Tolerance of Microorganisms in Soil Contaminated with Trace Metals: An Overview

Chanda, Dhritiman; Sharma, G.; Jha, Dhruva Kumar; Hijri, Mohamed

doi:10.1007/978-981-10-5275-0_8

Cited by 7 publications

(4 citation statements)

References 101 publications

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“…is linked to both types of soil. Its resistance to Hg is not included in the scientific literature, although some authors have described strains of this genus resistant to other heavy metal divalent cations like Cu, Ni, and Cd ( Chanda et al, 2017 ; Rosenfeld et al, 2018 ). Other authors describe the capacity of produce siderophores by some species ( Acquah et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Comparative Metagenomic Study of Rhizospheric and Bulk Mercury-Contaminated Soils in the Mining District of Almadén

et al. 2022

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Soil contamination by heavy metals, particularly mercury (Hg), is a problem that can seriously affect the environment, animals, and human health. Hg has the capacity to biomagnify in the food chain. That fact can lead to pathologies, of those which affect the central nervous system being the most severe. It is convenient to know the biological environmental indicators that alert of the effects of Hg contamination as well as the biological mechanisms that can help in its remediation. To contribute to this knowledge, this study conducted comparative analysis by the use of Shotgun metagenomics of the microbial communities in rhizospheric soils and bulk soil of the mining region of Almadén (Ciudad Real, Spain), one of the most affected areas by Hg in the world The sequences obtained was analyzed with MetaPhlAn2 tool and SUPER-FOCUS. The most abundant taxa in the taxonomic analysis in bulk soil were those of Actinobateria and Alphaproteobacteria. On the contrary, in the rhizospheric soil microorganisms belonging to the phylum Proteobacteria were abundant, evidencing that roots have a selective effect on the rhizospheric communities. In order to analyze possible indicators of biological contamination, a functional potential analysis was performed. The results point to a co-selection of the mechanisms of resistance to Hg and the mechanisms of resistance to antibiotics or other toxic compounds in environments contaminated by Hg. Likewise, the finding of antibiotic resistance mechanisms typical of the human clinic, such as resistance to beta-lactams and glycopeptics (vancomycin), suggests that these environments can behave as reservoirs. The sequences involved in Hg resistance (operon mer and efflux pumps) have a similar abundance in both soil types. However, the response to abiotic stress (salinity, desiccation, and contaminants) is more prevalent in rhizospheric soil. Finally, sequences involved in nitrogen fixation and metabolism and plant growth promotion (PGP genes) were identified, with higher relative abundances in rhizospheric soils. These findings can be the starting point for the targeted search for microorganisms suitable for further use in bioremediation processes in Hg-contaminated environments.

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Section: Discussionmentioning

confidence: 99%

Comparative Metagenomic Study of Rhizospheric and Bulk Mercury-Contaminated Soils in the Mining District of Almadén

et al. 2022

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“…It is worth noting that Gemmatimonas of the phylum Gemmatimonadetes, and Flavisolibacter and Chitinophaga of the phylum Bacteroides also exhibit heavy metal/metalloid resistance in this work. For example, Gemmatimonas is tolerant to As ( Li et al, 2021a ), Flavisolibacter is tolerant to Pb and Zn ( Kasemodel et al, 2019 ), and Chitinophaga is tolerant to Ni, Cu, Zn, and Cd ( Chanda et al, 2017 ). The interaction between bacteria and heavy metals is complex, making it a challenge to understand the basic mechanisms.…”

Section: Discussionmentioning

confidence: 99%

Effects of Heavy Metals/Metalloids and Soil Properties on Microbial Communities in Farmland in the Vicinity of a Metals Smelter

Wang²,

Liu³

et al. 2021

Front. Microbiol.

