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Zhou H, Wang ZY, Li C, Yuan HW, Hu L, Zeng P, Yang WT, Liao BH, Gu JF. Straw removal reduces Cd availability and rice Cd accumulation in Cd-contaminated paddy soil: Cd fraction, soil microorganism structure and porewater DOC and Cd. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135189. [PMID: 39013317 DOI: 10.1016/j.jhazmat.2024.135189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 07/08/2024] [Accepted: 07/11/2024] [Indexed: 07/18/2024]
Abstract
The impacts of straw removal on rice Cd absorption, behaviour of Cd and microbial community in rhizosphere soil were investigated in paddy fields over two consecutive seasons. The results of the experiments in two fields revealed that straw removal promoted the transformation of soil Cd from acid-extractable and oxidisable fraction to residual fraction and reduced soil DTPA-Cd content with the reduction in DOC and Cd ions in soil porewater, thereby decreasing Cd content in rice. Specifically, the Cd content in brown rice of early rice was below 0.2 mg·kg-1 when all rice straw and roots were removed in the slightly Cd-contaminated soils. The α-diversity of soil microbial communities was less influenced by continuous straw removal, β-diversity was altered and the relative abundances of Anaeromyxobacter, Methylocystis and Mycobacterium microbes were increased. Redundancy analysis and network analysis exhibited that soil pH predominantly influenced the microbial community. Path analysis revealed that the Cd content in brown rice could be directly influenced by the soil Total-Cd and DTPA-Cd, as well as soil pH and OM. Straw removal, including roots removal, is an economical and effective technique to reduce Cd accumulation in rice plants.
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Affiliation(s)
- Hang Zhou
- College of Life and Environment Sciences, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Provincial Soil Pollution Remediation and Carbon Fixation Engineering Technology Research Center, Changsha 410004, China; Yuelushan Laboratory, Changsha 410000, China.
| | - Zi-Yu Wang
- College of Life and Environment Sciences, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Chang Li
- College of Life and Environment Sciences, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Hai-Wei Yuan
- Hunan Provincial Soil Pollution Remediation and Carbon Fixation Engineering Technology Research Center, Changsha 410004, China; Hunan Huanbaoqiao Ecology and Environment Engineering Co., Ltd., Changsha 410205, China.
| | - Lu Hu
- Hunan Provincial Soil Pollution Remediation and Carbon Fixation Engineering Technology Research Center, Changsha 410004, China; Hunan Huanbaoqiao Ecology and Environment Engineering Co., Ltd., Changsha 410205, China.
| | - Peng Zeng
- College of Life and Environment Sciences, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Provincial Soil Pollution Remediation and Carbon Fixation Engineering Technology Research Center, Changsha 410004, China; Yuelushan Laboratory, Changsha 410000, China.
| | - Wen-Tao Yang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China.
| | - Bo-Han Liao
- College of Life and Environment Sciences, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Jiao-Feng Gu
- College of Life and Environment Sciences, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Provincial Soil Pollution Remediation and Carbon Fixation Engineering Technology Research Center, Changsha 410004, China; Hunan Huanbaoqiao Ecology and Environment Engineering Co., Ltd., Changsha 410205, China; Yuelushan Laboratory, Changsha 410000, China.
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Riseh RS, Vazvani MG, Hajabdollahi N, Thakur VK. Bioremediation of Heavy Metals by Rhizobacteria. Appl Biochem Biotechnol 2023; 195:4689-4711. [PMID: 36287331 PMCID: PMC10354140 DOI: 10.1007/s12010-022-04177-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2022] [Indexed: 11/02/2022]
Abstract
Heavy elements accumulate rapidly in the soil due to industrial activities and the industrial revolution, which significantly impact the morphology, physiology, and yield of crops. Heavy metal contamination will eventually affect the plant tolerance threshold and cause changes in the plant genome and genetic structure. Changes in the plant genome lead to changes in encoded proteins and protein sequences. Consuming these mutated products can seriously affect human and animal health. Bioremediation is a process that can be applied to reduce the adverse effects of heavy metals in the soil. In this regard, bioremediation using plant growth-promoting rhizobacteria (PGPRs) as beneficial living agents can help to neutralize the negative interaction between the plant and the heavy metals. PGPRs suppress the adverse effects of heavy metals and the negative interaction of plant-heavy elements by different mechanisms such as biological adsorption and entrapment of heavy elements in extracellular capsules, reduction of metal ion concentration, and formation of complexes with metal ions inside the cell.
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Affiliation(s)
- Roohallah Saberi Riseh
- Department of Plant Protection, Faculty of Agriculture, Vali-E-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan, 7718897111 Iran
| | - Mozhgan Gholizadeh Vazvani
- Department of Plant Protection, Faculty of Agriculture, Vali-E-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan, 7718897111 Iran
| | - Najmeh Hajabdollahi
- Department of Plant Protection, Faculty of Agriculture, Vali-E-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan, 7718897111 Iran
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, Scotland’s Rural College (SRUC), Edinburgh, EH9 3JG UK
- School of Engineering, University of Petroleum & Energy Studies (UPES), Dehradun, 248007 India
- Centre for Research and Development, Chandigarh University, Mohali, 140413 Punjab India
- Department of Biotechnology, Graphic Era Deemed to Be University, Dehradun, 248002 Uttarakhand India
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Singh AD, Khanna K, Kour J, Dhiman S, Bhardwaj T, Devi K, Sharma N, Kumar P, Kapoor N, Sharma P, Arora P, Sharma A, Bhardwaj R. Critical review on biogeochemical dynamics of mercury (Hg) and its abatement strategies. CHEMOSPHERE 2023; 319:137917. [PMID: 36706814 DOI: 10.1016/j.chemosphere.2023.137917] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 12/21/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Mercury (Hg) is among the naturally occurring heavy metal with elemental, organic, and inorganic distributions in the environment. Being considered a global pollutant, high pools of Hg-emissions ranging from >6000 to 8000 Mg Hg/year get accumulated by the natural and anthropogenic activities in the atmosphere. These toxicants have high persistence, toxicity, and widespread contamination in the soil, water, and air resources. Hg accumulation inside the plant parts amplifies the traces of toxic elements in the linking food chains, leads to Hg exposure to humans, and acts as a potential genotoxic, neurotoxic and carcinogenic entity. However, excessive Hg levels are equally toxic to the plant system and severely disrupt the physiological and metabolic processes in plants. Thus, a plausible link between Hg-concentration and its biogeochemical behavior is highly imperative to analyze the plant-soil interactions. Therefore, it is requisite to bring these toxic contaminants in between the acceptable limits to safeguard the environment. Plants efficiently incorporate or absorb the bioavailable Hg from the soil thus a constructive understanding of Hg uptake, translocation/sequestration involving specific heavy metal transporters, and detoxification mechanisms are drawn. Whereas recent investigations in biological remediation of Hg provide insights into the potential associations between the plants and microbes. Furthermore, intense research on Hg-induced antioxidants, protein networks, metabolic mechanisms, and signaling pathways is required to understand these bioremediations techniques. This review sheds light on the mercury (Hg) sources, pollution, biogeochemical cycles, its uptake, translocation, and detoxification methods with respect to its molecular approaches in plants.
