Bioremoval of Different Heavy Metals by the Resistant Fungal Strain<i>Aspergillus niger</i>

Rodríguez, Ismael Acosta; González, Juan Fernando Cárdenas; Pérez, Adriana Rodríguez; Oviedo, Juana Tovar; Juárez, Víctor Manuel Martínez

doi:10.1155/2018/3457196

Cited by 64 publications

(24 citation statements)

References 28 publications

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“…As co-adaptation between plants and its rhizospheric soil microbiota is essential to cope with edaphic stresses under extreme environment, the observed higher abundance of members of phylum Ascomycota belonging to class Dothideomycetes and Eurotiomycetes imply they could be playing important roles in the ecology and stability of P. australis under such extreme environment. Several studies have reported that filamentous fungal genera such as Aspergillus , Mucor , and Trichoderma [ 52 , 53 , 54 ], Rhodotorula [ 55 ], Rhizopus [ 56 ], and Penicillium [ 57 ] are adaptable to environmental heavy metal contamination, detoxify them through inherent mechanisms such as transformation, crystallization, extracellular precipitation, complexation, and cellular absorption [ 57 , 58 , 59 ]. In this study, members of genera Penicillium , Candida , Saccharomycetales , Vishniacozyma , Trichoderma , Cladosporium , and unclassified Didymellaceae were highly enriched in the root endosphere and rhizospheric samples from AMD sites compared to the non-AMD site ( Figure 3 c).…”

Section: Discussionmentioning

confidence: 99%

Fungal and metabolome diversity of the rhizosphere and endosphere of Phragmites australis in an AMD-polluted environment

Kalu

Ogola

Selvarajan

et al. 2021

Heliyon

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Symbiotic associations with rhizospheric microbial communities coupled with the production of metabolites are key adaptive mechanisms by metallophytes to overcome metal stress. However, little is known about pseudometallophyte Phragmites australis interactions with fungal community despite commonly being applied in wetland phytoremediation of acid mine drainage (AMD). In this study, fungal community diversity and metabolomes production by rhizosphere and root endosphere of P. australis growing under three different AMD pollution gradient were analyzed. Our results highlight the following: 1) Ascomycota and Basidiomycota were dominant phyla, but the diversity and richness of taxa were lower within AMD sites with Penicillium , Candida , Saccharomycetales , Vishniacozyma , Trichoderma , Didymellaceae , and Cladosporium being enriched in the root endosphere and rhizosphere in AMD sites than non-AMD site; 2) non-metric multidimensional scaling (NMDS) of 73 metabolomes revealed spatially defined metabolite exudation by distinct root parts (rhizosphere vs endosphere) rather than AMD sites, with significant variability occurring within the rhizosphere correlating to pH, TDS, Fe, Cr, Cu and Zn content changes; 3) canonical correspondence analysis (CCA) confirmed specific rhizospheric fungal taxonomic changes are driven by pH, TDS, heavy metals, and stress-related metabolomes produced. This is the first report that gives a snapshot on the complex endophytic and rhizospheric fungal community structure and metabolites perturbations that may be key in the adaptability and metal phytoremediation by P. australis under AMD environment.

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Section: Discussionmentioning

confidence: 99%

Fungal and metabolome diversity of the rhizosphere and endosphere of Phragmites australis in an AMD-polluted environment

Kalu

Ogola

Selvarajan

et al. 2021

Heliyon

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“…In recent years, the bioremoval mechanisms of heavy metals by some fungal species has been partially studied ( Figures 2 , 3 ) and the efficiency of such fungal species to remove heavy metals determined. But still, some mechanisms are not well understood ( Suhasini et al, 1999 ; Taştan et al, 2010 ; Mathew et al, 2016 ; Acosta-Rodríguez et al, 2018 ). The sophisticated cell wall structure profoundly influences the biosorption of heavy metals by fungal species ( Table 1 ).…”

