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Journal ArticleDOI: 10.1039/D0EM00404A

Recent advances in the applications of nano-agrochemicals for sustainable agricultural development

04 Mar 2021-Environmental Science: Processes & Impacts (Royal Society of Chemistry (RSC))-Vol. 23, Iss: 2, pp 213-239
Abstract: Modern agricultural practices have triggered the process of agricultural pollution. This process can cause the degradation of eco-systems, land, and environment owing to the modern-day by-products of agriculture. The substantial use of chemical fertilizers, pesticides, and, contaminated water for irrigation cause further damage to agriculture. The current scenario of the agriculture and food sector has therefore become unsustainable. Nanotechnology has provided innovative and resourceful frontiers to the agriculture sector by contributing practical applications in conventional agricultural ways and practices. There is a large possibility that agri-nanotechnology can have a significant impact on the sustainable agriculture and crop growth. Recent research has shown the potential of nanotechnology in improving the agriculture sector by enhancing the efficiency of agricultural inputs and providing solutions to agricultural problems for improving food productivity and security. The prospective use of nanoscale agrochemicals such as nanofertilizers, nanopesticides, nanosensors, and nanoformulations in agriculture has transformed traditional agro-practices, making them more sustainable and efficient. However, the application of these nano-products in real field situations raises concern about nanomaterial safety, exposure levels, and toxicological repercussions to the environment and human health. The present review gives an insight into recent advancements in nanotechnology-based agrochemicals that have revolutionized the agriculture sector. Further, the implementation barriers related to the nanomaterial use in agriculture, their commercialization potential, and the need for policy regulations to assess possible nano-agricultural risks are also discussed.

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Topics: Agriculture (57%), Sustainable agriculture (56%), Agrochemical (51%) ... read more

10 results found

Open accessJournal ArticleDOI: 10.3390/AGRONOMY11051006
19 May 2021-Agronomy
Abstract: Sandy soils with high alkalinity are characterized by low copper (Cu) contents that lead to many deficiency symptoms in plants. Cu deficiency in plants can be corrected using several cheap Cu sources. Nevertheless, the effects that novel sources, such as Cu nanoparticles (NPs), have on plants remain poorly studied. In the present work, we investigated the effect and efficiency of Cu supplementation to onion (Allium cepa L.) plants using Cu sulfate, chelate, or NPs, and compared their effects on bulb quality, yield, and contents of phytochemicals. Two successive seasons (2018/2019 and 2019/2020) of field experiments were conducted in newly reclaimed sandy soils, where plants were sprayed with either 10 ppm CuO NPs, 20 ppm CuSO4·5H2O, or 20 ppm of Cu chelates. Overall, Cu deficiency (control) resulted in a significant decrease in yield and all quality traits of onion plants. CuO NPs treatment significantly enhanced growth parameters, including plant height, number of leaves, fresh and dry weight, yield, and bulb quality, compared with Cu sulfate and chelates. This was also the case regarding chemical constituents such as macro- and micro-nutrients, total soluble solids, phytochemical compounds, vitamins, and amino acids. Although Cu sulfate is the cheapest form used for Cu supplementation, results of the present study suggest that CuO NPs was not only safe to use, but also was the treatment that led to the highest onion yield and quality.

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Topics: Bulb (51%)

4 Citations

Open accessJournal ArticleDOI: 10.3390/AGRONOMY11061239
18 Jun 2021-Agronomy
Abstract: The Green New Deal requires a profound transformation of the agricultural sector, which will have to become more sustainable and ensure universal access to healthy food. Thus, it will be essential to introduce radical technological innovations. Nanotechnologies have the potential to produce a significant boost to the improvement of the food system. Within this context, in the next years, a strong challenge will need to be faced regarding developing new and more efficient uses of nutrients in agriculture, being the nutrient use efficiency (NUE) paramount in sustaining high crop productivity without depleting biodiversity, and altering both the natural and agricultural systems. Nutrients leaching causes environmental pollution and water eutrophication, while nutrient excess favors pest and weed widespread. Therefore, it will be mandatory to improve plant nutrition efficiency without affecting agricultural productivity and economic sustainability. A promising alternative consists of the introduction of the so-called nanomaterial enhanced fertilizers and plant growth stimulators. Such innovation includes nanotechnological solutions that can improve nutrient delivery for a more finely tuned, accurate, and saving-resources distribution of nutrients. This review provides a critical view of the latest advances in nanofertilizer research, mainly referring to nano-hydroxyapatite, silica nanoparticles, and chitosan-derived nanostructures.

