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Joshi S, Gangola S, Bhandari G, Bhandari NS, Nainwal D, Rani A, Malik S, Slama P. Rhizospheric bacteria: the key to sustainable heavy metal detoxification strategies. Front Microbiol 2023; 14:1229828. [PMID: 37555069 PMCID: PMC10405491 DOI: 10.3389/fmicb.2023.1229828] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 07/10/2023] [Indexed: 08/10/2023] Open
Abstract
The increasing rate of industrialization, anthropogenic, and geological activities have expedited the release of heavy metals (HMs) at higher concentration in environment. HM contamination resulting due to its persistent nature, injudicious use poses a potential threat by causing metal toxicities in humans and animals as well as severe damage to aquatic organisms. Bioremediation is an emerging and reliable solution for mitigation of these contaminants using rhizospheric microorganisms in an environmentally safe manner. The strategies are based on exploiting microbial metabolism and various approaches developed by plant growth promoting bacteria (PGPB) to minimize the toxicity concentration of HM at optimum levels for the environmental clean-up. Rhizospheric bacteria are employed for significant growth of plants in soil contaminated with HM. Exploitation of bacteria possessing plant-beneficial traits as well as metal detoxifying property is an economical and promising approach for bioremediation of HM. Microbial cells exhibit different mechanisms of HM resistance such as active transport, extra cellular barrier, extracellular and intracellular sequestration, and reduction of HM. Tolerance of HM in microorganisms may be chromosomal or plasmid originated. Proteins such as MerT and MerA of mer operon and czcCBA, ArsR, ArsA, ArsD, ArsB, and ArsC genes are responsible for metal detoxification in bacterial cell. This review gives insights about the potential of rhizospheric bacteria in HM removal from various polluted areas. In addition, it also gives deep insights about different mechanism of action expressed by microorganisms for HM detoxification. The dual-purpose use of biological agent as plant growth enhancement and remediation of HM contaminated site is the most significant future prospect of this article.
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Affiliation(s)
- Samiksha Joshi
- School of Agriculture, Graphic Era Hill University, Bhimtal, India
| | - Saurabh Gangola
- School of Agriculture, Graphic Era Hill University, Bhimtal, India
| | - Geeta Bhandari
- Department of Biosciences, Himalayan School of Bio Sciences, Swami Rama Himalayan University, Dehradun, India
| | | | - Deepa Nainwal
- School of Agriculture, Graphic Era Hill University, Bhimtal, India
| | - Anju Rani
- Department of Life Sciences, Graphic Era (Deemed to be) University, Dehradun, Uttarakhand, India
| | - Sumira Malik
- Amity Institute of Biotechnology, Amity University Jharkhand, Ranchi, India
- Guru Nanak College of Pharmaceutical Sciences, Dehradun, Uttarakhand, India
- Department of Applied Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Petr Slama
- Laboratory of Animal Immunology and Biotechnology, Department of Animal Morphology, Physiology and Genetics, Faculty of AgriSciences, Mendel University in Brno, Brno, Czechia
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Yu X, Zhao J, Ding Z, Xiong F, Liu X, Tian J, Wu N. Cadmium-absorptive Bacillus vietnamensis 151-6 reduces the grain cadmium accumulation in rice (Oryza sativa L.): Potential for cadmium bioremediation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 254:114760. [PMID: 36907093 DOI: 10.1016/j.ecoenv.2023.114760] [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: 10/25/2022] [Revised: 03/07/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
Microbial bioremediation of heavy metal-polluted soil is a promising technique for reducing heavy metal accumulation in crops. In a previous study, we isolated Bacillus vietnamensis strain 151-6 with a high cadmium (Cd) accumulation ability and low Cd resistance. However, the key gene responsible for the Cd absorption and bioremediation potential of this strain remains unclear. In this study, genes related to Cd absorption in B. vietnamensis 151-6 were overexpressed. A thiol-disulfide oxidoreductase gene (orf4108) and a cytochrome C biogenesis protein gene (orf4109) were found to play major roles in Cd absorption. In addition, the plant growth-promoting (PGP) traits of the strain were detected, which enabled phosphorus and potassium solubilization and indole-3-acetic acid (IAA) production. Bacillus vietnamensis 151-6 was used for the bioremediation of Cd-polluted paddy soil, and its effects on growth and Cd accumulation in rice were explored. The strain increased the panicle number (114.82%) and decreased the Cd content in rice rachises (23.87%) and grains (52.05%) under Cd stress, compared with non-inoculated rice in pot experiments. For field trials, compared with the non-inoculated control, the Cd content of grains inoculated with B. vietnamensis 151-6 was effectively decreased in two cultivars (low Cd-accumulating cultivar: 24.77%; high Cd-accumulating cultivar: 48.85%) of late rice. Bacillus vietnamensis 151-6 encoded key genes that confer the ability to bind Cd and reduce Cd stress in rice. Thus, B. vietnamensis 151-6 exhibits great application potential for Cd bioremediation.
