Glucosinolate structural diversity shapes recruitment of a metabolic network of leaf-associated bacteria

Kerstin Unger, Syed Ali Komail Raza, Teresa Mayer, Michael Reichelt, Johannes Stuttmann, Annika Hielscher, Ute Wittstock, Jonathan Gershenzon and Matthew T. Agler ()
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Kerstin Unger: Friedrich Schiller University Jena
Syed Ali Komail Raza: Friedrich Schiller University Jena
Teresa Mayer: Friedrich Schiller University Jena
Michael Reichelt: Max-Planck-Institute for Chemical Ecology
Johannes Stuttmann: Aix Marseille University
Annika Hielscher: Technische Universität Braunschweig
Ute Wittstock: Technische Universität Braunschweig
Jonathan Gershenzon: Max-Planck-Institute for Chemical Ecology
Matthew T. Agler: Friedrich Schiller University Jena

Nature Communications, 2024, vol. 15, issue 1, 1-17

Abstract: Abstract Host defenses can have broader ecological roles, but how they shape natural microbiome recruitment is poorly understood. Aliphatic glucosinolates (GLSs) are secondary defense metabolites in Brassicaceae plant leaves. Their genetically defined structure shapes interactions with pests in Arabidopsis thaliana leaves, and here we find that it also shapes bacterial recruitment. In model genotype Col-0, GLSs (mostly 4-methylsulfinylbutyl-GLS) have no clear effect on natural leaf bacterial recruitment. In a genotype from a wild population, however, GLSs (mostly allyl-GLS) enrich specific taxa, mostly Comamonadaceae and Oxalobacteraceae. Consistently, Comamonadaceae are also enriched in wild A. thaliana, and Oxalobacteraceae are enriched from wild plants on allyl-GLS as carbon source, but not on 4-methylsulfinylbutyl-GLS. Recruitment differences between GLS structures most likely arise from bacterial myrosinase specificity. Community recruitment is then defined by metabolic cross-feeding among bacteria. The link of genetically defined metabolites to recruitment could lead to new strategies to shape plant microbiome balance.

Date: 2024
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DOI: 10.1038/s41467-024-52679-7

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