolerance of a high-cadmium (Cd)-accumulating rice line (Lu527-8) in comparison with a normal rice line (Lu527-4) under different levels of Cd exposure. Lu527-8 showed higher biomass and Cd concentrations compared with Lu527-4. The tolerance index (TI), bioconcentration factor (BCF), and translocation factor (TF) of Lu527-8 could be up to 3.08, 1.48, and 4.50 times these of Lu527-4, respectively. The two rice lines owned a uniform strategy to reduce Cd toxicity in root and stem by Cd deposition in cell wall and compartmentalization in vacuoles instead of keeping Cd in organelles. For Lu527-8, the higher distribution proportions of Cd combined with cell wall in leaf was linked to its higher Cd tolerance in comparison with Lu527-4. Lu527-8 showed a lower decline in membrane stability, antioxidation, photosynthetic parameters, and pigments than Lu527-4 when exposed to Cd stress. Taken together, the results demonstrated that higher Cd tolerance in high-Cd-accumulating rice Lu527-8 is closely linked to its greater abilities of cell wall fixation in leaf, oxidation resistance, as well as osmotic regulation and photosynthesis.
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Affiliation(s)
- Huan Yang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Haiying Yu
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Hao Tang
- Plant Ecology, Institute of Plant Science and Microbiology, Universität Hamburg, Ohnhorststr, 18, 22609, Hamburg, Germany
| | - Huagang Huang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Xizhou Zhang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Zicheng Zheng
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Yongdong Wang
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China
| | - Tingxuan Li
- College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, Sichuan, China.
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Pramanik K, Mandal S, Banerjee S, Ghosh A, Maiti TK, Mandal NC. Unraveling the heavy metal resistance and biocontrol potential of Pseudomonas sp. K32 strain facilitating rice seedling growth under Cd stress. CHEMOSPHERE 2021; 274:129819. [PMID: 33582538 DOI: 10.1016/j.chemosphere.2021.129819] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/09/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Heavy metal and metalloid toxicity in agricultural land needs special attention for crop production essential to feed increasing population globally. Plant growth-promoting rhizobacteria (PGPR) are native biological agents that have tremendous potential to augment crop production in contaminated fields. This study involves selection and identification (through 16S rRNA gene sequence and FAME analysis) of a potent Pseudomonas sp. (strain K32) isolated from a metal-contaminated rice rhizosphere, aimed to its application for sustainable agriculture. Apart from multi-heavy metal(loid) resistance (Cd2+, Pb2+ and As3+ upto 4000, 3800, 3700 μg/ml respectively) along with remarkable Cd bioaccumulation potential (∼90%), this strain showed IAA production, nitrogen-fixation and phosphate solubilization under Cd stress. This bioaccumulation efficiency coupled with PGP traits resulted in the significant enhancement of rice seedling growth under Cd stress. This positive impact of K32 strain was clearly manifested in morphological and biochemical improvements under Cd stress including successful root colonization with rice roots. Cd uptake was also reduced significantly in seedlings in presence of K32 strain. Together with all mentioned properties, K32 showed bio-control potential against plant pathogenic fungi viz. Aspergillus flavus, Aspergillus parasiticus, Paecilomyces sp., Cladosporium herbarum, Rhizopus stolonifer and Alternaria alternata which establish K32 strain a key player in effective bioremediation of agricultural fields. Biocontrol potential was found to be the result of enzymatic activities viz. chitinase, β-1,3-glucanase and protease which were estimated as 8.17 ± 0.44, 4.38 ± 0.35 and 7.72 ± 0.28 U/mg protein respectively.
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Affiliation(s)
- Krishnendu Pramanik
- Mycology and Plant Pathology Laboratory, Department of Botany, Siksha Bhavana, Visva-Bharati, Santiniketan, Birbhum, PIN-731235, West Bengal, India.
| | - Subhrangshu Mandal
- Department of Botany, Siksha Bhavana, Visva-Bharati, Santiniketan, Birbhum, PIN-731235, West Bengal, India.
| | - Sandipan Banerjee
- Mycology and Plant Pathology Laboratory, Department of Botany, Siksha Bhavana, Visva-Bharati, Santiniketan, Birbhum, PIN-731235, West Bengal, India.
| | - Antara Ghosh
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P.O.-Rajbati, PIN-713104, West Bengal, India.
| | - Tushar Kanti Maiti
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Golapbag, Purba Bardhaman, P.O.-Rajbati, PIN-713104, West Bengal, India.
| | - Narayan Chandra Mandal
- Mycology and Plant Pathology Laboratory, Department of Botany, Siksha Bhavana, Visva-Bharati, Santiniketan, Birbhum, PIN-731235, West Bengal, India.