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Affiliation(s)
- Xiaoxia Yu
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, Jiangxi 330000, China
| | - JinTong Zhao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Zundan Ding
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Feng Xiong
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, Jiangxi 330000, China
| | - Xiaoqing Liu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jian Tian
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Ningfeng Wu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Lu H, Liu S, Zhang S, Chen Q. Light Irradiation Coupled with Exogenous Metal Ions to Enhance Exopolysaccharide Synthesis from Agaricus sinodeliciosus ZJU-TP-08 in Liquid Fermentation. J Fungi (Basel) 2021; 7:jof7110992. [PMID: 34829279 PMCID: PMC8618256 DOI: 10.3390/jof7110992] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/14/2021] [Accepted: 11/18/2021] [Indexed: 12/13/2022] Open
Abstract
To promote Agaricus sinodeliciosus var. Chaidam ZJU-TP-08 growth and metabolites accumulation, a novel integrated strategy was developed by adopting high levels of metal ions coupled with light treatment. The results revealed that yellow and blue light could significantly promote biomass and exopolysaccharides production, respectively. Furthermore, the yellow–blue light shift strategy could stimulate exopolysaccharides formation. Ca2+ ions coupled with blue light mostly promoted exopolysaccharides production related to oxidative stress, which was 42.00% and 58.26% higher than that of Ca2+ ions coupled with the non-light and dark cultivation without Ca2+ ions in 5-L bioreactor. RNA-seq was performed to uncover the underlined molecular mechanism regulated by light-induced gene expressions in exopolysaccharides biosynthesis and oxidative stress. The findings of this work provide valuable insights into adopting metal ions coupled with the light-assisted method for the macrofungus submerged fermentation for exopolysaccharides production.
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Pal A, Bhattacharjee S, Saha J, Sarkar M, Mandal P. Bacterial survival strategies and responses under heavy metal stress: a comprehensive overview. Crit Rev Microbiol 2021; 48:327-355. [PMID: 34473592 DOI: 10.1080/1040841x.2021.1970512] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Heavy metals bring long-term hazardous consequences and pose a serious threat to all life forms. Being non-biodegradable, they can remain in the food webs for a long period of time. Metal ions are essential for life and indispensable for almost all aspects of metabolism but can be toxic beyond threshold level to all living beings including microbes. Heavy metals are generally present in the environment, but many geogenic and anthropogenic activities has led to excess metal ion accumulation in the environment. To survive in harsh metal contaminated environments, bacteria have certain resistance mechanisms to metabolize and transform heavy metals into less hazardous forms. This also gives rise to different species of heavy metal resistant bacteria. Herein, we have tried to incorporate the different aspects of heavy metal toxicity in bacteria and provide an up-to-date and across-the-board review. The various aspects of heavy metal biology of bacteria encompassed in this review includes the biological notion of heavy metals, toxic effect of heavy metals on bacteria, the factors regulating bacterial heavy metal resistance, the diverse mechanisms governing bacterial heavy metal resistance, bacterial responses to heavy metal stress, and a brief overview of gene regulation under heavy metal stress.
