Siderophore-Mediated Interactions Determine the Disease Suppressiveness of Microbial Consortia - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles mSystems Year : 2020

Siderophore-Mediated Interactions Determine the Disease Suppressiveness of Microbial Consortia

Shaohua Gu
  • Function : Author
Tianjie Yang
  • Function : Author
Zhengying Shao
  • Function : Author
Tao Wang
  • Function : Author
Kehao Cao
  • Function : Author
Alexandre Jousset
Ville-Petri Friman
  • Function : Author
Cyrus Mallon
  • Function : Author
Xinlan Mei
  • Function : Author
Zhong Wei
Yangchun Xu
Qirong Shen
  • Function : Author

Abstract

Interactions between plant pathogens and root-associated microbes play an important role in determining disease outcomes. While several studies have suggested that steering these interactions may improve plant health, such approaches have remained challenging in practice. Because of low iron availability in most soils, competition for iron via secreted siderophore molecules might influence microbial interaction outcomes. Here, we tested if bacterial interactions mediated by iron-scavenging siderophores can be used to predict the disease suppressiveness of microbial consortia against soilborne Ralstonia solanacearum, a bacterial pathogen in the tomato rhizosphere. Iron availability significantly affected the interactions within inoculated consortia and between the consortia and the pathogen. We observed contrasting effects of siderophores and other nonsiderophore metabolites on the pathogen growth, while the siderophore effects were relatively much stronger. Specifically , disease incidence was reduced in vivo when the inoculated consortia produced siderophores that the pathogen could not use for its own growth. Employing siderophore-mediated interactions to engineer functionally robust microbial inocu-lants shows promise in protecting plants from soilborne pathogens. IMPORTANCE Soil-borne pathogens cause high losses in crop yields globally. The development of environmentally friendly approaches is urgently needed, but is often constrained by complex interactions between root-associated microbes and pathogens. Here, we demonstrate that the interactions within microbial consortia mediated by iron-scavenging siderophores play an important role in reducing pathogen infection and enhancing plant health. This study provides a promising and novel research direction for dealing with a wide range of microbial infections through iron exploitation, which is important for the colonization and infection of both plant and human hosts by pathogens.
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Dates and versions

hal-02945889 , version 1 (22-09-2020)

Identifiers

  • HAL Id : hal-02945889 , version 1
  • PUBMED : 32606030
  • WOS : 000576704600003

Cite

Shaohua Gu, Tianjie Yang, Zhengying Shao, Tao Wang, Kehao Cao, et al.. Siderophore-Mediated Interactions Determine the Disease Suppressiveness of Microbial Consortia. mSystems, 2020. ⟨hal-02945889⟩
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