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Antifungal mechanisms of silver nanoparticles on mycotoxin producing rice false smut fungus

文献类型： 外文期刊

作者： Wen, Hui 1 ; Shi, Huanbin 1 ; Jiang, Nan 1 ; Qiu, Jiehua 1 ; Lin, Fucheng 2 ; Kou, Yanjun 1 ;

作者机构： 1.China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 311400, Peoples R China

2.Zhejiang Univ, Coll Agr & Biotechnol, Hangzhou 310058, Peoples R China

3.Inst Plant Protect & Microbiol, Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

关键词： biosynthetic genes

期刊名称：ISCIENCE （ 影响因子：5.8； 五年影响因子：5.8 ）

ISSN：

年卷期： 2023 年 26 卷 1 期

页码：

收录情况： SCI

摘要： Ustilaginoidea virens, which causes rice false smut disease, is a destructive fila-mentous fungal pathogen, attracting more attention to search for effective fun-gicides against U. virens. Here, the results showed that the inhibition of 2 nm AgNPs on U. virens growth and virulence displayed concentration-dependent manner. Abnormalities of fungal morphology were observed upon exposure to AgNPs. RNA-sequencing (RNA-seq) analysis revealed that AgNPs treatment up -regulated 1185 genes and down-regulated 937 genes, which significantly overlapped with the methyltransferase UvKmt6-regulated genes. Furthermore, we found that AgNPs reduced the UvKmt6-mediated H3K27me3 modification, resulting in the up-regulation of ustilaginoidin biosynthetic genes The decrease of H3K27me3 level was associated with the inhibition of mycelial growth by AgNPs treatment. These results suggested that AgNPs are an effective nano -fungicide for the control of rice false smut disease, but when using AgNPs, it needs to be combined with mycotoxin-reducing fungicides to reduce the risk of toxin pollution.

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