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Affiliation(s)
- Ayon Pal
- Microbiology and Computational Biology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Sukanya Bhattacharjee
- Microbiology and Computational Biology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Jayanti Saha
- Microbiology and Computational Biology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Monalisha Sarkar
- Mycology and Plant Pathology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Parimal Mandal
- Mycology and Plant Pathology Laboratory, Department of Botany, Raiganj University, Raiganj, India
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Li W, Wang T. Cadmium binding characterization and mechanism of a newly isolated strain Cystobasidium oligophagum QN-3. Biotechnol Prog 2020; 36:e3029. [PMID: 32463147 DOI: 10.1002/btpr.3029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/18/2020] [Accepted: 05/22/2020] [Indexed: 11/08/2022]
Abstract
The aim of this study was to screen a strain for the removal of Cd2+ from aqueous solution and investigate the characterization and mechanism of the Cd2+ binding process. A novel strain of yeast showed high tolerance of cadmium, namely Cystobasidium oligophagum QN-3, was isolated from soils, which could resist 22,000 mg/L and 18,000 mg/L Cd2+ on PDA (potato dextrose agar) plate and in PDA liquid medium, respectively. Cd2+ binding experiment showed that the strain could remove Cd2+ from aqueous solution effectively, the maximum Cd2+ removal rate of 84.45% was achieved at initial Cd2+ concentration 30 mg/L. Scanning electron microscopy (SEM) analysis revealed that sorption of Cd2+ by cells could be associated with changes in the cell surface morphology. Fourier transform-infrared spectroscopy (FTIR) analysis confirmed the important role of the functional groups OH, CO, NH2 , COO, PO, and CH on the cell surface in the binding of Cd2+ . The comparison of the binding ability of different cellular parts indicated a significant role of the cell wall played in the Cd2+ binding process. Pretreatment of the cells by boiling or ultrasonication could improve the biosorption capacity of QN-3. In addition, QN-3 exhibited selective and preferential property of binding capacity for other heavy metals, such as Pb2+ , Cu2+ , Cd2+ , Zn2+ , and Ni2+ . These data suggested the promising use of Cystobasidium oligophagum QN-3 as an effective and friendly biosorbent for cadmium or other heavy metals decontamination in the environment.
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Affiliation(s)
- Wen Li
- Jiangsu Key Construction Laboratory of Food Resource Development and Quality Safe, Xuzhou University of Technology, Xuzhou, PR China
| | - Tao Wang
- Jiangsu Key Construction Laboratory of Food Resource Development and Quality Safe, Xuzhou University of Technology, Xuzhou, PR China
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Xie Y, Li X, Huang X, Han S, Amombo E, Wassie M, Chen L, Fu J. Characterization of the Cd-resistant fungus Aspergillus aculeatus and its potential for increasing the antioxidant activity and photosynthetic efficiency of rice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 171:373-381. [PMID: 30616154 DOI: 10.1016/j.ecoenv.2018.11.123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 11/20/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
Considerable evidence exists that microorganisms play a significant role in the remediation of soil contaminated with heavy metals. Aspergillus aculeatus (A. aculeatus) isolated from Cd-polluted soil has been shown to increase the tolerance of turfgrasses to Cd stress. In this study, we assessed the tolerance, biosorption capacity for Cd and surface characteristics of this fungus and investigated the effect of plant inoculation with A. aculeatus on the lipid peroxidation, antioxidant activities and photosynthetic rates in rice cultivated in Cd-contaminated soil. The results indicated that the removal efficiency of A. aculeatus was 46.8% at a Cd concentration of 10 mg L-1. The A. aculeatus strains had the capacity to produce indole acetic acid, siderophore, and 1-aminocyclopropane-1-carboxylate deaminase and to solubilize phosphate. The O2- accumulation and the amount of MDA in rice roots inoculated with A. aculeatus were significantly lower than those in uninoculated plants. Nevertheless, no decrease in leaf ROS accumulation and photosynthetic activity was observed between the inoculated and uninoculated plants. Inoculation with A. aculeatus contained more of the ROS-scavenging metabolite GSH, a higher GSH/GSSG ratio, and higher antioxidative enzyme (SOD, POD, and CAT) activities, possibly explaining the lower ROS concentrations observed in inoculated roots in the presence of Cd. These results suggest that application of A. aculeatus has the potential to protect crops against Cd stress.
