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Title: Specialized microbiome of a halophyte and its role in helping non-host plants to withstand salinity

Root microbiota is a crucial determinant of plant productivity and stress tolerance. Here, we hypothesize that the superior halo-tolerance of seepweed Suaeda salsa is tightly linked to a specialized belowground microbiome. To test this hypothesis, we performed a phylogenetic trait-based framework analysis based on bacterial 16S rRNA gene and fungal nuclear rRNA internal transcribed spacer profiling. Data showed that the dominant α-proteobacteria and γ-proteobacteria communities in bulk soil and root endosphere tend to be phylogenetically clustered and at the same time exhibit phylogenetic over-dispersion in rhizosphere. Likewise, the dominant fungal genera occurred at high phylogenetic redundancy. Interestingly, we found the genomes of rhizospheric and endophytic bacteria associated with S. salsa to be enriched in genes contributing to salt stress acclimatization, nutrient solubilization and competitive root colonization. A wide diversity of rhizobacteria with similarity to known halotolerant taxa further supported this interpretation. These findings suggest that an ecological patterned root-microbial interaction strategy has been adopted in S. salsa system to confront soil salinity. We also demonstrated that the potential core microbiome members improve non-host plants growth and salt tolerance. As a result, this work provides a platform to improve plant fitness with halophytes-microbial associates and novel insights into the functions ofmore » plant microbiome under salinity.« less
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [6] ;  [3] ;  [6]
  1. Chinese Academy of Forestry, Hangzhou (People's Republic of China)
  2. Institute of Chemical Engineering, Vienna (Austria)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Adaptive Symbiotic Technologies, Seattle, WA (United States)
  5. Adaptive Symbiotic Technologies, Seattle, WA (United States); Univ. of Washington, Seattle, WA (United States)
  6. Zhejiang Univ. (People's Republic of China)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 10; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
OSTI Identifier: