The Rhizosphere: Biochemistry and Organic Substances at the Soil-Plant Interface - Paperbackby Roberto Pinton (Editor), Zeno Varanini (Editor), Paolo Nannipieri (Editor) In the rhizosphere, exudates from plants and microorganisms as well as stable soil organic matter influence processes that can control plant growth, microbial infections, and nutrient uptake. As the chemistry and biochemistry of these substances becomes more and more clear, their study promises to shed light on the complex interactions between plant and soil microflora.