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Ferrarini A, Fracasso A, Spini G, Fornasier F, Taskin E, Fontanella MC, Beone GM, Amaducci S, Puglisi E. Bioaugmented Phytoremediation of Metal-Contaminated Soils and Sediments by Hemp and Giant Reed. Front Microbiol 2021; 12:645893. [PMID: 33959108 PMCID: PMC8096354 DOI: 10.3389/fmicb.2021.645893] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/10/2021] [Indexed: 12/20/2022] Open
Abstract
We assessed the effects of EDTA and selected plant growth-promoting rhizobacteria (PGPR) on the phytoremediation of soils and sediments historically contaminated by Cr, Ni, and Cu. A total of 42 bacterial strains resistant to these heavy metals (HMs) were isolated and screened for PGP traits and metal bioaccumulation, and two Enterobacter spp. strains were finally selected. Phytoremediation pot experiments of 2 months duration were carried out with hemp (Cannabis sativa L.) and giant reed (Arundo donax L.) grown on soils and sediments respectively, comparing in both cases the effects of bioaugmentation with a single PGPR and EDTA addition on plant and root growth, plant HM uptake, HM leaching, as well as the changes that occurred in soil microbial communities (structure, biomass, and activity). Good removal percentages on a dry mass basis of Cr (0.4%), Ni (0.6%), and Cu (0.9%) were observed in giant reed while negligible values (<100‰) in hemp. In giant reed, HMs accumulated differentially in plant (rhizomes > > roots > leaves > stems) with largest quantities in rhizomes (Cr 0.6, Ni 3.7, and Cu 2.2 g plant–1). EDTA increased Ni and Cu translocation to aerial parts in both crops, despite that in sediments high HM concentrations in leachates were measured. PGPR did not impact fine root diameter distribution of both crops compared with control while EDTA negatively affected root diameter class length (DCL) distribution. Under HM contamination, giant reed roots become shorter (from 5.2 to 2.3 mm cm–3) while hemp roots become shorter and thickened from 0.13 to 0.26 mm. A consistent indirect effect of HM levels on the soil microbiome (diversity and activity) mediated by plant response (root DCL distribution) was observed. Multivariate analysis of bacterial diversity and activity revealed not only significant effects of plant and soil type (rhizosphere vs. bulk) but also a clear and similar differentiation of communities between control, EDTA, and PGPR treatments. We propose root DCL distribution as a key plant trait to understand detrimental effect of HMs on microbial communities. Positive evidence of the soil-microbe-plant interactions occurring when bioaugmentation with PGPR is associated with deep-rooting perennial crops makes this combination preferable over the one with chelating agents. Such knowledge might help to yield better bioaugmented bioremediation results in contaminated sites.
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Affiliation(s)
- Andrea Ferrarini
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Alessandra Fracasso
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Giulia Spini
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Flavio Fornasier
- CREA - Centro Viticoltura ed Enologia, Gorizia, Italy.,SOLIOMICS srl, Udine, Italy
| | - Eren Taskin
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Maria Chiara Fontanella
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Gian Maria Beone
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Stefano Amaducci
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Edoardo Puglisi
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Piacenza, Italy
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Mitra A, Chatterjee S, Kataki S, Rastogi RP, Gupta DK. Bacterial tolerance strategies against lead toxicity and their relevance in bioremediation application. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:14271-14284. [PMID: 33528774 DOI: 10.1007/s11356-021-12583-9] [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: 07/22/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Among heavy metals, lead (Pb) is a non-essential metal having a higher toxicity and without any crucial known biological functions. Being widespread, non-biodegradable and persistent in every sphere of soil, air and water, Pb is responsible for severe health and environmental issues, which need appropriate remediation measures. However, microbes inhabiting Pb-contaminated area are found to have evolved distinctive mechanisms to successfully thrive in the Pb-contaminated environment without exhibiting any negative effects on their growth and metabolism. The defensive strategies used by bacteria to ameliorate the toxic effects of lead comprise biosorption, efflux, production of metal chelators like siderophores and metallothioneins and synthesis of exopolysaccharides, extracellular sequestration and intracellular bioaccumulation. Lead remediation technologies by employing microbes may appear as potential advantageous alternatives to the conventional physical and chemical means due to specificity, suitability for applying in situ condition and feasibility to upgrade by genetic engineering. Developing strategies by designing transgenic bacterial strain having specific metal binding properties and metal chelating proteins or higher metal adsorption ability and using bacterial activity such as incorporating plant growth-promoting rhizobacteria for improved Pb resistance, exopolysaccharide and siderophores and metallothionein-mediated immobilization may prove highly effective for formulating bioremediation vis-a-vis phytoremediation strategies.
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Affiliation(s)
- Anindita Mitra
- Bankura Christian College, Bankura, West Bengal, 722101, India
| | - Soumya Chatterjee
- Defence Research Laboratory, DRDO, Post Bag No. 02, Tezpur, Assam, 784001, India
| | - Sampriti Kataki
- Defence Research Laboratory, DRDO, Post Bag No. 02, Tezpur, Assam, 784001, India
| | - Rajesh P Rastogi
- Ministry of Environment, Forest and Climate Change, Indira Paryavaran Bhawan, Aliganj, Jorbagh Road, New Delhi, 110003, India
| | - Dharmendra K Gupta
- Ministry of Environment, Forest and Climate Change, Indira Paryavaran Bhawan, Aliganj, Jorbagh Road, New Delhi, 110003, India.
