Phylogenetic analysis of manganese-oxidizing fungi isolated from manganese-rich aquatic environments in Hokkaido, Japan

Takano, Keishi; Itoh, Yoko; Ogino, Tagiru; Kurosawa, Kunihiko; Sasaki, Keiko

doi:10.1007/s10201-006-0177-x

Cited by 38 publications

(18 citation statements)

References 17 publications

(18 reference statements)

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“…Mineral surface-catalyzed Mn(II) oxidation was shown to occur in simulated CMD treatment bioreactors, although microbial activity dominated the oxidation of Mn(II) to Mn(III/IV) oxides under certain treatment conditions (2). A diversity of bacteria (10)(11)(12)(13)(14)(15) and fungi (12,(15)(16)(17)(18), isolated from a range of aquatic and terrestrial environments, are known to oxidize Mn(II) when grown in pure culture, although not as an energy-conserving process but rather as a side reaction of unknown physiological basis. The remediation of Mn-contaminated waters is thought to rely largely on such organisms.…”

mentioning

confidence: 99%

Profiling Microbial Communities in Manganese Remediation Systems Treating Coal Mine Drainage

Chaput

Hansel

Burgos

et al. 2015

Appl Environ Microbiol

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cWater discharging from abandoned coal mines can contain extremely high manganese levels. Removing this metal is an ongoing challenge. Passive Mn(II) removal beds (MRBs) contain microorganisms that oxidize soluble Mn(II) to insoluble Mn(III/IV) minerals, but system performance is unpredictable. Using amplicon pyrosequencing, we profiled the bacterial, fungal, algal, and archaeal communities in four MRBs, performing at different levels, in Pennsylvania to determine whether they differed among MRBs and from surrounding soil and to establish the relative abundance of known Mn(II) oxidizers. Archaea were not detected; PCRs with archaeal primers returned only nontarget bacterial sequences. Fungal taxonomic profiles differed starkly between sites that remove the majority of influent Mn and those that do not, with the former being dominated by Ascomycota (mostly Dothideomycetes) and the latter by Basidiomycota (almost entirely Agaricomycetes). Taxonomic profiles for the other groups did not differ significantly between MRBs, but operational taxonomic unit-based analyses showed significant clustering by MRB with all three groups (P < 0.05). Soil samples clustered separately from MRBs in all groups except fungi, whose soil samples clustered loosely with their respective MRB. Known Mn(II) oxidizers accounted for a minor proportion of bacterial sequences (up to 0.20%) but a greater proportion of fungal sequences (up to 14.78%). MRB communities are more diverse than previously thought, and more organisms may be capable of Mn(II) oxidation than are currently known.

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mentioning

confidence: 99%

Profiling Microbial Communities in Manganese Remediation Systems Treating Coal Mine Drainage

Chaput

Hansel

Burgos

et al. 2015

Appl Environ Microbiol

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“…Studies on Ascomycetes point to a high similarity between bacterial and fungal Mn(II) oxidation: both groups use multicopper oxidase-type enzymes as catalysts and layer-type Mn(IV) oxides as reaction products. The ability to oxidize Mn(II) has been demonstrated for most species of Phoma or Paraconiothyrium (Coniothyrium) isolated from stream and wetland sediments (Takano et al 2006). However, further laboratory and field studies are needed to evaluate their potential for remediation of habitats and effluents contaminated with toxic metal(loid) ions.…”

Section: Oxidation Of Mnmentioning

confidence: 99%

Fungi in lake ecosystems

Wurzbacher¹,

Bärlocher²,

Grossart³

2010

Aquat. Microb. Ecol.

199

170

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This review highlights the presence and ecological roles of fungi in lakes, and aims to stimulate research in aquatic mycology. In the study of lentic systems, this field is an almost completely neglected topic and, if considered at all, has often been restricted to specific groups of fungi, such as yeasts, filamentous fungi (e.g. aquatic hyphomycetes), or phycomycetes (an obsolete taxonomic category that included various fungal and fungal-like organisms). We document that aquatic fungi are common in various lentic habitats. They play potentially crucial roles in nutrient and carbon cycling and interact with other organisms, thereby influencing food web dynamics. The development and application of molecular methods have greatly increased the potential for unraveling the biodiversity and ecological roles of fungi in lake ecosystems. We searched the literature for reports on all fungi occurring in lake ecosystems. The present study summarizes information on the highly diverse mycoflora in lake microhabitats and highlights the main processes they influence. We also point out ecological niches of fungi in lakes that have been examined only superficially or ignored completely. We demonstrate that we now have the methodology to perform systematic studies to finally fill in some of the large gaps in this field.

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“…The 18 SrRNA and ITS1-5.8SrRNA-ITS2 genes were amplified by PCR. The primers for PCR were eight oligonucleotides from NS1 to NS8 designed by Takano et al 9) for 18SrRNA gene, and ITS5 and ITS4 described by White et al 10) in the ITS1-5.8SrRNA-ITS2 gene. The determined sequences were analyzed using the open reading frame prediction software ORF finder.…”

Section: Isolation and Identification Of Microorganismmentioning

confidence: 99%

Immobilization of Mn(II) Ions by a Mn-Oxidizing Fungus <I>Paraconiothyrium sp.-Like</I> Strain at Neutral pHs

et al. 2006

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A Mn-oxidizing fungus was isolated from a constructed wetland of Hokkaido (Japan), which is receiving the Mn-impacted drainage, and genetically and morphologically identified as Paraconiothyrium sp.-like strain. The optimum pHs were 6.45-6.64, where is more acidic than those of previously reported Mn-oxidizing fungi. Too much nutrient inhibited fungal Mn-oxidation, and too little nutrient also delayed Mn oxidation even at optimum pH. In order to achieve the oxidation of high concentrations of Mn like mine drainage containing several hundreds gÁm À3 of Mn, it is important to find the best mix ratio among the initial Mn concentrations, inoculumn size and nutrient concentration. The strain has still Mn-tolerance with more than 380 gÁm À3 of Mn, but high Mn(II) oxidation was limited by pH control and supplied nutrient amounts. The biogenic Mn deposit was poorly crystallized birnessite. The strain is an unique Mn-oxidizing fungus having a high Mn tolerance and weakly acidic tolerance, since there has been no record about the property of the strain. There is a potentiality to apply the strain to the environmental bioremediation.

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Phylogenetic analysis of manganese-oxidizing fungi isolated from manganese-rich aquatic environments in Hokkaido, Japan

Cited by 38 publications

References 17 publications

Profiling Microbial Communities in Manganese Remediation Systems Treating Coal Mine Drainage

Profiling Microbial Communities in Manganese Remediation Systems Treating Coal Mine Drainage

Fungi in lake ecosystems

Immobilization of Mn(II) Ions by a Mn-Oxidizing Fungus <I>Paraconiothyrium sp.-Like</I> Strain at Neutral pHs

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