what do roots do in the rhizosphere

Roots exude a variety of organic compounds into the rhizosphere that attract microbes, alter pH, and mobilize nutrients. They absorb nutrients and water more efficiently in this zone. Roots also engage in signaling with symbiotic microbes like rhizobia and mycorrhizae. They can secrete allelopathic compounds to suppress competitors or pathogens. Structural roots also influence physical soil structure through growth and pressure.