College of Environmental Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, 410004, Hunan, China.
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, 818 Fenghua Road, Ningbo, 315211, Zhejiang, China.
World J Microbiol Biotechnol. 2022 Jul 7;38(9):155. doi: 10.1007/s11274-022-03347-9.
Characterizing the microbial communities associated with soil-borne disease incidence is a key approach in understanding the potential role of microbes in protecting crops from pathogens. In this study, we compared the soil properties and microbial composition of the rhizosphere soil and roots of healthy and bacterial wilt-infected tobacco plants to assess their potential influence on plant health. Our results revealed that the relative abundance of pathogens was higher in diseased plants than in healthy plants. Moreover, compared with healthy plants, there was a significantly higher microbial alpha diversity in the roots and rhizosphere soil of diseased plants. In addition, we detected a lower abundance of certain plant microbiota, including species in the genera Penicillium, Trichoderma, and Burkholderia in the rhizosphere of diseased plants, which were found to be significantly negatively associated with the relative abundance of Ralstonia. Indeed, compared with healthy plants, the co-occurrence networks of diseased plants included a larger number of associations linked to plant health. Furthermore, structural equation modeling revealed that these specific microbes were correlated with disease suppression, thereby implying that they may play important roles in maintaining plant health. In conclusion, our findings provide important insights into the relationships between soil-borne disease incidence and changes in the belowground microbial community. These findings will serve as a basis for further research investigating the use of specific plant-associated genera to inhibit soil-borne diseases.
研究土壤传播疾病发病率相关的微生物群落是理解微生物在保护作物免受病原体侵害方面的潜在作用的关键方法。在这项研究中，我们比较了健康和细菌性萎蔫病感染烟草植物的根际土壤和根系的土壤特性和微生物组成，以评估它们对植物健康的潜在影响。我们的结果表明，与健康植物相比，患病植物中的病原体相对丰度更高。此外，与健康植物相比，患病植物的根和根际土壤中的微生物α多样性显著更高。此外，我们检测到某些植物微生物群落的丰度降低，包括根际土壤中属于青霉属、木霉属和伯克霍尔德氏菌属的物种，这些物种与雷尔氏菌属的相对丰度呈显著负相关。实际上，与健康植物相比，患病植物的共发生网络包括更多与植物健康相关的关联。此外，结构方程模型表明，这些特定的微生物与疾病抑制相关，这表明它们可能在维持植物健康方面发挥重要作用。总之，我们的研究结果提供了对土壤传播疾病发病率与地下微生物群落变化之间关系的重要见解。这些发现将为进一步研究利用特定的植物相关属来抑制土壤传播疾病提供基础。
