Characterization of a Cd2+-Resistant Strain of Ochrobactrum sp. Isolated from Slag Disposal Site of an Iron and Steel Factory

Pandey, Sanjeev; Saha, Pradipta; Barai, Prabir Kumar; Maiti, Tushar Kanti

doi:10.1007/s00284-010-9583-8

Cited by 20 publications

(7 citation statements)

References 19 publications

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“…This method had not been previously addressed by any of the previous scientists, as we have in our current study, resulting in a precise analysis of heavy element removal percentages using the mentioned strains. Poornima et al ( 2014 ) and Pandey et al ( 2011 ) achieved a similar concept in our study without our sequence work by isolating E. coli PS01 and Bacillus sp., both of which can withstand high concentrations of chromium, lead, and arsenic (Pandey et al, 2011 ; Poornima et al, 2014 ). In the study conducted by Rani et al ( 2010 ), three bacterial isolates, namely, Bacillus sp., Pseudomonas sp., and Micrococcus sp., were isolated, and their bioaccumulation capacities were reported as follows: 69.34% for copper, 90.41% for cadmium, and 84.27% for lead.…”

Section: Discussionsupporting

confidence: 78%

Bioremediation of industrial wastewater heavy metals using solo and consortium Enterobacter spp.

Kelany,

El-sawy,

El-Gendy

et al. 2023

Environ Monit Assess

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Heavy metals are considered the most common pollutants in industrial wastewater areas. Out of thirty bacterial isolates, only 3 isolates sighted the highest metal resistance activity for Zn+2, Fe+2, Pb+2, Co+2, Mn+2, Ni+2, and Cd+2. The biochemical and DNA homology identification with similarities 99.58%, 99.79%, and 99.86% of those isolates was identified and deposited in WDCM, respectively, as Enterobacter kobei OM144907 SCUF0000311, Enterobacter cloacae OM180597 SCUF0000312, and Enterobacter hormaechei OM181067 SCUF0000313. The minimum tolerance activity (MIC) of heavy metal concentrations against E. kobei and E. cloacae was 25, 15, and 15 mmol/l for Ni+2, Fe+2, and Mn+2, respectively, and 10 mmol/l for Zn+2, Pb+2, Co+2, and Cd+2, while against E. hormaechei, it is 15 mmol/l for Ni+2, Fe+2, and Mn+2 and 10 mmol/l for Zn+2, Pb+2, Co+2, and Cd+2. The consortium and solitary application of bacterial isolates towards heavy metal removal at 100%, 200%, and 300% industrial wastewater concentrations were conducted and showed that more than 90% removal of Zn+2, Fe+2, Pb+2, Mn+2, Ni+2, and Cd+2 from a non-concentrated polluted sample (100%) was reported by the three strains. With doubling the polluted sample concentration (200%), the highest removal efficiency for Zn+2, Pb+2, Mn+2, Ni+2, and Cd+2 was reported by E. cloacae as 70. 75, 66, 65, and 57%, respectively. Removal efficiency after increasing the polluted sample concentration to 300% showed that E. cloacae removed above 45% of all tested heavy metals except Pb+2. Ultimately, E. cloacae exposed the highest efficiency with recommendations for heavy metals removal under higher concentrations.

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Section: Discussionsupporting

confidence: 78%

Bioremediation of industrial wastewater heavy metals using solo and consortium Enterobacter spp.

Kelany,

El-sawy,

El-Gendy

et al. 2023

Environ Monit Assess

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“…The strain CM6 grew over a wide temperature range from 20 to 50°C tolerated salt concentrations as high as 7 % NaCl. Tolerance of high concentration of NaCl by the strains CM3 and CM6 may indicate an ability to accumulate heavy metals such as Cd and be significantly resistant to them based on an observed correlation of Cd accumulation and salt tolerance by Pandey et al (2010).…”

Section: Resultsmentioning

confidence: 97%

Multiple metal-resistant bacteria and fungi from acidic copper mine tailings of Xinjiang, China

et al. 2015

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The microbiology of mining environments has become a research topic of great importance. The present study reports on six bacterial and three fungal isolates which were characterized on a molecular basis. The phylogenetic analysis distributed the bacterial isolates into six groups in which groups A, B and C belonged to Bacillus beringensis, Bacillus sp. and Bacillus megaterium, respectively, while groups D, E and F constituted strains of Pseudomonas putida, Acidothiobacillus sp. and Kocuria sp., respectively. Fungi isolated belonged to the genera Aspergillus, Fusarium and Hypocrea. These isolates showed metal resistances to six heavy metals: Cu, Cr, Pb, Cd, Sb and Ni. For the bacteria, the minimum inhibitory concentrations (MICs) of these metals were in the range of 1-11 mM, whereas for fungi, the MIC was in the range of 5-20 mM. The multiple heavy metal-resistant bacterial species may be further screened for application to bioremediation.

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“…This genus presented two major traits that worth to be considered for a better understanding of human pathogen emergence : i) its high level of resistance to a large panel of antimicrobial agents and xenobiotics [27]–[29], ii) its membership of a genetically tight clade with Brucella spp., a strict and specific anthropozoonotic pathogen [20]. Knowledge about Ochrobactrum is therefore of great interest to describe and then to predict the evolution of environmental bacteria towards host pathogenic behaviors.…”

Section: Discussionmentioning

confidence: 99%

Niches, Population Structure and Genome Reduction in Ochrobactrum intermedium: Clues to Technology-Driven Emergence of Pathogens

et al. 2014

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Ochrobactrum intermedium is considered as an emerging human environmental opportunistic pathogen with mild virulence. The distribution of isolates and sequences described in literature and databases showed frequent association with human beings and polluted environments. As population structures are related to bacterial lifestyles, we investigated by multi-locus approach the genetic structure of a population of 65 isolates representative of the known natural distribution of O. intermedium. The population was further surveyed for genome dynamics using pulsed-field gel electrophoresis and genomics. The population displayed a clonal epidemic structure with events of recombination that occurred mainly in clonal complexes. Concerning biogeography, clones were shared by human and environments and were both cosmopolitan and local. The main cosmopolitan clone was genetically and genomically stable, and grouped isolates that all harbored an atypical insertion in the rrs. Ubiquitism and stability of this major clone suggested a clonal succes in a particular niche. Events of genomic reduction were detected in the population and the deleted genomic content was described for one isolate. O. intermedium displayed allopatric characters associated to a tendancy of genome reduction suggesting a specialization process. Considering its relatedness with Brucella, this specialization might be a commitment toward pathogenic life-style that could be driven by technological selective pressure related medical and industrial technologies.

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Characterization of a Cd2+-Resistant Strain of Ochrobactrum sp. Isolated from Slag Disposal Site of an Iron and Steel Factory

Cited by 20 publications

References 19 publications

Bioremediation of industrial wastewater heavy metals using solo and consortium Enterobacter spp.

Bioremediation of industrial wastewater heavy metals using solo and consortium Enterobacter spp.

Multiple metal-resistant bacteria and fungi from acidic copper mine tailings of Xinjiang, China

Niches, Population Structure and Genome Reduction in Ochrobactrum intermedium: Clues to Technology-Driven Emergence of Pathogens

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