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Affiliation(s)
- Yan Xie
- School of Resources and Environmental Engineering, Ludong University, Yantai 264025, PR China; Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China
| | - Xiaoning Li
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China; Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xuebing Huang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China; Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shijuan Han
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China; Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Erick Amombo
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China
| | - Misganaw Wassie
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China
| | - Liang Chen
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei 430074, PR China
| | - Jinmin Fu
- School of Resources and Environmental Engineering, Ludong University, Yantai 264025, PR China.
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7
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Yu X, Wei S, Yang Y, Ding Z, Wang Q, Zhao J, Liu X, Chu X, Tian J, Wu N, Fan Y. Identification of cadmium-binding proteins from rice (Oryza sativa L.). Int J Biol Macromol 2018; 119:597-603. [DOI: 10.1016/j.ijbiomac.2018.07.190] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/02/2018] [Accepted: 07/30/2018] [Indexed: 01/02/2023]
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8
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Lai CY, Dong QY, Chen JX, Zhu QS, Yang X, Chen WD, Zhao HP, Zhu L. Role of Extracellular Polymeric Substances in a Methane Based Membrane Biofilm Reactor Reducing Vanadate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10680-10688. [PMID: 30106284 DOI: 10.1021/acs.est.8b02374] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For the first time, we demonstrated vanadate (V(V)) reduction in a membrane biofilm reactor (MBfR) using CH4 as the sole electron donor. The V(V)-reducing capability of the biofilm kept increasing, with complete removal of V(V) achieved when the influent surface loading of V(V) was 363 mg m-2 day-1. Almost all V(V) was reduced to V(IV) precipitates, which is confirmed by a scanning electron microscope coupled to energy dispersive X-ray spectroscopy (SEM-EDS) and X-ray photoelectron spectroscopy (XPS). Microbial community analysis revealed that denitrifiers Methylomonas and Denitratisoma might be the main genera responsible for V(V) reduction. The constant enrichment of Methylophilus suggests that the intermediate (i.e., methanol) from CH4 metabolism might be used as the electron carriers for V(V) bioreduction. Intrusion of V(V) (2-5 mg/L, at the surface loading of 150-378 mg m-2 day-1) into the biofilm stimulated the secretion of extracellular polymeric substances (EPS), but high loading of V(V) (10 mg/L, at the surface loading of 668 mg m-2 day-1) decreased the amount of EPS. Metagenomic prediction analysis established the strong correlation between the secretion of EPS and the microbial metabolism associated with V(V) reduction, tricarboxylic acid cycle (TCA) cycle, methane oxidation, and ATP production, and EPS might relieve the oxidative stress induced by high loading of V(V). Colorimetric determination and a three-dimensional excitation-emission matrix (3D-EEM) showed that tryptophan and humic acid-like substances might play important roles in microbial cell protection and V(V) binding. Fourier transform infrared (FTIR) spectroscopy identified hydroxyl (-OH) and carboxyl (COO-) groups in EPS as the candidate functional groups for binding V(V).
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Affiliation(s)
- Chun-Yu Lai
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
- Advanced Water Management Centre , The University of Queensland , St. Lucia , Queensland 4072 , Australia
| | - Qiu-Yi Dong
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Jia-Xian Chen
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Quan-Song Zhu
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Xin Yang
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Wen-Da Chen
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - He-Ping Zhao
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety , Zhejiang University , Hangzhou , Zhejiang , China 310058
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Liang Zhu
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety , Zhejiang University , Hangzhou , Zhejiang , China 310058
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Xu P, Lai C, Zeng G, Huang D, Chen M, Song B, Peng X, Wan J, Hu L, Duan A, Tang W. Enhanced bioremediation of 4-nonylphenol and cadmium co-contaminated sediment by composting with Phanerochaete chrysosporium inocula. BIORESOURCE TECHNOLOGY 2018; 250:625-634. [PMID: 29220806 DOI: 10.1016/j.biortech.2017.11.069] [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: 10/12/2017] [Revised: 11/20/2017] [Accepted: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Composting is identified as an effective approach for solid waste disposal. The bioremediation of 4-nonylphenol (4NP) and cadmium (Cd) co-contaminated sediment was investigated by composting with Phanerochaete chrysosporium (P. chrysosporium) inocula. P. chrysosporium inocula and proper C/N ratios (25.51) accelerated the composting process accompanied with faster total organic carbon loss, 4NP degradation and Cd passivation. Microbiological analysis demonstrated that elevated activities of lignocellulolytic enzymes and sediment enzymes was conducive to organic chemical transformation. Bacterial community diversity results illustrated that Firmicutes and Proteobacteria were predominant species during the whole composting process. Aerobic cellulolytic bacteria and organic degrading species played significant roles. Toxicity characteristic leaching procedure (TCLP) extraction and germination indices results indicated the efficient detoxification of 4NP and Cd co-contaminated sediment after 120 days of composting. Overall, results demonstrated that P. chrysosporium enhanced composting was available for the bioremediation of 4NP and Cd co-contaminated sediment.
