Effects of Cd and Pb on diversity of microbial community and enzyme activity in soil

Xiao, Lei; Yu, Zijing; Liu, Haiqin; Tan, Tiong Kai; Jian, Yao; Zhang, Yixin; Wu, Jianjun

doi:10.1007/s10646-020-02205-4

Cited by 39 publications

(20 citation statements)

References 24 publications

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“…5). Similar to our findings, Xiao et al [49] has reported that HM (Cd and Pb) pollution negatively impacts on microbial growth, diversity and enzyme activity in soil. It suffices to speculate that extreme HM pollution towards the upper limit for cellular life significantly reduces P. australis rhizospheric bacterial community size and functional activity.…”

Section: Catabolic Activity Of Bacterial Community Exhibited Amd Pollution-dependent Gradientsupporting

confidence: 93%

Correlations Between Root Metabolomics and Bacterial Community Structures in the Phragmites australis Under Acid Mine Drainage-Polluted Wetland Ecosystem

et al. 2021

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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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Section: Catabolic Activity Of Bacterial Community Exhibited Amd Pollution-dependent Gradientsupporting

confidence: 93%

Correlations Between Root Metabolomics and Bacterial Community Structures in the Phragmites australis Under Acid Mine Drainage-Polluted Wetland Ecosystem

et al. 2021

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“…Cadmium and lead have been reported to inhibit microbial population and enzymes activity in both aquatic and soil environment. For instance, increasing the concentrations of cadmium and lead in soil were reported to gradually decrease the microbial community and enzymes [23,24]. Similarly, lead was reported to inhibit βgalactosidase activity in Providencia stuartii, Aeromonas dhakensis and Pantoea dispersa, with IC 50S 0.0007 ± 0.002 mg/l (≈ 3.38 x10 -6 mM), 0.0016 ± 0.030 mg/l (≈ 7.72 x10 -6 mM) and 0.0009 ± 0.012 mg/l (≈ 4.34 x10 -6 mM) respectively [25].…”

Section: Discussionmentioning

confidence: 99%

Predicting the Toxicities of Ternary Mixtures of two Metals and Sodium Dodecyl Sulfate to Serratia marcescens (SerEW01) from Otamiri River Water

Okechi

Chukwura

Nweke

2020

JAMB

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Background: Otamiri river server as a source of water for domestic activities, urban farming, recreation, aquatic foods in Owerri and environs. It also receives untreated domestic, industrial and agricultural waste water and run offs from the municipality. Seepages from solid wastes dumps at the river banks and sand mining activity going on in the river could also constitute environmental hazards Aims: This study aims at evaluating the interactive effects of the ternary mixtures of sodium dodecyl sulfate (SDS) and some divalent metals on preponderant bacterium (Serratia marcescens (SerEW01)) from the river. Study Design: Fixed ratio ray design was used for the study, with inhibition of dehydrogenase activity as end point. Place and Duration of Study: Owerri, Imo State, Nigeria, June – December, 2019. Methodology: The bacterium was earlier isolated as the preponderant bacterium isolate from the river water. Fixed ratio ternary mixtures (Equieffect concentration (EEC50) and arbitrary concentration (ABCR) ratios), SDS + Pb + Zn, SDS + Cd +Zn, SDS + Pb +Ni, SDS + Ni + Cd, SDS + Co + Pb and SDS + Co + Cd were designed to evaluate the combined toxicities of these toxicants. Toxicities predicted by concentration addition (CA) and independent action (IA) models were compared with the experimentally observed toxicities. Results: The EC50S observed ranged from 0.046 ± 0.003 mM (Zn) to 2.329 ± 0.092 mM (SDS). The EC50S of the toxicants were statistically different from each other (P<0.05). The order of increasing toxicities were SDS >Pb >Ni > Co > Cd(II) >Zn. Concentration-dependent toxicities with progressive inhibition of the dehydrogenase activity as the concentration increased were observed.. In all ternary mixtures, both the experimentally derived, CA and IA-predicted EC50S were statistically different from each other. Both models predicted lower toxicities compared to the experimental data. The Toxic Index and Model Deviation Ratio indicated synergistic interaction of SDS and metal ions against S. marcescens (SerEW01) Conclusion: This study could constitute base line information towards assessing the possible environmental hazards associated with co-contamination of the environment by SDS and divalent heavy metals, more so when both pollutants are common aquatic pollutants.

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“…The phylogenetically unrelated CdtB that form the Cdtolerant group are very active in polluted soils, when compared with other members of the total community. The group´s populations increase with increases in Cd concentration due to their tolerance, resilience capacities and prior stability (Griffiths and Philippot 2013;Xiao et al 2020). In this way, both, the transcriptional factors involving physiological responses of tolerance and adaptation to the environmental disturbance of CdtB role are key elements to understand how active they are.…”

Section: Introductionmentioning

confidence: 99%

Cadmium‐tolerant bacteria: current trends and applications in agriculture

Bravo

Braissant

2021

Letters Applied Microbiology

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Significance and Impact of the Study: Crop production is adversely affected by the presence of heavy metals in soils dedicated to agriculture. These metals ultimately accumulate in seeds or edible parts and enter the human food chain. The application of cadmium (Cd)-tolerant bacteria capacities for Cd immobilization and sequestration, in combination with soil management and implementation of other agronomic practices, may reduce the Cd levels in farmlands.

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Effects of Cd and Pb on diversity of microbial community and enzyme activity in soil

Cited by 39 publications

References 24 publications

Correlations Between Root Metabolomics and Bacterial Community Structures in the Phragmites australis Under Acid Mine Drainage-Polluted Wetland Ecosystem

Correlations Between Root Metabolomics and Bacterial Community Structures in the Phragmites australis Under Acid Mine Drainage-Polluted Wetland Ecosystem

Predicting the Toxicities of Ternary Mixtures of two Metals and Sodium Dodecyl Sulfate to Serratia marcescens (SerEW01) from Otamiri River Water

Cadmium‐tolerant bacteria: current trends and applications in agriculture

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