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Rai KK, Pandey N, Meena RP, Rai SP. Biotechnological strategies for enhancing heavy metal tolerance in neglected and underutilized legume crops: A comprehensive review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111750. [PMID: 33396075 DOI: 10.1016/j.ecoenv.2020.111750] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 11/27/2020] [Accepted: 11/29/2020] [Indexed: 05/15/2023]
Abstract
Contamination of agricultural land and water by heavy metals due to rapid industrialization and urbanization including various natural processes have become one of the major constraints to crop growth and productivity. Several studies have reported that to counteract heavy metal stress, plants should be able to maneuver various physiological, biochemical and molecular processes to improve their growth and development under heavy metal stress. With the advent of modern biotechnological tools and techniques it is now possible to tailor legume and other plants overexpressing stress-induced genes, transcription factors, proteins, and metabolites that are directly involved in heavy metal stress tolerance. This review provides an in-depth overview of various biotechnological approaches and/or strategies that can be used for enhancing detoxification of the heavy metals by stimulating phytoremediation processes. Synthetic biology tools involved in the engineering of legume and other crop plants against heavy metal stress tolerance are also discussed herewith some pioneering examples where synthetic biology tools that have been used to modify plants for specific traits. Also, CRISPR based genetic engineering of plants, including their role in modulating the expression of several genes/ transcription factors in the improvement of abiotic stress tolerance and phytoremediation ability using knockdown and knockout strategies has also been critically discussed.
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Affiliation(s)
- Krishna Kumar Rai
- Centre of Advance Study in Botany, Department of Botany, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Neha Pandey
- Centre of Advance Study in Botany, Department of Botany, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, Uttar Pradesh, India; Department of Botany, CMP PG College, University of Allahabad, Prayagraj, India
| | - Ram Prasad Meena
- Centre of Advance Study in Botany, Department of Botany, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, Uttar Pradesh, India; Department of Computer Science, IIT, Banaras Hindu University (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Shashi Pandey Rai
- Centre of Advance Study in Botany, Department of Botany, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, Uttar Pradesh, India.
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21
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Benidire L, Madline A, Pereira SIA, Castro PML, Boularbah A. Synergistic effect of organo-mineral amendments and plant growth-promoting rhizobacteria (PGPR) on the establishment of vegetation cover and amelioration of mine tailings. CHEMOSPHERE 2021; 262:127803. [PMID: 32755694 DOI: 10.1016/j.chemosphere.2020.127803] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/28/2020] [Accepted: 07/22/2020] [Indexed: 05/16/2023]
Abstract
Mine tailings pose a huge hazard for environmental and human health, and the establishment of vegetation cover is crucial to reduce pollutant dispersion for the surroundings. However, their hostile physicochemical conditions hamper plant growth, compromising phytoremediation strategies. This study aims to investigate the role of organo-mineral amendments and plant growth-promoting rhizobacteria (PGPR) on the improvement of mine tailings properties and Lolium perenne L. (ryegrass) growth. Plants were grown in mine tailings mixed with an agricultural soil (1:1), 10% compost, and supplied with two different inorganic amendments - rock phosphate (6%) or lime (3%), and inoculated with the rhizobacterial strains Advenellakashmirensis BKM20 (B1) and Mesorhizobium tamadayense BKM04 (B2). The application of organo-mineral amendments ameliorated tailings characteristics, which fostered plant growth and further enhanced soil fertility and microbial activity. These findings were consistent with the increase of total organic carbon levels, with the higher numbers of heterotrophic and phosphate solubilizing bacteria, and higher dehydrogenase and urease activities, found in these substrates after plant establishment. Plant growth was further boosted by PGPR inoculation, most noticeable by co-inoculation of both strains. Moreover, inoculated plants showed increased activities for several antioxidant enzymes (catalase, peroxidase, polyphenoloxidase, and glutathione reductase) which indicate a reinforced antioxidant system. The application of agricultural soil, compost and lime associated with the inoculation of a mixture of PGPR proved to enhance the establishment of vegetation cover, thus promoting the stabilization of Kettara mine tailings. Nonetheless, further studies are needed in order to confirm its effectiveness under field conditions.
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Affiliation(s)
- L Benidire
- Université Cadi-Ayyad, Faculté des Sciences et Techniques Marrakech, Laboratoire Bioressources et Sécurité Sanitaire des Aliments, BP 549, M-40000, Guéliz, Marrakech, Morocco
| | - A Madline
- Université Cadi-Ayyad, Faculté des Sciences et Techniques Marrakech, Laboratoire Bioressources et Sécurité Sanitaire des Aliments, BP 549, M-40000, Guéliz, Marrakech, Morocco
| | - S I A Pereira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - P M L Castro
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - A Boularbah
- Université Cadi-Ayyad, Faculté des Sciences et Techniques Marrakech, Laboratoire Bioressources et Sécurité Sanitaire des Aliments, BP 549, M-40000, Guéliz, Marrakech, Morocco; AgrobioSciences Program, Université Mohammed VI Polytechnique (UM6P), Benguerir, Morocco.
