Arsenate reduction and mobilization in the presence of indigenous aerobic bacteria obtained from high arsenic aquifers of the Hetao basin, Inner Mongolia

Guo, Huaming; Liu, Zeyun; Ding, Susu; Hao, Chunbo; Xiu, Wei; Hou, Weiguo

doi:10.1016/j.envpol.2015.03.034

Cited by 83 publications

(32 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microorganisms are primarily used in the bioremediation to degrade or detoxify the As into harmless and less toxic forms. Several microbial processes involve the removal of As in soil and water, including oxidation, reduction, adsorption and microbemediated electron transfer (Diesel et al 2009;Guo et al 2015). Generally As is toxic to microorganisms; however, several microorganisms gain the energy for rapid growth by metabolizing the As Stolz 2003, 2005).…”

Section: Introductionmentioning

confidence: 99%

Isolation, identification and characterization of arsenic transforming exogenous endophytic Citrobacter sp. RPT from roots of Pteris vittata

Selvankumar¹,

Ramachandran²,

Mythili³

et al. 2017

3 Biotech

View full text Add to dashboard Cite

The aim of the present study was to assess the arsenic (As) transformation potential of endophytic bacteria isolated from roots of Pteris vittata plant. The endophytic bacterium was tested for minimal inhibitory concentration (MIC) against As. The endophytic strain RPT exhibited the highest resistance to As(V) (400 mg/l). Phylogenetic analysis of the 16S rRNA sequence suggested that strain RPT was a member of genus Citrobacter. The As transformation assay revealed As(III) oxidation and As(V) reduction potential of Citrobacter sp. RPT. The As resistance mechanism was further confirmed by amplification of arsC and aoxB genes. The growth kinetics of strain RPT was altered slightly in the presence of different concentration (100-400 mg/l) of As stress. Temperature and pH influenced the As removal rate. The maximum As removal was observed at pH 7.0 (74%) and 37°C (70.9%). The results suggest that strain RPT can survive under the As stress and has been identified as a potential candidate for application in bioremediation of As in contaminated environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Isolation, identification and characterization of arsenic transforming exogenous endophytic Citrobacter sp. RPT from roots of Pteris vittata

Selvankumar¹,

Ramachandran²,

Mythili³

et al. 2017

3 Biotech

View full text Add to dashboard Cite

show abstract

“…Arsenite oxidase genes (aoxS,-R,-A,-B,-C,-D) were found in Alkalilimnicola ehrlichii strain MLHE-1, Alcaligenes faecalis, Chloroglexi sp., Marinobacteria sp. SeaH-As6w, Acinetobacter junii SeaH-As6s, Ochrobacterium tritici SCII24, and a-, b-, and g-Proteobacterium (Oremland et al, 2009;Paul et al, 2015;Guo et al, 2015). Arsenic detoxification and metabolism processes suggested that aoxS-aoxR are the lead genes, and mediate regulatory control of aoxAB, and the transformation potential of As species.…”

Section: Introductionmentioning

confidence: 98%

Biotransformation of arsenite and bacterial aox activity in drinking water produced from surface water of floating houses: Arsenic contamination in Cambodia

Chang¹

2015

Environmental Pollution

View full text Add to dashboard Cite

“…The measurement of these antioxidants makes it possible to highlight the degree of adaptation of bacteria to heavy metals (or metalloids) and therefore their possible use in the bioremediation of soils contaminated by them. Set apart from the description of some resistance mechanisms (efflux pump, methylation, complexation, oxidation-reduction reactions and microbe mediated electron transfert) of bacteria against heavy metals and metalloids, in particular antimony [11,12], the role of the antioxidant system in bacteria towards this metalloid remains poorly described [10].…”

Section: Introductionmentioning

confidence: 99%

Antioxidative Enzyme Responses to Antimony Stress of Serratia marcescens – an Endophytic Bacteria of Hedysarum pallidum Roots

Laouar¹,

Mechakra²,

Rodrigue³

et al. 2019

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Studies on bacterial endophytes resistant to antimony (Sb), a pollutant deemed alarming, are virtually non-existent. An endophytic bacterial strain showing resistance to high antimony concentrations was isolated for the first time from the roots of Hedysarum pallidum Desf., a Sb accumulator Fabacea growing on mining spoils. With the combined use of morphological, biochemical and molecular methods, the isolated strain was identified as Serratia marcescens species. It showed a minimum inhibitory concentration (MIC) to its growth at 450 mM of Sb. In the presence of excessive concentrations of Sb, corresponding to 30 mM of Sb, i.e., 3652.8 mg/L of Sb, the strain maintained important growth compared to the control. The Sb toxicity caused a significant increase (p<0.05) in the hydrogen peroxide (H 2 O 2 ) amount and malondialdehyde (MDA) content. The oxidative stress induced significant increases (p<0.05) in the strain antioxidant biomarkers such as proline, catalase (CAT), ascorbate peroxidase (APX), peroxidase (POD) and superoxide dismutase (SOD). Significant and positive correlations (p<0.05) were found between oxidative and antioxidant biomarkers and between antioxidant biomarkers, highlighting the interrelationships between them in oxidative stress fighting. Results show an important adaptation of the strain to high Sb levels that can be used in the Sb-contaminated soils bioremediation.

show abstract

Arsenate reduction and mobilization in the presence of indigenous aerobic bacteria obtained from high arsenic aquifers of the Hetao basin, Inner Mongolia

Cited by 83 publications

References 74 publications

Isolation, identification and characterization of arsenic transforming exogenous endophytic Citrobacter sp. RPT from roots of Pteris vittata

Isolation, identification and characterization of arsenic transforming exogenous endophytic Citrobacter sp. RPT from roots of Pteris vittata

Biotransformation of arsenite and bacterial aox activity in drinking water produced from surface water of floating houses: Arsenic contamination in Cambodia

Antioxidative Enzyme Responses to Antimony Stress of Serratia marcescens – an Endophytic Bacteria of Hedysarum pallidum Roots

Contact Info

Product

Resources

About