ibclogo XVI International Botanical Congess

Abstract Number: 3493
Session = 16.10.1


FROM ROOTS TO ACTINORHIZAL ROOT NODULES


Alison M. Berry*(1), Katharina Pawlowski(2), Patricia A. Okubara(3), Terence M. Murphy(1), Karin R. Jacobsen(1). 1. University of California, Davis, CA, U.S.A., 2. Albrecht-von-Haller Institute, Goethingen, Germany, 3. USDA-ARS, Western Regional Research Center, Albany CA, U.S.A


The capacity to form nitrogen-fixing nodule symbioses is shared within a phylogenetically distinct clade of Angiosperm families that includes both Rhizobium-nodulated hosts and actinorhizal, or Frankia-nodulated, plants. Actinorhizal root nodules develop from lateral root primordia. Subsequent root cell and tissue organization is modified by symbiotic association with the nitrogen-fixing prokaryote, Frankia. The structure and function of root nodules as nitrogen assimilatory organs will be explored in relation to patterns of nodule gene expression.

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