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Vilela LAF, de Oliveira EC. Arbuscular Mycorrhizal Fungi and Remediation Potential of Soils Contaminated by Potentially Toxic Elements. Fungal Biol 2021. [DOI: 10.1007/978-3-030-54422-5_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Dai Y, Liu R, Zhou Y, Li N, Hou L, Ma Q, Gao B. Fire Phoenix facilitates phytoremediation of PAH-Cd co-contaminated soil through promotion of beneficial rhizosphere bacterial communities. ENVIRONMENT INTERNATIONAL 2020; 136:105421. [PMID: 31884414 DOI: 10.1016/j.envint.2019.105421] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/10/2019] [Accepted: 12/13/2019] [Indexed: 05/13/2023]
Abstract
Pot experiments were conducted in a growth chamber to evaluate the phytoremediation efficiency and rhizosphere regulation mechanism of Fire Phoenix (a mixture of Festuca L.) in polycyclic aromatic hydrocarbon-cadmium (PAH-Cd) co-contaminated soils. Plant biomass, removal rates of PAHs and Cd, soil enzyme activity, and soil bacterial community were determined. After 150 days of planting, the removal rates of the total 4 PAHs and Cd reached 64.57% and 40.93% in co-contaminated soils with low-PAH (104.79-144.87 mg·kg-1), and 68.29% and 25.40% in co-contaminated soils with high-PAH (169.17-197.44 mg·kg-1), respectively. The polyphenol oxidase (PPO) activity decreased in soils having Fire Phoenix, while the dehydrogenase (DHO) activity increased as the changes of DHO activity had a strong positive correlation with the removal rates of PAHs and Cd in the low-PAH soils (r = 0.862 (P < 0.006) and 0.913 (P < 0.002), respectively). Meanwhile, successional changes in the bacterial communities were detected using high-throughput 454 Gs-FLX pyrosequencing of the 16S rRNA, and these changes were especially apparent for the co-contaminated soils with the low PAH concentration. The Fire Phoenix could promote the growth of Mycobacterium, Dokdonella, Gordonia and Kaistobacter, which played important roles in PAHs degradation or Cd dissipation. These results indicated that Fire Phoenix could effectively motivate the soil enzyme and bacterial community and enhance the potential for phytoremediation of PAH-Cd co-contaminated soils.
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Affiliation(s)
- Yuanyuan Dai
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Liu
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China.
| | - Yuemei Zhou
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
| | - Na Li
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liqun Hou
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Ma
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, USA
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Responses of Rhizosphere Fungal Communities to the Sewage Sludge Application into the Soil. Microorganisms 2019; 7:microorganisms7110505. [PMID: 31671795 PMCID: PMC6920848 DOI: 10.3390/microorganisms7110505] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/21/2019] [Accepted: 10/28/2019] [Indexed: 11/17/2022] Open
Abstract
Due to the increasing sewage sludge production in the world and problems with its disposal, an application of sludge to the soil appears to be a suitable solution considering its fertilizer properties and ability to improve the soil physical conditions. On the other hand, the sludge may also contain undesirable and toxic substances. Since soil microorganisms are sensitive to environmental changes, they can be used as indicators of soil quality. In this study, we used sewage sludge (SS) from two municipal wastewater treatment plants (SS-A and SS-B) in the dose of 5 t/ha and 15 t/ha in order to determine possible changes in the fungal community diversity, especially arbuscular mycorrhizal fungi (AMF), in the rhizosphere of Arundo donax L. Rhizosphere samples were collected in summer and autumn for two consecutive years and the fungal diversity was examined using terminal restriction fragment length polymorphism and 18S rDNA sequencing. Fungal alpha diversity was more affected by SS-A than SS-B probably due to the higher heavy metal content. However, based on principal component analysis and ANOSIM, significant changes in overall fungal diversity were not observed. Simultaneously, 18S rDNA sequencing showed that more various fungal taxa were detected in the sample with sewage sludge than in the control. Glomus sp. as a representative of AMF was the most represented. Moreover, Funneliformis in both samples and Rhizophagus in control with Septoglomus in the sludge sample were other representatives of AMF. Our results indicate that the short-term sewage sludge application into the soil does not cause a shift in the fungal community composition.
