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Cyanobacterial symbioses are no longer regarded as mere oddities but as important components of the biosphere, occurring both in terrestrial and aquatic habitats worldwide. It is becoming apparent that they can enter into symbiosis with a wider variety of organisms than hitherto known, and there are many more still to be discovered, particularly in marine environments. The chapters cover cyanobacterial symbioses with plants (algae, bryophytes, Azolla, cycads, Gunnera), cyanobacterial symbioses in marine environments, lichens, Nostoc-Geosiphon (a fungus closely related to arbuscular mycorrhiza fungi) symbiosis, and artificial associations of cyanobacteria with economically important plants. In addition, cyanobiont diversity, sensing-signalling, and evolutionary aspects of the symbiosis are dealt with. Renowned experts actively involved in research on cyanobacterial symbioses deal with ecological, physiological, biochemical, molecular, and applied aspects of all known cyanobacterial symbioses.
This volume on cyanobacteria in symbiosis complements the two earlier volumes on cyanobacteria published by Kluwer ( Molecular Biology of Cyanobacteria , edited by D.A. Bryant and Ecology of Cyanobacteria , edited by B.A. Whitton and M. Potts). Together, the three volumes provide the most comprehensive treatment of cyanobacterial literature as a whole. The book will serve as a valuable reference work and text for teaching and research in the field of plant-microbe interactions and nitrogen fixation.

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Introduction. Colour Plates. 1. Cyanobacteria in Symbiosis with Diatoms; S. Janson. 2. Marine Cyanobacterial Symbioses; E.J. Carpenter, R.A. Foster. 3. The Nostoc-Geosiphon Endocytobiosis; M. Kluge, et al. 4. Cyanolichens: An Evolutionary Overview; J. Rikkinen. 5. Cyanolichens: Carbon Metabolism; K. Palmqvist. 6. Cyanolichens: Nitrogen Metabolism; A.N. Rai. 7. Cyanobacteria in Symbiosis with Hornworts and Liverworts; D.G. Adams. 8. Associations Between Cyanobacteria and Mosses; B. Solheim, M. Zielke. 9. Azolla-Anabaena Symbiosis; S. Lechno-Yossef, S.A. Nierzwicki-Bauer. 10. Applied Aspects of Azolla-Anabaena Symbiosis; C. van Hove, A. Lejeune. 11. Cyanobacteria in Symbiosis with Cycads; J.-L. Costa, P. Lindblad. 12. Nostoc-Gunnera Symbiosis; B. Bergman. 13. Ecology of Nostoc-Gunnera Symbiosis; B.A. Osborne, J.I. Sprent. 14. Artificial Cyanobacterium-Plant Symbioses; M.V. Gusev, et al. 14. Artificial Cyanobacterium-Plant Symbioses; M.V. Gusev, et al. 15. Cyanobacterial Diversity and Specificity in Plant Symbioses; U. Rasmussen, M. Nilsson. 16. Evolution of Cyanobacterial Symbioses; J.A. Raven. Subject Index.

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