Biocontrol potential of plant growth-promoting rhizobacteria against plant disease and insect pest

Qinhao Jian, Tongrui Zhang, Yingying Wang, Li Guan, Linlin Li, Longna Wu, Shiyan Chen, Yumei He, Hong Huang, Shugang Tian, Hu Tang, Litang Lu
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Abstract

Biological control is a promising approach to enhance pathogen and pest control to ensure high productivity in cash crop production. Therefore, PGPR biofertilizers are very suitable for application in the cultivation of tea plants (Camellia sinensis) and tobacco, but it is rarely reported so far. In this study, production of a consortium of three strains of PGPR were applied to tobacco and tea plants. The results demonstrated that plants treated with PGPR exhibited enhanced resistance against the bacterial pathogen Pseudomonas syringae (PstDC3000). The significant effect in improving the plant's ability to resist pathogen invasion was verified through measurements of oxygen activity, bacterial colony counts, and expression levels of resistance-related genes (NPR1, PR1, JAZ1, POD etc.). Moreover, the application of PGPR in the tea plantation showed significantly reduced population occurrences of tea green leafhoppers (Empoasca onukii Matsuda), tea thrips (Thysanoptera:Thripidae), Aleurocanthus spiniferus (Quaintanca) and alleviated anthracnose disease in tea seedlings. Therefore, PGPR biofertilizers may serve as a viable biological control method to improve tobacco and tea plant yield and quality. Our findings revealed part of the mechanism by which PGPR helped improve plant biostresses resistance, enabling better application in agricultural production.

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植物生长促进根瘤菌对植物病虫害的生物防治潜力。
生物防治是加强病原体和害虫控制以确保经济作物高产的一种有前途的方法。因此,PGPR 生物肥料非常适合应用于茶树(Camellia sinensis)和烟草的栽培,但至今鲜有报道。本研究将三种 PGPR 菌株组成的联合体应用于烟草和茶树。结果表明,用 PGPR 处理过的植物对细菌性病原体丁香假单胞菌(PstDC3000)表现出更强的抗性。通过测量氧活性、细菌菌落数和抗性相关基因(NPR1、PR1、JAZ1、POD 等)的表达水平,验证了 PGPR 在提高植物抵抗病原体入侵能力方面的显著效果。此外,在茶园中施用 PGPR 后,茶叶绿叶蝉(Empoasca onukii Matsuda)、茶蓟马(Thysanoptera:Thripidae)、茶芒(Aleurocanthus spiniferus (Quaintanca))的数量明显减少,茶苗的炭疽病也有所减轻。因此,PGPR 生物肥料可以作为一种可行的生物防治方法,提高烟草和茶叶的产量和质量。我们的研究结果揭示了 PGPR 帮助提高植物抗生物胁迫能力的部分机理,使其能更好地应用于农业生产。
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来源期刊
CiteScore
5.60
自引率
11.50%
发文量
104
审稿时长
3 months
期刊介绍: Antonie van Leeuwenhoek publishes papers on fundamental and applied aspects of microbiology. Topics of particular interest include: taxonomy, structure & development; biochemistry & molecular biology; physiology & metabolic studies; genetics; ecological studies; especially molecular ecology; marine microbiology; medical microbiology; molecular biological aspects of microbial pathogenesis and bioinformatics.
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