Truffle fungi may travel on the wind, not just in animal guts
Mycorrhizal Networks
The mushrooms and truffle-like fungi partnering with the trees in your yard or local woods have a hidden escape route through the air, which helps explain how these forest partnerships spread and adapt as landscapes change.
Truffles grow underground and scientists long assumed animals like squirrels had to dig them up and eat them to spread their spores elsewhere. This study set up air traps alongside soil samples at eight US sites and found truffle spores showing up in the air about a fifth of the time, sometimes matching soil samples found dozens of miles away. It turns out truffle spores that catch the wind tend to be smaller than average, suggesting some truffle species have quietly evolved a second way to travel.
Key Findings
Hypogeous (underground) truffle fungi made up 17.2% of EM fungal OTUs and 19.4% of sequence reads found in airborne spore trap samples across eight US sites.
Airborne truffle spores appeared in episodic bursts rather than continuously, unlike above-ground mushroom spores which showed steadier presence.
Truffle spores captured in air traps were significantly smaller on average than truffle spores remaining in soil, and matching OTUs were found in air and soil samples tens of kilometers apart.
chevron_right Technical Summary
Truffles, the underground fungi famous for being sniffed out by pigs and dogs, may also spread through the air like their mushroom cousins do, according to a study that found truffle spores drifting in wind samples tens of kilometers from where they landed in soil.
Abstract Preview
Original paper
Is aerial dispersal an overlooked pathway for ectomycorrhizal truffle fungi?
The dispersal of ectomycorrhizal (EM) fungi is typically characterized by an ecological dichotomy in which aboveground (epigeous) mushrooms disperse via wind and belowground (hypogeous) truffles di...
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