chapter 1 Types, Amounts, and Possible Functions of Compounds Released into the Rhizosphere by Soil-Grown Plants -- chapter 2 The Release of Root Exudates as Affected by the Plant Physiological Status -- chapter 3 Rhizodeposition and Microbial Populations -- chapter 4 Nutrient Transformations in the Rhizosphere -- chapter 5 Nutrients as Regulators of Root Morphology and Architecture -- chapter 6 Root Membrane Activities Relevant to Nutrient Acquisition at the Plant–Soil Interface -- chapter 7 Function of Siderophores in the Plant Rhizosphere -- chapter 8 Mycorrhizal Fungi: A Fungal Community at the Interface between Soil and Roots -- chapter 9 Molecular Biology and Ecology of the Rhizobia-Legume Symbiosis -- chapter 10 Biocontrol of Plant Pathogens: Principles, Promises, and Pitfalls -- chapter 11 Chemical Signals in the Rhizosphere: Root–Root and Root–Microbe Communication -- chapter 12 Modeling the Rhizosphere -- chapter 13 Methodological Approaches to the Study of Carbon Flow and the Associated Microbial Population Dynamics in the Rhizosphere -- chapter 14 Gene Flow in the Rhizosphere.