Environmental Mn(II) enhances the activity of dissimilatory arsenate-respiring prokaryotes from arsenic-contaminated soils

Wu, Yan; Wu, Weiwei; Xu, Yifan; Zuo, Yanxia; Zeng, Xian‐Chun

doi:10.1016/j.jes.2022.03.013

Cited by 5 publications

(5 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sulfate can promote bacterial metabolism, leading to increased arrA gene expression per DARP cell . Furthermore, manganese enhances bacterial resistance to arsenic and promotes bacterial growth, thereby further increasing arrA gene expression . Conversely, there are environmental factors that negatively regulate arrA gene expression level.…”

Section: Resultsmentioning

confidence: 99%

“…29 Furthermore, manganese enhances bacterial resistance to arsenic and promotes bacterial growth, thereby further increasing arrA gene expression. 33 Conversely, there are environmental factors that negatively regulate arrA gene expression level. In the case of Shewanella sp.…”

Section: Effects Of Nitrate On the Copies And Expression Level Of As(...mentioning

confidence: 99%

“…70 Genomic DNA of the isolated strain was prepared using a boiling method. 56 A sequence of 16S rRNA gene was thus amplified with PCR, 33 and the generated DNA was mailed to Shenggong Biotechnology Corp. for sequencing. The obtained sequences were each searched against GenBank.…”

Section: Metagenomic Sequencing and Annotationsmentioning

confidence: 99%

“…Recent investigations suggest that environmental factors, such as sulfate, manganese chloride, humic acid, and phosphate, significantly affect the DARPs-mediated reductive mobilization of As in contaminated soils and sediments through interfering the bacterial activities or growth. – Additionally, nitrate stands as another commonly seen environmental contaminant. Most nitrate contaminants are derived from agricultural fertilizers, microbial degradation of plant residues and animal manure, industrial wastewater, as well as weathering and transformation of N-bearing ore minerals. , In uncultivated soils, nitrate contents vary between 5 and 10 mg/kg.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Contradictory Impacts of Nitrate on the Dissimilatory Arsenate-Respiring Prokaryotes-Induced Reductive Mobilization of Arsenic from Contaminated Sediments: Mechanism Insight from Metagenomic and Functional Analyses

Zeng,

Xu,

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: Effects Of Nitrate On the Copies And Expression Level Of As(...mentioning

confidence: 99%

Section: Metagenomic Sequencing and Annotationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Contradictory Impacts of Nitrate on the Dissimilatory Arsenate-Respiring Prokaryotes-Induced Reductive Mobilization of Arsenic from Contaminated Sediments: Mechanism Insight from Metagenomic and Functional Analyses

Zeng,

Xu,

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

“…This process can be coupled with the oxidation of organic matter or methane as electron donors [17,18]. This process can increase the arsenic concentration in groundwater by several orders of magnitude [19,20]. Another microbial process that can influence arsenic mobilization is the oxidation of As(III) to As(V), immobilizing it on the surface of Fe or Mn oxides [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A Novel Mn- and Fe-Oxides-Reducing Bacterium with High Activity to Drive Mobilization and Release of Arsenic from Soils

Xiong

et al. 2023

Water

Self Cite

View full text Add to dashboard Cite

Since Mn, Fe and As contaminants often coexist in the environment, we hypothesize that the presence of multifunctional bacteria is capable of reducing Mn and Fe oxides and promoting the mobilization and release of arsenic. However, such bacteria have not been reported yet; moreover, the impact of bacteria with the ability to simultaneously reduce Mn and Fe oxides on the formation of high-arsenic groundwater remains unclear. This study aims to address this question. Here, we found that the microbial community in the soils was able to efficiently reduce Mn oxides into Mn(II). An analysis of the microbial community structures of the soil shows that it contained Proteobacteria (41.1%), Acidobacteria (10.9%), Actinobacteria (9.5%) and other less abundant bacteria. Based on this observation, we successfully isolated a novel bacterium Cellulomonas sp. CM1, which possesses both Mn- and Fe-oxide-reducing activities. Under anaerobic conditions, strain CM1 can reduce Mn oxides, resulting in the production of 13 mg/L of Mn(II) within a span of 10 days. Simultaneously, it can reduce Fe oxides, leading to the generation of 9 mg/L of Fe(II) within 9 days when a yeast extract is used as an electron donor. During these reduction reactions, the cells were grown into a density of OD600 0.16 and 0.09, respectively, suggesting that Mn(IV) is more beneficial for the bacterial growth than Fe(III). Arsenic release assays indicate that after 108 days of anoxic incubation, approximately 126.2, 103.2 and 81.5 μg/L As(V) were mobilized and released from three soil samples, respectively, suggesting that CM1 plays significant roles in driving mobilization of arsenic from soils. These findings shed new light on the microbial processes that lead to the generation of arsenic-contaminated groundwater.

show abstract

Functional features of a novel Sb(III)- and As(III)-oxidizing bacterium: Implications for the interactions between bacterial Sb(III) and As(III) oxidation pathways

Chen,

Yu,

Zeng

2024

Chemosphere

View full text Add to dashboard Cite

Environmental Mn(II) enhances the activity of dissimilatory arsenate-respiring prokaryotes from arsenic-contaminated soils

Cited by 5 publications

References 53 publications

Contradictory Impacts of Nitrate on the Dissimilatory Arsenate-Respiring Prokaryotes-Induced Reductive Mobilization of Arsenic from Contaminated Sediments: Mechanism Insight from Metagenomic and Functional Analyses

Contradictory Impacts of Nitrate on the Dissimilatory Arsenate-Respiring Prokaryotes-Induced Reductive Mobilization of Arsenic from Contaminated Sediments: Mechanism Insight from Metagenomic and Functional Analyses

A Novel Mn- and Fe-Oxides-Reducing Bacterium with High Activity to Drive Mobilization and Release of Arsenic from Soils

Functional features of a novel Sb(III)- and As(III)-oxidizing bacterium: Implications for the interactions between bacterial Sb(III) and As(III) oxidation pathways

Contact Info

Product

Resources

About