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Maize root bacteria degrade host-specialized metabolites through the lactonase BxdA

ABSTRACT: Maize root bacteria degrade host-specialized metabolites through the lactonase BxdA

PROVIDER: PRJNA1096617 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28564014_1.fastq.gz	Fastqsanger.gz
	SRR28564014_2.fastq.gz	Fastqsanger.gz
	SRR28564015_1.fastq.gz	Fastqsanger.gz
	SRR28564015_2.fastq.gz	Fastqsanger.gz
	SRR28564016_1.fastq.gz	Fastqsanger.gz

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Maize root bacteria degrade host-specialized metabolites through the lactonase BxdA

Project description:Root exudates contain specialised metabolites that affect the plant’s root microbiome. How host-specific microbes cope with these bioactive compounds, and how this ability shapes root microbiomes, remains largely unknown. We investigated how maize root bacteria metabolise benzoxazinoids, the main specialised metabolites of maize. Diverse and abundant bacteria metabolised the major compound in the maize rhizosphere MBOA and formed AMPO. AMPO forming bacteria are enriched in the rhizosphere of benzoxazinoid-producing maize and can use MBOA as carbon source. We identified a novel gene cluster associated with AMPO formation in microbacteria. The first gene in this cluster, bxdA encodes a lactonase that converts MBOA to AMPO in vitro. A deletion mutant of the homologous bxdA genes in the genus Sphingobium, does not form AMPO nor is it able to use MBOA as a carbon source. BxdA was identified in different genera of maize root bacteria. Here we show that plant-specialised metabolites select for metabolisation-competent root bacteria. BxdA represents a novel benzoxazinoid metabolisation gene whose carriers successfully colonize the maize rhizosphere and thereby shape the plant’s chemical environmental footprint

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