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Foliar exposure of Fe 3 O 4 nanoparticles on Nicotiana benthamiana: Evidence for nanoparticles uptake, plant growth promoter and defense response elicitor against plant virus.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2020 Jul 05; Vol. 393, pp. 122415. Date of Electronic Publication: 2020 Feb 26. - Publication Year :
- 2020
-
Abstract
- Nanoparticles are recently employed as a new strategy to directly kill pathogens (e.g., bacteria and fungus) and acted as nanofertilizers. However, the influences of this foliar deposition of nanoparticles on plant physiology particularly plant immunity are poorly understood. The uptake and physiological effects of Fe <subscript>3</subscript> O <subscript>4</subscript> nanoparticles (Fe <subscript>3</subscript> O <subscript>4</subscript> NPs), and plant resistance response against Tobacco mosaic virus (TMV) after foliar spraying were studied. Specifically, Fe <subscript>3</subscript> O <subscript>4</subscript> NPs entered leaf cells and were transported and accumulated throughout the whole Nicotiana benthamiana plant, and increased plant dry and fresh weights, activated plant antioxidants, and upregulated SA synthesis and the expression of SA-responsive PR genes (i.e., PR1 and PR2), thereby enhancing plant resistance against TMV. Conversely, the viral infection was not inhibited in the NahG transgenic plants treated by Fe <subscript>3</subscript> O <subscript>4</subscript> NPs, suggesting the involvement of salicylic acid (SA) induced by Fe <subscript>3</subscript> O <subscript>4</subscript> NPs in the production of plant resistance. Moreover, no inhibition was observed of the infection after inoculating with the pretreated TMV mixtures. Thus, the deposition of Fe <subscript>3</subscript> O <subscript>4</subscript> NPs induced the accumulation of endogenous SA, which was correlated with the plant resistance against TMV infection. Such information is vital for valuing the risk of Fe <subscript>3</subscript> O <subscript>4</subscript> NPs products and broadens the researching and applying nanoparticles in the fight against plant diseases meantime.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2020 Elsevier B.V. All rights reserved.)
- Subjects :
- Plant Leaves drug effects
Plant Leaves growth & development
Plant Leaves metabolism
Plant Leaves virology
Plants, Genetically Modified drug effects
Plants, Genetically Modified growth & development
Plants, Genetically Modified metabolism
Plants, Genetically Modified virology
Salicylic Acid metabolism
Nicotiana growth & development
Nicotiana metabolism
Nicotiana virology
Disease Resistance drug effects
Magnetite Nanoparticles toxicity
Plant Diseases prevention & control
Nicotiana drug effects
Tobacco Mosaic Virus drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 393
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 32143161
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2020.122415