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Mahohi A, Raiesi F. Functionally dissimilar soil organisms improve growth and Pb/Zn uptake by Stachys inflata grown in a calcareous soil highly polluted with mining activities. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 247:780-789. [PMID: 31299554 DOI: 10.1016/j.jenvman.2019.06.130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 06/26/2019] [Accepted: 06/30/2019] [Indexed: 06/10/2023]
Abstract
Micro- and macro-organisms are key components of sustainable soil-plant systems; and are involved in plant growth stimulation and accumulation of heavy metals in the plant, with great contribution to phytoremediation of heavy metal-contaminated soils. However, the combined effect of arbuscular mycorrhizal fungi (AMF), plant growth-promoting rhizobacteria (PGPR) and earthworms on plant growth and metal uptake is not yet clear. The main objective of this study was to examine the combined influences of these soil organisms on the growth and metal uptake by a native plant species (Stachys inflata), and subsequently on potential phytoremediation in a soil highly polluted with Pb/Zn mining activities. Metal tolerant AMF, PGPR and earthworms were used either alone or in combination in a factorial pot experiment under greenhouse conditions for 4 months. Inoculation of AMF, PGPR and earthworm led to an increase of soil Pb/Zn availability with the greatest Zn availability (about 2 times) with triple inoculation of all the organisms and the highest Pb availability (about 3 times) with co-inoculation of PGPR and earthworms. Triple inoculation of soil organisms increased the total plant biomass 3 times, total Pb uptake 6 times and total Zn uptake 5 times as compared with the uninoculated plants. The growth-stimulating effect of combined soil organisms was much greater than that of individual or dually-inoculated organisms. These results showed that it is possible to use the combination of metal-tolerant soil organisms as a potential bioaugmentation tool to accelerate metal phytoremediation rate in calcareous soils polluted by Pb/Zn mining activity under arid conditions. This could occur as a consequence of the synergistic effects of AMF, PGPR and earthworms on metal availability in the soil, S. inflata growth, metal tolerance and uptake. However, it would practically require more than hundreds of cropping cycles (360 for Pb and 250 for Zn) to achieve metal maximum permissible limits under the conditions of this pot experiment.
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Affiliation(s)
- Ali Mahohi
- Department of Soil Science and Engineering, Faculty of Agriculture, Shahrekord, University, P.O.Box 115, Shahrekord, Iran
| | - Fayez Raiesi
- Department of Soil Science and Engineering, Faculty of Agriculture, Shahrekord, University, P.O.Box 115, Shahrekord, Iran.
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26
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Manzoor M, Abid R, Rathinasabapathi B, De Oliveira LM, da Silva E, Deng F, Rensing C, Arshad M, Gul I, Xiang P, Ma LQ. Metal tolerance of arsenic-resistant bacteria and their ability to promote plant growth of Pteris vittata in Pb-contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 660:18-24. [PMID: 30639714 DOI: 10.1016/j.scitotenv.2019.01.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 01/02/2019] [Accepted: 01/02/2019] [Indexed: 06/09/2023]
Abstract
Soils contaminated with Pb and As are difficult to remediate. In this study, the utility of coupling As-hyperaccumulator Pteris vittata with metal-resistant rhizobacteria was explored. Siderophore-producing and P-solubilizing As-resistant bacteria from the P. vittata rhizosphere were screened for resistance to multiple metals. Results indicated Pseudomonas spp. strain PG-12 was most efficient in resisting multiple metals, i.e., up to 0.6 mM Cd and 10 mM Pb. Amplification of gene fragments encoding various metal efflux transporters (PbrA and CadA2) from genomic DNA of PG-12 suggested that metal efflux might play a role in its metal resistance and detoxification. In addition, PG-12 produced significant levels of plant growth hormones including 17.4 μg mL-1 indole acetic acid and 3.54 μg mL-1 gibberellin. P. vittata sporophytes inoculated with PG-12 were grown in Pb-contaminated medium and exhibited improved growth, increased P uptake, and reduced Pb uptake into plant tissue compared to the control. Results demonstrated that viable PG-12 cells were responsible for Pb immobilization and plant growth enhancement in P. vittata. The ability of PG-12 cells to solubilize P and display resistance to multiple metals combined with the production of plant hormones indole acetic acid and gibberellin make PG-12 a suitable candidate for plant growth promotion in metal-contaminated soil.
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Affiliation(s)
- Maria Manzoor
- Research Center for Soil Contamination and Environmental Remediation, Southwest Forestry University, Kunming 650224, China; Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA; Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Rafia Abid
- Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA; Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Bala Rathinasabapathi
- Horticultural Sciences Department, University of Florida, Gainesville, FL 32611, USA
| | - Letuzia M De Oliveira
- Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA
| | - Evandro da Silva
- Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA
| | - Fenglin Deng
- Research Center for Soil Contamination and Environmental Remediation, Southwest Forestry University, Kunming 650224, China
| | - Christopher Rensing
- Research Center for Soil Contamination and Environmental Remediation, Southwest Forestry University, Kunming 650224, China; Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, China
| | - Muhammad Arshad
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Iram Gul
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Ping Xiang
- Research Center for Soil Contamination and Environmental Remediation, Southwest Forestry University, Kunming 650224, China.
| | - Lena Q Ma
- Research Center for Soil Contamination and Environmental Remediation, Southwest Forestry University, Kunming 650224, China; Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA.