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Affiliation(s)
- Arun Dev Singh
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India.
| | - Kanika Khanna
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Jaspreet Kour
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Shalini Dhiman
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Tamanna Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Kamini Devi
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Neerja Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Pardeep Kumar
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Nitika Kapoor
- P.G. Department of Botany, Hans Raj Mahila Maha Vidyalaya, Jalandhar, Punjab, India
| | - Priyanka Sharma
- School of Bioengineering Sciences and Research, MIT-ADT University, Pune, Maharashtra, India
| | - Priya Arora
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Anket Sharma
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Renu Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India.
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4
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Liu A, Wang W, Chen X, Zheng X, Fu W, Wang G, Ji J, Guan C. Phytoremediation of DEHP and heavy metals co-contaminated soil by rice assisted with a PGPR consortium: Insights into the regulation of ion homeostasis, improvement of photosynthesis and enrichment of beneficial bacteria in rhizosphere soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120303. [PMID: 36181940 DOI: 10.1016/j.envpol.2022.120303] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/20/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
The coexistence of di (2-ethylhexyl) phthalate (DEHP), Cd, and Zn poses a serious challenge to soil ecosystems. This study aimed to evaluate the phytoremediation potential of rice assisted with a plant growth promoting rhizobacteria (PGPR) consortium for the remediation of DEHP, Cd, and Zn co-contaminated soil. The consortium consisted of four bacterial strains, all of which exhibited Cd-Zn resistance and DEHP degradability. The results showed that the rice assisted by the bacterial consortium dissipated 86.1% DEHP while removing 76.0% Cd2+ and 92.2% Zn2+ from soil within 30 d. The presence of the PGPR consortium promoted plant growth and improved soil enzymatic activity, which may have helped enhance the removal of DEHP and heavy metals from the soil. Moreover, the application of the consortium modified the bacterial community and increased the relative abundance of bacteria related to DEHP degradation (Sphingomonas, Xanthobacteraceae), heavy metal immobilization (Massilia), and soil nutrient cycling (Nitrospira, Vicinamibacterales), which promoted plant growth and the removal of DEHP and heavy metals from soil. Notably, the DEHP and heavy metal contents in rice decreased substantially during the phytoremediation process. Therefore, the PGPR consortium could be beneficial for enhancing the removal of DEHP and heavy metals from the soil, without inducing the accumulation of these pollutants in rice. In general, this study confirmed that the combined use of rice and the PGPR consortium could remedy DEHP and heavy metal co-contaminated soil economically and ecologically without simultaneously posing risks for rice consumption.
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Affiliation(s)
- Anran Liu
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Wenjing Wang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Xiancao Chen
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Xiaoyan Zheng
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Wenting Fu
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Gang Wang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Jing Ji
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Chunfeng Guan
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China.
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5
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Jamil F, Mukhtar H, Fouillaud M, Dufossé L. Rhizosphere Signaling: Insights into Plant-Rhizomicrobiome Interactions for Sustainable Agronomy. Microorganisms 2022; 10:microorganisms10050899. [PMID: 35630345 PMCID: PMC9147336 DOI: 10.3390/microorganisms10050899] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 02/01/2023] Open
Abstract
Rhizospheric plant-microbe interactions have dynamic importance in sustainable agriculture systems that have a reduced reliance on agrochemicals. Rhizosphere signaling focuses on the interactions between plants and the surrounding symbiotic microorganisms that facilitate the development of rhizobiome diversity, which is beneficial for plant productivity. Plant-microbe communication comprises intricate systems that modulate local and systemic defense mechanisms to mitigate environmental stresses. This review deciphers insights into how the exudation of plant secondary metabolites can shape the functions and diversity of the root microbiome. It also elaborates on how rhizosphere interactions influence plant growth, regulate plant immunity against phytopathogens, and prime the plant for protection against biotic and abiotic stresses, along with some recent well-reported examples. A holistic understanding of these interactions can help in the development of tailored microbial inoculants for enhanced plant growth and targeted disease suppression.
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Affiliation(s)
- Fatima Jamil
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan;
| | - Hamid Mukhtar
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan;
- Correspondence: (H.M.); (M.F.); Tel.: +92-333-424-5581 (H.M.); +262-262-483-363 (M.F.)
| | - Mireille Fouillaud
- CHEMBIOPRO Chimie et Biotechnologie des Produits Naturels, Faculté des Sciences et Technologies, Université de la Réunion, F-97490 Sainte-Clotilde, Ile de La Réunion, France
- Correspondence: (H.M.); (M.F.); Tel.: +92-333-424-5581 (H.M.); +262-262-483-363 (M.F.)
