Fungal transformation of selenium and tellurium located in a volcanogenic sulfide deposit

Xinjin Liang, Magali Aude Marie-Jeanne Perez, Shuai Zhang, Wenjuan Song, Joseph Graham Armstrong, Liam Adam Bullock, Jörg Feldmann, John Parnell, Laszlo Csetenyi, Geoffrey Michael Gadd* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Microbial reduction of soluble selenium (Se) or tellurium (Te) species results in immobilization as elemental forms and this process has been employed in soil bioremediation. However little is known of direct and indirect fungal interactions with Se/Te-bearing ores. In this research, the ability of Phoma glomerata to effect transformation of selenite and tellurite was investigated including interaction with Se and Te present in sulfide ores from the Kisgruva Proterozoic volcanogenic deposit. P. glomerata could precipitate elemental Se and Te as nanoparticles, intracellularly and extracellularly, when grown with selenite or tellurite. The nanoparticles possessed various surface capping molecules, with formation being influenced by extracellular polymeric substances. The presence of sulfide ore also affected production of exopolysaccharide and protein. Although differences were undetectable in gross Se and Te ore levels before and after fungal interaction using X-ray fluorescence, laser ablation inductively-coupled plasma mass spectrometry of polished flat ore surfaces revealed that P. glomerata could effect changes in Se/Te distribution and concentration indicating Se/Te enrichment in the biomass. These findings provide further understanding of fungal roles in metalloid transformations, and are relevant to the geomicrobiology of environmental metalloid cycling as well as informing applied approaches for Se and Te immobilization, biorecovery or bioremediation. This article is protected by copyright. All rights reserved.

Original languageEnglish
Pages (from-to)2346-2364
Number of pages19
JournalEnvironmental Microbiology
Volume22
Issue number6
Early online date20 Apr 2020
DOIs
Publication statusPublished - Jun 2020

Keywords

  • selenium
  • tellurium
  • nanoparticles
  • fungi
  • bioreduction
  • bioprecipitation
  • EXTRACELLULAR POLYMERIC SUBSTANCES
  • TOLERANCE
  • SILVER NANOPARTICLES
  • BIOTRANSFORMATION
  • METALS
  • REDUCTION
  • WASTE-WATER
  • BIOREMEDIATION
  • ELEMENTAL SELENIUM
  • WHITE-ROT FUNGUS

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