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Affiliation(s)
- Piao Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Cui Lai
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China.
| | - Danlian Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Ming Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Biao Song
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Xin Peng
- College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Jia Wan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Liang Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Abing Duan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Wangwang Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
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Sheng Y, Wang Y, Yang X, Zhang B, He X, Xu W, Huang K. Cadmium tolerant characteristic of a newly isolated Lactococcus lactis subsp. lactis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 48:183-190. [PMID: 27816003 DOI: 10.1016/j.etap.2016.10.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 06/06/2023]
Abstract
Environmental contamination caused by heavy metals poses a major threat to the wildlife and human health for their toxicity and intrinsically persistent nature. Some specific food grade bacteria have properties that enable them to eliminate heavy metals from food and water. Lactococcus lactis subsp. lactis, newly isolated from pickles, is a cadmium (Cd) tolerant bacteria. Cd resistant properties of the lactis was evaluated under different Cd stresses. Cd accumulation in different cellular parts was determined by ICP-MS and cell morphology changes were measured by SEM-EDS and TEM-EDS. In addition, functional groups associated with Cd resistance were detected by infrared spectroscopic analysis. The results indicated that Cd mainly accumulated in the cell surface structures including cytoderm and cytomembrane. Functional groups such as OH and NH2 in the cell surface played essential roles in Cd biosorption. The elements of O, P, S, and N of polysaccharide, membrane protein and phosphatidate in the cell surface structures might be responsible for Cd biosorption for their strong electronegativity. This study indicated that ultrastructural analysis can be a supplemental method to study heavy metal resistance mechanism of microorganism and the newly isolated lactococcus lactis subsp. lactis has great potential to be applied to decontamination of heavy metals.
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Affiliation(s)
- Yao Sheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Ying Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xuan Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Boyang Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiaoyun He
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Kunlun Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China.
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11
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Biosorption of aluminum through the use of non-viable biomass of Pseudomonas putida. J Biotechnol 2016; 236:57-63. [DOI: 10.1016/j.jbiotec.2016.07.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 11/22/2022]
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12
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Metal removal of cyanobacterial exopolysaccharides by uronic acid content and monosaccharide composition. Carbohydr Polym 2014; 101:265-71. [DOI: 10.1016/j.carbpol.2013.09.040] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 09/06/2013] [Accepted: 09/14/2013] [Indexed: 12/20/2022]
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13
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Ozturk S, Aslim B, Suludere Z. Evaluation of chromium(VI) removal behaviour by two isolates of Synechocystis sp. in terms of exopolysaccharide (EPS) production and monomer composition. BIORESOURCE TECHNOLOGY 2009; 100:5588-93. [PMID: 19560345 DOI: 10.1016/j.biortech.2009.06.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 05/29/2009] [Accepted: 06/01/2009] [Indexed: 05/24/2023]
Abstract
Chromium(VI) removal and its association with exopolysaccharide (EPS) production in cyanobacteria were investigated. Synechocystis sp. BASO670 produced higher EPS (548 mg L(-1)) than Synechocystis sp. BASO672 (356 mg L(-1)). While the EC(50) of the Cr(VI) for Synechocystis sp. BASO670 and Synechocystis sp. BASO672 were determined as 11.5 mg L(-1), and 2.0 mg L(-1), respectively, there was no relation between Cr(VI) removal and EPS production. Synechocystis sp. BASO672, which has higher EPS value, removed (33%) more Cr(VI) than Synechocystis sp. BASO670. Monomer compositions of EPS of each of the isolates were determined differently. Synechocystis sp. BASO672 which removed higher Cr(VI), had higher values of uronic acid and glucuronic acid (192 microg/mg and 89%, respectively). Our results showed that EPS might play a role in Cr(VI) tolerance. Monomer composition, especially uronic acid and glucuronic acid content of EPS may have enhanced Cr(VI) removal.
