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Genetic diversity among Frankia isolated from Casuarina nodules

SYLVIE NAZARET, PASCAL SIMONET, PHILIPPE NORMAND and RENE BARDIN
Plant and Soil
Vol. 118, No. 1/2, Selected papers from the SEVENTH INTERNATIONAL CONFERENCE ON FRANKIA AND ACTINORHIZAL PLANTS (August 1989), pp. 241-247
Published by: Springer
Stable URL: http://www.jstor.org/stable/42938240
Page Count: 7
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Genetic diversity among Frankia isolated from Casuarina nodules
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Abstract

The nodulation ability of various Frankia strains isolated from the nodules of Casuarina were tested on two Casuarina species (C. equisetifolia and C. glauca), and on Hippophaë rhamnoides. We found that the isolates could be separated into two groups, some of them being unable to reinfect the Casuarina host-plant but infective on H. rhamnoides. Other isolates effectively nodulated the original Casuarina host-plant. The second purpose of this study was to examine the genetic diversity among the Casuarina-isolated strains using well-characterized symbiotic genes as hybridization probes. We found a relationship between nodulation characteristics and hybridization patterns.

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