Bacterial, archaeal and micro-eukaryotic communities characterize a disease-suppressive or conducive soil and a cultivar resistant or susceptible to common scab - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2019

Bacterial, archaeal and micro-eukaryotic communities characterize a disease-suppressive or conducive soil and a cultivar resistant or susceptible to common scab

Jan Kopecky
  • Fonction : Auteur
Zuzana Samkova
  • Fonction : Auteur
Ensyeh Sarikhani
  • Fonction : Auteur
Martina Kyselková
  • Fonction : Auteur
Marek Omelka
  • Fonction : Auteur
Vaclav Kristufek
  • Fonction : Auteur
Jiri Divis
  • Fonction : Auteur
Marketa Sagova-Mareckova
  • Fonction : Auteur

Résumé

Control of common scab disease can be reached by resistant cultivars or suppressive soils. Both mechanisms are likely to translate into particular potato microbiome profiles, but the relative importance of each is not known. Here, microbiomes of bulk and tuberosphere soil and of potato periderm were studied in one resistant and one susceptible cultivar grown in a conducive and a suppressive field. Disease severity was suppressed similarly by both means yet, the copy numbers of txtB gene (coding for a pathogenicity determinant) were similar in both soils but higher in periderms of the susceptible cultivar from conducive soil. Illumina sequencing of 16S rRNA genes for bacteria (completed by 16S rRNA microarray approach) and archaea, and of 18S rRNA genes for micro-eukarytes showed that in bacteria, the more important was the effect of cultivar and diversity decreased from resistant cultivar to bulk soil to susceptible cultivar. The major changes occurred in proportions of Actinobacteria, Chloroflexi, and Proteobacteria. In archaea and micro-eukaryotes, differences were primarily due to the suppressive and conducive soil. The effect of soil suppressiveness x cultivar resistance depended on the microbial community considered, but differed also with respect to soil and plant nutrient contents particularly in N, S and Fe.
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hal-02473981 , version 1 (26-05-2020)

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Jan Kopecky, Zuzana Samkova, Ensyeh Sarikhani, Martina Kyselková, Marek Omelka, et al.. Bacterial, archaeal and micro-eukaryotic communities characterize a disease-suppressive or conducive soil and a cultivar resistant or susceptible to common scab. Scientific Reports, 2019, 9 (1), pp.14883. ⟨10.1038/s41598-019-51570-6⟩. ⟨hal-02473981⟩
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