| | - Laurent Dufossé
- CHEMBIOPRO Chimie et Biotechnologie des Produits Naturels, ESIROI Département Agroalimentaire, Université de la Réunion, F-97490 Sainte-Clotilde, Ile de La Réunion, France;
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Priyadarshanee M, Chatterjee S, Rath S, Dash HR, Das S. Cellular and genetic mechanism of bacterial mercury resistance and their role in biogeochemistry and bioremediation. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:126985. [PMID: 34464861 DOI: 10.1016/j.jhazmat.2021.126985] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
Mercury (Hg) is a highly toxic element that occurs at low concentrations in nature. However, various anthropogenic and natural sources contribute around 5000 to 8000 metric tons of Hg per year, rapidly deteriorating the environmental conditions. Mercury-resistant bacteria that possess the mer operon system have the potential for Hg bioremediation through volatilization from the contaminated milieus. Thus, bacterial mer operon plays a crucial role in Hg biogeochemistry and bioremediation by converting both reactive inorganic and organic forms of Hg to relatively inert, volatile, and monoatomic forms. Both the broad-spectrum and narrow-spectrum bacteria harbor many genes of mer operon with their unique definitive functions. The presence of mer genes or proteins can regulate the fate of Hg in the biogeochemical cycle in the environment. The efficiency of Hg transformation depends upon the nature and diversity of mer genes present in mercury-resistant bacteria. Additionally, the bacterial cellular mechanism of Hg resistance involves reduced Hg uptake, extracellular sequestration, and bioaccumulation. The presence of unique physiological properties in a specific group of mercury-resistant bacteria enhances their bioremediation capabilities. Many advanced biotechnological tools also can improve the bioremediation efficiency of mercury-resistant bacteria to achieve Hg bioremediation.
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Affiliation(s)
- Monika Priyadarshanee
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Shreosi Chatterjee
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Sonalin Rath
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Hirak R Dash
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India
| | - Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology Rourkela, Rourkela 769 008, Odisha, India.
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Kalu CM, Ogola HJO, Selvarajan R, Tekere M, Ntushelo K. Correlations Between Root Metabolomics and Bacterial Community Structures in the Phragmites australis Under Acid Mine Drainage-Polluted Wetland Ecosystem. Curr Microbiol 2021; 79:34. [PMID: 34962589 PMCID: PMC8714630 DOI: 10.1007/s00284-021-02748-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 12/17/2021] [Indexed: 11/26/2022]
Abstract
Despite root microecology playing critical role in plant growth and fidelity, relatively few studies have focused on the link between the microbial communities and root metabolome in the aquatic macrophytes under heavy metal (HM) pollution. Using high-throughput metagenomic sequencing, targeted metabolomics and community-level physiological profile analyses, we investigated the symbiotic associations between Phragmites australis with rhizospheric bacterial communities under differing acid mine drainage (AMD) pollution. Results indicated that AMD pollution and root localization significantly affected root metabolome profiles. Higher accumulation of adenosine monophosphate, inosine, methionine, carnitine and dimethylglycine were observed in the rhizosphere under AMD than non-AMD habitat. Overall, the bacterial diversity and richness, and functional (metabolic) diversity were lower under high-AMD pollution. While non-AMD site was enriched with members of phylum Firmicutes, Proteobacteria were the most abundant taxa in the rhizosphere and endosphere under AMD-polluted sites. Further, plant growth promoting rhizobacteria (Rhizobium, Delftia, Bradyrhizobium, and Mesorhizobium) and metal-tolerant bacteria (Bacillus, Arthrobacter, Massilia and Methylocystis) were most abundant in AMD-polluted than non-AMD habitat. Finally, pH, TDS (total dissolved solids), Cu, Cr, Fe, and Zn content were the key environmental factors that strongly contributed to the spatial perturbation of rhizospheric metabolites, proteobacterial and acidobacterial taxa. Overall, the study linked the differential endospheric and rhizospheric bacterial community and metabolite profiles in P. australis under AMD environment and provided insights into HM adaptability and phytoremediation potential.
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Affiliation(s)
- Chimdi M Kalu
- Department of Agriculture and Animal Health, University of South Africa, Florida Science Campus, Roodepoort, 1709, South Africa.
| | - Henry J O Ogola
- Department of Environmental Science, University of South Africa, Florida Science Campus, Roodepoort, 1709, South Africa
- School of Agricultural and Food Sciences, Jaramogi Oginga Odinga University of Science and Technology, P.O Box 210-40601, Bondo, Kenya
| | - Ramganesh Selvarajan
- Department of Environmental Science, University of South Africa, Florida Science Campus, Roodepoort, 1709, South Africa
- Laboratory of Extraterrestrial Ocean Systems (LEOS), Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, No. 28, Luhuitou Road, Sanya, 572000, Hainan Province, People's Republic of China
| | - Memory Tekere
- Department of Environmental Science, University of South Africa, Florida Science Campus, Roodepoort, 1709, South Africa
| | - Khayalethu Ntushelo
- Department of Agriculture and Animal Health, University of South Africa, Florida Science Campus, Roodepoort, 1709, South Africa
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In Silico Study of the RSH ( RelA/ SpoT Homologs) Gene Family and Expression Analysis in Response to PGPR Bacteria and Salinity in Brassica napus. Int J Mol Sci 2021; 22:ijms221910666. [PMID: 34639007 PMCID: PMC8509286 DOI: 10.3390/ijms221910666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/21/2021] [Accepted: 09/28/2021] [Indexed: 12/21/2022] Open
Abstract
Among several mechanisms involved in the plant stress response, synthesis of guanosine tetra and pentaphosphates (alarmones), homologous to the bacterial stringent response, is of crucial importance. Plant alarmones affect, among others, photosynthetic activity, metabolite accumulation, and nutrient remobilization, and thus regulate plant growth and development. The plant RSH (RelA/SpoT homolog) genes, that encode synthetases and/or hydrolases of alarmones, have been characterized in a limited number of plant species, e.g., Arabidopsis thaliana, Oryza sativa, and Ipomoea nil. Here, we used dry-to-wet laboratory research approaches to characterize RSH family genes in the polyploid plant Brassica napus. There are 12 RSH genes in the genome of rapeseed that belong to four types of RSH genes: 6 RSH1, 2 RSH2, 3 RSH3, and 1 CRSH. BnRSH genes contain 13-24 introns in RSH1, 2-6 introns in RSH2, 1-6 introns in RSH3, and 2-3 introns in the CRSH genes. In the promoter regions of the RSH genes, we showed the presence of regulatory elements of the response to light, plant hormones, plant development, and abiotic and biotic stresses. The wet-lab analysis showed that expression of BnRSH genes is generally not significantly affected by salt stress, but that the presence of PGPR bacteria, mostly of Serratia sp., increased the expression of BnRSH significantly. The obtained results show that BnRSH genes are differently affected by biotic and abiotic factors, which indicates their different functions in plants.