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Affiliation(s)
- Sahlan Ozturk
- Nevsehir University, Faculty of Science and Arts, Department of Biology, 50300 Nevsehir, Turkey.
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Cheung HY, Chan GKL, Cheung SH, Sun SQ, Fong WF. Morphological and chemical changes in the attached cells of Pseudomonas aeruginosa as primary biofilms develop on aluminium and CaF2 plates. J Appl Microbiol 2007; 102:701-10. [PMID: 17309619 DOI: 10.1111/j.1365-2672.2006.03137.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To investigate the morphological and chemical changes in attached cells of Pseudomonas aeruginosa (ATCC 14886) at different stages of biofilm development on two different types of substrata. METHODS AND RESULTS The development of primary biofilm on aluminium plates representing metals and on CaF(2) discs representing dielectric materials was monitored by FTIR microscopy, ESEM, EDAX and protein analysis by SDS-PAGE. A unique cellular feature similar in morphology to pili was observed on the surface of P. aeruginosa adhering on aluminium but not on CaF(2). Results derived from FTIR analysis confirm on both substrata the successive importance of polysaccharides and proteins during the biofilm development. These results also revealed that the increase of the ratio of carboxylates to amide I was higher with the aluminium plates than with the CaF(2) discs. The number of cells adhered and the amount of oxygen incorporated in adhered cells on the latter materials were, respectively, less and almost nil in comparison with the former. Protein analysis of the lysates of cells by SDS-PAGE revealed that expression of one protein with a molecular weight of 45 kDa, was greatly enhanced in attached cells on both substrata. However, expression of another protein with molecular weight of 35 kDa was up-regulated only in cells adhering on CaF(2) but not in those on aluminium. CONCLUSION Depending on the nature of the surface, new proteinaceous complexes and cellular features were formed in the attachment process of P. aeruginosa. SIGNIFICANCE AND IMPACT OF THE STUDY The pattern of P. aeruginosa cells adhering onto CaF(2) discs and aluminium plates is different. Formation of biofilm is more difficult on CaF(2) than on aluminium.
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Affiliation(s)
- H-Y Cheung
- Department of Biology & Chemistry, City University of Hong Kong, Hong Kong SAR, China.
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15
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Li J, Wu C, Gao F, Zhang R, Lv G, Fu D, Chen B, Wang X. In vitro study of drug accumulation in cancer cells via specific association with CdS nanoparticles. Bioorg Med Chem Lett 2006; 16:4808-12. [PMID: 16844372 DOI: 10.1016/j.bmcl.2006.06.069] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Revised: 05/12/2006] [Accepted: 06/22/2006] [Indexed: 11/16/2022]
Abstract
We report a novel approach to enhance the efficient accumulation and utilization of anticancer drug daunorubicin on cancer cells through the combination with CdS nanoparticles. Our observations using confocal fluorescence scanning microscopy as well as electrochemical analysis methods demonstrate that CdS nanoparticles can readily bind with daunorubicin on the external membrane of the targeted cells and facilitate the uptake of drug molecules in the human leukemia K562 cells. Besides, our results also indicate that the competitive binding of CdS nanoparticles with accompanying anticancer drug to the membrane of leukemia K562 cells could efficiently prevent the drug release by the drug-sensitive and drug-resistant leukemia cells and thus inhibit the possible multidrug resistance of cancer cells, which could be further utilized to improve the future drug efficiency in respective tumor chemotherapies.
