Podcast summary
Mycorrhizal Secrets: How Fungi Power Plants
Mycorrhizal fungi matter most under low phosphorus
Arbuscular mycorrhizal fungi (AMF) are subterranean plant helpers that specialize in acquiring phosphorus in exchange for carbon; fertilizing enough phosphorus makes them functionally redundant, while disturbed soils prevent long-term symbiosis.
Plant allocation to fungi can be selective
Plants can detect which AMF provide more phosphorus and then allocate root growth and sugars accordingly; both phosphorus-acquiring performance and host carbon supply shape which fungal “partners” thrive.
Fertilization and disturbance can break symbiosis cycles fast
Long-term enrichment shifts plant communities toward fine-root weeds that feed fungi less, and tillage timing matters: tilling when fungi are in hyphal growth can reduce them, while winter tillage may spare spores.
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