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Keywords:

  • ectomycorrhizal (ECM) fungi;
  • laccase;
  • polyphenol oxidase;
  • gene expression;
  • Piloderma

Summary

  • •  
    Ectomycorrhizal (ECM) fungi were screened for laccase-like genes by polymerase chain reaction (PCR) using primers for white rot fungal laccase genes, and expression of the genes was examined by reverse transcriptase polymerase chain reaction (RT-PCR) for Piloderma byssinum in axenic culture under different nutrient conditions.
  • •  
    Laccase-like genes were present in Rhizopogon roseolus along with several Russulales and Atheliaceae taxa, and showed strong nucleotide sequence similarity to laccase genes in white rot fungi. Multiple laccase-like genes were only identified in Piloderma spp.
  • •  
    Laccase-like genes were expressed in Piloderma spp., with transcript levels some six times higher under high nitrogen conditions in P. byssinum than when nitrogen availability was lower.
  • •  
    The potential roles of laccases in nutrient mobilization and/or differentiation of multihyphal ECM fungal structures are discussed.