Toxic interactions of metal ions (Cd2+, Pb2+, Zn2+ and Sb3-) on in vitro biomass production of ectomycorrhizal fungi

E Hartley, J W G Cairney, F E Sanders, A A Meharg

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Abstract

A number of ectomycorrhizal (ECM) fungi, from sites uncontaminated by toxic metals, were investigated to determine their sensitivity to Cd2+, Pb2+, Zn2+ and Sb3-, measured as an inhibition of fungal biomass production. Isolates were grown in liquid media amended with the metals, individually (over a range of concentrations) and in combination (at single concentrations) to determine any significant interactions between the metals. Significant interspecific variation in sensitivity to Cd2+ and Zn2+ was recorded, while Pb2+ and Sb3- individually had little effect. The presence of Pb2+ and Sb3- in the media did however, ameliorate Cd2+ and Zn2+ toxicity in some circumstances. Interactions between Cd2+ and Zn2+ were investigated further over a range of concentrations. Zn2+ was found to significantly ameliorate the toxicity of Cd2+ to three of the four isolates tested. The influence of Zn2+ varied between ECM species and with the concentrations of metals tested.

Original languageEnglish
Pages (from-to)551-562
Number of pages12
JournalNew Phytologist
Volume137
Issue number3
Publication statusPublished - Nov 1997

Keywords

  • ectomycorrhizal fungi
  • toxic metals
  • interactions
  • metal tolerance
  • HOLCUS-LANATUS L
  • PISOLITHUS-TINCTORIUS
  • AXENIC GROWTH
  • CADMIUM
  • ZINC
  • COPPER
  • TOLERANCE
  • SYSTEM
  • NICKEL

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