Mycorrhizal fungi play a crucial role in the acquisition of mineral nutrients by host plants, with three main types: ectomycorrhizas (ECM), ericoid mycorrhizas (EM), and vesicular-arbuscular mycorrhizas (VAM). Mycorrhizal infection can enhance plant growth directly by improving nutrient uptake through fungal hyphae or indirectly by altering transpiration rates and rhizosphere microflora. External hyphae of VAM fungi have been shown to uptake and deliver nutrients such as P, N, K, Ca, SO4^2-, Cu, Zn, and Fe to the plant. In experimental chambers, VAM hyphae can deliver up to 80% of plant P, 25% of plant N, 10% of plant K, 25% of plant Zn, and 60% of plant Cu. However, the role of mycorrhizas in nutrient uptake other than P and N is limited, especially for ECM. ECM and VAM fungi can contribute to Mg, B, and Fe nutrition, but this has not been substantiated. ECM and EM fungi produce ectoenzymes that allow host plants to access organic N and P forms unavailable to VAM fungi or non-mycorrhizal roots. Further research is needed to quantify nutrient uptake and transport by fungal hyphae in soil and regulation at the fungal-plant interface to support the commercial use of mycorrhizal fungi. Mycorrhizal infection enhances plant growth by increasing nutrient uptake, but requires a cost in terms of photosynthates. The impact of this cost on host plant growth depends on soil and environmental factors and the ability of the fungus to compensate for root functions in nutrient and water uptake. Differences exist between ECM, EM, and VAM in terms of fungal structure and nutrient uptake mechanisms. VAM fungi are obligatorily dependent on host plant carbon for energy, limiting the evaluation of their nutrient uptake capacity. In VAM symbiosis, growth of both partners is influenced by host plant genotype, VAM species, and soil, but not necessarily by soil fertility or root infection level.Mycorrhizal fungi play a crucial role in the acquisition of mineral nutrients by host plants, with three main types: ectomycorrhizas (ECM), ericoid mycorrhizas (EM), and vesicular-arbuscular mycorrhizas (VAM). Mycorrhizal infection can enhance plant growth directly by improving nutrient uptake through fungal hyphae or indirectly by altering transpiration rates and rhizosphere microflora. External hyphae of VAM fungi have been shown to uptake and deliver nutrients such as P, N, K, Ca, SO4^2-, Cu, Zn, and Fe to the plant. In experimental chambers, VAM hyphae can deliver up to 80% of plant P, 25% of plant N, 10% of plant K, 25% of plant Zn, and 60% of plant Cu. However, the role of mycorrhizas in nutrient uptake other than P and N is limited, especially for ECM. ECM and VAM fungi can contribute to Mg, B, and Fe nutrition, but this has not been substantiated. ECM and EM fungi produce ectoenzymes that allow host plants to access organic N and P forms unavailable to VAM fungi or non-mycorrhizal roots. Further research is needed to quantify nutrient uptake and transport by fungal hyphae in soil and regulation at the fungal-plant interface to support the commercial use of mycorrhizal fungi. Mycorrhizal infection enhances plant growth by increasing nutrient uptake, but requires a cost in terms of photosynthates. The impact of this cost on host plant growth depends on soil and environmental factors and the ability of the fungus to compensate for root functions in nutrient and water uptake. Differences exist between ECM, EM, and VAM in terms of fungal structure and nutrient uptake mechanisms. VAM fungi are obligatorily dependent on host plant carbon for energy, limiting the evaluation of their nutrient uptake capacity. In VAM symbiosis, growth of both partners is influenced by host plant genotype, VAM species, and soil, but not necessarily by soil fertility or root infection level.