Bio-formulated chitosan nanoparticles enhance disease resistance against rice blast by physiomorphic, transcriptional, and microbiome modulation of rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Hafeez, Rahila

作者： Hafeez, Rahila;Guo, Junning;Ahmed, Temoor;Jiang, Hubiao;Ibrahim, Ezzeldin;An, Qianli;Li, Bin;Ahmed, Temoor;Ahmed, Temoor;Raza, Mubashar;Shahid, Muhammad;Wang, Yanli;Wang, Jiaoyu;Yan, Chengqi;White, Jason C.

作者机构：

关键词： Chitosan; Nanoparticles; Sustainable agriculture; Microbiome; Rice blast; Magnaporthe oryzae

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：11.2； 五年影响因子：10.2 ）

ISSN： 0144-8617

年卷期： 2024 年 334 卷

页码：

收录情况： SCI

摘要： Rice blast disease (RBD) caused by Magnaporthe oryzae, threaten food security by cutting agricultural output. Nano agrochemicals are now perceived as sustainable, cost-effective alternatives to traditional pesticides. This study investigated bioformulation of moringa chitosan nanoparticles (M-CsNPs) and their mechanisms for suppressing RBD while minimizing toxic effects on the microenvironment. M-CsNPs, sized 46 nm with semispherical morphology, significantly suppressed pathogen growth, integrity, and colonization at 200 mg L-1 in vitro. Greenhouse tests with foliar exposure to the same concentration resulted in a substantial 77.7 % reduction in RBD, enhancing antioxidant enzyme activity and plant health. Furthermore, M-CsNPs improved photosynthesis, gas exchange, and the nutritional profile of diseased rice plants. RNA-seq analysis highlighted upregulated defense-related genes in treated rice plants. Metagenomic study showcased reshaping of the rice microbiome, reducing Magnaporthe abundance by 93.5 %. Both healthy and diseased rice plants showed increased microbial diversity, particularly favoring specific beneficial species Thiobacillus, Nitrospira, Nocardioides, and Sphingomicrobium in the rhizosphere and Azonexus, Agarivorans, and Bradyrhizobium in the phyllosphere. This comprehensive study unravels the diverse mechanisms by which M-CsNPs interact with plants and pathogens, curbing M. oryzae damage, promoting plant growth, and modulating the rice microbiome. It underscores the significant potential for effective plant disease management.

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