What is the role of mycorrhizae in plant growth?

Mycorrhizae play a crucial role in plant growth by enhancing nutrient uptake through symbiotic relationships with plant roots. In this mutualistic association, mycorrhizal fungi extend their hyphae into the soil, increasing the surface area available for absorption. This expanded network allows plants to access essential nutrients, particularly phosphorus, nitrogen, and micronutrients, which may be limited in the soil. Additionally, mycorrhizae can improve water absorption, helping plants during periods of drought. This symbiotic relationship not only supports the nutritional needs of plants but also promotes overall plant health and growth.

The other options do not accurately reflect the primary role of mycorrhizae. While water storage, soil erosion prevention, and leaf size may be influenced by various factors in plant growth, they are not direct functions of mycorrhizal fungi. Mycorrhizae are specifically known for their enhancement of nutrient and water uptake through their interaction with plant roots.