Fungal Hyphosphere Microbiomes Are Distinct from Surrounding Substrates and Show Consistent Association Patterns

Area of Science:

• Soil microbiology
• Mycology
• Bacteriology

Background:

• Mat-forming fungi are prevalent in global soils, shaping ecological processes through their extensive hyphae.
• Fungal hyphae create unique microenvironments, influencing the selection of associated bacteria, termed mycophilic bacteria.

Purpose of the Study:

• To compare bacterial communities associated with fungal mats of Leucopaxillus gentianeus and Leucopaxillus albissimus to adjacent nonmat soils.
• To identify core bacterial genera consistently found within fungal mats and assess their ecological significance.

Main Methods:

• Comparative analysis of bacterial communities from fungal mats and surrounding soil substrates.
• Identification and quantification of bacterial genera using molecular techniques (implied).

Main Results:

• Bacterial richness and diversity were significantly reduced within fungal mats.
• Bacterial community composition differed significantly between mat and nonmat environments.
• Genera such as Burkholderia, Streptomyces, Bacillus, Paenibacillus, and Mycobacterium were significantly abundant in fungal mats, indicating a core mycophilic bacterial guild.

Conclusions:

• Fungal mats harbor distinct bacterial communities, characterized by reduced diversity and a prevalence of specific genera.
• The consistent presence of these genera across different fungal mats supports the concept of a specialized mycophilic bacterial guild.
• Understanding these fungal-bacterial interactions is crucial for soil nutrient cycling, plant productivity, and potentially human health.