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27
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Pramanik K, Mitra S, Sarkar A, Maiti TK. Alleviation of phytotoxic effects of cadmium on rice seedlings by cadmium resistant PGPR strain Enterobacter aerogenes MCC 3092. JOURNAL OF HAZARDOUS MATERIALS 2018; 351:317-329. [PMID: 29554529 DOI: 10.1016/j.jhazmat.2018.03.009] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 02/19/2018] [Accepted: 03/06/2018] [Indexed: 05/28/2023]
Abstract
Heavy metal resistant PGPR mediated bioremediation, phytostimulation and stress alleviation is an eco-friendly method for sustainable agriculture in the metal contaminated soil. The isolation of such PGPR is highly demanding to reduce heavy metals in contaminated cultivated fields for agricultural benefit. The present study was successful to isolate a potent multi-heavy metal resistant PGPR strain, identified as Enterobacter aerogenes strain K6 based on MALDI-TOF MS, FAME analysis and 16S rDNA sequence homology, from rice rhizosphere contaminated with a variety of heavy metals/metalloid near industrial area. The strain exhibited high degree of resistance to Cd2+, Pb2+ and As3+ upto 4000 μg/mL, 3800 μg/mL and 1500 μg/mL respectively. Intracellular Cd accumulation of this strain was evidenced by AAS-SEM-TEM-EDX-XRF studies. Moreover, it showed several important PGP traits like IAA production, nitrogen fixation, phosphate solubilization, ACC deaminase activity even under high Cd stress (upto 3000 μg/mL). The combined effect of Cd resistance and PGP activities of this strain was manifested to the significant (p < 0.05) growth promotion of rice seedling under Cd stress by reducing oxidative stress (through antioxidants), stress ethylene and Cd uptake in seedlings. Thus K6 strain conferred Cd-tolerance in rice seedlings and could be applied as PGPR in contaminated fields.
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Affiliation(s)
- Krishnendu Pramanik
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India
| | - Soumik Mitra
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India
| | - Anumita Sarkar
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India; Department of Botany, Government General Degree College, Singur, West Bengal, 712409, India
| | - Tushar Kanti Maiti
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India.
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Ogunkunle CO, Varun M, Ogundele IG, Olorunmaiye KS, Paul MS. Citrus Epicarp-Derived Biochar Reduced Cd Uptake and Ameliorates Oxidative Stress in Young Abelmoschus esculentus (L.) Moench (okra) Under Low Cd Stress. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 100:827-833. [PMID: 29666898 DOI: 10.1007/s00128-018-2339-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
Due to the important role of biochar (BC) in reducing metal-toxicity in plants, this study was aimed at assessing the potential of citrus epicarp-derived BC in ameliorating Cd toxicity in young Abelmoschus esculentus (okra) under low Cd toxicity. Okra was grown in soil amended with BC at four treatment levels for 49 days as follows: control (A), sole 1.4 mg Cd/kg-spiked soil (B), 1.4 mg Cd/kg-spiked soil + 1% BC (C) and 1.4 mg Cd/kg-spiked soil + 3% BC (D). The results showed a dose-dependent reduction in shoot accumulation of Cd due to the BC application. In addition, compared to control and sole Cd-amended soil, BC treatments (both at 1% and 3% w/w) decreased the oxidative stress, and enhanced activities of enzymatic and non-enzymatic antioxidants in the young okra. Generally, the application of BC to the soil was effective in ameliorating the Cd-induced oxidative stress in okra with limited shoot bioaccumulation of Cd.
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Affiliation(s)
- Clement O Ogunkunle
- Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria.
| | - Mayank Varun
- Department of Botany, St. John's College, Agra, Uttar Pradesh, 282 002, India
| | - Iyanuoluwa G Ogundele
- Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria
| | - Kehinde S Olorunmaiye
- Plant Physiology and Biochemistry Unit, Department of Plant Biology, University of Ilorin, Ilorin, 240003, Nigeria
| | - Manoj S Paul
- Department of Botany, St. John's College, Agra, Uttar Pradesh, 282 002, India
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Khan WU, Yasin NA, Ahmad SR, Ali A, Ahmad A, Akram W, Faisal M. Role of Burkholderia cepacia CS8 in Cd-stress alleviation and phytoremediation by Catharanthus roseus. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:581-592. [PMID: 29688047 DOI: 10.1080/15226514.2017.1405378] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The current study was performed to assess the effect of Burkholderia cepacia CS8 on the phytoremediation of cadmium (Cd) by Catharanthus roseus grown in Cd-contaminated soil. The plants cultivated in Cd amended soil showed reduced growth, dry mass, gas-exchange capacity, and chlorophyll contents. Furthermore, the plants exhibited elevated levels of malondialdehyde (MDA) and hydrogen peroxide (H2O2) under Cd stress. The bacterized plants showed higher shoot length, root length; fresh and dry weight. The improved stress tolerance in inoculated plants was attributed to the reduced quantity of MDA and H2O2, enhanced synthesis of protein, proline, phenols, flavonoids, and improved activity of antioxidant enzymes including peroxidase, superoxide dismutase, ascorbate peroxidase, and catalase. Similarly, the 1-aminocyclopropane-1-carboxylate deaminase activity, phosphate solubilization, auxin, and siderophore production capability of B. cepacia CS8 improved growth and stress alleviation in treated plants. The bacterial inoculation enhanced the amount of water extractable Cd from soil. Furthermore, the inoculated plants showed higher bioconcentration factor and translocation factor. The current study exhibits that B. cepacia CS8 improves stress alleviation and phytoextraction potential of C. roseus plants growing under Cd stress.
