What question did this study set out to answer?

This study aims to explore how keystone taxa in the phyllosphere microbiome contribute to disease resistance against citrus bacterial canker.

Keystone taxa of phyllosphere microbiome confer resistance to citrus bacterial canker in pomelo via multiple mechanisms

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Randomized trial demonstrates disease resistance in pomelo via keystone taxa, indicating microbiome's critical role.

This study aims to explore how keystone taxa in the phyllosphere microbiome contribute to disease resistance against citrus bacterial canker.
Characterized the phyllosphere bacterial community in pomelo over an annual cycle.
Identified five keystone taxa and constructed a consortium of six bacterial strains for testing.
Conducted network analysis and in vitro assays to assess the impact of consortium inoculation on disease resistance.
Consortium inoculation reduced the disease index by 78% in planta.
Inoculation significantly increased the defense-related enzyme activities: PPO, POD, and PAL.
Keystone strains exhibited antagonistic activity against Xcc and produced siderophores.

Yuan et al. (2026) studied this question.

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