Plant symbiosis refers to the mutually beneficial relationships between plants and other organisms, such as fungi and bacteria. One common example is the association between plants and mycorrhizal fungi, where the fungi enhance nutrient absorption for the plant while receiving carbohydrates in return. This relationship helps plants thrive in nutrient-poor soils. Another type of symbiosis involves nitrogen-fixing bacteria, like those in the genus Rhizobium, which live in the root nodules of legumes. These bacteria convert atmospheric nitrogen into a form that plants can use, enriching the soil. In exchange, the plants provide the bacteria with sugars and a suitable environment to grow.