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Specific and conserved patterns of microbiota-structuring by maize benzoxazinoids in the field

Cadot, Selma and Guan, Hang and Bigalke, Moritz and Walser, Jean-Claude and Jander, Georg and Erb, Matthias and van der Heijden, Marcel G. A. and Schlaeppi, Klaus. (2021) Specific and conserved patterns of microbiota-structuring by maize benzoxazinoids in the field. Microbiome, 9 (1). p. 103.

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Official URL: https://edoc.unibas.ch/83074/

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Abstract

Plants influence their root and rhizosphere microbial communities through the secretion of root exudates. However, how specific classes of root exudate compounds impact the assembly of root-associated microbiotas is not well understood, especially not under realistic field conditions. Maize roots secrete benzoxazinoids (BXs), a class of indole-derived defense compounds, and thereby impact the assembly of their microbiota. Here, we investigated the broader impacts of BX exudation on root and rhizosphere microbiotas of adult maize plants grown under natural conditions at different field locations in Europe and the USA. We examined the microbiotas of BX-producing and multiple BX-defective lines in two genetic backgrounds across three soils with different properties.; Our analysis showed that BX secretion affected the community composition of the rhizosphere and root microbiota, with the most pronounced effects observed for root fungi. The impact of BX exudation was at least as strong as the genetic background, suggesting that BX exudation is a key trait by which maize structures its associated microbiota. BX-producing plants were not consistently enriching microbial lineages across the three field experiments. However, BX exudation consistently depleted Flavobacteriaceae and Comamonadaceae and enriched various potential plant pathogenic fungi in the roots across the different environments.; These findings reveal that BXs have a selective impact on root and rhizosphere microbiota composition across different conditions. Taken together, this study identifies the BX pathway as an interesting breeding target to manipulate plant-microbiome interactions. Video Abstract.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Plant-Microbe Interaction (Schl├Ąppi)
UniBasel Contributors:Schl├Ąppi, Klaus
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:BioMed Central
e-ISSN:2049-2618
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:06 Sep 2021 15:43
Deposited On:06 Sep 2021 15:43

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