Is it true that Mycorrhiza is a symbiotic association between a fungus and the roots of a plant?

Mycorrhiza is a symbiotic association between a fungus and the roots of a plant. The fungus colonizes the roots of the plant, forming a mutually beneficial relationship that enhances nutrient uptake and improves plant growth. In this symbiosis, the fungus provides the plant with nutrients, such as phosphorus and nitrogen, that it obtains from the soil. In return, the plant provides the fungus with carbohydrates produced through photosynthesis. Mycorrhizae are important components of many ecosystems, and they are particularly important for the growth and health of many forest trees. They are not associated with the stem or leaves of the plant.