Poly(ε-caprolactone) nanocapsules carrying the herbicide atrazine: effect of chitosan-coating agent on physico-chemical stability and herbicide release profile

Grillo, Renato; Rosa, André Henrique; Fraceto, Leonardo Fernandes

doi:10.1007/s13762-013-0358-1

Cited by 54 publications

(31 citation statements)

References 40 publications

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“…In another study, polymeric nanoparticles containing ametryn, atrazine, or simazine were slightly less toxic than herbicide alone, when subjected to genotoxicity studies using human lymphocyte and Allium cepa cell cultures [103]. Furthering the work, Grillo et al [104] coated polymeric nanoparticles with different concentrations of chitosan to improve adhesion to target plants, but relied on the previous literature to prove that changing the bonds would provide better adhesion, as no adhesion studies were conducted. Grillo et al [106] also studied the influence of aquatic humic substances, a complex of natural macromolecules in the environment, on paraquat-loaded chitosan.…”

Section: Nanoparticles As Carriers For Herbicidesmentioning

confidence: 99%

Nanotechnology for Plant Disease Management

et al. 2018

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Each year, 20%–40% of crops are lost due to plant pests and pathogens. Existing plant disease management relies predominantly on toxic pesticides that are potentially harmful to humans and the environment. Nanotechnology can offer advantages to pesticides, like reducing toxicity, improving the shelf-life, and increasing the solubility of poorly water-soluble pesticides, all of which could have positive environmental impacts. This review explores the two directions in which nanoparticles can be utilized for plant disease management: either as nanoparticles alone, acting as protectants; or as nanocarriers for insecticides, fungicides, herbicides, and RNA-interference molecules. Despite the several potential advantages associated with the use of nanoparticles, not many nanoparticle-based products have been commercialized for agricultural application. The scarcity of commercial applications could be explained by several factors, such as an insufficient number of field trials and underutilization of pest–crop host systems. In other industries, nanotechnology has progressed rapidly, and the only way to keep up with this advancement for agricultural applications is by understanding the fundamental questions of the research and addressing the scientific gaps to provide a rational and facilitate the development of commercial nanoproducts.

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Section: Nanoparticles As Carriers For Herbicidesmentioning

confidence: 99%

Nanotechnology for Plant Disease Management

et al. 2018

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“…Different types of nanoparticles have been developed by our group as carrier systems for atrazine, including polymeric nanocapsules and nanospheres (Grillo et al, 2012(Grillo et al, , 2014aPereira et al, 2014), and solid lipid nanoparticles (de Oliveira et al, 2015). In particular, atrazine-loaded poly(ε-caprolactone) (PCL) nanocapsules have emerged as a nanoherbicide with promising applications in agriculture (Grillo et al, 2012(Grillo et al, , 2014aPereira et al, 2014). PCL is a biodegradable, aliphatic polyester used in the production of controlled-release systems, and it is non-toxic in humans and the environment (Woodruff and Hutmacher, 2010).…”

Section: Introductionmentioning

confidence: 99%

Post-Emergence Herbicidal Activity of Nanoatrazine Against Susceptible Weeds

Sousa

Gomes

Campos³

et al. 2018

Front. Environ. Sci.

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Poly(ε-caprolactone) (PCL) nanocapsules have been previously developed as a carrier system for atrazine. However, the efficacy of this nanoformulation against weeds commonly found in crop cultures has not been tested yet. Here, we evaluated the post-emergence herbicidal activity of PCL nanocapsules containing atrazine against Amaranthus viridis (slender amaranth) and Bidens pilosa (hairy beggarticks), in comparison with a commercial formulation of atrazine. For both species, treatment with atrazine-loaded nanocapsules (at 2,000 g ha −1) led to a greater decrease in the photosystem II activity (above 50% inhibition relative to the control) than the commercial atrazine formulation at the same concentration (around 40% inhibition). The growth of A. viridis plants was equally reduced by nanoatrazine and commercial formulation (above 64% for root and 75% for shoot). In the case of B. pilosa, atrazine-loaded nanocapsules decreased more effectively the root and shoot growth than the commercial formulation, leading to a loss of plant biomass. Moreover, for both species, the use of 10-fold diluted atrazine-loaded PCL nanocapsules (200 g ha −1) resulted in the same inhibitory effect in root and shoot growth as the commercial formulation at the standard atrazine dose. These results suggest that the utilization of atrazine-containing PCL nanocapsules potentiated the post-emergence control of A. viridis and B. pilosa by the herbicide. Thus, this nanoformulation emerges as an efficient alternative for weed control.

