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

Hu, Lingfei; Robert, Christelle A. M.; Cadot, Selma; Zhang, Xi; Ye, Meng; Li, Beibei; Manzo, Daniele; Chervet, Noemie; Steinger, Thomas; van der Heijden, Marcel G. A.; Schlaeppi, Klaus; Erb, Matthias (2018). Root exudate metabolites drive plant-soil feedbacks on growth and defense by shaping the rhizosphere microbiota. Nature communications, 9(1) Nature Publishing Group 10.1038/s41467-018-05122-7

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Biotic Interactions

UniBE Contributor:

Hu, Lingfei; Robert, Christelle Aurélie Maud; Zhang, Xi; Ye, Meng; Li, Beibei; Schläppi, Klaus Bernhard and Erb, Matthias

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

2041-1723

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

17 Jul 2018 08:06

Last Modified:

23 Oct 2019 04:26

Publisher DOI:

10.1038/s41467-018-05122-7

Uncontrolled Keywords:

biotic; microbiome; secondary metabolism

BORIS DOI:

10.7892/boris.118583

URI:

https://boris.unibe.ch/id/eprint/118583

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