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Dąbrowska GB, Janczak K, Richert A. Combined use of Bacillus strains and Miscanthus for accelerating biodegradation of poly(lactic acid) and poly(ethylene terephthalate). PeerJ 2021; 9:e10957. [PMID: 33850642 PMCID: PMC8018249 DOI: 10.7717/peerj.10957] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/27/2021] [Indexed: 01/03/2023] Open
Abstract
Background The aim of this study was to verify whether the presence of Bacillus strains and of miscanthus influence biodegradation and formed of biofilm of poly(lactic acid) (PLA) and poly(ethylene terephthalate) (PET). Methods The experiment conducted in compost soil showed that strains Bacillus subtilis and Bacillus cereus isolated from heavy metal contaminated environment have biochemical activity and accelerate biodegradation of both plastic materials. Results For PLA film it was found that the carbonyl index dropped by over 15% in the presence of B. subtilis, while the film tensile strength decreased by 35% and the oxygen to carbon O/C ratio was higher by 3% in the presence of B. cereus, and the presence of miscanthus resulted in a loss of weight. For PET film, a decrease in the carbonyl index by 16% was observed following inoculation with B. cereus. The metabolic activity of this strain contributed to the reduction of the film’s tensile strength by 17% and to the increase in the permeability to O2 and CO2. The most intense degradation of PET film was observed in the presence of bacteria and plants. B. subtilis strain combined with miscanthus plantings may be a promising method for accelerating PLA and PET degradation in compost soil.
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Affiliation(s)
- Grażyna B Dąbrowska
- Department of Genetics, Faculty of Biological and Veterinary Science, Nicolaus Copernicus University, Toruń, Kuyavian-Pomeranian, Poland
| | - Katarzyna Janczak
- Research Network Łukasiewicz, Institute for Engineering of Polymer Materials and Dyes, Research Network Łukasiewicz, Toruń, Kuyavian-Pomeranian, Poland
| | - Agnieszka Richert
- Department of Genetics, Faculty of Biological and Veterinary Science, Nicolaus Copernicus University, Toruń, Kuyavian-Pomeranian, Poland
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Elmeihy R, Shi XC, Tremblay PL, Zhang T. Fast removal of toxic hexavalent chromium from an aqueous solution by high-density Geobacter sulfurreducens. CHEMOSPHERE 2021; 263:128281. [PMID: 33297225 DOI: 10.1016/j.chemosphere.2020.128281] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/12/2020] [Accepted: 09/06/2020] [Indexed: 06/12/2023]
Abstract
Hexavalent chromium (Cr(VI)) is a carcinogenic compound that can be removed from contaminated sites by the activity of metal-reducing bacteria. The model bacterium Geobacter sulfurreducens reduces Cr(VI) to less toxic Cr(III) and accumulates Cr ions intracellularly. However, this process is usually slow with small concentrations of Cr(VI) removed in a matter of days. Here, high-density G. sulfurreducens cultures were tested for the capacity to remove Cr(VI) readily. With an initial G. sulfurreducens density of 5.8 × 108 cells ml-1, 99.0 ± 0.8% of 100 mg l-1 Cr(VI) was removed after 20 min. With a higher starting Cr(VI) concentration of 200 mg l-1, G. sulfurreducens with a density of 11.4 × 108 cells ml-1 removed 99.0 ± 0.4% Cr(VI) after 2 h. Experiments performed with cell-free spent medium indicate that extracellular proteins are major contributors for the reduction of Cr(VI) to Cr(III). Furthermore, results show that most Cr(III) ions ultimately end up inside the bacterial cells where they are less susceptible to re-oxidation. The fast Cr(VI) removal rates observed with high-density G. sulfurreducens demonstrate the potential of this bacterium for bioremediation applications such as the cleaning of industrial wastewaters.
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Affiliation(s)
- Rasha Elmeihy
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, PR China; Agricultural Microbiology Department, Faculty of Agriculture, Benha University, Moshtohor, Kaluybia, 13736, Egypt
| | - Xiao-Chen Shi
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, PR China; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China; School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Pier-Luc Tremblay
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, PR China; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China.
| | - Tian Zhang
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, PR China; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China; School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, PR China.
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11
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Phour M, Sehrawat A, Sindhu SS, Glick BR. Interkingdom signaling in plant-rhizomicrobiome interactions for sustainable agriculture. Microbiol Res 2020; 241:126589. [DOI: 10.1016/j.micres.2020.126589] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/19/2020] [Accepted: 08/21/2020] [Indexed: 12/24/2022]
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12
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A Review on Practical Application and Potentials of Phytohormone-Producing Plant Growth-Promoting Rhizobacteria for Inducing Heavy Metal Tolerance in Crops. SUSTAINABILITY 2020. [DOI: 10.3390/su12219056] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Water scarcity and high input costs have compelled farmers to use untreated wastewater and industrial effluents to increase profitability of their farms. Normally, these effluents improve crop productivity by serving as carbon source for microbes, providing nutrients to plants and microbes, and improving soil physicochemical and biological properties. They, however, may also contain significant concentrations of potential heavy metals, the main inorganic pollutants affecting plant systems, in addition to soil deterioration. The continuous use of untreated industrial wastes and agrochemicals may lead to accumulation of phytotoxic concentration of heavy metals in soils. Phytotoxic concentration of heavy metals in soils has been reported in Pakistan along the road sides and around metropolitan areas, which may cause its higher accumulation in edible plant parts. A number of bacterial that can induce heavy metal tolerance in plants due to their ability to produce phytohormones strains have been reported. Inoculation of crop plants with these microbes can help to improve their growth and productivity under normal, as well as stressed, conditions. This review reports the recent developments in heavy metal pollution as one of the major inorganic sources, the response of plants to these contaminants, and heavy metal stress mitigation strategies. We have also summarized the exogenous application of phytohormones and, more importantly, the use of phytohormone-producing, heavy metal-tolerant rhizobacteria as one of the recent tools to deal with heavy metal contamination and improvement in productivity of agricultural systems.
