A Critical Review of Resistance and Oxidation Mechanisms of Sb-Oxidizing Bacteria for the Bioremediation of Sb(III) Pollution

Deng, Renjian; Chen, Yilin; Deng, Xinping; Huang, Zhongjie; Zhou, Saijun; Ren, Bin; Jin, Guizhong; Hursthouse, Andrew

doi:10.3389/fmicb.2021.738596

Cited by 40 publications

(8 citation statements)

References 156 publications

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“…This is an antimony-resistance detoxification mechanism in SbRM and becomes predominant in stress conditions. However, the excess Sb(III) accumulation might disrupt the redox balance and lead an oxidation of Sb(III) . Therefore, the Sb(V) loading should be controlled to avoid cytoplasm Sb(V) reduction lead the route and make the dissimilatory in main route.…”

Section: Resultsmentioning

confidence: 99%

Dissimilatory and Cytoplasmic Antimonate Reductions in a Hydrogen-Based Membrane Biofilm Reactor

Zhou

Pang

et al. 2022

Environ. Sci. Technol.

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A hydrogen-based membrane biofilm reactor (H2-MBfR) was operated to investigate the bioreduction of antimonate [Sb(V)] in terms of Sb(V) removal, the fate of Sb, and the pathways of reduction metabolism. The MBfR achieved up to 80% Sb(V) removal and an Sb(V) removal flux of 0.55 g/m2·day. Sb(V) was reduced to Sb(III), which mainly formed Sb2O3 precipitates in the biofilm matrix, although some Sb(III) was retained intracellularly. High Sb(V) loading caused stress that deteriorated performance that was not recovered when the high Sb(V) loading was removed. The biofilm community consisted of DSbRB (dissimilatory Sb-reduction bacteria), SbRB (Sb-resistant bacteria), and DIRB (dissimilatory iron-reducing bacteria). Dissimilatory antimonate reduction, mediated by the respiratory arsenate reductase ArrAB, was the main reduction route, but respiratory reduction coexisted with cytoplasmic Sb(V)-reduction mediated by arsenate reductase ArsC. Increasing Sb(V) loading caused stress that led to increases in the expression of arsC gene and intracellular accumulation of Sb(III). By illuminating the roles of the dissimilatory and cytoplasmic Sb(V) reduction mechanism in the biofilms of the H2-MBfR, this study reveals that the Sb(V) loading should be controlled to avoid stress that deteriorates Sb(V) reduction.

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Section: Resultsmentioning

confidence: 99%

Dissimilatory and Cytoplasmic Antimonate Reductions in a Hydrogen-Based Membrane Biofilm Reactor

Zhou

Pang

et al. 2022

Environ. Sci. Technol.

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“…Indeed, Sb(III) oxidation has been frequently reported in this T h i s c o n t e n t i s region, 20,21 which can reduce the toxicity of Sb given that Sb(III) is more toxic than Sb(V). 22,23 Our previous studies indicated diverse diazotrophic communities in this region. 24,25 Therefore, the investigation of Sb-dependent BNF has important environmental implications for improving N fertilizer efficiency and managing Sb toxicity in the environment.…”

Section: ■ Introductionmentioning

confidence: 82%

“…The giant Sb metallogenic belt in South China (South China Sb belt) is the major Sb deposit in China, with >500 Sb deposits within the transition zone between the Yangtze river and Cathaysia blocks in southern China. − The extensive Sb mining activities cause severe soil, sediment, and water contamination in this region. − Given the oligotrophic geochemical conditions and high concentrations of Sb in this region, , it is fair to propose that Sb-dependent BNF may be widespread among these Sb-contaminated regions. Indeed, Sb(III) oxidation has been frequently reported in this region, , which can reduce the toxicity of Sb given that Sb(III) is more toxic than Sb(V). , Our previous studies indicated diverse diazotrophic communities in this region. , Therefore, the investigation of Sb-dependent BNF has important environmental implications for improving N fertilizer efficiency and managing Sb toxicity in the environment.…”

Section: Introductionmentioning

confidence: 88%

Chemolithotrophic Biological Nitrogen Fixation Fueled by Antimonite Oxidation May Be Widespread in Sb-Contaminated Habitats

Guo

Yang

et al. 2022

Environ. Sci. Technol.

