Phyllosphere microbes mediate variety-specific accumulation of di-n-butyl phthalate in choysum (Brassica parachinensis)

ABSTRACT:

Plant-microbe interactions in the phyllosphere have been demonstrated to facilitate plant growth and enhance resistance to diverse stresses; nevertheless, their role in the bioaccumulation of contaminants by plants is rarely considered. Here, by comparing differences in the phyllosphere morphology, bacterial community assembly and metabolites between two choysum (Brassica parachinensis) varieties differing in di-n-butyl phthalate (DBP) accumulation, we revealed the pivotal roles of key phyllosphere exudate (fumarate) and recruited specific microbes in determining the variety-specific DBP accumulation in choysum. The low-DBP accumulation variety (LAV) enhanced the recruitment of phyllosphere microbes capable of degrading DBP by increasing fumarate secretion, relative to the high-DBP accumulation variety (HAV), thereby facilitating the colonization of DBP-degrading bacteria via the induction of biofilm formation and ultimately resulting in lower DBP accumulation in leaves. These findings offer novel insights into the LAV formation from the phyllosphere microbial perspective and highlight the role of phyllosphere microbes in mediating pollutant accumulation within crops, which is instrumental in minimizing pollutant accumulation through regulating the phyllosphere microbial community.

INSTRUMENT(S): Liquid Chromatography MS - negative - reverse phase, Liquid Chromatography MS - positive - reverse phase

PROVIDER: MTBLS12464 | MetaboLights | 2025-07-16

REPOSITORIES: MetaboLights