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The text indicates that the structure of a mycorrhizal fungus's mycelium is critical to its role in a symbiotic relatio…
Mycorrhizal fungi form a crucial symbiotic relationship with over 90% of plant species. The fungus develops a vast underground network of microscopic threads called hyphae, which collectively form the mycelium. This intricate web extends far beyond the reach of the plant’s own roots, allowing the fungus to efficiently absorb water and key mineral nutrients like phosphorus from the soil. These resources are then transported back to the plant. In exchange for these otherwise inaccessible minerals, the plant provides the fungus with energy-rich carbon compounds, such as sugars, which the plant produces via photosynthesis.