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“…These systems can help to improve the stability of the active agents, increase their effectiveness, and at the same time reduce the possibility of environmental contamination [1,17,18]. Despite these potential benefits, studies aimed to further investigate the effects of nanomaterials on plants remain scarce.…”

Section: Phytotoxicity Of Gsh or Gsno-nanoparticlesmentioning

confidence: 99%

“…It should be noted that characteristics of nanoparticulate systems including particle size, composition, and physicochemical properties might influence their effects during different stages of plant development [19]. In particular, alginate/chitosan are known as biocompatible and biodegradable system ideal for carrying and delivering important molecules in agriculture with no toxic effects to the environment [17,18].…”

Section: Phytotoxicity Of Gsh or Gsno-nanoparticlesmentioning

confidence: 99%

Evaluation of the effects of nitric oxide-releasing nanoparticles on plants

Pereira

Narciso

Seabra

et al. 2015

J. Phys.: Conf. Ser.

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Abstract. Nowadays, there are several commercially available products containing nanostructured materials. Meanwhile, despite the many benefits that can be obtained from nanotechnology, it is still necessary to understand the mechanisms in which nanomaterials interact with the environment, and to obtain information concerning their possible toxic effects. In agriculture, nanotechnology has been used in different applications, such as nanosensors to detect pathogens, nanoparticles as controlled release systems for pesticides, and biofilms to deliver nutrients to plants and to protect food products against degradation. Moreover, plants can be used as models to study the toxicity of nanoparticles. Indeed, phytotoxicity assays are required to identify possible negative effects of nanostructured systems, prior to their implementation in agriculture. Nitric oxide (NO) plays a key role in plant growth and defense, and recently, several papers described the beneficial effects due to application of exogenous NO donors in plants. The tripeptide glutathione (GSH) is an important anti-oxidant molecule and is the precursor of the NO donor, S-nitrosoglutathione (GSNO). In this context, the present work investigates the effects of different concentrations of alginate/chitosan nanoparticles, containing either GSH or GSNO, on the development of two test species (Zea mays and Glycine sp.). The results showed that the alginate/chitosan nanoparticles present a size average range from 300 to 550 nm with a polydispersity index of 0.35, and encapsulation efficiency of GSH between 45 -56%. The NO release kinetics from the alginate/chitosan nanoparticles containing GSNO showed sustained and controlled NO release over several hours. Plant assays showed that at the concentrations tested (1, 5 and 10 mM of GSH or GSNO), polymeric nanoparticles showed no significant inhibitory effects on the development of the species Zea mays and Glycine sp., considering the variables shoot height, root length, and dry mass. Therefore, these nanoparticles seem to have promissing uses in agriculture, and might be potencially used as controlled release systems applied by the foliar route. , and a wide range of polymeric nanoparticles used as carrier systems for active agents [5,6]. Many products containing nanostructured materials are now commercially available, including paints, cosmetics, and electronic goods. Meanwhile, despite the many benefits that can be obtained from this technology, it is still necessary to understand the mechanisms in which nanomaterials interact with the environment, and to obtain information concerning their possible toxic effects.In agriculture, nanotechnology has been used in various ways, with the aim of improving yields and the quality of products [7]. Applications include the use of nanosensors to detect pathogens, nanoparticles as controlled release systems for pesticides, and biofilms to deliver nutrients to plants and protect food products against degradation [1]. The use of nanoparticles as carrier systems for agrochemica...

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Poly(ε-caprolactone) nanocapsules carrying the herbicide atrazine: effect of chitosan-coating agent on physico-chemical stability and herbicide release profile

Cited by 54 publications

References 40 publications

Nanotechnology for Plant Disease Management

Nanotechnology for Plant Disease Management

Post-Emergence Herbicidal Activity of Nanoatrazine Against Susceptible Weeds

Evaluation of the effects of nitric oxide-releasing nanoparticles on plants

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