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Related Experiment Video

Updated: Jan 25, 2026

Divergence of Root Microbiota in Different Habitats based on Weighted Correlation Networks

Divergence of Root Microbiota in Different Habitats based on Weighted Correlation Networks

Published on: September 25, 2021

A specialized metabolic network selectively modulates Arabidopsis root microbiota.

Ancheng C Huang¹, Ting Jiang^2,3,4, Yong-Xin Liu^2,3

¹Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Colney Lane, Norwich NR4 7UH, UK.

Science (New York, N.Y.)

|May 11, 2019

Summary

Researchers uncovered a plant triterpene network in Arabidopsis roots, revealing how these compounds shape the root microbiome. This discovery sheds light on previously unknown plant specialized metabolites and their ecological roles.

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Area of Science:

Plant biochemistry
Microbiology
Metabolomics

Background:

Plant specialized metabolites play crucial ecological roles, but many remain uncharacterized.
Numerous uncharacterized biosynthetic genes in plant genomes indicate a vast pool of unknown molecules.

Purpose of the Study:

To discover and elucidate novel plant specialized metabolite biosynthetic pathways.
To investigate the ecological role of these metabolites in shaping the plant root microbiome.

Main Methods:

Genetic analysis of Arabidopsis thaliana mutants.
Elucidation and reconstitution of three divergent triterpene biosynthetic pathways.
In vitro bioassays and bacterial co-cultivation experiments.

Main Results:

Three distinct root triterpene biosynthetic pathways (thalianin, thalianyl medium-chain fatty acid esters, arabidin) were elucidated and reconstituted.
Arabidopsis mutants deficient in these pathways exhibited altered root microbiota composition.
Purified triterpenes demonstrated selective growth modulation of specific root bacteria.

Conclusions:

The discovered triterpene biosynthetic network plays a significant role in shaping the Arabidopsis-specific root microbial community.
Plant specialized metabolites are key mediators of plant-microbe interactions in the rhizosphere.
This work expands our understanding of plant metabolic diversity and its ecological implications.