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Fungal-Bacterial Networks in the Populus Rhizobiome Are Impacted by Soil Properties and Host Genotype

Journal Article · · Frontiers in Microbiology
 [1];  [1];  [2];  [3];  [3];  [4];  [3];  [5];  [2]
  1. Michigan State Univ., East Lansing, MI (United States); Great Lakes Bioenergy Research Center, East Lansing, MI (United States)
  2. Duke Univ., Durham, NC (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  4. Univ. of Florida, Quincy, FL (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations
Plant root-associated microbial symbionts comprise the plant rhizobiome. These microbes function in provisioning nutrients and water to their hosts, impacting plant health and disease. The plant microbiome is shaped by plant species, plant genotype, soil and environmental conditions, but the contributions of these variables are hard to disentangle from each other in natural systems. We used bioassay common garden experiments to decouple plant genotype and soil property impacts on fungal and bacterial community structure in the Populus rhizobiome. High throughput amplification and sequencing of 16S, ITS, 28S and 18S rDNA was accomplished through 454 pyrosequencing. Co-association patterns of fungal and bacterial taxa were assessed with 16S and ITS datasets. Community bipartite fungal-bacterial networks and PERMANOVA results attribute significant difference in fungal or bacterial communities to soil origin, soil chemical properties and plant genotype. Indicator species analysis identified a common set of root bacteria as well as endophytic and ectomycorrhizal fungi associated with Populus in different soils. However, no single taxon, or consortium of microbes, was indicative of a particular Populus genotype. Fungal-bacterial networks were over-represented in arbuscular mycorrhizal, endophytic, and ectomycorrhizal fungi, as well as bacteria belonging to the orders Rhizobiales, Chitinophagales, Cytophagales, and Burkholderiales. These results demonstrate the importance of soil and plant genotype on fungal-bacterial networks in the belowground plant microbiome.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1505327
Journal Information:
Frontiers in Microbiology, Journal Name: Frontiers in Microbiology Journal Issue: 3 Vol. 10; ISSN 1664-302X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Prokaryotic taxa play keystone roles in the soil microbiome associated with woody perennial plants in the genus Buxus journal August 2019
Evidence for Co-evolutionary History of Early Diverging Lycopodiaceae Plants With Fungi journal January 2020
The Bacterial Microbiome of Meloidogyne-Based Disease Complex in Coffee and Tomato journal February 2020

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Related Subjects

59 BASIC BIOLOGICAL SCIENCES
NGS sequencing
Populus deltoides
arbuscular mycorrhizal fungi
bacterial communities
endophytes
fungal communities
microbiome
rhizosphere