Section: Biosorption Mechanisms Of Heavy Metals By Microbiotamentioning

confidence: 99%

Recent Advances in Biosorption of Copper and Cobalt by Filamentous Fungi

et al. 2020

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Copper (Cu) and Cobalt (Co) are among the most toxic heavy metals from mining and other industrial activities. Both are known to pose serious environmental concerns, particularly to water resources, if not properly treated. In recent years several filamentous fungal strains have been isolated, identified and assessed for their heavy metal biosorption capacity for potential application in bioremediation of Cu and Co wastes. Despite the growing interest in heavy metal removal by filamentous fungi, their exploitation faces numerous challenges such as finding suitable candidates for biosorption. Based on current findings, various strains of filamentous fungi have high metal uptake capacity, particularly for Cu and Co. Several works indicate that Trichoderma, Penicillium, and Aspergillus species have higher Cu and Co biosorption capacity compared to other fungal species such as Geotrichum, Monilia, and Fusarium. It is believed that far more fungal species with even higher biosorption capability are yet to be isolated. Furthermore, the application of filamentous fungi for bioremediation is considered environmentally friendly, highly effective, reliable, and affordable, due to their low technology pre-requisites. In this review, we highlight the capacity of various identified filamentous fungal isolates for biosorption of copper and cobalt from various environments, as well as their future prospects.

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“…Lab-scale and greenhouse experiments validate soil HM mycoremediation performance [ 24 , 31 , 39 ]. Similarly, effective recovery of HMs from contaminated water by fungi as biosorbents has also been demonstrated at small-scales [ 45 , 46 , 47 , 48 ]. Fungal biosorbents were extensively studied by previous researchers [ 46 , 47 , 48 , 49 , 50 , 51 , 52 ].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, effective recovery of HMs from contaminated water by fungi as biosorbents has also been demonstrated at small-scales [45][46][47][48]. Fungal biosorbents were extensively studied by previous researchers [46][47][48][49][50][51][52]. However, the complexity of the biosorption process, development, and cost effectiveness of adequate techniques for large-scale application await further research and deliberation prior to industrial transfer [53,54].…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal-Resistant Filamentous Fungi as Potential Mercury Bioremediators

Văcar

Covaci

Chakraborty

et al. 2021

JoF

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Filamentous fungi native to heavy metals (HMs) contaminated sites have great potential for bioremediation, yet are still often underexploited. This research aimed to assess the HMs resistance and Hg remediation capacity of fungi isolated from the rhizosphere of plants resident on highly Hg-contaminated substrate. Analysis of Hg, Pb, Cu, Zn, and Cd concentrations by X-ray spectrometry generated the ecological risk of the rhizosphere soil. A total of 32 HM-resistant fungal isolates were molecularly identified. Their resistance spectrum for the investigated elements was characterized by tolerance indices (TIs) and minimum inhibitory concentrations (MICs). Clustering analysis of TIs was coupled with isolates’ phylogeny to evaluate HMs resistance patterns. The bioremediation potential of five isolates’ live biomasses, in 100 mg/L Hg2+ aqueous solution over 48 h at 120 r/min, was quantified by atomic absorption spectrometry. New species or genera that were previously unrelated to Hg-contaminated substrates were identified. Ascomycota representatives were common, diverse, and exhibited varied HMs resistance spectra, especially towards the elements with ecological risk, in contrast to Mucoromycota-recovered isolates. HMs resistance patterns were similar within phylogenetically related clades, although isolate specific resistance occurred. Cladosporium sp., Didymella glomerata, Fusarium oxysporum, Phoma costaricensis, and Sarocladium kiliense isolates displayed very high MIC (mg/L) for Hg (140–200), in addition to Pb (1568), Cu (381), Zn (2092–2353), or Cd (337). The Hg biosorption capacity of these highly Hg-resistant species ranged from 33.8 to 54.9 mg/g dry weight, with a removal capacity from 47% to 97%. Thus, the fungi identified herein showed great potential as bioremediators for highly Hg-contaminated aqueous substrates.

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Bioremoval of Different Heavy Metals by the Resistant Fungal StrainAspergillus niger

Cited by 64 publications

References 28 publications

Fungal and metabolome diversity of the rhizosphere and endosphere of Phragmites australis in an AMD-polluted environment

Fungal and metabolome diversity of the rhizosphere and endosphere of Phragmites australis in an AMD-polluted environment

Recent Advances in Biosorption of Copper and Cobalt by Filamentous Fungi

Heavy Metal-Resistant Filamentous Fungi as Potential Mercury Bioremediators

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