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Hypotheses for the evolution of actinorhizal symbioses

  • Beth C. Mullin
  • Susan M. Swensen
  • Paula Goetting-Minesky

Abstract

Actinorhizal symbioses include symbiotic associations between actinomycetes of the genus Frankia and host plants belonging to 24 genera distributed among eight higher plant families. Although all host plant species are woody dicots, there is no close phylogenetic affinity among most host plant groups. Nor is there agreement among actinorhizal biologists as to whether host plants are likely to have evolved from a common nodulated ancestor or whether symbioses have more likely arisen independently more than once resulting in the current diversity of host plant species. Knowledge of the phylogenetic relationships among actinorhizal plants as well as comparative analyses of nodule structure and function should contribute to the formulation of working hypotheses for the evolution of actinorhizal symbioses.

Keywords

Host Plant Species Frankia Strain Actinorhizal Plant Root Hair Infection Tricolpate Pollen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Routledge, Chapman & Hall, Inc. 1990

Authors and Affiliations

  • Beth C. Mullin
    • 1
  • Susan M. Swensen
    • 1
  • Paula Goetting-Minesky
    • 1
  1. 1.Department of Botany, Plant Physiology and Genetics Life Sciences Graduate Program and the Center for Legume ResearchThe University of TennesseeKnoxvilleUSA

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