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  4. Nitrogen fertiliser rate affects the frequency of nitrate-dissimilating <i>Pseudomonas</i> spp. in the rhizosphere of <i>Lolium perenne</i> grown under elevated pCO<sub>2</sub> (Swiss FACE)
 
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Nitrogen fertiliser rate affects the frequency of nitrate-dissimilating <i>Pseudomonas</i> spp. in the rhizosphere of <i>Lolium perenne</i> grown under elevated pCO<sub>2</sub> (Swiss FACE)

Auteur(s)
Fromin, Nathalie
Editeur(s)
Tarnawski, Sonia Estelle
Roussel-Delif, L.
Hamelin, Jérôme
Baggs, E.M.
Aragno, Michel 
Institut de biologie 
Date de parution
2005
In
Soil Biology and Biochemistry, 2005/37/1962-1965
Mots-clés
  • N availability

  • Nitrate dissimilation...

  • <i>Pseudomonas</i>

  • Rhizosphere

  • Perennial grass

  • Rhizosphere

  • Elevated atmospheric ...

Résumé
The effect of elevated pCO<sub>2</sub> (60 Pa) on the frequency of nitrate-dissimilating <i>Pseudomonas</i> (NDP) was investigated in the rhizosphere of fertilised <i>Lolium perenne</i> swards in the Swiss Free Air Carbon dioxide Enrichment (FACE) experiment. Numbers of cultivable root-associated <i>Pseudomonas</i> were greater under elevated (60 Pa) than under ambient (36 Pa) pCO<sub>2</sub> in both high and low N-fertilised swards. For both pCO<sub>2</sub> conditions, the NDP frequency decreased with closer root proximity to <i>L. perenne</i> roots in low fertilised swards. Anyway, in high N swards the NDP frequency was similar in root and soil fractions. Thus, N availability may be a major factor influencing NDP populations under elevated pCO<sub>2</sub>, most likely due to increased competition for N between plant and nitrate-dissimilating bacteria.
URI
https://libra.unine.ch/handle/123456789/18693
DOI
10.1016/j.soilbio.2005.02.003
Autre version
http://dx.doi.org/10.1016/j.soilbio.2005.02.003
Type de publication
Resource Types::text::journal::journal article
Dossier(s) à télécharger
 main article: Fromin_N._-_Nitrogen_fertiliser_rate_ELSEVIER_20060621.pdf (342.43 KB)
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