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13
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Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0879-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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14
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Kowalkowski T, Krakowska A, Złoch M, Hrynkiewicz K, Buszewski B. Cadmium-affected synthesis of exopolysaccharides by rhizosphere bacteria. J Appl Microbiol 2019; 127:713-723. [PMID: 31211899 DOI: 10.1111/jam.14354] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 05/20/2019] [Accepted: 06/12/2019] [Indexed: 01/09/2023]
Abstract
AIM Study is focused on the influence of cadmium addition to growth media on production yield, their size and molecular mass of exopolysaccharides (EPS) synthesized by three rhizosphere bacteria strains. Inhibition of bacterial growth by increasing concentrations of Cd2+ was also analysed. METHODS AND RESULTS The highest impact of Cd2+ was noticed on the growth of Arthrobacter sp. and Rhizobium metallidurans. Chryseobacterium sp. and Arthrobacter sp. produced significantly lower when compared to R. metallidurans amounts of EPS under the influence of Cd2+ . In all bacterial strains both size and molecular mass decreased after addition of Cd2+ to growth media. It causes a change in EPS conformation to more planar, which minimizes the volume of liquid in the interglobular space next to the bacterial wall. Results confirmed strong effect of Cd2+ on the structure and synthesis of bacterial EPS what can be a key factor in the interactions between rhizosphere bacteria and host plants in heavy metal polluted soils. CONCLUSION This work proves that due to the presence of cadmium ions, the size and conformation of EPS produced by selected bacterial strains is changed to minimize their impact on cell. We suggest that shifting in EPS conformation from bigger globular particles to the smaller planar ones could be one of the probable mechanisms of Cd resistance in metallotolerant bacteria, and finally explain increased efficiency of heavy metal phytoextraction by EPS-producing plant growth-promoting micro-organisms. SIGNIFICANCE AND IMPACT OF THE STUDY One of the most promising remediation technique for Cd-contaminated areas is the phytoremediation in which rhizosphere bacteria play an important role by protecting plants' roots from toxic condition thus enhancing efficiency of intake. EPS secretion by bacteria is one of the most common mechanisms to protect the cell from impact of unpleasant environmental conditions, for example, toxicity of heavy metals like Cd.
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Affiliation(s)
- T Kowalkowski
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - A Krakowska
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - M Złoch
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - K Hrynkiewicz
- Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
| | - B Buszewski
- Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Toruń, Poland
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15
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Shi L, Deng X, Yang Y, Jia Q, Wang C, Shen Z, Chen Y. A Cr(VI)-tolerant strain, Pisolithus sp1, with a high accumulation capacity of Cr in mycelium and highly efficient assisting Pinus thunbergii for phytoremediation. CHEMOSPHERE 2019; 224:862-872. [PMID: 30852466 DOI: 10.1016/j.chemosphere.2019.03.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/11/2019] [Accepted: 03/03/2019] [Indexed: 05/18/2023]
Abstract
Ectomycorrhizal (ECM) fungi can improve the growth of pine trees and enhance their tolerance to heavy metal stress, and may also be useful during the afforestation and phytoremediation of polluted regions with pine trees. Hebeloma vinosophyllum (Cr(VI)-sensitive strain) and Pisolithus sp1 ((Cr(VI)-tolerant strain) were selected through liquid culture experiment, and were used in symbiosis with Japanese black pine (Pinus thunbergii) in pot experiments, to determine their potential for improving phytoremediation of Cr(VI)-contaminated soils. Our results indicated that Pisolithus sp1 also had a significantly higher accumulation of Cr than H. vinosophyllum in mycelium under the same Cr(VI) treatments in liquid culture experiment. The tolerance index of Pisolithus sp1 ECM seedlings' shoots and roots to Cr(VI) were significantly higher than that of H. vinosophyllum ECM and non-ectomycorrhizal (NM) seedlings while the total accumulated Cr per seedling in Pisolithus sp1 ECM seedlings were 1.50-1.96 and 2.83-27.75 fold higher that of H. vinosophyllum ECM and NM seedlings, respectively, within 0-800 mg kg-1 Cr(VI) treatments in pot experiments. In addition, the significant differences ratios of photosynthetic rate, stomatal conductance, transpiration rate and intercellular CO2 concentration between Pisolithus sp1 ECM and NM seedlings were significantly higher than those between H. vinosophyllum ECM and NM seedlings under 400 and 800 mg kg-1 Cr(VI) treatments. Compared with the control (no plant), and planting NM or H. vinosophyllum ECM seedlings, the planting of Pisolithus sp1 ECM seedlings significantly reduced the percentage content of exchangeable Cr in the soil.
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Affiliation(s)
- Liang Shi
- College of Life Sciences, Nanjing Agiricultural University, Nanjing, 210095, China
| | - Xiaopeng Deng
- Yunnan Academy of Tobacco Agriculture Science, Yunnan, 650021, China
| | - Yang Yang
- College of Life Sciences, Nanjing Agiricultural University, Nanjing, 210095, China
| | - Qiyuan Jia
- College of Life Sciences, Nanjing Agiricultural University, Nanjing, 210095, China
| | - Chunchun Wang
- College of Life Sciences, Nanjing Agiricultural University, Nanjing, 210095, China
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agiricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing Agiricultural University, Nanjing, 210095, China; National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yahua Chen
- College of Life Sciences, Nanjing Agiricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing Agiricultural University, Nanjing, 210095, China; National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing Agricultural University, Nanjing, 210095, China.
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16
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Kaur UJ, Preet S, Rishi P. Augmented antibiotic resistance associated with cadmium induced alterations in Salmonella enterica serovar Typhi. Sci Rep 2018; 8:12818. [PMID: 30143701 PMCID: PMC6109086 DOI: 10.1038/s41598-018-31143-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 08/13/2018] [Indexed: 01/09/2023] Open
Abstract
In view of the reports on co-selection of metal and antibiotic resistance, recently we have reported that increased cadmium accumulation in Salmonella Typhi Ty2 leads to increased antibiotic resistance. In continuation, the present study was carried to substantiate this association in clinical isolates. Interestingly, the levels of cadmium were found to be more in the clinical isolates which co-related with their antibiotic sensitivity/resistance pattern. On cadmium accumulation, antibiotic(s) sensitive isolates were rendered resistant and the resistant isolates were rendered more resistant as per their minimum inhibitory concentration(s). Further, after subjecting the pathogen to cadmium accumulation, alterations occurring in the cells were assessed. Transgenerational cadmium exposure led to changes in growth response, morphology, proteome, elevated antioxidants other than SOD, increased biofilm formation, decreased intracellular macrophage killing coupled with upregulation of genes encoding metallothionein and metal transporters. Thus, these results indicate that cadmium, if acquired from the environment, being non-degradable can exert a long-lasting selective pressure on Salmonella in the host which may display antibiotic resistance later on, as a result of co-selection. Therefore, appropriate strategies need to be developed to inhibit such an enduring pressure of heavy metals, as these represent one of the factors for the emerging antibiotic resistance in pathogens.
