Bioremediation of copper by active cells of Pseudomonas stutzeri LA3 isolated from an abandoned copper mine soil

Palanivel, Thenmozhi Murugaian; Sivakumar, Nallusamy; Al-Ansari, Aliya

doi:10.1016/j.jenvman.2019.109706

Cited by 60 publications

(38 citation statements)

References 46 publications

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“…To characterize the surface morphology and topology of the CTB, a Scanning Electron Microscope (SEM) was used and for the detection of Cu 2+ ions, EDX analysis was performed (Palanivel et al 2020;Tunali et al 2006). For SEM analysis, samples were prepared as per the standard protocol of Prior and Perkins 1974 with some modi cations.…”

Section: Microscopic Analysismentioning

confidence: 99%

Isolation and Characterization of Copper Tolerant Bacterial Species Habituating in Copper Mines and Study of Their Potentiality as a Plant Growth Stimulator

Majhi

Let

Halder

et al. 2021

Preprint

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Copper (Cu) is a vital micronutrient for all living organisms below its toxicity limit. Various industrial activities, mining deposits, excessive use of harmful chemicals, waste discharges, and drugs are the main reason for the emerging copper concentration. Emphases of the current study were to isolate and characterize highly copper-tolerating bacterial (CTB) species from a copper-contaminated site. In enrichment culture techniques, 24 copper tolerant microbial isolates were evaluated and the maximum tolerable concentration (MTC) was determined using various concentrations of copper sulfate pentahydrate (CuSO4.5H2O) solution. Three bacterial strains named GKSM2, GKSM6, and GKSM11 were tolerant to 350 mg/l of CuSO4.5H2O. The 16S rRNA gene sequencing and phylogeny data revealed that these CTB belong to species Bacillus zanthoxyli, Bacillus stercoris, and Pseudomonas alcaliphila species. CTB showed their optimized growth at moderate salt concentration (0.1-0.5M NaCl), temperature range (20-45˚C) and wide pH range (pH 5.0-11). All the strains can produce various Plant growth stimulating (PGS) traits viz., phytohormones (IAA, GA), proline, nitrogen fixation, ammonification, and antioxidant enzymes in presence and absence of Cu2+ stress. The result displays that adsorption of Cu2+ ions evidenced by TEM, SEM, and SEM-EDX analysis.

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Section: Microscopic Analysismentioning

confidence: 99%

Isolation and Characterization of Copper Tolerant Bacterial Species Habituating in Copper Mines and Study of Their Potentiality as a Plant Growth Stimulator

Majhi

Let

Halder

et al. 2021

Preprint

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“…In a study, optimum pH was reported as 7.0 for bacterial isolates in heavy metal bioremediation [40] and this was higher than the present findings. In the bioremediation process, pH influenced the solubility of the metal ions in the medium, and this process mainly depends on the functional groups of bacterial cell surfaces [41]. In microorganisms, functional groups such as hydroxyl, carboxyl, phosphate, and amino play a major role in the uptake of Cd and this behavior varies at various pH conditions [42].…”

Section: Resultsmentioning

confidence: 99%

Optimizing the Management of Cadmium Bioremediation Capacity of Metal-Resistant Pseudomonas sp. Strain Al-Dhabi-126 Isolated from the Industrial City of Saudi Arabian Environment

Al-Dhabi

Esmail

Ghilan

et al. 2019

IJERPH

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In this study, 23 bacterial strains were isolated from a Cadmium (Cd) contaminated soil in the industrial city, Riyadh of Saudi Arabia. Among these isolates six strains were found to withstand cadmium contamination and grow well. From the six isolates Pseudomonas sp. strain Al-Dhabi-122–127 were found to resist cadmium toxicity to a higher level. The isolates were subjected to biochemical and 16S rDNA gene sequence characterization to confirm their identification. The bacterial strain Al-Dhabi-124 showed 1.5 times higher Cd-degrading activity than Al-Dhabi-122 and Al-Dhabi-123, and Al-Dhabi-126 exhibited 3.5 times higher Cd-degrading activity, higher than the other strains. An atomic absorption spectrophotometer study showed that the strain Al-Dhabi-126 absorbed Cd, and that the bacterial strain Al-Dhabi-126 was found to tolerate cadmium level up to 2100 µg/mL. The bacterial strain Al-Dhabi-126 showed a maximum Cd removal efficacy at pH between 6.0 and 8.0. The efficacy decreased sharply after an increase in pH (9.0). An optimum temperature of 50 °C and pH 6.0 were found to be effective for the Cd removal process by the isolate. The study indicated that the bacterial strain Al-Dhabi-126 can be used effectively for the bioremediation of heavy metals like cadmium, a major toxic pollutant in industrial effluents.

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“…A substantial body of work has identified alterations of epigenetic mechanisms caused by EDC action [83]. This important mechanism seems to be responsible for transgenerational and multigenerational effects of EDC [84e86] as well as indirect consequences such as disruption of circadian rhythms [87] or metabolic systems [88,89]. Recent discoveries have shown that the transcriptional activation of genes critical for pubertal onset is mediated by epigenetic factors.…”

Section: Newly Described Mechanisms Of Action For Edcs and Their Poss...mentioning

confidence: 99%

Endocrine-disrupting chemicals and their effects on puberty

López-Rodríguez

Franssen

Heger

2021

Best Practice & Research Clinical Endocrinology & Metab

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Bioremediation of copper by active cells of Pseudomonas stutzeri LA3 isolated from an abandoned copper mine soil

Cited by 60 publications

References 46 publications

Isolation and Characterization of Copper Tolerant Bacterial Species Habituating in Copper Mines and Study of Their Potentiality as a Plant Growth Stimulator

Isolation and Characterization of Copper Tolerant Bacterial Species Habituating in Copper Mines and Study of Their Potentiality as a Plant Growth Stimulator

Optimizing the Management of Cadmium Bioremediation Capacity of Metal-Resistant Pseudomonas sp. Strain Al-Dhabi-126 Isolated from the Industrial City of Saudi Arabian Environment

Endocrine-disrupting chemicals and their effects on puberty

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