Zhao Shaoguan, Sun Yan, Su Lanxi, Yan Lin, Lin Xingjun, Long Yuzhou, Zhang Ang, Zhao Qingyun
Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Genetic Resources Utilization of Aromatic Beverage Crops, Ministry of Agriculture and Rural Affairs/Hainan Key Laboratory of Genetic Improvement and Quality Control of Tropical Sweet and Spicy Beverage Crops, Wanning 571533, China.
Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China.
J Fungi (Basel). 2025 Feb 17;11(2):154. doi: 10.3390/jof11020154.
It is well established that root exudates play a crucial role in shaping the assembly of plant rhizosphere microbial communities. Nonetheless, our understanding of how different types of exudates influence the abundance of potential pathogens in soil remains insufficient. Investigating the effects of root exudates on soil-dwelling pathogenic fungi is imperative for a comprehensive understanding of plant-fungal interactions within soil ecosystems and for maintaining soil health. This study aimed to elucidate the effects of the principal components of root exudates-flavonoids (FLA), phenolic acids (PA), and organic acids (OA)-on soil microbial communities and soil properties, as well as to investigate their mechanisms of action on soil potential pathogenic fungi. The results demonstrated that the addition of these components significantly modified the composition and diversity of soil microbial communities, with OA treatment notably altering the composition of dominant microbial taxa. Furthermore, the introduction of these substances facilitated the proliferation of saprophytic fungi. Additionally, the incorporation of flavonoids, phenolic acids, and organic acids led to an increased abundance of potential pathogenic fungi in the soil, particularly in the FLA and PA treatments. It was observed that the addition of these substances enhanced soil fertility, pH, and antioxidant enzyme activity. Specifically, FLA and PA treatments reduced the abundance of dominant microbial taxa, whereas OA treatment altered the composition of these taxa. These findings suggest that the inclusion of flavonoids, phenolic acids, and organic acids could potentially augment the enrichment of soil potential pathogenic fungi by modulating soil properties and enzymatic activities. These results offer valuable insights into the interactions between plants and fungal communities in soil ecosystems and provide a scientific foundation for the management and maintenance of soil health.
根系分泌物在塑造植物根际微生物群落的组装过程中起着至关重要的作用，这一点已得到充分证实。尽管如此，我们对于不同类型的分泌物如何影响土壤中潜在病原体的丰度仍了解不足。研究根系分泌物对土壤中致病真菌的影响，对于全面理解土壤生态系统中植物与真菌的相互作用以及维持土壤健康至关重要。本研究旨在阐明根系分泌物的主要成分——黄酮类化合物（FLA）、酚酸（PA）和有机酸（OA）——对土壤微生物群落和土壤性质的影响，并探究它们对土壤潜在致病真菌的作用机制。结果表明，添加这些成分显著改变了土壤微生物群落的组成和多样性，其中OA处理尤其显著地改变了优势微生物类群的组成。此外，引入这些物质促进了腐生真菌的增殖。此外，添加黄酮类化合物、酚酸和有机酸导致土壤中潜在致病真菌的丰度增加，特别是在FLA和PA处理中。观察发现，添加这些物质提高了土壤肥力、pH值和抗氧化酶活性。具体而言，FLA和PA处理降低了优势微生物类群的丰度，而OA处理改变了这些类群的组成。这些发现表明，黄酮类化合物、酚酸和有机酸的添加可能通过调节土壤性质和酶活性来增强土壤潜在致病真菌的富集。这些结果为深入了解土壤生态系统中植物与真菌群落之间的相互作用提供了有价值的见解，并为土壤健康的管理和维护提供了科学依据。
