Distinct root-associated bacterial communities on three wild plant species growing in a common field
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Abstract
Plant roots are known to harbor large and diverse communities of bacteria. It has been suggested that plant identity can structure these root-associated communities, but few studies have specifically assessed how the composition of root microbiota varies within and between plant species growing under natural conditions. We sampled endophytic and epiphytic bacteria in root tissues from a population of a wild, clonal plant (Orange hawkweed – Pilosella aurantiaca) as well as two neighboring plant species (Oxeye daisy – Leucanthemum vulgare and Alsike clover – Trifolium hybridum) to determine if plant species hosted unique root microbiota. Our results show that plants of different species host distinct bacterial communities in their roots. In terms of community composition, Betaproteobacteria (especially the family Oxalobacteraceae) were found to dominate in the root microbiota of L. vulgare and T. hybridum samples, whereas the root microbiota of P. aurantiaca had a more heterogeneous distribution of bacterial abundances where gamma Proteobacteria and Acidobacteria occupied a larger portion of the community. Whether all plant species host their own distinct root microbiota and plants more closely related to each other share more similar bacterial communities still remains to be explored.
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2014. Distinct root-associated bacterial communities on three wild plant species growing in a common field. PeerJ PrePrints 2:e548v1 https://doi.org/10.7287/peerj.preprints.548v1Author comment
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Competing Interests
The authors declare they have no competing interests.
Author Contributions
Kristin Aleklett conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.
Jonathan W Leff contributed reagents/materials/analysis tools, reviewed drafts of the paper.
Noah Fierer contributed reagents/materials/analysis tools, reviewed drafts of the paper.
Miranda Hart conceived and designed the experiments, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.
DNA Deposition
The following information was supplied regarding the deposition of DNA sequences:
FigShare DOI: 10.6084/m9.figshare.1009707
Data Deposition
The following information was supplied regarding the deposition of related data:
FigShare DOI: : 10.6084/m9.figshare.1009707
Funding
This project was funded through a NSERC Discovery Grant to M Hart. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.