Timing of resource addition affects the migration behavior of wood decomposer fungal mycelia

Yu Fukasawa, Koji Kaga

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Studies of fungal behavior are essential for a better understanding of fungal-driven ecological processes. Here, we evaluated the effects of timing of resource (bait) addition on the behavior of fungal mycelia when it remains in the inoculum and when it migrates from it towards a bait, using cord-forming basidiomycetes. Experiments allowed mycelium to grow from an inoculum wood across the surface of a soil microcosm, where it encountered a new wood bait 14 or 98 d after the start of growth. After the 42-d colonization of the bait, inoculum and bait were individually moved to a dish containing fresh soil to determine whether the mycelia were able to grow out. When the inoculum and bait of mycelia baited after 14 d were transferred to new soil, there was 100% regrowth from both inoculum and bait in Pholiota brunnescens and Phanerochaete velutina, indicating that no migration occurred. However, when mycelium was baited after 98 d, 3 and 4 out of 10 replicates of P. brunnescens and P. velutina, respectively, regrew only from bait and not from inoculum, indicating migration. These results suggest that prolonged periods without new resources alter the behavior of mycelium, probably due to the exhaustion of resources.

    Original languageEnglish
    Article number654
    JournalJournal of Fungi
    Volume7
    Issue number8
    DOIs
    Publication statusPublished - 2021 Aug

    Keywords

    • Directional memory
    • Fungal behavior
    • Microbial intelligence
    • Mycelial network
    • Wood decay fungi

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics
    • Plant Science
    • Microbiology (medical)

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