© 2008

Nitrogen-fixing Actinorhizal Symbioses

  • Katharina Pawlowski
  • William E. Newton

Part of the Nitrogen Fixation: Origins, Applications, and Research Progress book series (NITR, volume 6)

Table of contents

  1. Front Matter
    Pages I-XVII
  2. C.T. Wheeler, A.D.L Akkermans, A.M. Berry
    Pages 1-24
  3. M. Valdés
    Pages 49-71
  4. S. M. Swensen, D. R. Benson
    Pages 73-104
  5. W. B. Silvester, R. H. Berg, C. R. Schwintzer, J. D. Tjepkema
    Pages 105-146
  6. C. Valverde, K. Huss-Danell
    Pages 167-198
  7. J. O. Dawson
    Pages 199-234
  8. L. Laplaze, S. Svistoonoff, C. Santi, F. Auguy, C. Franche, D. Bogusz
    Pages 235-259
  9. K. Pawlowski, J. I. Sprent
    Pages 261-288
  10. Back Matter
    Pages 305-310

About this book


This book is the self-contained sixth volume of a comprehensive series on nitrogen fixation. It presents the state-of-the-art in regards to actinorhizal symbioses. Like legumes, actinorhizal plants form root nodules that host nitrogen-fixing soil bacteria. However, because the macrosymbionts are, with one exception, woody plants rather than crop plants, actinorhizal symbioses are less well-known than legume symbioses to which they are phylogenetically related. Actinorhizal plants come from eight different families. They can grow on marginal soils by virtue of these symbioses and are used extensively in reforestation, soil reclamation, and desert agroforestry. The diversity of the involved host plants poses a variety of challenges to the actinorhizal symbiosis and results in interesting strategies, for example, to cope with the O2 dilemma or nutrient exchange between plant and bacterium. The actinorhizal micro-symbionts are Gram-positive actinomycetes of the genus Frankia. The inability to culture several actinorhizal microsymbionts has led to the development of diverse molecular strategies for strain identification. This volume includes chapters that deal with all these aspects of the symbiosis and both symbionts plus their ecological role and use. Other chapters tackle the global distribution of different actinorhizal plants and their microsymbionts and how this impacts the question of co-evolution of the micro- and macrosymbionts as well as comparing the actinorhizal and leguminous symbioses. No other book provides the up-to-date and in-depth coverage of this volume, which is intended to serve as an indispensable reference work for academic, governmental, and industrial scientists working in this area, to introduce students to the global importance of this association, and to provide science administrators with ready access to vital relevant information.


AgroMicro Assimilat Colon Evolution Regulation Symbiose metabolism nitrogen systematics

Editors and affiliations

  • Katharina Pawlowski
    • 1
  • William E. Newton
    • 2
  1. 1.Stockholm UniversitySweden
  2. 2.Virginia Polytechnic Institute and State UniversityBlacksburgUSA

Bibliographic information