The symbionts forming arbuscular mycorrhizas -- Colonization of roots and anatomy of arbuscular mycorrhizas -- Genetic, cellular and molecular interactions in the establishment of arbuscular mycorrhizas -- Growth and carbon economy of arbuscular mycorrhizal symbionts -- Mineral nutrition, toxic element accumulation and water relations of arbuscular mycorrhizal plants -- Structure and development of ectomycorrhizal roots -- Ectendo- and arbutoid mycorrhizas -- Growth and carbon allocation of ectomycorrhizal symbionts -- Nitrogen mobilization and nutrition in ectomycorrhizal plants -- Phosphorus and base cation nutrition, heavy metal accumulation and water relations of ectomycorrhizal plants -- Ericoid mycorrhizas -- Mycorrhizas of green orchids -- Mycorrhizas in achlorophyllous plants (mycoheterotrophs) -- Fungal symbioses in lower land plants -- The roles of mycorrhizas in successional processes and in selected biomes -- Mycorrhizas in ecological interactions -- Mycorrhizas in agriculture, horticulture and forestry. The roots of most plants are colonized by symbiotic fungi to form mycorrhiza, which play a critical role in the capture of nutrients from the soil and therefore in plant nutrition. Mycorrhizal Symbiosis is recognized as the definitive work in this area. Since the last edition was published there have been major advances in the field, particularly in the area of molecular biology, and the new edition has been fully revised and updated to incorporate these exciting new developments. Over 50% new material .Includes expanded colour plate section. Covers all aspects of mycorrhiza. Presents new taxonomy. Discusses the impact of proteomics and genomics on research in this area.