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Affiliation(s)
- Jingyuan Li
- State Key Lab of Bioelectronics (Chien-Shiung WU Laboratory), Southeast University, Nanjing 210096, PR China
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16
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Vullo DL, Ceretti HM, Hughes EA, Ramírez S, Zalts A. Indigenous heavy metal multiresistant microbiota of Las Catonas stream. ENVIRONMENTAL MONITORING AND ASSESSMENT 2005; 105:81-97. [PMID: 15952513 DOI: 10.1007/s10661-005-3157-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Las Catonas stream (Buenos Aires Metropolitan Area) receives a complex mixture of pollutants from point and diffuse sources because of the agricultural, industrial and urban land uses of its basin. Widespread detection of heavy metals exceeding aquatic life protection levels has occurred in monitoring reconnaissance studies in surface and pore water. As a result of the screening of Cu, Cd, Zn and Pb resistant/tolerant and culturable microbiota, B101N and 200H strains (Pseudomonas fluorescens or putida) were isolated and selected for further studies. They showed 65% Cd and 35% Zn extraction efficiency from aqueous phase. The potential use of these strains in wastewater treatment is currently investigated in order to contribute to decrease heavy metal pollution, a problem affecting every stream of Buenos Aires Metropolitan Area.
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Affiliation(s)
- Diana L Vullo
- Area Química, Instituto de Ciencias, Universidad Nacional de General Sarmiento, J.M. Gutierrez 1150, Los Polvorines, Provincia de Buenos Aires, Argentina.
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17
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Lebeau T, Bagot D, Jézéquel K, Fabre B. Cadmium biosorption by free and immobilised microorganisms cultivated in a liquid soil extract medium: effects of Cd, pH and techniques of culture. THE SCIENCE OF THE TOTAL ENVIRONMENT 2002; 291:73-83. [PMID: 12150444 DOI: 10.1016/s0048-9697(01)01093-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Instead of soil clean-up, a process not very technically and economically suited to agricultural soil contaminated by heavy metals (with a low concentration of heavy metals but highly or potentially highly contaminated surfaces), the control of the transfer of cadmium from the soil to the crops may well be a convenient method. We tested the bacterium ZAN-044, the actinomycete R27 and a basidiomycete Fomitopsis pinicola isolated for their ability to biosorb Cd, in order to inoculate agricultural soils afterwards. We then compared the cadmium biosorption by viable microbial cells which were free or immobilised in alginate beads and incubated in a soil extract liquid medium at various pH values (5, 6 and 7) and cadmium concentrations (1 and 10 mg/l). The Cd concentration in the medium had the most important effect on the percentage of Cd biosorbed by the microorganisms, but the culture mode (free or immobilised cells) was not a side effect. In the case of F. pinicola and the actinomycete R27, the percentage of Cd biosorbed by free cells did not decrease when the Cd concentration in the medium increased (6-42% at the lowest Cd concentration to 11-48% at 10 mg Cd/l). On the other hand, with a low Cd concentration (1 mg Cd/l), the percentage of Cd biosorbed by the bacterium ZAN-044 was maximum (69%) at pH 7, while this bacterium did not grow at 10 mg Cd/l and it did not accumulate Cd. For the three micro-organisms tested, relatively low specific biosorptions of Cd were observed, when the microorganisms were cultivated with a soil extract medium ('poor' medium), comparatively to those with a 'rich' medium. Finally, the choice of microorganism for the inoculation of contaminated soils depends on the cadmium level in the medium and on the distribution of the metal between the biomass and the medium.
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Affiliation(s)
- T Lebeau
- Université de Haute-Alsace, laboratoire Gestion des Risques et Environnement, Colmar, France.
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18
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Abstract
Population level studies demonstrate that bacterial colonization of surfaces and subsequent biofilm architecture are controlled by a variety of factors that include the hydrodynamics, surface chemistry and genotype of the cell. New molecular tools now extend our ability to investigate among bacterial cells within a surface-associated population subtle phenotypic differences that do not involve changes in genotype. Such resolution has led to new discoveries in relationships between bacterial cells and their environment.
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Affiliation(s)
- G G Geesey
- Department of Microbiology and Center for Biofilm Engineering, PO Box 173520, Montana State University, Bozeman, Montana 59717-3520, USA.
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