Dataset Information

Manganese (II) removal from aqueous solutions by Cladosporium halotolerans and Hypocrea jecorina.

ABSTRACT: Manganese (Mn) is toxic at higher concentrations requiring its removal before returning the wastewater to the environment. This article reported the Mn removal of two fungi strains isolated from mine wastewater. ITS rRNA region sequencing identified the fungi strains as Cladosporium halotolerans and Hypocrea jecorina.?Mn2+ removal assays were performed in Sabouraud broth with 50?mg?L-1?Mn2+ supplemented and bioleaching assays using MnO2 instead of MnSO4 at the same conditions. C. halotolerans removed 96 % of 50?mg?L-1?Mn2+ at two weeks without MnO2 bioleaching with 649.9?mg of biomass and H. jecorina removed about 50 % of Mn2+ in 21 days from initial 50?mg of Mn2+ L-1 with 316.8?mg of biomass. Extracellular laccases were present in C. halotolerans agar regardless of the Mn addition. Mn adsorbed was detected on C. halotolerans hyphae. Mn oxidation was positive to H. jecorina by reaction of its medium with Leucoberbelin blue.

SUBMITTER: Mota EA

PROVIDER: S-EPMC7013165 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Manganese (II) removal from aqueous solutions by Cladosporium halotolerans and Hypocrea jecorina.

Mota Ester Alves EA Felestrino Érica Barbosa ÉB Leão Versiane Albis VA Guerra-Sá Renata R

Biotechnology reports (Amsterdam, Netherlands) 20200204

Manganese (Mn) is toxic at higher concentrations requiring its removal before returning the wastewater to the environment. This article reported the Mn removal of two fungi strains isolated from mine wastewater. ITS rRNA region sequencing identified the fungi strains as Cladosporium halotolerans and Hypocrea jecorina. Mn2+ removal assays were performed in Sabouraud broth with 50 mg L-1 Mn2+ supplemented and bioleaching assays using MnO2 i ...[more]

PMID: 32071895

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Project description:BackgroundThe ascomycete Hypocrea jecorina (anamorph Trichoderma reesei) is one of the most prolific producers of biomass-degrading enzymes and frequently termed an industrial workhorse. To compete for nutrients in its habitat despite its shortcoming in certain degradative enzymes, efficient perception and interpretation of environmental signals is indispensable. A better understanding of these signals as well as their transmission machinery can provide sources for improvement of biotechnological processes.ResultsThe genome of H. jecorina was analysed for the presence and composition of common signal transduction pathways including heterotrimeric G-protein cascades, cAMP signaling, mitogen activated protein kinases, two component phosphorelay systems, proteins involved in circadian rhythmicity and light response, calcium signaling and the superfamily of Ras small GTPases. The results of this survey are discussed in the context of current knowledge in order to assess putative functions as well as potential impact of alterations of the respective pathways.ConclusionImportant findings include an additional, bacterial type phospholipase C protein and an additional 6-4 photolyase. Moreover the presence of 4 RGS-(Regulator of G-protein Signaling) proteins and 3 GprK-type G-protein coupled receptors comprising an RGS-domain suggest a more complex posttranslational regulation of G-protein signaling than in other ascomycetes. Also the finding, that H. jecorina, unlike yeast possesses class I phosducins which are involved in phototransduction in mammals warrants further investigation. An alteration in the regulation of circadian rhythmicity may be deduced from the extension of both the class I and II of casein kinases, homologues of which are implicated in phosphorylation of FRQ in Neurospora crassa. On the other hand, a shortage in the number of the pathogenicity related PTH11-type G-protein coupled receptors (GPCRs) as well as a lack of microbial opsins was detected. Considering its efficient enzyme system for breakdown of cellulosic materials, it came as a surprise that H. jecorina does not possess a carbon sensing GPCR.

Dataset Information

Manganese (II) removal from aqueous solutions by Cladosporium halotolerans and Hypocrea jecorina.

Publications

Manganese (II) removal from aqueous solutions by <i>Cladosporium halotolerans</i> and <i>Hypocrea jecorina</i>.

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