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Affiliation(s)
- Ujjwal Jit Kaur
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Simran Preet
- Department of Biophysics, Panjab University, Chandigarh, India
| | - Praveen Rishi
- Department of Microbiology, Panjab University, Chandigarh, India.
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17
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Thiem D, Złoch M, Gadzała-Kopciuch R, Szymańska S, Baum C, Hrynkiewicz K. Cadmium-induced changes in the production of siderophores by a plant growth promoting strain of Pseudomonas fulva. J Basic Microbiol 2018; 58:623-632. [PMID: 29775200 DOI: 10.1002/jobm.201800034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/23/2018] [Accepted: 04/28/2018] [Indexed: 11/07/2022]
Abstract
The impact of increasing Cd2+ exposure on the quality and quantity of siderophores produced by a plant growth promoting Pseudomonas fulva strain was tested to gain insight into the degree of change. P. fulva was cultured in the increasing concentrations of Cd2+ (0, 0.5, 1.0, 2.0 mM). The secreted siderophores were separated by HPLC and characterized by UHPLC-QTOF/MS. In the presence of 2 mM Cd2+ synthesis of siderophores (hydroxamates, catecholates, phenolates) was mitigated compared to the treatments with lower concentrations of Cd2+ (0.5 and 1 mM). Increased synthesis of catecholates in 0.5 and 1 mM Cd2+ and of phenolates in 0.5-2 mM Cd2+ was revealed compared to the variant without Cd2+ . Out of seven different hydroxamates, the secretion of ferrioxamine E was significantly decreased in the highest Cd2+ concentration. Two additional ferrioxamines, X2 and D2, were secreted independent of the presence or absence of Cd2+ . Exposure to Cd2+ change the composition of siderophores secreted by P. fulva with selective promotion of catecholates and phenolates at the expense of hydroxamates. Successful adaptation in a Cd-contaminated soil in the frame of practical applications to promote phytoremediation can be assumed.
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Affiliation(s)
- Dominika Thiem
- Faculty of Biology and Environment Protection, Department of Microbiology, Nicolaus Copernicus University, Torun, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Torun, Poland
| | - Michał Złoch
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Torun, Poland.,Faculty of Chemistry, Department of Environmental Chemistry and Bioanalytics, Nicolaus Copernicus University, Torun, Poland
| | - Renata Gadzała-Kopciuch
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Torun, Poland.,Faculty of Chemistry, Department of Environmental Chemistry and Bioanalytics, Nicolaus Copernicus University, Torun, Poland
| | - Sonia Szymańska
- Faculty of Biology and Environment Protection, Department of Microbiology, Nicolaus Copernicus University, Torun, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Torun, Poland
| | - Christel Baum
- Faculty of Agricultural and Environmental Sciences, Soil Science, University of Rostock, Rostock, Germany
| | - Katarzyna Hrynkiewicz
- Faculty of Biology and Environment Protection, Department of Microbiology, Nicolaus Copernicus University, Torun, Poland.,Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Torun, Poland
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18
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Abdelkrim S, Jebara SH, Saadani O, Chiboub M, Abid G, Jebara M. Effect of Pb-resistant plant growth-promoting rhizobacteria inoculation on growth and lead uptake by Lathyrus sativus. J Basic Microbiol 2018; 58:579-589. [DOI: 10.1002/jobm.201700626] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 03/02/2018] [Accepted: 04/20/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Souhir Abdelkrim
- Center of Biotechnology of Borj Cedria; Laboratory of Legumes; Hammam Lif Tunisia
- National Agronomic Institute of Tunisia; University of Carthage; Tunis Tunisia
| | - Salwa H. Jebara
- Center of Biotechnology of Borj Cedria; Laboratory of Legumes; Hammam Lif Tunisia
| | - Omar Saadani
- Center of Biotechnology of Borj Cedria; Laboratory of Legumes; Hammam Lif Tunisia
| | - Manel Chiboub
- Center of Biotechnology of Borj Cedria; Laboratory of Legumes; Hammam Lif Tunisia
| | - Ghassen Abid
- Center of Biotechnology of Borj Cedria; Laboratory of Legumes; Hammam Lif Tunisia
| | - Moez Jebara
- Center of Biotechnology of Borj Cedria; Laboratory of Legumes; Hammam Lif Tunisia
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19
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Cardoso P, Corticeiro S, Freitas R, Figueira E. Different efficiencies of the same mechanisms result in distinct Cd tolerance within Rhizobium. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 150:260-269. [PMID: 29289861 DOI: 10.1016/j.ecoenv.2017.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/24/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
Soil contamination with metals is a widespread problem posing risks to humans and ecosystems. Metal contaminated soils often hold poor microbial density and biodiversity. Among soil bacteria, rhizobia have a great agronomic and environmental significance and are major contributors to a sustainable maintenance of soil fertility. This group of microorganisms are severely affected by metals, such as cadmium (Cd), but information about metal resistance mechanisms in rhizobia is still limited. A concerted approach of the different mechanisms conferring Cd tolerance to rhizobia was conducted using two Rhizobium strains with contrasting tolerances to Cd. Results show that both strains resort to the same mechanisms (extracellular immobilization, periplasmic allocation, cytoplasmic sequestration and biotransformation of toxic products) to overcome stress, but differences in the efficiencies of some mechanisms were noticed. The ability of Rhizobium to increase glutathione in the presence of Cd emerges as a central factor in the tolerance to Cd and is as a feature to be looked for when screening or transforming microorganisms to integrate plant-microbe consortia. These could promote plant growth at contaminated sites, being more efficient for the cleanup of metals from contaminated sites and the restoration of soil quality.
