Root Microbiota Reprogram Aboveground Metabolite Allocation Across Tea Plant Tissues.

In the white tea cultivar Camellia sinensis Zhenghe Dabai, two root synthetic communities increased flavan metabolites—especially proanthocyanidins—while showing distinct tissue-specific allocation patterns.

• Why it matters: Tea quality depends on how specialized metabolites are distributed across tissues, but the coordinated mechanisms by which root microbiota shape aboveground metabolite allocation are unclear.
• What they did: The study combined metabolomics and microbiome profiling, linked leaf-associated taxa to root isolates, then applied SynCom1 and SynCom2 to the rhizosphere and used transcriptomics to track pathway activation.
• The result: SynCom1 and SynCom2 differentially activated flavonoid biosynthesis and amino-acid transport, with SynCom1 upregulating CsCAT1, enabling microbiome-guided tuning of tea metabolite quality.

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