Titre
Conservation tillage and organic farming induce minor variations in Pseudomonas abundance, their antimicrobial function and soil disease resistance.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Dennert, F.
Auteure/Auteur
Imperiali, N.
Auteure/Auteur
Staub, C.
Auteure/Auteur
Schneider, J.
Auteure/Auteur
Laessle, T.
Auteure/Auteur
Zhang, T.
Auteure/Auteur
Wittwer, R.
Auteure/Auteur
van der Heijden, MGA
Auteure/Auteur
Smits, THM
Auteure/Auteur
Schlaeppi, K.
Auteure/Auteur
Keel, C.
Co-dernière auteure/Co-dernier auteur
Maurhofer, M.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1574-6941
Statut éditorial
Publié
Date de publication
2018-08-01
Volume
94
Numéro
8
Première page
1
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Résumé
Conservation tillage and organic farming are strategies used worldwide to preserve the stability and fertility of soils. While positive effects on soil structure have been extensively reported, the effects on specific root- and soil-associated microorganisms are less known. The aim of this study was to investigate how conservation tillage and organic farming influence the frequency and activity of plant-beneficial pseudomonads. Amplicon sequencing using the 16S rRNA gene revealed that Pseudomonas is among the most abundant bacterial taxa in the root microbiome of field-grown wheat, independent of agronomical practices. However, pseudomonads carrying genes required for the biosynthesis of specific antimicrobial compounds were enriched in samples from conventionally farmed plots without tillage. In contrast, disease resistance tests indicated that soil from conventional no tillage plots is less resistant to the soilborne pathogen Pythium ultimum compared to soil from organic reduced tillage plots, which exhibited the highest resistance of all compared cropping systems. Reporter strain-based gene expression assays did not reveal any differences in Pseudomonas antimicrobial gene expression between soils from different cropping systems. Our results suggest that plant-beneficial pseudomonads can be favoured by certain soil cropping systems, but soil resistance against plant diseases is likely determined by a multitude of biotic factors in addition to Pseudomonas.
Sujets
PID Serval
serval:BIB_9C15D6ABCD0D
PMID
Date de création
2018-05-03T16:47:04.631Z
Date de création dans IRIS
2025-05-20T22:08:03Z
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Nom
Dennert-FEMSMIcrobiolEcol-2018 OA voie verte.pdf
Version du manuscrit
postprint
Taille
2.92 MB
Format
Adobe PDF
PID Serval
serval:BIB_9C15D6ABCD0D.P001
URN
urn:nbn:ch:serval-BIB_9C15D6ABCD0D1
Somme de contrôle
(MD5):283b360f17ff18358290190496432fe0