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Topics: Environmental pollution (54%), Food systems (53%), Agricultural productivity (51%) ... read more

2 Citations

Open accessPosted ContentDOI: 10.1101/2021.07.29.454380
30 Jul 2021-bioRxiv
Abstract: Agriculture faces significant global challenges including climate change and an increasing food demand due to a growing population. Addressing these challenges will require the adoption of transformative innovations into biotechnology practice, such as nanotechnology. Recently, nanomaterials have emerged as unmatched tools for their use as biosensors, or as biomolecule delivery vehicles. Despite their increasingly prolific use, plant-nanomaterial interactions remain poorly characterized, drawing into question the breadth of their utility and their broader environmental compatibility. Herein, we characterize Arabidopsis thaliana transcriptional response to single walled carbon nanotubes (SWNTs) with two different surface chemistries commonly used for biosensing and nucleic acid delivery: oligonucleotide adsorbed-pristine SWNTs, and polyethyleneimine-SWNTs loaded with plasmid DNA (PEI-SWNTs), both introduced by leaf infiltration. We observed that SWNTs elicit a mild stress response almost undistinguishable from the infiltration process, indicating that these nanomaterials are well-tolerated by the plant. However, PEI-SWNTs induce a much larger transcriptional reprogramming that involves stress, immunity, and senescence responses. PEI-SWNT-induced transcriptional profile is very similar to that of mutant plants displaying a constitutive immune response or treated with stress-priming agrochemicals. We selected molecular markers from our transcriptomic analysis and identified PEI as the main cause of this reaction. We show that PEI-SWNT response is concentration-dependent and, when persistent over time, leads to cell death. We probed a panel of PEI variant-functionalized SWNTs across two plant species and identified biocompatible SWNT surface functionalizations. Our results highlight the importance of nanoparticle surface chemistry on their biocompatibility and will facilitate the use of functionalized nanomaterials for agricultural improvement. Significance statementNanomaterials can be used in agriculture as biosensors to monitor plant health, as fertilizers or growth regulators, and as delivery vehicles for genome engineering reagents to improve crops. However, the interactions between nanoparticles and plant cells are not well understood. Here, we characterize the plant transcriptomic response to single-walled carbon nanotubes (SWNTs) commonly used for sensing and nucleic acid delivery. While SWNTs themselves are well tolerated by plants, SWNTs surface-functionalized with positively charged polymers become toxic and produce cell death. We identify molecular markers of this toxic response to create biocompatible SWNT formulations. These results highlight the significance of nanoparticle surface chemistry, perhaps more than the nanoparticles themselves, on downstream interactions of nanoparticles with the environment.

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Topics: Population (51%)

1 Citations

Open accessJournal ArticleDOI: 10.1007/S41348-021-00555-7
Swati Gaba1, Ajit Varma1, Arti Goel1Institutions (1)
Abstract: Alternaria blight of oilseed Brassica crop is most widespread disease caused by necrotrophic ascomycetes fungus such as Alternaria brassicae and Alternaria brassicicola which cause huge economic loss. Among large reasons, the key reason for Alternaria blight infection is due to nutrients deficiency such as copper (Cu), zinc (Zn), sulfur (S) and potassium (K). Thus, B. juncea requires different nutrients for improving its health and capability to resist the disease. Since the use of agrochemicals and fungicides is not much efficient, fungal pathogens develop resistance and fungicides have large side effects on human and soil health, there is a need to screen biocidal agents developed through newly advanced and innovative technology known as nanotechnology. Enormous reports have recommended the use of metal oxide nanoparticles (NPs) for disease management such as titanium dioxide NPs (TiO2), iron oxide NPs (Fe3O4), zinc oxide NPs (ZnO NPs), cerium oxide (CeO2) and copper oxide NPs (CuO NPs). Among these, biogenic CuO NPs synthesized from different species of Trichoderma can be considered as promising and most efficient antifungal agent against Alternaria blight. Due to some specific properties, nanoparticles have been used for agricultural needs, among which CuO NPs have special feature as they activate defense system of plants and inhibit spore germination of phytopathogens. The cost effective synthesis and novel properties of CuO NPs makes them an alternative to copper fungicides. Therefore, the following review summarizes an insight into the proposed mechanism of CuO NPs as a protective and curative agent for Alternaria blight disease management. The biogenic CuO NPs monitor the disease development and its control by two methods. One is preventive method in which CuO NPs retard the growth of Alternaria brassicae on susceptible leaf tissues, thus preventing the Alternaria blight, while in another method, CuO NPs act as a curative medicine which kills the pathogen by releasing Alternaria inhibiting compounds and helps in transportation of these compounds at the site of infection. Hence, the current review focused on the properties of CuO NPs for their biocontrol efficacy against Alternaria blight through in vivo studies.

