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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Published in: | FEMS microbiology ecology 2003-10, Vol.46 (1), p.73-80 |
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Main Authors: | , |
Format: | Article |
Language: | eng |
Subjects: | |
Online Access: | Get full text |
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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. |
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ISSN: | 0168-6496 1574-6941 |