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Host preference and invasiveness of commensal bacteria in the Lotus and Arabidopsis root microbiota

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DOI

  • Kathrin Wippel, Max Planck Institute for Plant Breeding Research
  • ,
  • Ke Tao
  • ,
  • Yulong Niu, Max Planck Institute for Plant Breeding Research
  • ,
  • Rafal Zgadzaj, Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research
  • ,
  • Niklas Kiel, University of Cologne and Cluster of Excellence on Plant Sciences (CEPLAS)
  • ,
  • Rui Guan, Max Planck Institute for Plant Breeding Research
  • ,
  • Eik Dahms, Max Planck Institute for Plant Breeding Research
  • ,
  • Pengfan Zhang, Max Planck Institute for Plant Breeding Research
  • ,
  • Dorthe B. Jensen
  • ,
  • Elke Logemann, Max Planck Institute for Plant Breeding Research
  • ,
  • Simona Radutoiu
  • Paul Schulze-Lefert, Max Planck Institute for Plant Breeding Research, University of Cologne and Cluster of Excellence on Plant Sciences (CEPLAS)
  • ,
  • Ruben Garrido-Oter, Max Planck Institute for Plant Breeding Research, University of Cologne and Cluster of Excellence on Plant Sciences (CEPLAS)

Roots of different plant species are colonized by bacterial communities, that are distinct even when hosts share the same habitat. It remains unclear to what extent the host actively selects these communities and whether commensals are adapted to a specific plant species. To address this question, we assembled a sequence-indexed bacterial culture collection from roots and nodules of Lotus japonicus that contains representatives of most species previously identified using metagenomics. We analysed taxonomically paired synthetic communities from L. japonicus and Arabidopsis thaliana in a multi-species gnotobiotic system and detected signatures of host preference among commensal bacteria in a community context, but not in mono-associations. Sequential inoculation experiments revealed priority effects during root microbiota assembly, where established communities are resilient to invasion by latecomers, and that host preference of commensal bacteria confers a competitive advantage in their cognate host. Our findings show that host preference in commensal bacteria from diverse taxonomic groups is associated with their invasiveness into standing root-associated communities.

Original languageEnglish
JournalNature Microbiology
Volume6
Issue9
Pages (from-to)1150-1162
Number of pages13
ISSN2058-5276
DOIs
Publication statusPublished - Sep 2021

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