Positive effects of metallic nanoparticles on plants: Overview of involved mechanisms

0545763 - ÚEB 2022 RIV FR eng J - Journal Article
Landa, Přemysl
Positive effects of metallic nanoparticles on plants: Overview of involved mechanisms.
Plant Physiology and Biochemistry. Roč. 161, APR (2021), s. 12-24. ISSN 0981-9428. E-ISSN 1873-2690
R&D Projects: GA MŠMT(CZ) EF16_019/0000738
Institutional support: RVO:61389030
Keywords : Beneficial effects * Fertilizer * Growth promotors * Metal * Nanoparticles * Plants
OECD category: Biochemical research methods
Impact factor: 5.437, year: 2021
Method of publishing: Open access
http://doi.org/10.1016/j.plaphy.2021.01.039

Engineered nanoparticles (NPs) are considered as potential agents for agriculture as fertilizers, growth enhancers and pesticides. Therefore, understanding the mechanisms that are responsible for their effects is important. Various studies demonstrated that the application of nontoxic concentrations can promote seed germination, enhance plant growth and increase the yield. Moreover, NPs can be used to protect plants from environmental impacts such as salt or drought stress and diminish accumulation and toxicity of heavy metals. NPs can serve as a source of micronutrients (e.g. ZnO, iron- and manganese-based NPs), thus increasing fitness and helps plants to cope with stress conditions. TiO2 and iron-based NPs are able to delay senescence and speed-up cell division via changes in phytohormonal levels. The application of some NPs can promote the activity of enzymes such as amylase, nitrate reductase, phosphatase, phytase and carbonic anhydrases, which are involved in metabolism and nutrient acquisition. E.g. ZnO and TiO2 NPs can stimulate chlorophyll biosynthesis and photosynthetic activity. Iron-based and CeO2 NPs enhance stomata opening resulting in better gas exchange and CO2 assimilation rate. NPs can also modulate oxidative stress by the stimulation of the antioxidant enzymes such peroxidases and superoxide dismutase. However, the knowledge about the fate, transformation, and accumulation of NPs in the environment and organisms is needed prior to their use in agriculture to avoid negative environmental impacts. Higher or lower toxicity of various NPs was established for microorganisms, plants or animals. In this overview, we focused on the possible mechanisms of Ag, ZnO, TiO2, Fe-based, CeO2, Al2O3, and manganese-based NPs responsible for their positive effects on plants.
Permanent Link: http://hdl.handle.net/11104/0322425