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Microorganisms play a fundamental role in biogeochemical cycling and are highly sensitive to environmental factors, including the physiochemical properties of the soils and the concentrations of heavy metals/metalloids. In this study, high-throughput sequencing of the 16S rRNA gene was used to study the microbial communities of farmland soils in farmland in the vicinity of a lead–zinc smelter. Proteobacteria, Acidobacteria, Actinobacteria, Bacteroidetes, and Gemmatimonadetes were the predominant phyla in the sites of interest. Sphingomonas, Gemmatimonas, Lysobacter, Flavisolibacter, and Chitinophaga were heavy metal-/metalloid-tolerant microbial groups with potential for bioremediation of the heavy metal/metalloid contaminated soils. However, the bacterial diversity was different for the different sites. The contents of heavy metal/metalloid species and the soil properties were studied to evaluate the effect on the soil bacterial communities. The Mantel test revealed that soil pH, total cadmium (T-Cd), and available arsenic played a vital role in determining the structure of the microbial communities. Further, we analyzed statistically the heavy metals/metalloids and the soil properties, and the results revealed that the microbial richness and diversity were regulated mainly by the soil properties, which correlated positively with organic matter and available nitrogen, while available phosphorus and available potassium were negatively correlated. The functional annotation of the prokaryotic taxa (FAPROTAX) method was used to predict the function of the microbial communities. Chemoheterotrophy and airborne chemoheterotrophy of the main microbial community functions were inhibited by soil pH and the heavy metals/metalloids, except in the case of available lead. Mantel tests revealed that T-Cd and available zinc were the dominant factors affecting the functions of the microbial communities. Overall, the research indicated that in contaminated soils, the presence of multiple heavy metals/metalloids, and the soil properties synergistically shaped the structure and function of the microbial communities.

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“…Phytoextraction is considered to be an environmentally friendly method for the extraction of heavy metals (Li et al, 2012;Sun et al, 2019). However, plants that are grown in tailings are at risk of heavy metal toxicity stress and irreversible damage, which lead to low biomass, thereby reducing remediation e ciency (Weyens et al, 2009;Chanda et al, 2017). Thence, e cient technologies must be introduced to improve the e ciency of phytoremediation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Herbaspirillum sp. p5-19 assisted with alien soil improvement on the phytoremediation of copper tailings by Vetiveria zizanioides L.

Fang

Huang

Wang

et al. 2021

Environ Sci Pollut Res

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This study investigated examined the potential of Herbaspirillum sp. p5-19 (p5-19) assisted with alien soil improvement on improving stress tolerance and enhancing the accumulation of Mn, Cu, Zn and Cd by vetiver grass (Vetiveria zizanioides). Phytoremediation potential was evaluated by plant biomass and the ability of plant to absorb and transfer heavy metals. Results showed that the biomass was increased by 19.64%-173.81% in p5-19 inoculation treatments with and without alien soil improvement compared with control. Meanwhile, photosynthetic pigment contents were enhanced in co-inoculation treatment (p5-19 with alien soil improvement). In addition, the malondialdehyde (MDA) content was decreased, and the activities of antioxidant enzymes such as ascorbate peroxidase (APX), superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were increased in p5-19 treatment, thereby alleviating the oxidative stress. Moreover, co-inoculation signi cantly (p<0.05) increased the concentrations of Mn, Cu, Zn and Cd in the roots and shoots of vetiver grass. In particular, the highest concentration of Mn, Zn and Cd in the shoots (roots) were obtained in C10 under p5-19 inoculation (C10B), which were 4. 44-(2.71-), 4.73-(3.87-) and 5.93-(4.35-) fold as that of the controls, respectively. These results provided basis for the change of phytoremediation ability of vetiver grass after inoculation. We concluded that p5-19 assisted with alien soil improvement was a potential strategy for enhancing phytoremediation ability in tailings.

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Tolerance of Microorganisms in Soil Contaminated with Trace Metals: An Overview

Cited by 7 publications

References 101 publications

Comparative Metagenomic Study of Rhizospheric and Bulk Mercury-Contaminated Soils in the Mining District of Almadén

Comparative Metagenomic Study of Rhizospheric and Bulk Mercury-Contaminated Soils in the Mining District of Almadén

Effects of Heavy Metals/Metalloids and Soil Properties on Microbial Communities in Farmland in the Vicinity of a Metals Smelter

Effects of Herbaspirillum sp. p5-19 assisted with alien soil improvement on the phytoremediation of copper tailings by Vetiveria zizanioides L.

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