Soil antimony pollution and plant growth stage affect the biodiversity of auxin-producing bacteria isolated from the rhizosphere of Achillea ageratum L

A total of 4512 rhizobacteria were isolated at three stages of plant growth from Achillea ageratum colonizing a polluted site with an antimony concentration gradient. For 222 of these isolates auxin production ( aux +) was verified in vitro. The percentage of aux + isolates increased with soil antim...

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Bibliographic Details
Published in:FEMS microbiology ecology 2003-10, Vol.46 (1), p.73-80
Main Authors: Picard, Christine, Bosco, Marco
Format: Article
Language:eng
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Summary:A total of 4512 rhizobacteria were isolated at three stages of plant growth from Achillea ageratum colonizing a polluted site with an antimony concentration gradient. For 222 of these isolates auxin production ( aux +) was verified in vitro. The percentage of aux + isolates increased with soil antimony concentration, as well as with plant growth stage. An amplified rDNA restriction analysis clustered the aux + isolates into 51 clusters, one of which was numerically predominant and present throughout plant development and at all antimony concentrations. The aux + population was genetically very diverse, and this diversity was related to both antimony concentration and plant growth stage.
ISSN:0168-6496
1574-6941