Pulse Brain · Growing Health Evidence Index
Tier 3 — Observational / field trialPeer-reviewed

Deciphering composition and function of the root microbiome of a legume plant

Kyle Hartman, Marcel G. A. van der Heijden, Valexia Roussely-Provent, Jean‐Claude Walser, Klaus Schlaeppi

Microbiome · 2017

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Summary

This study characterised the root bacterial microbiome of red clover (Trifolium pratense), a legume important in agricultural and natural ecosystems. Using culture-dependent and molecular approaches, researchers identified Rhizobia as the dominant root colonists (~70% of the microbiome) alongside enriched bacteria from genera potentially conferring disease protection. Functional inoculation experiments demonstrated that while individual abundant microbiome members could suppress plant growth, this negative effect was alleviated through co-inoculation with other root bacteria, indicating that community diversity may buffer against growth-compromising activities of individual strains.

UK applicability

Red clover is an economically important forage legume in UK pastoral systems; understanding its root microbiome may inform management practices that enhance symbiotic nitrogen fixation and disease suppression. However, this laboratory microcosm study requires validation under field conditions representative of UK soil and climatic contexts.

Key measures

Relative abundance of bacterial taxa in root microbiome; number of bacterial isolates cultured; plant growth responses to single and combined bacterial inoculations

Outcomes reported

The study characterised the bacterial root microbiome of Trifolium pratense using culture-dependent and independent methods, and conducted simplified microbiota inoculation experiments to assess the functional roles of individual microbiome members on plant growth. Results showed that Rhizobia bacteria dominated the root microbiome (~70%), and that co-inoculation with multiple microbiome members could alleviate growth-suppressing effects of individual abundant bacteria.

Theme
Farming systems, soils & land use
Subject
Soil biology & microbiology
Study type
Research
Study design
Field sampling and laboratory microcosm experiments
Source type
Peer-reviewed study
Status
Published
Geography
International
System type
Laboratory / in vitro
DOI
10.1186/s40168-016-0220-z
Catalogue ID
BFmou2mhmp-4lb0i5

Topic tags

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