Deciphering bacterial community composition and function at critical interfaces of plant-arbuscular mycorrhizal fungi-bacterial holobiont.
Wang L, Zhou J, Wei W, George TS, Feng G
Mycorrhizal Networks
The invisible fungal threads laced through your vegetable garden soil are actively recruiting and organizing the bacteria that determine whether your plants get the phosphorus and nitrogen they need to thrive.
Beneath every plant is a hidden community: special underground fungi wrap around roots and send out hair-thin threads deep into the soil, ferrying sugar from the plant outward and pulling nutrients back in. Scientists discovered that these fungal threads don't just transport — they build distinct neighborhoods of bacteria at every point along their length, each with different jobs. Understanding who lives where in this underground network tells us why plants with richer soil life grow better, and how we might help crops thrive with fewer added fertilizers.
Key Findings
Three different species of arbuscular mycorrhizal fungi hosted distinct bacterial communities even when colonizing the same maize root system simultaneously.
Bacterial community composition and metabolic function (measured via Biolog-ECO plates) differed significantly across root, rhizosphere, and hyphal interface zones.
Plant-derived carbon flux was identified as a key driver organizing bacterial community structure across all holobiont interfaces.
chevron_right Technical Summary
Researchers used corn plants inoculated with three species of beneficial soil fungi to map how those fungi shape the bacteria living at different underground zones — from root surfaces to the tips of fungal threads extending into soil. The study reveals that these fungal networks create distinct bacterial communities and metabolic activities at each interface, driven by carbon flowing from the plant and nutrients flowing from the soil.
Abstract Preview
Arbuscular mycorrhizal (AM) fungi connect plant roots and soil bacteria, forming a cross-kingdom holobiont driven by plant-derived carbon flux and soil-derived nutrient flux. This holobiont encompa...
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