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Affiliation(s)
- Waheed Ullah Khan
- a College of Earth and Environmental Sciences , University of the Punjab , Lahore , Pakistan
| | - Nasim Ahmad Yasin
- b Senior Superintendent Garden, RO-II Office , University of the Punjab , Lahore , Pakistan
| | - Sajid Rashid Ahmad
- a College of Earth and Environmental Sciences , University of the Punjab , Lahore , Pakistan
| | - Aamir Ali
- c Department of Botany , University of Sargodha , Sargodha , Pakistan
| | - Aqeel Ahmad
- d Research Scholar , Institute for Medicinal Plants, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan , China
| | - Waheed Akram
- d Research Scholar , Institute for Medicinal Plants, College of Plant Science and Technology, Huazhong Agricultural University , Wuhan , China
| | - Muhammad Faisal
- e Department of Microbiology and Molecular Genetics , University of the Punjab , Lahore , Pakistan
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Chaturvedi R, Favas P, Pratas J, Varun M, Paul MS. Assessment of edibility and effect of arbuscular mycorrhizal fungi on Solanum melongena L. grown under heavy metal(loid) contaminated soil. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 148:318-326. [PMID: 29091834 DOI: 10.1016/j.ecoenv.2017.10.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/17/2017] [Accepted: 10/23/2017] [Indexed: 05/27/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) aids in plant establishment at heavy metal(loid) (HM) contaminated soils, strengthening plant defense system along with promoting growth. A pot experiment was carried out to evaluate the effect of AMF on eggplants grown under HM stress. Further, the potential health risks of HM exposure to the humans via dietary intake of eggplant were also estimated. Results showed that AMF application improved growth, biomass and antioxidative defense response of plants against HM stress. Significant difference (p ≤ 0.001) in parameters under study was found on increasing metal dose and on application of AMF. Among metal(loid)s maximum uptake was recorded for Pb (29.64mgkg-1 in roots; 23.08mgkg-1 in shoot) followed by As (3.84mgkg-1 in roots; 8.20mgkg-1 in shoot) and, Cd (0.96mgkg-1 in roots; 2.12mgkg-1 in shoot). Based on the accumulation of HM in edible part, Hazard Quotient (HQ) was calculated. HQ was found to be > 1 for Pb, which highlights the risks associated with consumption of Eggplants grown on Pb contaminated soil. However this potential, which was further enhanced by application of AMF, can be harnessed for on-site remediation of Pb contaminated soils. The content of Cd and As in the edible part was found to be within safe limits (HQ < 1) when compared to chronic reference dose stated by USEPA.
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Affiliation(s)
- Ritu Chaturvedi
- Department of Botany, St. John's College, Agra, U.P. 282 002, India.
| | - Paulo Favas
- School of Life Sciences and the Environment, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal; MARE - Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, 3000-517 Coimbra, Portugal
| | - João Pratas
- MARE - Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, 3000-517 Coimbra, Portugal; Department of Earth Sciences, Faculty of Sciences and Technology, University of Coimbra, 3001-401 Coimbra, Portugal; Instituto do Petróleo e Geologia (Institute of Petroleum and Geology), Rua Delta 1, Aimutin Comoro, Dili, Timor-Leste
| | - Mayank Varun
- Department of Botany, St. John's College, Agra, U.P. 282 002, India
| | - Manoj S Paul
- Department of Botany, St. John's College, Agra, U.P. 282 002, India
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Dhusia K, Bajpai A, Ramteke PW. Overcoming antibiotic resistance: Is siderophore Trojan horse conjugation an answer to evolving resistance in microbial pathogens? J Control Release 2017; 269:63-87. [PMID: 29129658 DOI: 10.1016/j.jconrel.2017.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/30/2017] [Accepted: 11/01/2017] [Indexed: 01/11/2023]
Abstract
Comparative study of siderophore biosynthesis pathway in pathogens provides potential targets for antibiotics and host drug delivery as a part of computationally feasible microbial therapy. Iron acquisition using siderophore models is an essential and well established model in all microorganisms and microbial infections a known to cause great havoc to both plant and animal. Rapid development of antibiotic resistance in bacterial as well as fungal pathogens has drawn us at a verge where one has to get rid of the traditional way of obstructing pathogen using single or multiple antibiotic/chemical inhibitors or drugs. 'Trojan horse' strategy is an answer to this imperative call where antibiotic are by far sneaked into the pathogenic cell via the siderophore receptors at cell and outer membrane. This antibiotic once gets inside, generates a 'black hole' scenario within the opportunistic pathogens via iron scarcity. For pathogens whose siderophore are not compatible to smuggle drug due to their complex conformation and stiff valence bonds, there is another approach. By means of the siderophore biosynthesis pathways, potential targets for inhibition of these siderophores in pathogenic bacteria could be achieved and thus control pathogenic virulence. Method to design artificial exogenous siderophores for pathogens that would compete and succeed the battle of intake is also covered with this review. These manipulated siderophore would enter pathogenic cell like any other siderophore but will not disperse iron due to which iron inadequacy and hence pathogens control be accomplished. The aim of this review is to offer strategies to overcome the microbial infections/pathogens using siderophore.
