Scientists used powerful X-rays to photograph living fungal networks inside undisturbed soil
Braunmiller HM, Bitterlich M, Koebernick N, Jacob E, Heck AS
Mycorrhizal Networks
Every tomato, squash, or native wildflower in your garden is likely plugged into an underground fungal web that stretches its reach far beyond its own roots, and now scientists can finally watch that web in action without digging it up.
Most plants team up with soil fungi that grow tiny threads through the dirt, acting like extra roots to pull in water and minerals the plant can't reach on its own. Until now, scientists had to dig up and destroy the soil to study these threads, which made it hard to see how they actually work. This study used the same kind of X-ray technology used in hospitals, but far more powerful, to take detailed 3D pictures of the fungal threads inside real, intact soil, letting researchers measure their length, branching, and how much space they occupy without disturbing a single grain.
Key Findings
Synchrotron micro-CT imaging successfully visualized arbuscular mycorrhizal fungal hyphae inside intact, undisturbed soil across two different soil textures without any physical disruption.
A quantitative 3D pipeline was developed to measure hyphal length, branching frequency, volume, surface area, and pore-space occupancy at the microscale.
The method also allows measurement of the contact area between fungal structures and both soil aggregates and plant roots, enabling direct linkage to nutrient and water transport models.
chevron_right Technical Summary
Researchers used high-powered X-ray scanning to see, for the first time, the living fungal networks wrapped around plant roots inside undisturbed soil. They built a workflow to measure how these networks branch, grow, and occupy pore spaces, opening the door to understanding exactly how fungi ferry water and nutrients to plants.
Abstract Preview
Original paper
Opening the black box: in situ imaging of arbuscular mycorrhizal fungal structures in soil using synchrotron-based micro-CT.
Arbuscular mycorrhizal fungi (AMF) contribute to plant nutrient and water uptake via their extraradical hyphal networks. However, in situ methodologies to quantify architectural and morphological t...
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