Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, 150030, Harbin, China.
Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China.
Nat Commun. 2024 Jun 15;15(1):5125. doi: 10.1038/s41467-024-49218-9.
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.
植物的健康状况取决于根际中植物-病原体-微生物群的相互作用。在这里，我们以番茄植物为模型系统，重点研究这个三方系统中病原体尖孢镰刀菌番茄专化型（FOL）和番茄之间的相互作用。首先，我们探索了番茄基因型对 FOL 抗性的差异，这些差异可能与植物保护根际分类群的差异招募有关。其次，我们表明 FOL 产生的镰刀菌酸会引发根际微生物区系的系统性变化。具体来说，我们表明这种分子对抗性和敏感基因型中根际疾病抑制性分类群的招募有相反的影响。最后，我们阐明 FOL 和镰刀菌酸诱导番茄根分泌物的变化，这些变化直接影响特定疾病抑制性分类群的招募。我们的研究通过整合植物对根际中微生物介导机制的生理反应，揭示了一种介导植物根际组装和疾病抑制的机制。
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