Engineered nanomaterials inhibit Podosphaera pannosa infection on rose leaves by regulating phytohormones
文献类型： 外文期刊
作者： Hao, Yi 1 ; Fang, Peihong 2 ; Ma, Chuanxin 3 ; White, Jason C. 3 ; Xiang, Zhiqian 1 ; Wang, Haitao 5 ; Zhang, Zhao 2 ; Ru 1 ;
作者机构： 1.China Agr Univ, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Coll Resources & Environm Sci, Beijing 100193, Peoples R China
2.China Agr Univ, Beijing Key Lab Dev & Qual Control Ornamental Cro, Dept Ornamental Hort, Coll Hort, Beijing 100193, Peoples R China
3.Connecticut Agr Expt Stn, Dept Analyt Chem, New Haven, CT 06504 USA
4.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA
5.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin 150070, Heilongjiang, Peopl
关键词： Carbon-based nanomaterials; Metal-based nanoparticles; Roses; Powdery mildew; Antifungal activity
期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：6.498； 五年影响因子：6.824 ）
ISSN： 0013-9351
年卷期： 2019 年 170 卷
页码：
收录情况： SCI
摘要： In the present study, we investigated the antifungal effects of engineered nanomaterials (ENMs) against Podosphaera pannosa (P. pannosa), a fungal pathogen that causes powdery mildew on plants in the rose family. Four commercial ENMs, including multi-wall carbon nanotubes (MWCNTs), reduced graphene oxide (rGO), copper oxide (CuO) nanoparticles (NPs) and titanium dioxide (TiO2) NPs, were used to prepare 50 or 200 mg/L NP suspensions in deionized water. Rose leaves in water-agar plates were sprayed by different ENM suspensions mixed with P. pannosa conidia. After a 19-day standard infection test, the growth of P. pannosa on rose leaves was evaluated. All four ENMs inhibited infection by P. pannosa at the concentration 200 mg/L, whereas only CuO NPs decreased fungal growth at 50 mg/L. The phytohormone content of the leaves was measured across all treatments to investigate potential ENMs antifungal mechanisms. The results suggest that ENMs increased plant resistance to fungal infection by altering the content of endogenous hormones, particularly zeatin riboside (ZR). Our study demonstrates that ENMs exhibited distinctly antifungal effects against P. pannosa on roses, and could be utilized as a novel plant protection strategy after a comprehensive assessment of potential environmental risk.
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