Heavy Metal Tolerance and Biotransformation of Toxic Metal Compounds by New Isolates of Wood-Rotting Fungi from Thailand

Kaewdoung, Benjawan; Sutjaritvorakul, Thanawat; Gadd, Geoffrey M.; Whalley, A.J.S.; Sihanonth, Prakitsin

doi:10.1080/01490451.2015.1048394

Cited by 40 publications

(12 citation statements)

References 25 publications

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“…Their filamentous hyphal structure deeply penetrates in to the deeper soil aggregates and chelates or adsorbs HM. A study by Kaewdoung et al (2016) involving scanning electron microscopy equipped with energy dispersive X-ray microanalysis (SEM-EDXA) and X-ray powder diffraction (XRPD) revealed that oxalate crystals produced by wood-rotting fungi Fomitopsis cf. meliae and Ganoderma aff.…”

Section: Mechanisms Of Hm Remediation By Hmt-pgp Microbesmentioning

confidence: 99%

Alleviation of Heavy Metal Stress in Plants and Remediation of Soil by Rhizosphere Microorganisms

2017

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Increasing concentration of heavy metals (HM) due to various anthropogenic activities is a serious problem. Plants are very much affected by HM pollution particularly in contaminated soils. Survival of plants becomes tough and its overall health under HM stress is impaired. Remediation of HM in contaminated soil is done by physical and chemical processes which are costly, time-consuming, and non-sustainable. Metal–microbe interaction is an emerging but under-utilized technology that can be exploited to reduce HM stress in plants. Several rhizosphere microorganisms are known to play essential role in the management of HM stresses in plants. They can accumulate, transform, or detoxify HM. In general, the benefit from these microbes can have a vast impact on plant’s health. Plant–microbe associations targeting HM stress may provide another dimension to existing phytoremediation and rhizoremediation uses. In this review, applied aspects and mechanisms of action of heavy metal tolerant-plant growth promoting (HMT-PGP) microbes in ensuring plant survival and growth in contaminated soils are discussed. The use of HMT-PGP microbes and their interaction with plants in remediation of contaminated soil can be the approach for the future. This low input and sustainable biotechnology can be of immense use/importance in reclaiming the HM contaminated soils, thus increasing the quality and yield of such soils.

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Section: Mechanisms Of Hm Remediation By Hmt-pgp Microbesmentioning

confidence: 99%

Alleviation of Heavy Metal Stress in Plants and Remediation of Soil by Rhizosphere Microorganisms

2017

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“…Microorganisms can also secrete negatively charged metabolites, such as hydrogen phosphates, hydrogen carbonates, oxalates, or hydroxides. This process is called biomineralization and leads to extracellular precipitation and detoxification ( Merroun et al, 2011 ; Kaewdoung et al, 2016 ; Chandwadkar et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Cell Viability on Uranium Biomineralization by the Uranium Mine Isolate Penicillium simplicissimum

et al. 2021

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The remediation of heavy-metal-contaminated sites represents a serious environmental problem worldwide. Currently, cost- and time-intensive chemical treatments are usually performed. Bioremediation by heavy-metal-tolerant microorganisms is considered a more eco-friendly and comparatively cheap alternative. The fungus Penicillium simplicissimum KS1, isolated from the flooding water of a former uranium (U) mine in Germany, shows promising U bioremediation potential mainly through biomineralization. The adaption of P. simplicissimum KS1 to heavy-metal-contaminated sites is indicated by an increased U removal capacity of up to 550 mg U per g dry biomass, compared to the non-heavy-metal-exposed P. simplicissimum reference strain DSM 62867 (200 mg U per g dry biomass). In addition, the effect of temperature and cell viability of P. simplicissimum KS1 on U biomineralization was investigated. While viable cells at 30°C removed U mainly extracellularly via metabolism-dependent biomineralization, a decrease in temperature to 4°C or use of dead-autoclaved cells at 30°C revealed increased occurrence of passive biosorption and bioaccumulation, as confirmed by scanning transmission electron microscopy. The precipitated U species were assigned to uranyl phosphates with a structure similar to that of autunite, via cryo-time-resolved laser fluorescence spectroscopy. The major involvement of phosphates in U precipitation by P. simplicissimum KS1 was additionally supported by the observation of increased phosphatase activity for viable cells at 30°C. Furthermore, viable cells actively secreted small molecules, most likely phosphorylated amino acids, which interacted with U in the supernatant and were not detected in experiments with dead-autoclaved cells. Our study provides new insights into the influence of temperature and cell viability on U phosphate biomineralization by fungi, and furthermore highlight the potential use of P. simplicissimum KS1 particularly for U bioremediation purposes.Graphical Abstract

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“…34 The microbial group of fungi is able to create insoluble transition metal oxalate biominerals by excreting oxalic acid. 31,32,35 Crystallization-based separation processes are widely used in different fields of industry. A mixture of metal salts solution can be separated by fractional crystallization via a chemical reaction based on the different solubility products of the solid components.…”

Section: Introductionmentioning

confidence: 99%

“…In the field of environmental biotechnology, toxic metal compounds can be immobilized by biomineralization, providing metal biorecovery and bioremediation . A microbial group of fungi is able to create insoluble transition metal oxalate biominerals by excreting oxalic acid. ,, …”

Section: Introductionmentioning

confidence: 99%

Spatial Separation of Copper and Cobalt Oxalate by Flow-Driven Precipitation

Tóth–Szeles

Bohner

Tóth

et al. 2017

Crystal Growth & Design

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Precipitation reaction is investigated in a far from equilibrium system by introducing a continuous flow of the homogeneous mixture of water-soluble metal salts into sodium oxalate solution. The spreading gravity current maintained by the density difference between the solutions creates a radially symmetric precipitate pattern that contain spatially separated copper oxalate monohydrate and cobalt oxalate tetrahydrate, indentified by Xray diffraction measurements. In the transition zone, a unique crystalline composite containing copper oxalate plates with cobalt oxalate coating also forms.

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Heavy Metal Tolerance and Biotransformation of Toxic Metal Compounds by New Isolates of Wood-Rotting Fungi from Thailand

Cited by 40 publications

References 25 publications

Alleviation of Heavy Metal Stress in Plants and Remediation of Soil by Rhizosphere Microorganisms

Alleviation of Heavy Metal Stress in Plants and Remediation of Soil by Rhizosphere Microorganisms

Effect of Temperature and Cell Viability on Uranium Biomineralization by the Uranium Mine Isolate Penicillium simplicissimum

Spatial Separation of Copper and Cobalt Oxalate by Flow-Driven Precipitation

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