Nitrogen fertiliser rate affects the frequency of nitrate-dissimilating Pseudomonas spp. in the rhizosphere of Lolium perenne grown under elevated pCO2 (Swiss FACE)

Fromin, Nathalie

doi:10.1016/j.soilbio.2005.02.003

Nitrogen fertiliser rate affects the frequency of nitrate-dissimilating Pseudomonas spp. in the rhizosphere of Lolium perenne grown under elevated pCO2 (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

Résumé

The effect of elevated pCO2 (60 Pa) on the frequency of nitrate-dissimilating Pseudomonas (NDP) was investigated in the rhizosphere of fertilised Lolium perenne swards in the Swiss Free Air Carbon dioxide Enrichment (FACE) experiment. Numbers of cultivable root-associated Pseudomonas were greater under elevated (60 Pa) than under ambient (36 Pa) pCO2 in both high and low N-fertilised swards. For both pCO2 conditions, the NDP frequency decreased with closer root proximity to L. perenne 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 pCO2, 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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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)