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Global diversity and distribution of mushroom-inhabiting bacteria

Daniyal Gohar1, Kadri Põldmaa1,2, Leho Tedersoo1

  • 1Institute of Ecology and Earth Sciences, University of Tartu, J. Liivi St. 2, Tartu, 50409, Estonia.

Environmental Microbiology Reports
|February 1, 2022
PubMed

Insights

A core global mushroom microbiome exists, dominated by a few bacterial genera. Host phylogeny, not climate or soil, significantly shapes these mushroom-inhabiting bacterial (MIB) communities.

Area of Science:

  • Microbiology
  • Mycology
  • Ecology

Background:

  • Mushroom-forming fungi rely on microbial symbionts for development and health.
  • Previous research on mushroom-inhabiting bacterial (MIB) communities focused on local scales, leaving global diversity and drivers unclear.

Purpose of the Study:

  • To investigate the global diversity and community composition of MIB.
  • To determine the influence of host phylogeny, climate, and soil factors on MIB communities.

Main Methods:

  • Global-scale analysis of MIB communities.
  • Comparative analysis of MIB composition against environmental and host variables.

Main Results:

  • Identified a core global mushroom microbiome (30% of reads) dominated by genera like Halomonas, Serratia, and Bacillus.
  • Host phylogeny was a significant driver of MIB community structure.
  • Climate and soil factors had negligible effects on MIB composition.

Conclusions:

  • MIB communities are shaped primarily by host evolutionary history, unlike free-living bacteria.
  • Fungal-bacterial interactions play a crucial role in structuring MIB communities.

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