Approaches for the discrimination of suppressive soils for Pythium irregulare disease

Journal ar
Applied Soil Ecology
  • Fecha: 01 January 2019
  • ISSN: 09291393
  • Source Type: Journal
  • DOI: 10.1016/j.apsoil.2019.103439
  • Document Type: Article
  • Publisher: Elsevier B.V.
© 2019The study of soil suppressiveness is of great interest in the field of sustainable agriculture. In the current study, eight soils located in the Region of Murcia (Spain) were sampled, evaluated and categorized according to their suppressiveness against Pythium irregulare in baby-leaf lettuce plants. We analyzed the chemical and biological properties as well as the bacterial and fungal community by sequencing 16S rRNA and ITS genes. We also attempted a non-targeted metabolomics analysis of the soil. The differences between the suppressive and non-suppressive soils were mainly associated with abiotic properties, such as pH, electrical conductivity (CE) and total organic carbon. Yet we also found links to biotic properties: several bacteria and fungi were found in suppressive soils (S) that were less abundant in the medium- (MS) or non-suppressive soils (NS). The differences observed in this study could play a decisive role against P. irregulare, and the data found could contribute significantly to the eventual control of this lettuce pathogen.

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