Root exudate metabolites drive plant-soil feedbacks on growth and defense by shaping the rhizosphere microbiota

Hu, Lingfei and Robert, Christelle A. M. and Cadot, Selma and Zhang, Xi and Ye, Meng and Li, Beibei and Manzo, Daniele and Chervet, Noemie and Steinger, Thomas and van der Heijden, Marcel G. A. and Schlaeppi, Klaus and Erb, Matthias. (2018) Root exudate metabolites drive plant-soil feedbacks on growth and defense by shaping the rhizosphere microbiota. Nature Communications, 9 (1). p. 2738.

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By changing soil properties, plants can modify their growth environment. Although the soil microbiota is known to play a key role in the resulting plant-soil feedbacks, the proximal mechanisms underlying this phenomenon remain unknown. We found that benzoxazinoids, a class of defensive secondary metabolites that are released by roots of cereals such as wheat and maize, alter root-associated fungal and bacterial communities, decrease plant growth, increase jasmonate signaling and plant defenses, and suppress herbivore performance in the next plant generation. Complementation experiments demonstrate that the benzoxazinoid breakdown product 6-methoxy-benzoxazolin-2-one (MBOA), which accumulates in the soil during the conditioning phase, is both sufficient and necessary to trigger the observed phenotypic changes. Sterilization, fungal and bacterial profiling and complementation experiments reveal that MBOA acts indirectly by altering root-associated microbiota. Our results reveal a mechanism by which plants determine the composition of rhizosphere microbiota, plant performance and plant-herbivore interactions of the next generation.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Plant-Microbe Interaction (Schl├Ąppi)
UniBasel Contributors:Schl├Ąppi, Klaus Bernhard and Cadot, Selma
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Nov 2020 08:25
Deposited On:13 Nov 2020 08:25

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