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Affiliation(s)
- Paulo Cardoso
- Department of Biology and CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Sofia Corticeiro
- Department of Biology, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Rosa Freitas
- Department of Biology and CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Etelvina Figueira
- Department of Biology and CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
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20
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Pipíška M, Trajteľová Z, Horník M, Frišták V. Evaluation of Mn bioaccumulation and biosorption by bacteria isolated from spent nuclear fuel pools using 54Mn as a radioindicator. RADIOCHIM ACTA 2018. [DOI: 10.1515/ract-2017-2836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractBioaccumulation and biosorption characteristics of Mn2+ions by both dead and living, non-growing biomass of Gram-positive bacteriaKocuria palustrisandMicrococcus luteusisolated from spent nuclear fuel pools were compared. The radioindicator method using radionuclide54Mn was applied to obtain precise and reliable data characterizing both processes as well as manganese distribution in bacterial cells. Manganese was mainly found on the surface (biosorption) of live cells of both bacteria and surface sorption capacity increased with Mn concentration in solution. Only 10.0% (M. luteus) and 6.3% (K. palustris) of uptaken Mn were localized in the cytoplasm (bioaccumulation). Biosorption of Mn by dead bacterial biomass was a rapid process strongly affected by solution pH. Maximum sorption capacitiesQmaxcalculated from the Langmuir isotherm and characterizing Mn binding represented 316±15 μmol/g forM. luteusand 282±16 μmol/g forK. palustris.Results indicate that living, non-growing cells showed a higher efficiency of Mn removal than dead biomass. Based on FTIR spectra examination with aim to characterize the surface ofK. palustrisandM. luteuscells, we confirmed that the phosphate and carboxyl functional groups are involved in manganese sorption onto cell surface by both live and dead bacterial biomass.
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21
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Compartmentalization of Co and Mn in live cells of Escherichia coli: investigation using 60Co and 54Mn as radioindicators. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5480-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Dąbrowska G, Hrynkiewicz K, Trejgell A, Baum C. The effect of plant growth-promoting rhizobacteria on the phytoextraction of Cd and Zn by Brassica napus L. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2017; 19:597-604. [PMID: 27739900 DOI: 10.1080/15226514.2016.1244157] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The test strains Bacteroidetes bacterium (Ba), Pseudomonas fluorescens (Pf) and Variovorax sp. (Va) were selected in advance for their in vitro capability for growth promotion of rapeseed in the presence of increased concentrations of Cd, Cu, Pb and Zn in the medium. In the pot experiment, the strains were used for single Ba, Pf, Va or combined Ba + Pf, Ba + Va, Pf + Va, and Ba + Pf + Va inoculation of B. napus growing in contaminated soil from alluvial deposits. The positive effect of bacterial strains on plant growth was observed in vitro, but was not confirmed in situ in the contaminated soil, where the tested strains inhibited biomass production, rather than stimulating it. However, single inoculation with Ba significantly increased the chlorophyll content and K+ concentration in the leaves. The inoculation of rapeseed with Ba and Va strains was indicated to be the most promising combination for phytoextraction of Cd and Zn from contaminated soil. Combined inoculation with Pf+Va and Pf + Ba+Va significantly decreased the concentration of heavy metals in the roots of rapeseed. We conclude that suitable combinations of PGPR can control the metal uptake of B. napus, selectively increasing either metal extraction or metal stabilization in the rhizosphere and offering promising applications in soil remediation.
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Affiliation(s)
- G Dąbrowska
- a Department of Genetics, Faculty of Biology and Environment Protection , Nicolaus Copernicus University , Toruń , Poland
| | - K Hrynkiewicz
- b Department of Microbiology, Faculty of Biology and Environment Protection , Nicolaus Copernicus University , Toruń , Poland
| | - A Trejgell
- c Department of Plant Physiology and Biotechnology, Faculty of Biology and Environment Protection , Nicolaus Copernicus University , Toruń , Poland
| | - C Baum
- d Department of Soil Science , University of Rostock , Rostock , Germany
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23
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Milanowski M, Pomastowski P, Railean-Plugaru V, Rafińska K, Ligor T, Buszewski B. Biosorption of silver cations onto Lactococcus lactis and Lactobacillus casei isolated from dairy products. PLoS One 2017; 12:e0174521. [PMID: 28362838 PMCID: PMC5375156 DOI: 10.1371/journal.pone.0174521] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 03/10/2017] [Indexed: 01/20/2023] Open
Abstract
The current work deals with the phenomenon of silver cations uptake by two kinds of bacteria isolated from dairy products. The mechanism of sorption of silver cations by Lactococcus lactis and Lactobacillus casei bacteria was investigated. Inductively coupled plasma–mass spectrometry (ICP-MS) was used for determination of silver concentration sorbed by bacteria. Analysis of charge distribution was conducted by diffraction light scattering method. Changes in the ultrastructure of Lactococcus lactis and Lactobacillus casei cells after treatment with silver cations were investigated using transmission electron microscopy observation. Molecular spectroscopy methods, namely Fourier transform-infrared spectroscopy (FT-IR) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) were employed for description of the sorption mechanism. Moreover, an analysis of volatile organic compounds (VOCs) extracted from bacterial cells was performed.
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Affiliation(s)
- Maciej Milanowski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Paweł Pomastowski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Viorica Railean-Plugaru
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Katarzyna Rafińska
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Tomasz Ligor
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
- Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
- * E-mail:
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24
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Mateos LM, Villadangos AF, Santana LK, Pereira FJ, de la Rubia AG, Gil JA, Aller AJ. Comparative mathematical modelling of a green approach for bioaccumulation of cobalt from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:24215-24229. [PMID: 27646450 DOI: 10.1007/s11356-016-7596-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 09/04/2016] [Indexed: 06/06/2023]
Abstract
Cobalt is an essential element, but its wide use in industry generates important environmental and biological problems. The present study explores theoretical and empirical models of a green process for cobalt {Co2+} bioaccumulation from aqueous solutions. Two Gram-positive Bacillus subtilis species, strains CECT 4522 and LMM (the latter a former laboratory isolate from wastewater samples, which was phylogenetically characterized for the present work), were selected among others as the best Co2+ accumulation systems. Mathematical models representing kinetic and steady-state conditions for discrete and large amounts of bacterial biomass were expanded. In this way, it was possible to theoretically calculate the amount of Co2+ retained on the outer cell wall layer and incorporated inside the cell at any time. Theoretical and empirical hyperbolic-type models were suitable to fit the experimental bioaccumulation data for discrete amounts of bacteria biomass. In addition, kinetic relationships between the amount of Co2+ accumulated and the time before (or after) reaching steady state were established for large amounts of bacterial biomass. Other kinetic approaches were also satisfactorily tested. The two Gram-positive bacteria assayed are promising agents for developing heavy metal removal systems from industrial waste.
