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Host identity determines plant associated resistomes.

Qing-Lin Chen1, Hang-Wei Hu2, Dong Zhu3

  • 1Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China; Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, 3010, Australia.

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|December 16, 2019
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Summary

Plant identity significantly shapes the antibiotic resistance genes found in the plant phyllosphere microbiome. This research reveals a core set of plant resistomes, crucial for understanding antibiotic resistance spread.

Keywords:
ARGsAntibiotic resistanceMGEsMicrobial communityPlant microbiome

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Area of Science:

  • Microbiology
  • Environmental Science
  • Genetics

Background:

  • The plant microbiome acts as a crucial interface between human and environmental microbiomes.
  • Understanding plant resistomes is vital for assessing antibiotic resistance dissemination.
  • The influence of host plant identity on phyllosphere resistomes remains largely unclear.

Purpose of the Study:

  • To investigate the impact of host plant identity on the profile of antibiotic resistance genes (resistomes) in the plant phyllosphere.
  • To identify shared resistomes across different plant species and their potential implications for human and animal health.

Main Methods:

  • Exploration of phyllosphere microbiome and resistomes in 12 diverse plant species.
  • Utilized High-throughput quantitative PCR (HT-qPCR) for resistance gene identification.
  • Comparative analysis of plant phyllosphere resistomes versus soil resistomes.

Main Results:

  • Identified 172 unique resistance genes in plant phyllosphere microbiomes, distinct from soil resistomes (Adonis, P < 0.01).
  • Host plant identity significantly influenced the plant resistome, primarily due to variations in phyllosphere bacterial phylogeny.
  • Discovered a core set of plant resistomes present in over 80% of samples, constituting 64% of all resistance genes.

Conclusions:

  • Plant host identity plays a significant role in shaping the antibiotic resistance gene pool within the phyllosphere microbiome.
  • The identified core plant resistomes confer resistance to clinically relevant antibiotics, highlighting potential One Health implications.
  • Findings enhance understanding of plant-associated antibiotic resistance and its environmental dissemination pathways.