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Nitrogen (N) deficiency in mining-contaminated habitats usually hinders plant growth and thus hampers tailing revegetation. Biological N fixation (BNF) is an essential biogeochemical process that contributes to the initial accumulation of N in oligotrophic mining-contaminated regions. Previous studies reported that chemolithotrophic rather than heterotrophic diazotrophs frequently dominated in the mining-contaminated regions. Chemolithotrophic diazotrophs may utilize elements abundant in such habitats (e.g., sulfur (S), arsenic (As), and antimony (Sb)) as electron donors to fix N 2 . BNF fueled by the oxidation of S and As has been detected in previous studies. However, BNF fueled by Sb(III) oxidation (Sb-dependent BNF) has never been reported. The current study observed the presence of Sb-dependent BNF in slurries inoculated from Sb-contaminated habitats across the South China Sb belt, suggesting that Sb-dependent BNF may be widespread in this region. DNA-stable isotope probing identified bacteria associated with Rhodocyclaceae and Rhizobiaceae as putative microorganisms responsible for Sb-dependent BNF. Furthermore, metagenomicbinning demonstrated that Rhodocyclaceae and Rhizobiaceae contained essential genes involved in Sb(III) oxidation, N 2 fixation, and carbon fixation, suggesting their genetic potential for Sb-dependent BNF. In addition, meta-analysis indicated that these bacteria are widespread among Sb-contaminated habitats with different niche preferences: Rhodocyclaceae was enriched in river sediments and tailings, while Rhizobiaceae was enriched only in soils. This study may broaden our fundamental understanding of N fixation in Sbmining regions.

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“…Sb's toxicity extends with to plants, animals, and humans, with excess intake linked to serious health issues including cancers, cardiovascular and liver disease as well as respiratory disorders [4]. In plants, Sb toxicity manifests as inhibited growth and development, evidenced by alterations in root morphology and reduced root system development [5][6][7]. Kabata and Pendias [8] suggest that Sb levels exceeding 5-10 mg kg −1 Sb in plant tissues can be detrimental, significantly reducing seed germination, shoot and root growth, and ultimately impacting plants growth and production.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi elevate maize plant tolerance to Antimony, enhancing the nutritive value of seeds

Zrig,

Jerbi,

Labrecque

et al. 2024

Preprint

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The rise in industrial activity has resulted in an escalating threat antimony (Sb) buildups and biomagnifications in both plants and humans. Arbuscular mycorrhizal fungi (AMF) have been thoroughly investigated as a soil enhancement due to their ability to decrease the accumulation of many heavy metals in plant tissues. However, a quantitative and data-based consensus has yet to be reached on the effect of AMF application on maize plants, focusing on plant growth, nutrient content, and antioxidant properties in maize grains subjected to antimony treatment. A notable decrease in AMF-related parameters, including colonization, hyphal length, and arbuscules, was noted when AMF was combined with Sb compared to AMF alone. The AMF treatment alone enhanced plant growth, as indicated by the increased fresh and dry biomass, while Sb treatment alone reduced substantially the total fresh (66%) and dray weight (65%). However, combining AMF with Sb resulted in significant variations in macro- and micronutrients in maize grains. Notably, the combined AMF and Sb treatment influenced the nutritional value of maize grains, showing increased levels of organic acids, amino acids, and fatty acids compared to control. Furthermore, antioxidant activity of maize grains was enhanced by AMF inoculation, as indicated by high levels of polyphenols (39%), flavonoids (63%), ascorbic acid (ASC) (71%), and glutathione (GSH) (28%) content as response to Sb application. Also, a 33% rise in total tocopherol was noted, reflecting comparable upward trends. These findings suggest that the co-application of AMF and Sb can positively influence maize nutritional quality and antioxidant properties of maize grains, offering benefits for sustainable agricultural practices.

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A Critical Review of Resistance and Oxidation Mechanisms of Sb-Oxidizing Bacteria for the Bioremediation of Sb(III) Pollution

Cited by 40 publications

References 156 publications

Dissimilatory and Cytoplasmic Antimonate Reductions in a Hydrogen-Based Membrane Biofilm Reactor

Dissimilatory and Cytoplasmic Antimonate Reductions in a Hydrogen-Based Membrane Biofilm Reactor

Chemolithotrophic Biological Nitrogen Fixation Fueled by Antimonite Oxidation May Be Widespread in Sb-Contaminated Habitats

Arbuscular mycorrhizal fungi elevate maize plant tolerance to Antimony, enhancing the nutritive value of seeds

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