Impact of inoculation with the phytostimulatory PGPR Azospirillum lipoferum CRT1 on the genetic structure of the rhizobacterial community of field-grown maize |
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Authors: | Ezé kiel Baudoin,Sylvie Nazaret,Christophe Mougel,Yvan Moë nne-Loccoz |
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Affiliation: | a Université de Lyon, F-69622, Lyon, France b Université Lyon 1, Villeurbanne, France c CNRS, UMR 5557, Ecologie Microbienne, Villeurbanne, France d UMR Microbiologie du Sol et de l'Environnement, INRA/Université de Bourgogne, F-21065 Dijon Cedex, France |
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Abstract: | The phytostimulatory PGPR Azospirillum lipoferum CRT1 was inoculated to maize seeds and the impact on the genetic structure of the rhizobacterial community in the field was determined during maize growth by Automated Ribosomal Intergenic Spacer Analysis (ARISA) of rhizosphere DNA extracts. ARISA fingerprints could differ from one plant to the next as well as from one sampling to the next. Inoculation with strain CRT1 enhanced plant-to-plant variability of the ARISA fingerprints and caused a statistically significant shift in the composition of the indigenous rhizobacterial community at the first two samplings. This is the first study on the ecological impact of Azospirillum inoculation on resident bacteria done in the field and showing that this impact can last at least one month. |
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Keywords: | Azospirillum Rhizosphere ARISA Fingerprint Bacterial community Impact |
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