Microbial reduction of selenium oxyanions: energy-yielding and detoxification reactions

Lampis, Silvia; Vallini, Giovanni

doi:10.2166/9781789061055_0101

Cited by 2 publications

(2 citation statements)

References 117 publications

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“…have been reported in the last years to efficiently reduce Se oxyanions (Faramarzi et al, 2020 ; Herrero & Wellinger, 2015 ; Hussein et al, 2022 ; Liang et al, 2019 ). The molecular mechanisms proposed to be involved in the metabolic reduction pathway of inorganic Se to Se 0 are very similar to those reported for bacteria (Herrero & Wellinger, 2015 ; Lampis & Vallini, 2021 ). Interestingly, rhizosphere fungi isolated from Se‐resistant plants in polluted sites are not inhibited in the presence of this element (Shoeibi et al, 2017 ).…”

Section: Biological Synthesis Of Sesupporting

confidence: 79%

Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications

Ruiz-Fresneda

Staicu

Lazuén-López

et al. 2023

Microbial Biotechnology

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Elemental selenium (Se 0 ) nanomaterials undergo allotropic transition from thermodynamically-unstable to more stable phases. This process is significantly different when Se 0 nanoparticles (NPs) are produced via physico-chemical and biological pathways. While the allotropic transition of physico-chemically synthesized Se 0 is fast (minutes to hours), the biogenic Se 0 takes months to complete. The biopolymer layer covering biogenic Se 0 NPs might be the main factor controlling this retardation, but this still remains an open question. Phylogenetically-diverse bacteria reduce selenium oxyanions to red amorphous Se 0 allotrope, which has low market value. Then, red Se 0 undergoes allotropic transition to trigonal (metallic grey) allotrope, the end product having important industrial applications (e.g. semiconductors, alloys). Is it not yet clear whether biogenic Se 0 presents any biological function, or it is mainly a detoxification and respiratory by-product. The better understanding of this transition would benefit the recovery of Se 0 NPs from secondary resources and its targeted utilization with respect to each allotropic stage. This review article presents and critically discusses the main physico-chemical methods and biosynthetic pathways of Se 0 (bio)mineralization. In addition, the article proposes a conceptual model for the resource recovery potential of trigonal selenium nanomaterials in the context of circular economy.

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Section: Biological Synthesis Of Sesupporting

confidence: 79%

Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications

Ruiz-Fresneda

Staicu

Lazuén-López

et al. 2023

Microbial Biotechnology

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“…These gene expression changes indicated that 200 mg/kg selenite had no negative effects on G. lucidum JNUSE-200, and it was not necessary to activate the expression of these genes to overcome adversity. G. lucidum CGMCC 5.26 needed to activate the high expression of these genes to transform selenite to a lower valence state of Se, reducing its toxic effect ( Supplementary Figure S2 ) [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

The Performance and Evolutionary Mechanism of Ganoderma lucidum in Enhancing Selenite Tolerance and Bioaccumulation

Xu,

Meng,

Zhu

et al. 2024

JoF

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Background: Selenium (Se) pollution poses serious threats to terrestrial ecosystems. Mushrooms are important sources of Se with the potential for bioremediation. Pre-eminent Se resources must possess the ability to tolerate high levels of Se. To obtain Se-accumulating fungi, we isolated selenite-tolerance-enhanced Ganoderma lucidum JNUSE-200 through adaptive evolution. Methods: The molecular mechanism responsible for selenite tolerance and accumulation was explored in G. lucidum JNUSE-200 by comparing it with the original strain, G. lucidum CGMCC 5.26, using a combination of physiological and transcriptomic approaches. Results: G. lucidum JNUSE-200 demonstrated tolerance to 200 mg/kg selenite in liquid culture and exhibited normal growth, whereas G. lucidum CGMCC 5.26 experienced reduced growth, red coloration, and an unpleasant odor as a result of exposure to selenite at the same concentration. In this study, G. lucidum JNUSE-200 developed a triple defense mechanism against high-level selenite toxicity, and the key genes responsible for improved selenite tolerance were identified. Conclusions: The present study offers novel insights into the molecular responses of fungi towards selenite, providing theoretical guidance for the breeding and cultivation of Se-accumulating varieties. Moreover, it significantly enhances the capacity of the bio-manufacturing industry and contributes to the development of beneficial applications in environmental biotechnology through fungal selenite transformation bioprocesses.

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Microbial reduction of selenium oxyanions: energy-yielding and detoxification reactions

Cited by 2 publications

References 117 publications

Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications

Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications

The Performance and Evolutionary Mechanism of Ganoderma lucidum in Enhancing Selenite Tolerance and Bioaccumulation

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