Visualization of the Mycelia of Wood-Rotting Fungi by Fluorescence in Situ Hybridization Using a Peptide Nucleic Acid Probe

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White rot fungus, Phanerochaete chrysosporium, and brown rot fungus, Postia placenta, grown on agar plates, were visualized by fluorescence in situ hybridization (FISH) using a peptide nucleic acid (PNA) probe. Mycelia grown on wood chips were also clearly detected by PNA-FISH following blocking treatment. To the best of our knowledge, this is the first report on the visualization of fungi in wood by FISH.