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Topics: Alternaria brassicicola (56%), Alternaria brassicae (54%), Alternaria (53%) ... read more


277 results found

Open accessJournal ArticleDOI: 10.1038/S41598-019-56847-4
Ana Rakita1, Nenad Nikolić1, Michael Mildner1, Johannes Matiasek  +1 moreInstitutions (1)
08 Jan 2020-Scientific Reports
Abstract: A large body of literature is available on wound healing in humans. Nonetheless, a standardized ex vivo wound model without disruption of the dermal compartment has not been put forward with compelling justification. Here, we present a novel wound model based on application of negative pressure and its effects for epidermal regeneration and immune cell behaviour. Importantly, the basement membrane remained intact after blister roof removal and keratinocytes were absent in the wounded area. Upon six days of culture, the wound was covered with one to three-cell thick K14+Ki67+ keratinocyte layers, indicating that proliferation and migration were involved in wound closure. After eight to twelve days, a multi-layered epidermis was formed expressing epidermal differentiation markers (K10, filaggrin, DSG-1, CDSN). Investigations about immune cell-specific manners revealed more T cells in the blister roof epidermis compared to normal epidermis. We identified several cell populations in blister roof epidermis and suction blister fluid that are absent in normal epidermis which correlated with their decrease in the dermis, indicating a dermal efflux upon negative pressure. Together, our model recapitulates the main features of epithelial wound regeneration, and can be applied for testing wound healing therapies and investigating underlying mechanisms.

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Topics: Wound healing (58%), Keratinocyte (57%), Epidermis (botany) (55%) ... read more

2,641 Citations

Open accessJournal ArticleDOI: 10.1038/S41598-018-37186-2
09 Jan 2019-Scientific Reports
Abstract: Polycyclic aromatic compounds (PACs) are known due to their mutagenic activity. Among them, 2-nitrobenzanthrone (2-NBA) and 3-nitrobenzanthrone (3-NBA) are considered as two of the most potent mutagens found in atmospheric particles. In the present study 2-NBA, 3-NBA and selected PAHs and Nitro-PAHs were determined in fine particle samples (PM 2.5) collected in a bus station and an outdoor site. The fuel used by buses was a diesel-biodiesel (96:4) blend and light-duty vehicles run with any ethanol-to-gasoline proportion. The concentrations of 2-NBA and 3-NBA were, on average, under 14.8 µg g−1 and 4.39 µg g−1, respectively. In order to access the main sources and formation routes of these compounds, we performed ternary correlations and multivariate statistical analyses. The main sources for the studied compounds in the bus station were diesel/biodiesel exhaust followed by floor resuspension. In the coastal site, vehicular emission, photochemical formation and wood combustion were the main sources for 2-NBA and 3-NBA as well as the other PACs. Incremental lifetime cancer risk (ILCR) were calculated for both places, which presented low values, showing low cancer risk incidence although the ILCR values for the bus station were around 2.5 times higher than the ILCR from the coastal site.

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2,458 Citations

Journal ArticleDOI: 10.1016/J.WATRES.2012.09.058
Xiaolei Qu1, Pedro J. J. Alvarez1, Qilin Li1Institutions (1)
01 Aug 2013-Water Research
Abstract: Providing clean and affordable water to meet human needs is a grand challenge of the 21st century. Worldwide, water supply struggles to keep up with the fast growing demand, which is exacerbated by population growth, global climate change, and water quality deterioration. The need for technological innovation to enable integrated water management cannot be overstated. Nanotechnology holds great potential in advancing water and wastewater treatment to improve treatment efficiency as well as to augment water supply through safe use of unconventional water sources. Here we review recent development in nanotechnology for water and wastewater treatment. The discussion covers candidate nanomaterials, properties and mechanisms that enable the applications, advantages and limitations as compared to existing processes, and barriers and research needs for commercialization. By tracing these technological advances to the physicochemical properties of nanomaterials, the present review outlines the opportunities and limitations to further capitalize on these unique properties for sustainable water management.

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1,563 Citations

Journal ArticleDOI: 10.1038/NNANO.2009.242
Mélanie Auffan1, Jérôme Rose1, Jérôme Rose2, Jean-Yves Bottero2  +6 moreInstitutions (4)
Abstract: The regulation of engineered nanoparticles requires a widely agreed definition of such particles. Nanoparticles are routinely defined as particles with sizes between about 1 and 100 nm that show properties that are not found in bulk samples of the same material. Here we argue that evidence for novel size-dependent properties alone, rather than particle size, should be the primary criterion in any definition of nanoparticles when making decisions about their regulation for environmental, health and safety reasons. We review the size-dependent properties of a variety of inorganic nanoparticles and find that particles larger than about 30 nm do not in general show properties that would require regulatory scrutiny beyond that required for their bulk counterparts.

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1,456 Citations

Journal ArticleDOI: 10.1021/ES300839E
Abstract: Increasing use of engineered nanomaterials with novel properties relative to their bulk counterparts has generated a need to define their behaviors and impacts in the environment. The high surface ...

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899 Citations

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