1. Fusaric acid mediates the assembly of disease-suppressive rhizosphere microbiota via induced shifts in plant root exudates.
- Author
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Jin, Xue, Jia, Huiting, Ran, Lingyi, Wu, Fengzhi, Liu, Junjie, Schlaeppi, Klaus, Dini-Andreote, Francisco, Wei, Zhong, and Zhou, Xingang
- Subjects
PLANT exudates ,PLANT roots ,RHIZOSPHERE ,EXUDATION (Botany) ,FUSARIUM oxysporum ,H2 receptor antagonists - Abstract
The plant health status is determined by the interplay of plant-pathogen-microbiota in the rhizosphere. Here, we investigate this tripartite system focusing on the pathogen Fusarium oxysporum f. sp. lycopersici (FOL) and tomato plants as a model system. First, we explore differences in tomato genotype resistance to FOL potentially associated with the differential recruitment of plant-protective rhizosphere taxa. Second, we show the production of fusaric acid by FOL to trigger systemic changes in the rhizosphere microbiota. Specifically, we show this molecule to have opposite effects on the recruitment of rhizosphere disease-suppressive taxa in the resistant and susceptible genotypes. Last, we elucidate that FOL and fusaric acid induce changes in the tomato root exudation with direct effects on the recruitment of specific disease-suppressive taxa. Our study unravels a mechanism mediating plant rhizosphere assembly and disease suppression by integrating plant physiological responses to microbial-mediated mechanisms in the rhizosphere. The phytotoxin fusaric acid produced by the phytopathogen Fusarium oxysporum f. sp. lycopersici results in a differential assembly of the rhizosphere microbiota of resistant and susceptible genotypes with implication for disease suppression. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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