Kong Junqia, Zhou Zhanhua, Li Zhong, Shu Jinping, Zhang Shouke
National Key Laboratory for Development and Utilization of Forest Food Resources, Zhejiang A&F University, Hangzhou, China.
College of Landscape Architecture, Zhejiang A&F University, Hangzhou, China.
Plant Cell Environ. 2025 Aug;48(8):5832-5846. doi: 10.1111/pce.15553. Epub 2025 Apr 17.
Root rot in Camellia oleifera complicates the development of targeted control measures owing to its complex aetiology. Although breeding resistant varieties of C. oleifera presents a promising solution, research into cultivation strategies and potential resistance mechanisms against root rot remains limited. In this study, we investigated six cultivars of C. oleifera that exhibit varying levels of resistance to root rot. We conducted transcriptome analysis, measurements of soil physicochemical properties and an analysis of the fungal microbiome to explore the relationship between Fusarium-induced root rot and flavonoid compounds in the rhizosphere. The resistant cultivar CL18 demonstrated superior performance concerning root rot incidence, root health status and the expression levels of genes associated with flavonoid biosynthesis in this study. Significant differences were observed in the composition and diversity of rhizosphere fungal communities among the various cultivars of C. oleifera. The abundance of Fusarium in the rhizosphere soil of CL18 was low, and a negative correlation was identified between the flavonoid content in the soil and the abundance of Fusarium. Our study uncovers the role of flavonoids in the resistance of C. oleifera to root rot, thereby offering new strategies for disease management and the breeding of resistant cultivars.
油茶根腐病因其病因复杂，使得针对性防治措施的制定变得困难。尽管培育油茶抗病品种是一个很有前景的解决办法，但针对根腐病的栽培策略和潜在抗性机制的研究仍然有限。在本研究中，我们调查了六个对根腐病具有不同抗性水平的油茶品种。我们进行了转录组分析、土壤理化性质测定以及真菌微生物群落分析，以探究镰刀菌引起的根腐病与根际黄酮类化合物之间的关系。在本研究中，抗病品种CL18在根腐病发病率、根系健康状况以及与黄酮生物合成相关基因的表达水平方面表现优异。不同油茶品种根际真菌群落的组成和多样性存在显著差异。CL18根际土壤中镰刀菌的丰度较低，并且土壤中黄酮含量与镰刀菌丰度之间存在负相关。我们的研究揭示了黄酮类化合物在油茶对根腐病抗性中的作用，从而为病害管理和抗病品种选育提供了新策略。