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Affiliation(s)
- Kalyani Dhusia
- Deptartment of Computational Biology and Bioinformatics, Jacob Institute of Biotechnology and Bio-Engineering, Sam Higginbottom University of Agriculture, Technology and Sciences (SHUATS), Allahabad-211007 (U.P.), India
| | - Archana Bajpai
- Laboratory for Disease Systems Modeling, Center for Integrative Medical Sciences, RIKEN, Yokohama City, Kanagawa, 230-0045, Japan
| | - P W Ramteke
- Deptartment of Computational Biology and Bioinformatics, Jacob Institute of Biotechnology and Bio-Engineering, Sam Higginbottom University of Agriculture, Technology and Sciences (SHUATS), Allahabad-211007 (U.P.), India
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Upadhyay N, Vishwakarma K, Singh J, Mishra M, Kumar V, Rani R, Mishra RK, Chauhan DK, Tripathi DK, Sharma S. Tolerance and Reduction of Chromium(VI) by Bacillus sp. MNU16 Isolated from Contaminated Coal Mining Soil. FRONTIERS IN PLANT SCIENCE 2017; 8:778. [PMID: 28588589 PMCID: PMC5438964 DOI: 10.3389/fpls.2017.00778] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 04/25/2017] [Indexed: 05/12/2023]
Abstract
The bacterium MNU16 was isolated from contaminated soils of coal mine and subsequently screened for different plant growth promoting (PGP) activities. The isolate was further identified by 16S rRNA sequencing as Bacillus subtilis MNU16 with IAA concentration (56.95 ± 0.43 6μg/ml), siderophore unit (9.73 ± 2.05%), phosphate solubilization (285.13 ± 1.05 μg/ml) and ACC deaminase activity (116.79 ± 0.019 μmoles α-ketobutyrate/mg/24 h). Further, to evaluate the metal resistance profile of bacterium, the isolate was screened for multi-metal resistance (viz. 900 mg/L for Cr, 600 mg/L for As, 700 mg/L for Ni and 300 mg/L for Hg). Additionally, the resistance pattern of B. subtilis MNU16 against Cr(VI) (from 50 to 300 mg/L) treatments were evaluated. An enriched population was observed at 0-200 mg/L Cr(VI) concentration while slight reductions were observed at 250 and 300 mg/L Cr(VI). Further, the chromium reduction ability at 50 mg/L of Cr(VI) highlighted that the bacterium B. subtilis MNU16 reduced 75% of Cr(VI) to 13.23 mg/L within 72 h. The localization of electron dense precipitates was observed in the TEM images of B. subtilis MNU16 which is might be due to the reduction of Cr(VI) to Cr(III). The data of fluorescence microscopy and flow cytometry with respect to Cr(VI) treatments (50-300 mg/L) showed a similar pattern and clearly revealed the less toxic effect of hexavalent chromium upto 200 mg/L Cr(VI) concentration. However, toxicity effects were more pronounced at 300 mg/L Cr(VI). Therefore, the present study suggests that the plant growth promoting potential and resistance efficacy of B. subtilis MNU16 will go a long way in developing an effective bioremediation approach for Cr(VI) contaminated soils.
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Affiliation(s)
- Neha Upadhyay
- Department of Biotechnology, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Kanchan Vishwakarma
- Department of Biotechnology, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Jaspreet Singh
- Department of Biotechnology, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Mitali Mishra
- Department of Biotechnology, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Vivek Kumar
- Department of Biotechnology, Himalayan Institute of Biosciences, Swami Rama Himalayan UniversityDehradun, India
| | - Radha Rani
- Department of Biotechnology, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Rohit K. Mishra
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Devendra K. Chauhan
- D D Plant Interdisciplinary Research Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Durgesh K. Tripathi
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
| | - Shivesh Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of Technology AllahabadAllahabad, India
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