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Affiliation(s)
- L M Mateos
- Department of Molecular Biology, Area of Microbiology, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain
| | - A F Villadangos
- Department of Molecular Biology, Area of Microbiology, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain
| | - L K Santana
- Department of Molecular Biology, Area of Microbiology, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain
- Laboratório de Armazenamento de Energia e Tratamento de Efluentes, Instituto de Química, Universidade Federal de Uberlândia-MG, Av. João Naves de Ávila, 2121, CEP 38408-100, Uberlândia, Brazil
| | - F J Pereira
- Department of Applied Chemistry and Physics, Area of Analytical Chemistry, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain
| | - A G de la Rubia
- Department of Molecular Biology, Area of Microbiology, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain
| | - J A Gil
- Department of Molecular Biology, Area of Microbiology, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain
| | - A J Aller
- Department of Applied Chemistry and Physics, Area of Analytical Chemistry, Faculty of Biological and Environmental Sciences, University of León, 24071, León, Spain.
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25
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Złoch M, Thiem D, Gadzała-Kopciuch R, Hrynkiewicz K. Synthesis of siderophores by plant-associated metallotolerant bacteria under exposure to Cd(2.). CHEMOSPHERE 2016; 156:312-325. [PMID: 27183333 DOI: 10.1016/j.chemosphere.2016.04.130] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/23/2016] [Accepted: 04/30/2016] [Indexed: 05/21/2023]
Abstract
Rhizosphere and endophytic bacteria are well known producers of siderophores, organic compounds that chelate ferric iron (Fe(3+)), and therefore play an important role in plant growth promotion in metalliferous areas, thereby improving bioremediation processes. However, in addition to their primary function in iron mobilization, siderophores also have the capacity to chelate other heavy metals, such as Al(3+), Zn(2+), Cu(2+), Pb(2+) and Cd(2+), that can affect homeostasis and the heavy metal tolerance of microorganisms. The main goal of our study was to select the most efficient siderophore-producing bacterial strains isolated from the roots (endophytes) and rhizosphere of Betula pendula L. and Alnus glutinosa L. growing at two heavy metal contaminated sites in southern Poland. Siderophore biosynthesis of these strains in the presence of increasing concentrations of Cd(2+) (0, 0.5, 1, 2 and 3 mM) under iron-deficiency conditions was analysed using spectrophotometric chemical tests for hydroxamates, catecholates and phenolates, as well as the separation of bacterial siderophores by HPLC and characterization of their structure by UHPLC-QTOF/MS. We proved that (i) siderophore-producing bacterial strains seems to be more abundant in the rhizosphere (47%) than in root endophytes (18%); (ii) the strains most effective at siderophore synthesis belonged to the genus Streptomyces and were able to secrete three types of siderophores under Cd(2+) stress: hydroxamates, catecholates and phenolates; (iii) in general, the addition of Cd(2+) enhanced siderophore synthesis, particularly ferrioxamine B synthesis, which may indicate that siderophores play a significant role in tolerance to Cd(2+) in Streptomyces sp.
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Affiliation(s)
- Michał Złoch
- Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, 87-100 Torun, Poland; Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland
| | - Dominika Thiem
- Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, 87-100 Torun, Poland
| | - Renata Gadzała-Kopciuch
- Department of Environmental Chemistry & Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, PL-87-100 Torun, Poland; Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland
| | - Katarzyna Hrynkiewicz
- Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, 87-100 Torun, Poland; Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland.
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Icgen B, Yilmaz F. Use of cadA-Specific Primers and DNA Probes as Tools to Select Cadmium Biosorbents with Potential in Remediation Strategies. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2016; 96:685-693. [PMID: 26969609 DOI: 10.1007/s00128-016-1767-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 03/02/2016] [Indexed: 06/05/2023]
Abstract
Biosorption, using cadmium-resistant bacterial isolates, is often regarded as a relatively inexpensive and efficient way of cleaning up wastes, sediments, or soils polluted with cadmium. Therefore, many efforts have been devoted to the isolation of cadmium-resistant isolates for the efficient management of cadmium remediation processes. However, isolation, identification and in situ screening of efficient cadmium-resistant isolates are primary challenges. To overcome these challanges, in this study, cadA, cadmium resistance coding gene, specific primers and DNA probes were used to identify and screen cadmium-resistant bacteria in the cadmium-polluted river waters through polymerase chain reaction (PCR) and fluorescein in situ hybridization (FISH). PCR amplification of the cadA amplicon coupled with 16S rRNA sequencing revealed various gram-positive and -negative bacterial isolates harboring cadA. Accordingly, a cadA-mediated DNA probe was prepared and used for in situ screening of cadmium-resistant isolates from water samples collected from cadmium-polluted river waters. The FISH analyses of cadA probe showed highly specific and efficient hybridization with cadA harboring isolates. The use of primers and DNA probes specific for cadA gene seems to be very helpful tools for the selection and screening of cadmium biosorbents with potential to be used in the remediation of cadmium-polluted sites.
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Affiliation(s)
- Bulent Icgen
- Department of Environmental Engineering, Middle East Technical University, 06800, Ankara, Turkey.
| | - Fadime Yilmaz
- Department of Environmental Engineering, Middle East Technical University, 06800, Ankara, Turkey
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Gillan DC. Metal resistance systems in cultivated bacteria: are they found in complex communities? Curr Opin Biotechnol 2016; 38:123-30. [DOI: 10.1016/j.copbio.2016.01.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 01/27/2016] [Accepted: 01/28/2016] [Indexed: 12/11/2022]
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