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Plant and Soil

, Volume 120, Issue 2, pp 187–193 | Cite as

A comparison of two methods and different media for isolatingFrankia from Casuarina root nodules

  • P. A. Rosbrook
  • A. J. P. Burggraaf
  • P. Reddell
Article

Abstract

Four species of Casuarina were raised in the glasshouse and inoculated with nodules collected from nine different geographical areas within Australia. Isolations ofFrankia were attempted from 10 of the Casuarina-Frankia nodule combinations using two methods, a nodule dissection and a filtration method. With both techniquesFrankia isolates were obtained from four of the 10Frankia sources. Spores were not observed in sections of nodules from the four sources from whichFrankia was isolated, whereas spores were observed in the remaining six nodule sources. For selected nodule sources a range of isolation media were tried, but no improvement in the isolation success rate was achieved.

The effect of host species on ease of isolation was studied. The results obtained suggested it was theFrankia strain and not the host plant species which determined the ease of isolation from Casuarina nodules.

Key words

actinorhizae Casuarina Frankia isolation nitrogen fixation spores 

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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • P. A. Rosbrook
    • 1
  • A. J. P. Burggraaf
    • 2
  • P. Reddell
    • 1
  1. 1.Division of Soils, Davies LaboratoryCSIROTownsvilleAustralia
  2. 2.PhytotecLouvain-La-NeuveBelgium

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