Engineered nanomaterials inhibit Podosphaera pannosa infection on rose leaves by regulating phytohormones.
Environ Res
; 170: 1-6, 2019 03.
Article
em En
| MEDLINE
| ID: mdl-30554052
ABSTRACT
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 200â¯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 200â¯mg/L, whereas only CuO NPs decreased fungal growth at 50â¯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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças das Plantas
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Reguladores de Crescimento de Plantas
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Folhas de Planta
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Rosa
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Nanotubos de Carbono
Limite:
Humans
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article