Describe the role of mycorrhizal fungi in plant nutrition and growth. How can mycorrhizae benefit sustainable horticulture practices?

Mycorrhizal fungi play a critical role in enhancing plant nutrition and growth through a symbiotic relationship with plant roots. This association, known as mycorrhiza, benefits both the fungi and the plants in various ways, contributing significantly to sustainable horticulture practices. Role of Mycorrhizal Fungi in Plant Nutrition and Growth: 1. Nutrient Acquisition: Mycorrhizal fungi extend their hyphae (thread-like structures) into the soil, vastly increasing the surface area for nutrient absorption compared to plant roots alone. They have a particularly high affinity for phosphorus, which is often present in low availability in soil. The fungi mobilize phosphorus and other nutrients, such as nitrogen, potassium, calcium, and micronutrients, making them more accessible to plants. 2. Water Relations: Mycorrhizal fungi improve water uptake efficiency by enhancing root surface area and improving soil structure. This is especially beneficial in drought conditions, where plants with mycorrhizal associations can maintain better water balance and stress tolerance. 3. Enhanced Disease Resistance: Some mycorrhizal f....