Root anatomy governs bi-directional resource transfer in mycorrhizal symbiosis
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Researchers developed a new theory explaining how plant roots and fungi work together to exchange nutrients and carbon. The theory shows that thicker roots are less efficient at absorbing nutrients on their own, but mycorrhizal fungi help by positioning themselves in the inner layers of roots to reduce the energy cost of nutrient transport. This partnership between roots and fungi becomes increasingly important for thicker roots, explaining why many plants with thick roots depend more heavily on fungal partners for survival.